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mesa/src/freedreno/ir3/ir3_compiler_nir.c

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/*
* Copyright (C) 2015 Rob Clark <robclark@freedesktop.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Rob Clark <robclark@freedesktop.org>
*/
#include <stdarg.h>
#include "util/u_math.h"
#include "util/u_memory.h"
#include "util/u_string.h"
#include "ir3_compiler.h"
#include "ir3_image.h"
#include "ir3_nir.h"
#include "ir3_shader.h"
#include "instr-a3xx.h"
#include "ir3.h"
#include "ir3_context.h"
void
ir3_handle_nonuniform(struct ir3_instruction *instr,
nir_intrinsic_instr *intrin)
{
if (nir_intrinsic_has_access(intrin) &&
(nir_intrinsic_access(intrin) & ACCESS_NON_UNIFORM)) {
instr->flags |= IR3_INSTR_NONUNIF;
}
}
void
ir3_handle_bindless_cat6(struct ir3_instruction *instr, nir_src rsrc)
{
nir_intrinsic_instr *intrin = ir3_bindless_resource(rsrc);
if (!intrin)
return;
instr->flags |= IR3_INSTR_B;
instr->cat6.base = nir_intrinsic_desc_set(intrin);
}
static struct ir3_instruction *
create_input(struct ir3_context *ctx, unsigned compmask)
{
struct ir3_instruction *in;
in = ir3_instr_create(ctx->in_block, OPC_META_INPUT, 1, 0);
in->input.sysval = ~0;
__ssa_dst(in)->wrmask = compmask;
array_insert(ctx->ir, ctx->ir->inputs, in);
return in;
}
static struct ir3_instruction *
create_frag_input(struct ir3_context *ctx, struct ir3_instruction *coord,
unsigned n)
{
struct ir3_block *block = ctx->block;
struct ir3_instruction *instr;
/* packed inloc is fixed up later: */
struct ir3_instruction *inloc = create_immed(block, n);
if (coord) {
instr = ir3_BARY_F(block, inloc, 0, coord, 0);
} else if (ctx->compiler->flat_bypass) {
if (ctx->compiler->gen >= 6) {
instr = ir3_FLAT_B(block, inloc, 0, inloc, 0);
} else {
instr = ir3_LDLV(block, inloc, 0, create_immed(block, 1), 0);
instr->cat6.type = TYPE_U32;
instr->cat6.iim_val = 1;
}
} else {
instr = ir3_BARY_F(block, inloc, 0, ctx->ij[IJ_PERSP_PIXEL], 0);
instr->srcs[1]->wrmask = 0x3;
}
return instr;
}
static struct ir3_instruction *
create_driver_param(struct ir3_context *ctx, enum ir3_driver_param dp)
{
/* first four vec4 sysval's reserved for UBOs: */
/* NOTE: dp is in scalar, but there can be >4 dp components: */
struct ir3_const_state *const_state = ir3_const_state(ctx->so);
unsigned n = const_state->offsets.driver_param;
unsigned r = regid(n + dp / 4, dp % 4);
return create_uniform(ctx->block, r);
}
/*
* Adreno's comparisons produce a 1 for true and 0 for false, in either 16 or
* 32-bit registers. We use NIR's 1-bit integers to represent bools, and
* trust that we will only see and/or/xor on those 1-bit values, so we can
* safely store NIR i1s in a 32-bit reg while always containing either a 1 or
* 0.
*/
/*
* alu/sfu instructions:
*/
static struct ir3_instruction *
create_cov(struct ir3_context *ctx, struct ir3_instruction *src,
unsigned src_bitsize, nir_op op)
{
type_t src_type, dst_type;
switch (op) {
case nir_op_f2f32:
case nir_op_f2f16_rtne:
case nir_op_f2f16_rtz:
case nir_op_f2f16:
case nir_op_f2i32:
case nir_op_f2i16:
case nir_op_f2i8:
case nir_op_f2u32:
case nir_op_f2u16:
case nir_op_f2u8:
switch (src_bitsize) {
case 32:
src_type = TYPE_F32;
break;
case 16:
src_type = TYPE_F16;
break;
default:
ir3_context_error(ctx, "invalid src bit size: %u", src_bitsize);
}
break;
case nir_op_i2f32:
case nir_op_i2f16:
case nir_op_i2i32:
case nir_op_i2i16:
case nir_op_i2i8:
switch (src_bitsize) {
case 32:
src_type = TYPE_S32;
break;
case 16:
src_type = TYPE_S16;
break;
case 8:
src_type = TYPE_S8;
break;
default:
ir3_context_error(ctx, "invalid src bit size: %u", src_bitsize);
}
break;
case nir_op_u2f32:
case nir_op_u2f16:
case nir_op_u2u32:
case nir_op_u2u16:
case nir_op_u2u8:
switch (src_bitsize) {
case 32:
src_type = TYPE_U32;
break;
case 16:
src_type = TYPE_U16;
break;
case 8:
src_type = TYPE_U8;
break;
default:
ir3_context_error(ctx, "invalid src bit size: %u", src_bitsize);
}
break;
case nir_op_b2f16:
case nir_op_b2f32:
case nir_op_b2i8:
case nir_op_b2i16:
case nir_op_b2i32:
src_type = ctx->compiler->bool_type;
break;
default:
ir3_context_error(ctx, "invalid conversion op: %u", op);
}
switch (op) {
case nir_op_f2f32:
case nir_op_i2f32:
case nir_op_u2f32:
case nir_op_b2f32:
dst_type = TYPE_F32;
break;
case nir_op_f2f16_rtne:
case nir_op_f2f16_rtz:
case nir_op_f2f16:
case nir_op_i2f16:
case nir_op_u2f16:
case nir_op_b2f16:
dst_type = TYPE_F16;
break;
case nir_op_f2i32:
case nir_op_i2i32:
case nir_op_b2i32:
dst_type = TYPE_S32;
break;
case nir_op_f2i16:
case nir_op_i2i16:
case nir_op_b2i16:
dst_type = TYPE_S16;
break;
case nir_op_f2i8:
case nir_op_i2i8:
case nir_op_b2i8:
dst_type = TYPE_S8;
break;
case nir_op_f2u32:
case nir_op_u2u32:
dst_type = TYPE_U32;
break;
case nir_op_f2u16:
case nir_op_u2u16:
dst_type = TYPE_U16;
break;
case nir_op_f2u8:
case nir_op_u2u8:
dst_type = TYPE_U8;
break;
default:
ir3_context_error(ctx, "invalid conversion op: %u", op);
}
if (src_type == dst_type)
return src;
struct ir3_instruction *cov = ir3_COV(ctx->block, src, src_type, dst_type);
if (op == nir_op_f2f16_rtne) {
cov->cat1.round = ROUND_EVEN;
} else if (op == nir_op_f2f16) {
unsigned execution_mode = ctx->s->info.float_controls_execution_mode;
nir_rounding_mode rounding_mode =
nir_get_rounding_mode_from_float_controls(execution_mode,
nir_type_float16);
if (rounding_mode == nir_rounding_mode_rtne)
cov->cat1.round = ROUND_EVEN;
}
return cov;
}
/* For shift instructions NIR always has shift amount as 32 bit integer */
static struct ir3_instruction *
resize_shift_amount(struct ir3_context *ctx, struct ir3_instruction *src,
unsigned bs)
{
if (bs != 16)
return src;
return ir3_COV(ctx->block, src, TYPE_U32, TYPE_U16);
}
static void
emit_alu_dot_4x8_as_dp4acc(struct ir3_context *ctx, nir_alu_instr *alu,
struct ir3_instruction **dst,
struct ir3_instruction **src)
{
struct ir3_instruction *accumulator = NULL;
if (alu->op == nir_op_udot_4x8_uadd_sat) {
accumulator = create_immed(ctx->block, 0);
} else {
accumulator = src[2];
}
dst[0] = ir3_DP4ACC(ctx->block, src[0], 0, src[1], 0, accumulator, 0);
if (alu->op == nir_op_udot_4x8_uadd ||
alu->op == nir_op_udot_4x8_uadd_sat) {
dst[0]->cat3.signedness = IR3_SRC_UNSIGNED;
} else {
dst[0]->cat3.signedness = IR3_SRC_MIXED;
}
/* For some reason (sat) doesn't work in unsigned case so
* we have to emulate it.
*/
if (alu->op == nir_op_udot_4x8_uadd_sat) {
dst[0] = ir3_ADD_U(ctx->block, dst[0], 0, src[2], 0);
dst[0]->flags |= IR3_INSTR_SAT;
} else if (alu->op == nir_op_sudot_4x8_iadd_sat) {
dst[0]->flags |= IR3_INSTR_SAT;
}
}
static void
emit_alu_dot_4x8_as_dp2acc(struct ir3_context *ctx, nir_alu_instr *alu,
struct ir3_instruction **dst,
struct ir3_instruction **src)
{
int signedness;
if (alu->op == nir_op_udot_4x8_uadd ||
alu->op == nir_op_udot_4x8_uadd_sat) {
signedness = IR3_SRC_UNSIGNED;
} else {
signedness = IR3_SRC_MIXED;
}
struct ir3_instruction *accumulator = NULL;
if (alu->op == nir_op_udot_4x8_uadd_sat ||
alu->op == nir_op_sudot_4x8_iadd_sat) {
accumulator = create_immed(ctx->block, 0);
} else {
accumulator = src[2];
}
dst[0] = ir3_DP2ACC(ctx->block, src[0], 0, src[1], 0, accumulator, 0);
dst[0]->cat3.packed = IR3_SRC_PACKED_LOW;
dst[0]->cat3.signedness = signedness;
dst[0] = ir3_DP2ACC(ctx->block, src[0], 0, src[1], 0, dst[0], 0);
dst[0]->cat3.packed = IR3_SRC_PACKED_HIGH;
dst[0]->cat3.signedness = signedness;
if (alu->op == nir_op_udot_4x8_uadd_sat) {
dst[0] = ir3_ADD_U(ctx->block, dst[0], 0, src[2], 0);
dst[0]->flags |= IR3_INSTR_SAT;
} else if (alu->op == nir_op_sudot_4x8_iadd_sat) {
dst[0] = ir3_ADD_S(ctx->block, dst[0], 0, src[2], 0);
dst[0]->flags |= IR3_INSTR_SAT;
}
}
static void
emit_alu(struct ir3_context *ctx, nir_alu_instr *alu)
{
const nir_op_info *info = &nir_op_infos[alu->op];
struct ir3_instruction **dst, *src[info->num_inputs];
unsigned bs[info->num_inputs]; /* bit size */
struct ir3_block *b = ctx->block;
unsigned dst_sz, wrmask;
type_t dst_type = type_uint_size(nir_dest_bit_size(alu->dest.dest));
if (alu->dest.dest.is_ssa) {
dst_sz = alu->dest.dest.ssa.num_components;
wrmask = (1 << dst_sz) - 1;
} else {
dst_sz = alu->dest.dest.reg.reg->num_components;
wrmask = alu->dest.write_mask;
}
dst = ir3_get_dst(ctx, &alu->dest.dest, dst_sz);
/* Vectors are special in that they have non-scalarized writemasks,
* and just take the first swizzle channel for each argument in
* order into each writemask channel.
*/
if ((alu->op == nir_op_vec2) || (alu->op == nir_op_vec3) ||
(alu->op == nir_op_vec4) || (alu->op == nir_op_vec8) ||
(alu->op == nir_op_vec16)) {
for (int i = 0; i < info->num_inputs; i++) {
nir_alu_src *asrc = &alu->src[i];
compile_assert(ctx, !asrc->abs);
compile_assert(ctx, !asrc->negate);
src[i] = ir3_get_src(ctx, &asrc->src)[asrc->swizzle[0]];
if (!src[i])
src[i] = create_immed_typed(ctx->block, 0, dst_type);
dst[i] = ir3_MOV(b, src[i], dst_type);
}
ir3_put_dst(ctx, &alu->dest.dest);
return;
}
/* We also get mov's with more than one component for mov's so
* handle those specially:
*/
if (alu->op == nir_op_mov) {
nir_alu_src *asrc = &alu->src[0];
struct ir3_instruction *const *src0 = ir3_get_src(ctx, &asrc->src);
for (unsigned i = 0; i < dst_sz; i++) {
if (wrmask & (1 << i)) {
dst[i] = ir3_MOV(b, src0[asrc->swizzle[i]], dst_type);
} else {
dst[i] = NULL;
}
}
ir3_put_dst(ctx, &alu->dest.dest);
return;
}
/* General case: We can just grab the one used channel per src. */
for (int i = 0; i < info->num_inputs; i++) {
unsigned chan = ffs(alu->dest.write_mask) - 1;
nir_alu_src *asrc = &alu->src[i];
compile_assert(ctx, !asrc->abs);
compile_assert(ctx, !asrc->negate);
src[i] = ir3_get_src(ctx, &asrc->src)[asrc->swizzle[chan]];
bs[i] = nir_src_bit_size(asrc->src);
compile_assert(ctx, src[i]);
}
switch (alu->op) {
case nir_op_f2f32:
case nir_op_f2f16_rtne:
case nir_op_f2f16_rtz:
case nir_op_f2f16:
case nir_op_f2i32:
case nir_op_f2i16:
case nir_op_f2i8:
case nir_op_f2u32:
case nir_op_f2u16:
case nir_op_f2u8:
case nir_op_i2f32:
case nir_op_i2f16:
case nir_op_i2i32:
case nir_op_i2i16:
case nir_op_i2i8:
case nir_op_u2f32:
case nir_op_u2f16:
case nir_op_u2u32:
case nir_op_u2u16:
case nir_op_u2u8:
case nir_op_b2f16:
case nir_op_b2f32:
case nir_op_b2i8:
case nir_op_b2i16:
case nir_op_b2i32:
dst[0] = create_cov(ctx, src[0], bs[0], alu->op);
break;
case nir_op_fquantize2f16:
dst[0] = create_cov(ctx, create_cov(ctx, src[0], 32, nir_op_f2f16_rtne),
16, nir_op_f2f32);
break;
case nir_op_f2b1:
dst[0] = ir3_CMPS_F(
b, src[0], 0,
create_immed_typed(b, 0, type_float_size(bs[0])), 0);
dst[0]->cat2.condition = IR3_COND_NE;
break;
case nir_op_i2b1:
/* i2b1 will appear when translating from nir_load_ubo or
* nir_intrinsic_load_ssbo, where any non-zero value is true.
*/
dst[0] = ir3_CMPS_S(
b, src[0], 0,
create_immed_typed(b, 0, type_uint_size(bs[0])), 0);
dst[0]->cat2.condition = IR3_COND_NE;
break;
case nir_op_b2b1:
/* b2b1 will appear when translating from
*
* - nir_intrinsic_load_shared of a 32-bit 0/~0 value.
* - nir_intrinsic_load_constant of a 32-bit 0/~0 value
*
* A negate can turn those into a 1 or 0 for us.
*/
dst[0] = ir3_ABSNEG_S(b, src[0], IR3_REG_SNEG);
break;
case nir_op_b2b32:
/* b2b32 will appear when converting our 1-bit bools to a store_shared
* argument.
*
* A negate can turn those into a ~0 for us.
*/
dst[0] = ir3_ABSNEG_S(b, src[0], IR3_REG_SNEG);
break;
case nir_op_fneg:
dst[0] = ir3_ABSNEG_F(b, src[0], IR3_REG_FNEG);
break;
case nir_op_fabs:
dst[0] = ir3_ABSNEG_F(b, src[0], IR3_REG_FABS);
break;
case nir_op_fmax:
dst[0] = ir3_MAX_F(b, src[0], 0, src[1], 0);
break;
case nir_op_fmin:
dst[0] = ir3_MIN_F(b, src[0], 0, src[1], 0);
break;
case nir_op_fsat:
/* if there is just a single use of the src, and it supports
* (sat) bit, we can just fold the (sat) flag back to the
* src instruction and create a mov. This is easier for cp
* to eliminate.
*/
if (alu->src[0].src.is_ssa && is_sat_compatible(src[0]->opc) &&
(list_length(&alu->src[0].src.ssa->uses) == 1)) {
src[0]->flags |= IR3_INSTR_SAT;
dst[0] = ir3_MOV(b, src[0], dst_type);
} else {
/* otherwise generate a max.f that saturates.. blob does
* similar (generating a cat2 mov using max.f)
*/
dst[0] = ir3_MAX_F(b, src[0], 0, src[0], 0);
dst[0]->flags |= IR3_INSTR_SAT;
}
break;
case nir_op_fmul:
dst[0] = ir3_MUL_F(b, src[0], 0, src[1], 0);
break;
case nir_op_fadd:
dst[0] = ir3_ADD_F(b, src[0], 0, src[1], 0);
break;
case nir_op_fsub:
dst[0] = ir3_ADD_F(b, src[0], 0, src[1], IR3_REG_FNEG);
break;
case nir_op_ffma:
dst[0] = ir3_MAD_F32(b, src[0], 0, src[1], 0, src[2], 0);
break;
case nir_op_fddx:
case nir_op_fddx_coarse:
dst[0] = ir3_DSX(b, src[0], 0);
dst[0]->cat5.type = TYPE_F32;
break;
case nir_op_fddx_fine:
dst[0] = ir3_DSXPP_MACRO(b, src[0], 0);
dst[0]->cat5.type = TYPE_F32;
break;
case nir_op_fddy:
case nir_op_fddy_coarse:
dst[0] = ir3_DSY(b, src[0], 0);
dst[0]->cat5.type = TYPE_F32;
break;
break;
case nir_op_fddy_fine:
dst[0] = ir3_DSYPP_MACRO(b, src[0], 0);
dst[0]->cat5.type = TYPE_F32;
break;
case nir_op_flt:
dst[0] = ir3_CMPS_F(b, src[0], 0, src[1], 0);
dst[0]->cat2.condition = IR3_COND_LT;
break;
case nir_op_fge:
dst[0] = ir3_CMPS_F(b, src[0], 0, src[1], 0);
dst[0]->cat2.condition = IR3_COND_GE;
break;
case nir_op_feq:
dst[0] = ir3_CMPS_F(b, src[0], 0, src[1], 0);
dst[0]->cat2.condition = IR3_COND_EQ;
break;
case nir_op_fneu:
dst[0] = ir3_CMPS_F(b, src[0], 0, src[1], 0);
dst[0]->cat2.condition = IR3_COND_NE;
break;
case nir_op_fceil:
dst[0] = ir3_CEIL_F(b, src[0], 0);
break;
case nir_op_ffloor:
dst[0] = ir3_FLOOR_F(b, src[0], 0);
break;
case nir_op_ftrunc:
dst[0] = ir3_TRUNC_F(b, src[0], 0);
break;
case nir_op_fround_even:
dst[0] = ir3_RNDNE_F(b, src[0], 0);
break;
case nir_op_fsign:
dst[0] = ir3_SIGN_F(b, src[0], 0);
break;
case nir_op_fsin:
dst[0] = ir3_SIN(b, src[0], 0);
break;
case nir_op_fcos:
dst[0] = ir3_COS(b, src[0], 0);
break;
case nir_op_frsq:
dst[0] = ir3_RSQ(b, src[0], 0);
break;
case nir_op_frcp:
dst[0] = ir3_RCP(b, src[0], 0);
break;
case nir_op_flog2:
dst[0] = ir3_LOG2(b, src[0], 0);
break;
case nir_op_fexp2:
dst[0] = ir3_EXP2(b, src[0], 0);
break;
case nir_op_fsqrt:
dst[0] = ir3_SQRT(b, src[0], 0);
break;
case nir_op_iabs:
dst[0] = ir3_ABSNEG_S(b, src[0], IR3_REG_SABS);
break;
case nir_op_iadd:
dst[0] = ir3_ADD_U(b, src[0], 0, src[1], 0);
break;
case nir_op_ihadd:
dst[0] = ir3_ADD_S(b, src[0], 0, src[1], 0);
dst[0]->dsts[0]->flags |= IR3_REG_EI;
break;
case nir_op_uhadd:
dst[0] = ir3_ADD_U(b, src[0], 0, src[1], 0);
dst[0]->dsts[0]->flags |= IR3_REG_EI;
break;
case nir_op_iand:
dst[0] = ir3_AND_B(b, src[0], 0, src[1], 0);
break;
case nir_op_imax:
dst[0] = ir3_MAX_S(b, src[0], 0, src[1], 0);
break;
case nir_op_umax:
dst[0] = ir3_MAX_U(b, src[0], 0, src[1], 0);
break;
case nir_op_imin:
dst[0] = ir3_MIN_S(b, src[0], 0, src[1], 0);
break;
case nir_op_umin:
dst[0] = ir3_MIN_U(b, src[0], 0, src[1], 0);
break;
case nir_op_umul_low:
dst[0] = ir3_MULL_U(b, src[0], 0, src[1], 0);
break;
case nir_op_imadsh_mix16:
dst[0] = ir3_MADSH_M16(b, src[0], 0, src[1], 0, src[2], 0);
break;
case nir_op_imad24_ir3:
dst[0] = ir3_MAD_S24(b, src[0], 0, src[1], 0, src[2], 0);
break;
case nir_op_imul:
compile_assert(ctx, nir_dest_bit_size(alu->dest.dest) == 16);
dst[0] = ir3_MUL_S24(b, src[0], 0, src[1], 0);
break;
case nir_op_imul24:
dst[0] = ir3_MUL_S24(b, src[0], 0, src[1], 0);
break;
case nir_op_ineg:
dst[0] = ir3_ABSNEG_S(b, src[0], IR3_REG_SNEG);
break;
case nir_op_inot:
if (bs[0] == 1) {
struct ir3_instruction *one =
create_immed_typed(ctx->block, 1, ctx->compiler->bool_type);
dst[0] = ir3_SUB_U(b, one, 0, src[0], 0);
} else {
dst[0] = ir3_NOT_B(b, src[0], 0);
}
break;
case nir_op_ior:
dst[0] = ir3_OR_B(b, src[0], 0, src[1], 0);
break;
case nir_op_ishl:
dst[0] =
ir3_SHL_B(b, src[0], 0, resize_shift_amount(ctx, src[1], bs[0]), 0);
break;
case nir_op_ishr:
dst[0] =
ir3_ASHR_B(b, src[0], 0, resize_shift_amount(ctx, src[1], bs[0]), 0);
break;
case nir_op_isub:
dst[0] = ir3_SUB_U(b, src[0], 0, src[1], 0);
break;
case nir_op_ixor:
dst[0] = ir3_XOR_B(b, src[0], 0, src[1], 0);
break;
case nir_op_ushr:
dst[0] =
ir3_SHR_B(b, src[0], 0, resize_shift_amount(ctx, src[1], bs[0]), 0);
break;
case nir_op_ilt:
dst[0] = ir3_CMPS_S(b, src[0], 0, src[1], 0);
dst[0]->cat2.condition = IR3_COND_LT;
break;
case nir_op_ige:
dst[0] = ir3_CMPS_S(b, src[0], 0, src[1], 0);
dst[0]->cat2.condition = IR3_COND_GE;
break;
case nir_op_ieq:
dst[0] = ir3_CMPS_S(b, src[0], 0, src[1], 0);
dst[0]->cat2.condition = IR3_COND_EQ;
break;
case nir_op_ine:
dst[0] = ir3_CMPS_S(b, src[0], 0, src[1], 0);
dst[0]->cat2.condition = IR3_COND_NE;
break;
case nir_op_ult:
dst[0] = ir3_CMPS_U(b, src[0], 0, src[1], 0);
dst[0]->cat2.condition = IR3_COND_LT;
break;
case nir_op_uge:
dst[0] = ir3_CMPS_U(b, src[0], 0, src[1], 0);
dst[0]->cat2.condition = IR3_COND_GE;
break;
case nir_op_bcsel: {
struct ir3_instruction *cond = src[0];
/* If src[0] is a negation (likely as a result of an ir3_b2n(cond)),
* we can ignore that and use original cond, since the nonzero-ness of
* cond stays the same.
*/
if (cond->opc == OPC_ABSNEG_S && cond->flags == 0 &&
(cond->srcs[0]->flags & (IR3_REG_SNEG | IR3_REG_SABS)) ==
IR3_REG_SNEG) {
cond = cond->srcs[0]->def->instr;
}
compile_assert(ctx, bs[1] == bs[2]);
/* The condition's size has to match the other two arguments' size, so
* convert down if necessary.
*
* Single hashtable is fine, because the conversion will either be
* 16->32 or 32->16, but never both
*/
if (is_half(src[1]) != is_half(cond)) {
struct hash_entry *prev_entry =
_mesa_hash_table_search(ctx->sel_cond_conversions, src[0]);
if (prev_entry) {
cond = prev_entry->data;
} else {
if (is_half(cond)) {
cond = ir3_COV(b, cond, TYPE_U16, TYPE_U32);
} else {
cond = ir3_COV(b, cond, TYPE_U32, TYPE_U16);
}
_mesa_hash_table_insert(ctx->sel_cond_conversions, src[0], cond);
}
}
if (is_half(src[1])) {
dst[0] = ir3_SEL_B16(b, src[1], 0, cond, 0, src[2], 0);
} else {
dst[0] = ir3_SEL_B32(b, src[1], 0, cond, 0, src[2], 0);
}
break;
}
case nir_op_bit_count: {
if (ctx->compiler->gen < 5 || (src[0]->dsts[0]->flags & IR3_REG_HALF)) {
dst[0] = ir3_CBITS_B(b, src[0], 0);
break;
}
// We need to do this 16b at a time on a5xx+a6xx. Once half-precision
// support is in place, this should probably move to a NIR lowering pass:
struct ir3_instruction *hi, *lo;
hi = ir3_COV(b, ir3_SHR_B(b, src[0], 0, create_immed(b, 16), 0), TYPE_U32,
TYPE_U16);
lo = ir3_COV(b, src[0], TYPE_U32, TYPE_U16);
hi = ir3_CBITS_B(b, hi, 0);
lo = ir3_CBITS_B(b, lo, 0);
// TODO maybe the builders should default to making dst half-precision
// if the src's were half precision, to make this less awkward.. otoh
// we should probably just do this lowering in NIR.
hi->dsts[0]->flags |= IR3_REG_HALF;
lo->dsts[0]->flags |= IR3_REG_HALF;
dst[0] = ir3_ADD_S(b, hi, 0, lo, 0);
dst[0]->dsts[0]->flags |= IR3_REG_HALF;
dst[0] = ir3_COV(b, dst[0], TYPE_U16, TYPE_U32);
break;
}
case nir_op_ifind_msb: {
struct ir3_instruction *cmp;
dst[0] = ir3_CLZ_S(b, src[0], 0);
cmp = ir3_CMPS_S(b, dst[0], 0, create_immed(b, 0), 0);
cmp->cat2.condition = IR3_COND_GE;
dst[0] = ir3_SEL_B32(b, ir3_SUB_U(b, create_immed(b, 31), 0, dst[0], 0),
0, cmp, 0, dst[0], 0);
break;
}
case nir_op_ufind_msb:
dst[0] = ir3_CLZ_B(b, src[0], 0);
dst[0] = ir3_SEL_B32(b, ir3_SUB_U(b, create_immed(b, 31), 0, dst[0], 0),
0, src[0], 0, dst[0], 0);
break;
case nir_op_find_lsb:
dst[0] = ir3_BFREV_B(b, src[0], 0);
dst[0] = ir3_CLZ_B(b, dst[0], 0);
break;
case nir_op_bitfield_reverse:
dst[0] = ir3_BFREV_B(b, src[0], 0);
break;
case nir_op_uadd_sat:
dst[0] = ir3_ADD_U(b, src[0], 0, src[1], 0);
dst[0]->flags |= IR3_INSTR_SAT;
break;
case nir_op_iadd_sat:
dst[0] = ir3_ADD_S(b, src[0], 0, src[1], 0);
dst[0]->flags |= IR3_INSTR_SAT;
break;
case nir_op_usub_sat:
dst[0] = ir3_SUB_U(b, src[0], 0, src[1], 0);
dst[0]->flags |= IR3_INSTR_SAT;
break;
case nir_op_isub_sat:
dst[0] = ir3_SUB_S(b, src[0], 0, src[1], 0);
dst[0]->flags |= IR3_INSTR_SAT;
break;
case nir_op_udot_4x8_uadd:
case nir_op_udot_4x8_uadd_sat:
case nir_op_sudot_4x8_iadd:
case nir_op_sudot_4x8_iadd_sat: {
if (ctx->compiler->has_dp4acc) {
emit_alu_dot_4x8_as_dp4acc(ctx, alu, dst, src);
} else if (ctx->compiler->has_dp2acc) {
emit_alu_dot_4x8_as_dp2acc(ctx, alu, dst, src);
} else {
ir3_context_error(ctx, "ALU op should have been lowered: %s\n",
nir_op_infos[alu->op].name);
}
break;
}
default:
ir3_context_error(ctx, "Unhandled ALU op: %s\n",
nir_op_infos[alu->op].name);
break;
}
if (nir_alu_type_get_base_type(info->output_type) == nir_type_bool) {
assert(nir_dest_bit_size(alu->dest.dest) == 1 || alu->op == nir_op_b2b32);
assert(dst_sz == 1);
} else {
/* 1-bit values stored in 32-bit registers are only valid for certain
* ALU ops.
*/
switch (alu->op) {
case nir_op_iand:
case nir_op_ior:
case nir_op_ixor:
case nir_op_inot:
case nir_op_bcsel:
break;
default:
compile_assert(ctx, nir_dest_bit_size(alu->dest.dest) != 1);
}
}
ir3_put_dst(ctx, &alu->dest.dest);
}
static void
emit_intrinsic_load_ubo_ldc(struct ir3_context *ctx, nir_intrinsic_instr *intr,
struct ir3_instruction **dst)
{
struct ir3_block *b = ctx->block;
/* This is only generated for us by nir_lower_ubo_vec4, which leaves base =
* 0.
*/
assert(nir_intrinsic_base(intr) == 0);
unsigned ncomp = intr->num_components;
struct ir3_instruction *offset = ir3_get_src(ctx, &intr->src[1])[0];
struct ir3_instruction *idx = ir3_get_src(ctx, &intr->src[0])[0];
struct ir3_instruction *ldc = ir3_LDC(b, idx, 0, offset, 0);
ldc->dsts[0]->wrmask = MASK(ncomp);
ldc->cat6.iim_val = ncomp;
ldc->cat6.d = nir_intrinsic_component(intr);
ldc->cat6.type = TYPE_U32;
ir3_handle_bindless_cat6(ldc, intr->src[0]);
if (ldc->flags & IR3_INSTR_B)
ctx->so->bindless_ubo = true;
ir3_handle_nonuniform(ldc, intr);
ir3_split_dest(b, dst, ldc, 0, ncomp);
}
static void
emit_intrinsic_copy_ubo_to_uniform(struct ir3_context *ctx,
nir_intrinsic_instr *intr)
{
struct ir3_block *b = ctx->block;
unsigned base = nir_intrinsic_base(intr);
unsigned size = nir_intrinsic_range(intr);
struct ir3_instruction *addr1 = ir3_get_addr1(ctx, base);
struct ir3_instruction *offset = ir3_get_src(ctx, &intr->src[1])[0];
struct ir3_instruction *idx = ir3_get_src(ctx, &intr->src[0])[0];
struct ir3_instruction *ldc = ir3_LDC_K(b, idx, 0, offset, 0);
ldc->cat6.iim_val = size;
ldc->barrier_class = ldc->barrier_conflict = IR3_BARRIER_CONST_W;
ir3_handle_bindless_cat6(ldc, intr->src[0]);
if (ldc->flags & IR3_INSTR_B)
ctx->so->bindless_ubo = true;
ir3_instr_set_address(ldc, addr1);
array_insert(b, b->keeps, ldc);
}
/* handles direct/indirect UBO reads: */
static void
emit_intrinsic_load_ubo(struct ir3_context *ctx, nir_intrinsic_instr *intr,
struct ir3_instruction **dst)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction *base_lo, *base_hi, *addr, *src0, *src1;
const struct ir3_const_state *const_state = ir3_const_state(ctx->so);
unsigned ubo = regid(const_state->offsets.ubo, 0);
const unsigned ptrsz = ir3_pointer_size(ctx->compiler);
int off = 0;
/* First src is ubo index, which could either be an immed or not: */
src0 = ir3_get_src(ctx, &intr->src[0])[0];
if (is_same_type_mov(src0) && (src0->srcs[0]->flags & IR3_REG_IMMED)) {
base_lo = create_uniform(b, ubo + (src0->srcs[0]->iim_val * ptrsz));
base_hi = create_uniform(b, ubo + (src0->srcs[0]->iim_val * ptrsz) + 1);
} else {
base_lo = create_uniform_indirect(b, ubo, TYPE_U32,
ir3_get_addr0(ctx, src0, ptrsz));
base_hi = create_uniform_indirect(b, ubo + 1, TYPE_U32,
ir3_get_addr0(ctx, src0, ptrsz));
/* NOTE: since relative addressing is used, make sure constlen is
* at least big enough to cover all the UBO addresses, since the
* assembler won't know what the max address reg is.
*/
ctx->so->constlen =
MAX2(ctx->so->constlen,
const_state->offsets.ubo + (ctx->s->info.num_ubos * ptrsz));
}
/* note: on 32bit gpu's base_hi is ignored and DCE'd */
addr = base_lo;
if (nir_src_is_const(intr->src[1])) {
off += nir_src_as_uint(intr->src[1]);
} else {
/* For load_ubo_indirect, second src is indirect offset: */
src1 = ir3_get_src(ctx, &intr->src[1])[0];
/* and add offset to addr: */
addr = ir3_ADD_S(b, addr, 0, src1, 0);
}
/* if offset is to large to encode in the ldg, split it out: */
if ((off + (intr->num_components * 4)) > 1024) {
/* split out the minimal amount to improve the odds that
* cp can fit the immediate in the add.s instruction:
*/
unsigned off2 = off + (intr->num_components * 4) - 1024;
addr = ir3_ADD_S(b, addr, 0, create_immed(b, off2), 0);
off -= off2;
}
if (ptrsz == 2) {
struct ir3_instruction *carry;
/* handle 32b rollover, ie:
* if (addr < base_lo)
* base_hi++
*/
carry = ir3_CMPS_U(b, addr, 0, base_lo, 0);
carry->cat2.condition = IR3_COND_LT;
base_hi = ir3_ADD_S(b, base_hi, 0, carry, 0);
addr = ir3_collect(b, addr, base_hi);
}
for (int i = 0; i < intr->num_components; i++) {
struct ir3_instruction *load =
ir3_LDG(b, addr, 0, create_immed(b, off + i * 4), 0,
create_immed(b, 1), 0); /* num components */
load->cat6.type = TYPE_U32;
dst[i] = load;
}
}
/* Load a kernel param: src[] = { address }. */
static void
emit_intrinsic_load_kernel_input(struct ir3_context *ctx,
nir_intrinsic_instr *intr,
struct ir3_instruction **dst)
{
const struct ir3_const_state *const_state = ir3_const_state(ctx->so);
struct ir3_block *b = ctx->block;
unsigned offset = nir_intrinsic_base(intr);
unsigned p = regid(const_state->offsets.kernel_params, 0);
struct ir3_instruction *src0 = ir3_get_src(ctx, &intr->src[0])[0];
if (is_same_type_mov(src0) && (src0->srcs[0]->flags & IR3_REG_IMMED)) {
offset += src0->srcs[0]->iim_val;
/* kernel param position is in bytes, but constant space is 32b registers: */
compile_assert(ctx, !(offset & 0x3));
dst[0] = create_uniform(b, p + (offset / 4));
} else {
/* kernel param position is in bytes, but constant space is 32b registers: */
compile_assert(ctx, !(offset & 0x3));
/* TODO we should probably be lowering this in nir, and also handling
* non-32b inputs.. Also we probably don't want to be using
* SP_MODE_CONTROL.CONSTANT_DEMOTION_ENABLE for KERNEL shaders..
*/
src0 = ir3_SHR_B(b, src0, 0, create_immed(b, 2), 0);
dst[0] = create_uniform_indirect(b, offset / 4, TYPE_U32,
ir3_get_addr0(ctx, src0, 1));
}
}
/* src[] = { block_index } */
static void
emit_intrinsic_ssbo_size(struct ir3_context *ctx, nir_intrinsic_instr *intr,
struct ir3_instruction **dst)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction *ibo = ir3_ssbo_to_ibo(ctx, intr->src[0]);
struct ir3_instruction *resinfo = ir3_RESINFO(b, ibo, 0);
resinfo->cat6.iim_val = 1;
resinfo->cat6.d = ctx->compiler->gen >= 6 ? 1 : 2;
resinfo->cat6.type = TYPE_U32;
resinfo->cat6.typed = false;
/* resinfo has no writemask and always writes out 3 components */
resinfo->dsts[0]->wrmask = MASK(3);
ir3_handle_bindless_cat6(resinfo, intr->src[0]);
ir3_handle_nonuniform(resinfo, intr);
if (ctx->compiler->gen >= 6) {
ir3_split_dest(b, dst, resinfo, 0, 1);
} else {
/* On a5xx, resinfo returns the low 16 bits of ssbo size in .x and the high 16 bits in .y */
struct ir3_instruction *resinfo_dst[2];
ir3_split_dest(b, resinfo_dst, resinfo, 0, 2);
*dst = ir3_ADD_U(b, ir3_SHL_B(b, resinfo_dst[1], 0, create_immed(b, 16), 0), 0, resinfo_dst[0], 0);
}
}
/* src[] = { offset }. const_index[] = { base } */
static void
emit_intrinsic_load_shared(struct ir3_context *ctx, nir_intrinsic_instr *intr,
struct ir3_instruction **dst)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction *ldl, *offset;
unsigned base;
offset = ir3_get_src(ctx, &intr->src[0])[0];
base = nir_intrinsic_base(intr);
ldl = ir3_LDL(b, offset, 0, create_immed(b, base), 0,
create_immed(b, intr->num_components), 0);
ldl->cat6.type = utype_dst(intr->dest);
ldl->dsts[0]->wrmask = MASK(intr->num_components);
ldl->barrier_class = IR3_BARRIER_SHARED_R;
ldl->barrier_conflict = IR3_BARRIER_SHARED_W;
ir3_split_dest(b, dst, ldl, 0, intr->num_components);
}
/* src[] = { value, offset }. const_index[] = { base, write_mask } */
static void
emit_intrinsic_store_shared(struct ir3_context *ctx, nir_intrinsic_instr *intr)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction *stl, *offset;
struct ir3_instruction *const *value;
unsigned base, wrmask, ncomp;
value = ir3_get_src(ctx, &intr->src[0]);
offset = ir3_get_src(ctx, &intr->src[1])[0];
base = nir_intrinsic_base(intr);
wrmask = nir_intrinsic_write_mask(intr);
ncomp = ffs(~wrmask) - 1;
assert(wrmask == BITFIELD_MASK(intr->num_components));
stl = ir3_STL(b, offset, 0, ir3_create_collect(b, value, ncomp), 0,
create_immed(b, ncomp), 0);
stl->cat6.dst_offset = base;
stl->cat6.type = utype_src(intr->src[0]);
stl->barrier_class = IR3_BARRIER_SHARED_W;
stl->barrier_conflict = IR3_BARRIER_SHARED_R | IR3_BARRIER_SHARED_W;
array_insert(b, b->keeps, stl);
}
/* src[] = { offset }. const_index[] = { base } */
static void
emit_intrinsic_load_shared_ir3(struct ir3_context *ctx,
nir_intrinsic_instr *intr,
struct ir3_instruction **dst)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction *load, *offset;
unsigned base;
offset = ir3_get_src(ctx, &intr->src[0])[0];
base = nir_intrinsic_base(intr);
load = ir3_LDLW(b, offset, 0, create_immed(b, base), 0,
create_immed(b, intr->num_components), 0);
/* for a650, use LDL for tess ctrl inputs: */
if (ctx->so->type == MESA_SHADER_TESS_CTRL && ctx->compiler->tess_use_shared)
load->opc = OPC_LDL;
load->cat6.type = utype_dst(intr->dest);
load->dsts[0]->wrmask = MASK(intr->num_components);
load->barrier_class = IR3_BARRIER_SHARED_R;
load->barrier_conflict = IR3_BARRIER_SHARED_W;
ir3_split_dest(b, dst, load, 0, intr->num_components);
}
/* src[] = { value, offset }. const_index[] = { base } */
static void
emit_intrinsic_store_shared_ir3(struct ir3_context *ctx,
nir_intrinsic_instr *intr)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction *store, *offset;
struct ir3_instruction *const *value;
value = ir3_get_src(ctx, &intr->src[0]);
offset = ir3_get_src(ctx, &intr->src[1])[0];
store = ir3_STLW(b, offset, 0,
ir3_create_collect(b, value, intr->num_components), 0,
create_immed(b, intr->num_components), 0);
/* for a650, use STL for vertex outputs used by tess ctrl shader: */
if (ctx->so->type == MESA_SHADER_VERTEX && ctx->so->key.tessellation &&
ctx->compiler->tess_use_shared)
store->opc = OPC_STL;
store->cat6.dst_offset = nir_intrinsic_base(intr);
store->cat6.type = utype_src(intr->src[0]);
store->barrier_class = IR3_BARRIER_SHARED_W;
store->barrier_conflict = IR3_BARRIER_SHARED_R | IR3_BARRIER_SHARED_W;
array_insert(b, b->keeps, store);
}
/*
* CS shared variable atomic intrinsics
*
* All of the shared variable atomic memory operations read a value from
* memory, compute a new value using one of the operations below, write the
* new value to memory, and return the original value read.
*
* All operations take 2 sources except CompSwap that takes 3. These
* sources represent:
*
* 0: The offset into the shared variable storage region that the atomic
* operation will operate on.
* 1: The data parameter to the atomic function (i.e. the value to add
* in shared_atomic_add, etc).
* 2: For CompSwap only: the second data parameter.
*/
static struct ir3_instruction *
emit_intrinsic_atomic_shared(struct ir3_context *ctx, nir_intrinsic_instr *intr)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction *atomic, *src0, *src1;
type_t type = TYPE_U32;
src0 = ir3_get_src(ctx, &intr->src[0])[0]; /* offset */
src1 = ir3_get_src(ctx, &intr->src[1])[0]; /* value */
switch (intr->intrinsic) {
case nir_intrinsic_shared_atomic_add:
atomic = ir3_ATOMIC_ADD(b, src0, 0, src1, 0);
break;
case nir_intrinsic_shared_atomic_imin:
atomic = ir3_ATOMIC_MIN(b, src0, 0, src1, 0);
type = TYPE_S32;
break;
case nir_intrinsic_shared_atomic_umin:
atomic = ir3_ATOMIC_MIN(b, src0, 0, src1, 0);
break;
case nir_intrinsic_shared_atomic_imax:
atomic = ir3_ATOMIC_MAX(b, src0, 0, src1, 0);
type = TYPE_S32;
break;
case nir_intrinsic_shared_atomic_umax:
atomic = ir3_ATOMIC_MAX(b, src0, 0, src1, 0);
break;
case nir_intrinsic_shared_atomic_and:
atomic = ir3_ATOMIC_AND(b, src0, 0, src1, 0);
break;
case nir_intrinsic_shared_atomic_or:
atomic = ir3_ATOMIC_OR(b, src0, 0, src1, 0);
break;
case nir_intrinsic_shared_atomic_xor:
atomic = ir3_ATOMIC_XOR(b, src0, 0, src1, 0);
break;
case nir_intrinsic_shared_atomic_exchange:
atomic = ir3_ATOMIC_XCHG(b, src0, 0, src1, 0);
break;
case nir_intrinsic_shared_atomic_comp_swap:
/* for cmpxchg, src1 is [ui]vec2(data, compare): */
src1 = ir3_collect(b, ir3_get_src(ctx, &intr->src[2])[0], src1);
atomic = ir3_ATOMIC_CMPXCHG(b, src0, 0, src1, 0);
break;
default:
unreachable("boo");
}
atomic->cat6.iim_val = 1;
atomic->cat6.d = 1;
atomic->cat6.type = type;
atomic->barrier_class = IR3_BARRIER_SHARED_W;
atomic->barrier_conflict = IR3_BARRIER_SHARED_R | IR3_BARRIER_SHARED_W;
/* even if nothing consume the result, we can't DCE the instruction: */
array_insert(b, b->keeps, atomic);
return atomic;
}
static void
stp_ldp_offset(struct ir3_context *ctx, nir_src *src,
struct ir3_instruction **offset, int32_t *base)
{
struct ir3_block *b = ctx->block;
if (nir_src_is_const(*src)) {
unsigned src_offset = nir_src_as_uint(*src);
/* The base offset field is only 13 bits, and it's signed. Try to make the
* offset constant whenever the original offsets are similar, to avoid
* creating too many constants in the final shader.
*/
*base = ((int32_t) src_offset << (32 - 13)) >> (32 - 13);
uint32_t offset_val = src_offset - *base;
*offset = create_immed(b, offset_val);
} else {
/* TODO: match on nir_iadd with a constant that fits */
*base = 0;
*offset = ir3_get_src(ctx, src)[0];
}
}
/* src[] = { offset }. */
static void
emit_intrinsic_load_scratch(struct ir3_context *ctx, nir_intrinsic_instr *intr,
struct ir3_instruction **dst)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction *ldp, *offset;
int32_t base;
stp_ldp_offset(ctx, &intr->src[0], &offset, &base);
ldp = ir3_LDP(b, offset, 0, create_immed(b, base), 0,
create_immed(b, intr->num_components), 0);
ldp->cat6.type = utype_dst(intr->dest);
ldp->dsts[0]->wrmask = MASK(intr->num_components);
ldp->barrier_class = IR3_BARRIER_PRIVATE_R;
ldp->barrier_conflict = IR3_BARRIER_PRIVATE_W;
ir3_split_dest(b, dst, ldp, 0, intr->num_components);
}
/* src[] = { value, offset }. const_index[] = { write_mask } */
static void
emit_intrinsic_store_scratch(struct ir3_context *ctx, nir_intrinsic_instr *intr)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction *stp, *offset;
struct ir3_instruction *const *value;
unsigned wrmask, ncomp;
int32_t base;
value = ir3_get_src(ctx, &intr->src[0]);
stp_ldp_offset(ctx, &intr->src[1], &offset, &base);
wrmask = nir_intrinsic_write_mask(intr);
ncomp = ffs(~wrmask) - 1;
assert(wrmask == BITFIELD_MASK(intr->num_components));
stp = ir3_STP(b, offset, 0, ir3_create_collect(b, value, ncomp), 0,
create_immed(b, ncomp), 0);
stp->cat6.dst_offset = base;
stp->cat6.type = utype_src(intr->src[0]);
stp->barrier_class = IR3_BARRIER_PRIVATE_W;
stp->barrier_conflict = IR3_BARRIER_PRIVATE_R | IR3_BARRIER_PRIVATE_W;
array_insert(b, b->keeps, stp);
}
struct tex_src_info {
/* For prefetch */
unsigned tex_base, samp_base, tex_idx, samp_idx;
/* For normal tex instructions */
unsigned base, a1_val, flags;
struct ir3_instruction *samp_tex;
};
/* TODO handle actual indirect/dynamic case.. which is going to be weird
* to handle with the image_mapping table..
*/
static struct tex_src_info
get_image_ssbo_samp_tex_src(struct ir3_context *ctx, nir_src *src)
{
struct ir3_block *b = ctx->block;
struct tex_src_info info = {0};
nir_intrinsic_instr *bindless_tex = ir3_bindless_resource(*src);
if (bindless_tex) {
/* Bindless case */
ctx->so->bindless_tex = true;
info.flags |= IR3_INSTR_B;
/* Gather information required to determine which encoding to
* choose as well as for prefetch.
*/
info.tex_base = nir_intrinsic_desc_set(bindless_tex);
bool tex_const = nir_src_is_const(bindless_tex->src[0]);
if (tex_const)
info.tex_idx = nir_src_as_uint(bindless_tex->src[0]);
info.samp_idx = 0;
/* Choose encoding. */
if (tex_const && info.tex_idx < 256) {
if (info.tex_idx < 16) {
/* Everything fits within the instruction */
info.base = info.tex_base;
} else {
info.base = info.tex_base;
info.a1_val = info.tex_idx << 3;
info.flags |= IR3_INSTR_A1EN;
}
info.samp_tex = NULL;
} else {
info.flags |= IR3_INSTR_S2EN;
info.base = info.tex_base;
/* Note: the indirect source is now a vec2 instead of hvec2 */
struct ir3_instruction *texture, *sampler;
texture = ir3_get_src(ctx, src)[0];
sampler = create_immed(b, 0);
info.samp_tex = ir3_collect(b, texture, sampler);
}
} else {
info.flags |= IR3_INSTR_S2EN;
unsigned slot = nir_src_as_uint(*src);
unsigned tex_idx = ir3_image_to_tex(&ctx->so->image_mapping, slot);
struct ir3_instruction *texture, *sampler;
texture = create_immed_typed(ctx->block, tex_idx, TYPE_U16);
sampler = create_immed_typed(ctx->block, tex_idx, TYPE_U16);
info.samp_tex = ir3_collect(b, sampler, texture);
}
return info;
}
static struct ir3_instruction *
emit_sam(struct ir3_context *ctx, opc_t opc, struct tex_src_info info,
type_t type, unsigned wrmask, struct ir3_instruction *src0,
struct ir3_instruction *src1)
{
struct ir3_instruction *sam, *addr;
if (info.flags & IR3_INSTR_A1EN) {
addr = ir3_get_addr1(ctx, info.a1_val);
}
sam = ir3_SAM(ctx->block, opc, type, wrmask, info.flags, info.samp_tex, src0,
src1);
if (info.flags & IR3_INSTR_A1EN) {
ir3_instr_set_address(sam, addr);
}
if (info.flags & IR3_INSTR_B) {
sam->cat5.tex_base = info.base;
sam->cat5.samp = info.samp_idx;
sam->cat5.tex = info.tex_idx;
}
return sam;
}
/* src[] = { deref, coord, sample_index }. const_index[] = {} */
static void
emit_intrinsic_load_image(struct ir3_context *ctx, nir_intrinsic_instr *intr,
struct ir3_instruction **dst)
{
/* If the image can be written, must use LDIB to retrieve data, rather than
* through ISAM (which uses the texture cache and won't get previous writes).
*/
if (!(nir_intrinsic_access(intr) & ACCESS_CAN_REORDER)) {
ctx->funcs->emit_intrinsic_load_image(ctx, intr, dst);
return;
}
/* The sparse set of texture descriptors for non-coherent load_images means we can't do indirection, so
* fall back to coherent load.
*/
if (ctx->compiler->gen >= 5 &&
!ir3_bindless_resource(intr->src[0]) &&
!nir_src_is_const(intr->src[0])) {
ctx->funcs->emit_intrinsic_load_image(ctx, intr, dst);
return;
}
struct ir3_block *b = ctx->block;
struct tex_src_info info = get_image_ssbo_samp_tex_src(ctx, &intr->src[0]);
struct ir3_instruction *sam;
struct ir3_instruction *const *src0 = ir3_get_src(ctx, &intr->src[1]);
struct ir3_instruction *coords[4];
unsigned flags, ncoords = ir3_get_image_coords(intr, &flags);
type_t type = ir3_get_type_for_image_intrinsic(intr);
info.flags |= flags;
/* hw doesn't do 1d, so we treat it as 2d with height of 1, and patch up the
* y coord. Note that the array index must come after the fake y coord.
*/
enum glsl_sampler_dim dim = nir_intrinsic_image_dim(intr);
if (dim == GLSL_SAMPLER_DIM_1D || dim == GLSL_SAMPLER_DIM_BUF) {
coords[0] = src0[0];
coords[1] = create_immed(b, 0);
for (unsigned i = 1; i < ncoords; i++)
coords[i + 1] = src0[i];
ncoords++;
} else {
for (unsigned i = 0; i < ncoords; i++)
coords[i] = src0[i];
}
sam = emit_sam(ctx, OPC_ISAM, info, type, 0b1111,
ir3_create_collect(b, coords, ncoords), NULL);
ir3_handle_nonuniform(sam, intr);
sam->barrier_class = IR3_BARRIER_IMAGE_R;
sam->barrier_conflict = IR3_BARRIER_IMAGE_W;
ir3_split_dest(b, dst, sam, 0, 4);
}
/* A4xx version of image_size, see ir3_a6xx.c for newer resinfo version. */
void
emit_intrinsic_image_size_tex(struct ir3_context *ctx,
nir_intrinsic_instr *intr,
struct ir3_instruction **dst)
{
struct ir3_block *b = ctx->block;
struct tex_src_info info = get_image_ssbo_samp_tex_src(ctx, &intr->src[0]);
struct ir3_instruction *sam, *lod;
unsigned flags, ncoords = ir3_get_image_coords(intr, &flags);
type_t dst_type = nir_dest_bit_size(intr->dest) == 16 ? TYPE_U16 : TYPE_U32;
info.flags |= flags;
assert(nir_src_as_uint(intr->src[1]) == 0);
lod = create_immed(b, 0);
sam = emit_sam(ctx, OPC_GETSIZE, info, dst_type, 0b1111, lod, NULL);
/* Array size actually ends up in .w rather than .z. This doesn't
* matter for miplevel 0, but for higher mips the value in z is
* minified whereas w stays. Also, the value in TEX_CONST_3_DEPTH is
* returned, which means that we have to add 1 to it for arrays for
* a3xx.
*
* Note use a temporary dst and then copy, since the size of the dst
* array that is passed in is based on nir's understanding of the
* result size, not the hardware's
*/
struct ir3_instruction *tmp[4];
ir3_split_dest(b, tmp, sam, 0, 4);
for (unsigned i = 0; i < ncoords; i++)
dst[i] = tmp[i];
if (flags & IR3_INSTR_A) {
if (ctx->compiler->levels_add_one) {
dst[ncoords - 1] = ir3_ADD_U(b, tmp[3], 0, create_immed(b, 1), 0);
} else {
dst[ncoords - 1] = ir3_MOV(b, tmp[3], TYPE_U32);
}
}
}
/* src[] = { buffer_index, offset }. No const_index */
static void
emit_intrinsic_load_ssbo(struct ir3_context *ctx,
nir_intrinsic_instr *intr,
struct ir3_instruction **dst)
{
/* Note: isam currently can't handle vectorized loads/stores */
if (!(nir_intrinsic_access(intr) & ACCESS_CAN_REORDER) ||
!ir3_bindless_resource(intr->src[0]) ||
intr->dest.ssa.num_components > 1) {
ctx->funcs->emit_intrinsic_load_ssbo(ctx, intr, dst);
return;
}
struct ir3_block *b = ctx->block;
struct ir3_instruction *offset = ir3_get_src(ctx, &intr->src[2])[0];
struct ir3_instruction *coords = ir3_collect(b, offset, create_immed(b, 0));
struct tex_src_info info = get_image_ssbo_samp_tex_src(ctx, &intr->src[0]);
unsigned num_components = intr->dest.ssa.num_components;
struct ir3_instruction *sam =
emit_sam(ctx, OPC_ISAM, info, utype_for_size(intr->dest.ssa.bit_size),
MASK(num_components), coords, NULL);
ir3_handle_nonuniform(sam, intr);
sam->barrier_class = IR3_BARRIER_BUFFER_R;
sam->barrier_conflict = IR3_BARRIER_BUFFER_W;
ir3_split_dest(b, dst, sam, 0, num_components);
}
static void
emit_control_barrier(struct ir3_context *ctx)
{
/* Hull shaders dispatch 32 wide so an entire patch will always
* fit in a single warp and execute in lock-step. Consequently,
* we don't need to do anything for TCS barriers. Emitting
* barrier instruction will deadlock.
*/
if (ctx->so->type == MESA_SHADER_TESS_CTRL)
return;
struct ir3_block *b = ctx->block;
struct ir3_instruction *barrier = ir3_BAR(b);
barrier->cat7.g = true;
if (ctx->compiler->gen < 6)
barrier->cat7.l = true;
barrier->flags = IR3_INSTR_SS | IR3_INSTR_SY;
barrier->barrier_class = IR3_BARRIER_EVERYTHING;
array_insert(b, b->keeps, barrier);
ctx->so->has_barrier = true;
}
static void
emit_intrinsic_barrier(struct ir3_context *ctx, nir_intrinsic_instr *intr)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction *barrier;
/* TODO: find out why there is a major difference of .l usage
* between a5xx and a6xx,
*/
switch (intr->intrinsic) {
case nir_intrinsic_control_barrier:
emit_control_barrier(ctx);
return;
case nir_intrinsic_scoped_barrier: {
nir_scope exec_scope = nir_intrinsic_execution_scope(intr);
nir_variable_mode modes = nir_intrinsic_memory_modes(intr);
/* loads/stores are always cache-coherent so we can filter out
* available/visible.
*/
nir_memory_semantics semantics =
nir_intrinsic_memory_semantics(intr) & (NIR_MEMORY_ACQUIRE |
NIR_MEMORY_RELEASE);
if (ctx->so->type == MESA_SHADER_TESS_CTRL) {
/* Remove mode corresponding to nir_intrinsic_memory_barrier_tcs_patch,
* because hull shaders dispatch 32 wide so an entire patch will
* always fit in a single warp and execute in lock-step.
*
* TODO: memory barrier also tells us not to reorder stores, this
* information is lost here (backend doesn't reorder stores so we
* are safe for now).
*/
modes &= ~nir_var_shader_out;
}
assert(!(modes & nir_var_shader_out));
if ((modes &
(nir_var_mem_shared | nir_var_mem_ssbo | nir_var_mem_global |
nir_var_image)) && semantics) {
barrier = ir3_FENCE(b);
barrier->cat7.r = true;
barrier->cat7.w = true;
if (modes & (nir_var_mem_ssbo | nir_var_image | nir_var_mem_global)) {
barrier->cat7.g = true;
}
if (ctx->compiler->gen >= 6) {
if (modes & (nir_var_mem_ssbo | nir_var_image)) {
barrier->cat7.l = true;
}
} else {
if (modes & (nir_var_mem_shared | nir_var_mem_ssbo | nir_var_image)) {
barrier->cat7.l = true;
}
}
barrier->barrier_class = 0;
barrier->barrier_conflict = 0;
if (modes & nir_var_mem_shared) {
barrier->barrier_class |= IR3_BARRIER_SHARED_W;
barrier->barrier_conflict |=
IR3_BARRIER_SHARED_R | IR3_BARRIER_SHARED_W;
}
if (modes & (nir_var_mem_ssbo | nir_var_mem_global)) {
barrier->barrier_class |= IR3_BARRIER_BUFFER_W;
barrier->barrier_conflict |=
IR3_BARRIER_BUFFER_R | IR3_BARRIER_BUFFER_W;
}
if (modes & nir_var_image) {
barrier->barrier_class |= IR3_BARRIER_IMAGE_W;
barrier->barrier_conflict |=
IR3_BARRIER_IMAGE_W | IR3_BARRIER_IMAGE_R;
}
array_insert(b, b->keeps, barrier);
}
if (exec_scope >= NIR_SCOPE_WORKGROUP) {
emit_control_barrier(ctx);
}
return;
}
case nir_intrinsic_memory_barrier_tcs_patch:
/* Not applicable, see explanation for scoped_barrier + shader_out */
return;
case nir_intrinsic_memory_barrier_buffer:
barrier = ir3_FENCE(b);
barrier->cat7.g = true;
if (ctx->compiler->gen >= 6)
barrier->cat7.l = true;
barrier->cat7.r = true;
barrier->cat7.w = true;
barrier->barrier_class = IR3_BARRIER_BUFFER_W;
barrier->barrier_conflict = IR3_BARRIER_BUFFER_R | IR3_BARRIER_BUFFER_W;
break;
case nir_intrinsic_memory_barrier_image:
barrier = ir3_FENCE(b);
barrier->cat7.g = true;
barrier->cat7.l = true;
barrier->cat7.r = true;
barrier->cat7.w = true;
barrier->barrier_class = IR3_BARRIER_IMAGE_W;
barrier->barrier_conflict = IR3_BARRIER_IMAGE_R | IR3_BARRIER_IMAGE_W;
break;
case nir_intrinsic_memory_barrier_shared:
barrier = ir3_FENCE(b);
if (ctx->compiler->gen < 6)
barrier->cat7.l = true;
barrier->cat7.r = true;
barrier->cat7.w = true;
barrier->barrier_class = IR3_BARRIER_SHARED_W;
barrier->barrier_conflict = IR3_BARRIER_SHARED_R | IR3_BARRIER_SHARED_W;
break;
case nir_intrinsic_memory_barrier:
case nir_intrinsic_group_memory_barrier:
barrier = ir3_FENCE(b);
barrier->cat7.g = true;
barrier->cat7.l = true;
barrier->cat7.r = true;
barrier->cat7.w = true;
barrier->barrier_class =
IR3_BARRIER_SHARED_W | IR3_BARRIER_IMAGE_W | IR3_BARRIER_BUFFER_W;
barrier->barrier_conflict = IR3_BARRIER_SHARED_R | IR3_BARRIER_SHARED_W |
IR3_BARRIER_IMAGE_R | IR3_BARRIER_IMAGE_W |
IR3_BARRIER_BUFFER_R | IR3_BARRIER_BUFFER_W;
break;
default:
unreachable("boo");
}
/* make sure barrier doesn't get DCE'd */
array_insert(b, b->keeps, barrier);
}
static void
add_sysval_input_compmask(struct ir3_context *ctx, gl_system_value slot,
unsigned compmask, struct ir3_instruction *instr)
{
struct ir3_shader_variant *so = ctx->so;
unsigned n = so->inputs_count++;
assert(instr->opc == OPC_META_INPUT);
instr->input.inidx = n;
instr->input.sysval = slot;
so->inputs[n].sysval = true;
so->inputs[n].slot = slot;
so->inputs[n].compmask = compmask;
so->total_in++;
so->sysval_in += util_last_bit(compmask);
}
static struct ir3_instruction *
create_sysval_input(struct ir3_context *ctx, gl_system_value slot,
unsigned compmask)
{
assert(compmask);
struct ir3_instruction *sysval = create_input(ctx, compmask);
add_sysval_input_compmask(ctx, slot, compmask, sysval);
return sysval;
}
static struct ir3_instruction *
get_barycentric(struct ir3_context *ctx, enum ir3_bary bary)
{
STATIC_ASSERT(SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL + IJ_PERSP_PIXEL ==
SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL);
STATIC_ASSERT(SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL + IJ_PERSP_SAMPLE ==
SYSTEM_VALUE_BARYCENTRIC_PERSP_SAMPLE);
STATIC_ASSERT(SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL + IJ_PERSP_CENTROID ==
SYSTEM_VALUE_BARYCENTRIC_PERSP_CENTROID);
STATIC_ASSERT(SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL + IJ_PERSP_CENTER_RHW ==
SYSTEM_VALUE_BARYCENTRIC_PERSP_CENTER_RHW);
STATIC_ASSERT(SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL + IJ_LINEAR_PIXEL ==
SYSTEM_VALUE_BARYCENTRIC_LINEAR_PIXEL);
STATIC_ASSERT(SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL + IJ_LINEAR_CENTROID ==
SYSTEM_VALUE_BARYCENTRIC_LINEAR_CENTROID);
STATIC_ASSERT(SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL + IJ_LINEAR_SAMPLE ==
SYSTEM_VALUE_BARYCENTRIC_LINEAR_SAMPLE);
if (!ctx->ij[bary]) {
struct ir3_instruction *xy[2];
struct ir3_instruction *ij;
ij = create_sysval_input(ctx, SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL +
bary, 0x3);
ir3_split_dest(ctx->in_block, xy, ij, 0, 2);
ctx->ij[bary] = ir3_create_collect(ctx->in_block, xy, 2);
}
return ctx->ij[bary];
}
/* TODO: make this a common NIR helper?
* there is a nir_system_value_from_intrinsic but it takes nir_intrinsic_op so
* it can't be extended to work with this
*/
static gl_system_value
nir_intrinsic_barycentric_sysval(nir_intrinsic_instr *intr)
{
enum glsl_interp_mode interp_mode = nir_intrinsic_interp_mode(intr);
gl_system_value sysval;
switch (intr->intrinsic) {
case nir_intrinsic_load_barycentric_pixel:
if (interp_mode == INTERP_MODE_NOPERSPECTIVE)
sysval = SYSTEM_VALUE_BARYCENTRIC_LINEAR_PIXEL;
else
sysval = SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL;
break;
case nir_intrinsic_load_barycentric_centroid:
if (interp_mode == INTERP_MODE_NOPERSPECTIVE)
sysval = SYSTEM_VALUE_BARYCENTRIC_LINEAR_CENTROID;
else
sysval = SYSTEM_VALUE_BARYCENTRIC_PERSP_CENTROID;
break;
case nir_intrinsic_load_barycentric_sample:
if (interp_mode == INTERP_MODE_NOPERSPECTIVE)
sysval = SYSTEM_VALUE_BARYCENTRIC_LINEAR_SAMPLE;
else
sysval = SYSTEM_VALUE_BARYCENTRIC_PERSP_SAMPLE;
break;
default:
unreachable("invalid barycentric intrinsic");
}
return sysval;
}
static void
emit_intrinsic_barycentric(struct ir3_context *ctx, nir_intrinsic_instr *intr,
struct ir3_instruction **dst)
{
gl_system_value sysval = nir_intrinsic_barycentric_sysval(intr);
if (!ctx->so->key.msaa) {
switch (sysval) {
case SYSTEM_VALUE_BARYCENTRIC_PERSP_SAMPLE:
sysval = SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL;
break;
case SYSTEM_VALUE_BARYCENTRIC_PERSP_CENTROID:
if (ctx->compiler->gen < 6)
sysval = SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL;
break;
case SYSTEM_VALUE_BARYCENTRIC_LINEAR_SAMPLE:
sysval = SYSTEM_VALUE_BARYCENTRIC_LINEAR_PIXEL;
break;
case SYSTEM_VALUE_BARYCENTRIC_LINEAR_CENTROID:
if (ctx->compiler->gen < 6)
sysval = SYSTEM_VALUE_BARYCENTRIC_LINEAR_PIXEL;
break;
default:
break;
}
}
enum ir3_bary bary = sysval - SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL;
struct ir3_instruction *ij = get_barycentric(ctx, bary);
ir3_split_dest(ctx->block, dst, ij, 0, 2);
}
static struct ir3_instruction *
get_frag_coord(struct ir3_context *ctx, nir_intrinsic_instr *intr)
{
if (!ctx->frag_coord) {
struct ir3_block *b = ir3_after_preamble(ctx->ir);
struct ir3_instruction *xyzw[4];
struct ir3_instruction *hw_frag_coord;
hw_frag_coord = create_sysval_input(ctx, SYSTEM_VALUE_FRAG_COORD, 0xf);
ir3_split_dest(b, xyzw, hw_frag_coord, 0, 4);
/* for frag_coord.xy, we get unsigned values.. we need
* to subtract (integer) 8 and divide by 16 (right-
* shift by 4) then convert to float:
*
* sub.s tmp, src, 8
* shr.b tmp, tmp, 4
* mov.u32f32 dst, tmp
*
*/
for (int i = 0; i < 2; i++) {
xyzw[i] = ir3_COV(b, xyzw[i], TYPE_U32, TYPE_F32);
xyzw[i] =
ir3_MUL_F(b, xyzw[i], 0, create_immed(b, fui(1.0 / 16.0)), 0);
}
ctx->frag_coord = ir3_create_collect(b, xyzw, 4);
}
ctx->so->fragcoord_compmask |= nir_ssa_def_components_read(&intr->dest.ssa);
return ctx->frag_coord;
}
/* This is a bit of a hack until ir3_context is converted to store SSA values
* as ir3_register's instead of ir3_instruction's. Pick out a given destination
* of an instruction with multiple destinations using a mov that will get folded
* away by ir3_cp.
*/
static struct ir3_instruction *
create_multidst_mov(struct ir3_block *block, struct ir3_register *dst)
{
struct ir3_instruction *mov = ir3_instr_create(block, OPC_MOV, 1, 1);
unsigned dst_flags = dst->flags & IR3_REG_HALF;
unsigned src_flags = dst->flags & (IR3_REG_HALF | IR3_REG_SHARED);
__ssa_dst(mov)->flags |= dst_flags;
struct ir3_register *src =
ir3_src_create(mov, INVALID_REG, IR3_REG_SSA | src_flags);
src->wrmask = dst->wrmask;
src->def = dst;
assert(!(dst->flags & IR3_REG_RELATIV));
mov->cat1.src_type = mov->cat1.dst_type =
(dst->flags & IR3_REG_HALF) ? TYPE_U16 : TYPE_U32;
return mov;
}
static reduce_op_t
get_reduce_op(nir_op opc)
{
switch (opc) {
case nir_op_iadd: return REDUCE_OP_ADD_U;
case nir_op_fadd: return REDUCE_OP_ADD_F;
case nir_op_imul: return REDUCE_OP_MUL_U;
case nir_op_fmul: return REDUCE_OP_MUL_F;
case nir_op_umin: return REDUCE_OP_MIN_U;
case nir_op_imin: return REDUCE_OP_MIN_S;
case nir_op_fmin: return REDUCE_OP_MIN_F;
case nir_op_umax: return REDUCE_OP_MAX_U;
case nir_op_imax: return REDUCE_OP_MAX_S;
case nir_op_fmax: return REDUCE_OP_MAX_F;
case nir_op_iand: return REDUCE_OP_AND_B;
case nir_op_ior: return REDUCE_OP_OR_B;
case nir_op_ixor: return REDUCE_OP_XOR_B;
default:
unreachable("unknown NIR reduce op");
}
}
static uint32_t
get_reduce_identity(nir_op opc, unsigned size)
{
switch (opc) {
case nir_op_iadd:
return 0;
case nir_op_fadd:
return size == 32 ? fui(0.0f) : _mesa_float_to_half(0.0f);
case nir_op_imul:
return 1;
case nir_op_fmul:
return size == 32 ? fui(1.0f) : _mesa_float_to_half(1.0f);
case nir_op_umax:
return 0;
case nir_op_imax:
return size == 32 ? INT32_MIN : (uint32_t)INT16_MIN;
case nir_op_fmax:
return size == 32 ? fui(-INFINITY) : _mesa_float_to_half(-INFINITY);
case nir_op_umin:
return size == 32 ? UINT32_MAX : UINT16_MAX;
case nir_op_imin:
return size == 32 ? INT32_MAX : (uint32_t)INT16_MAX;
case nir_op_fmin:
return size == 32 ? fui(INFINITY) : _mesa_float_to_half(INFINITY);
case nir_op_iand:
return size == 32 ? ~0 : (size == 16 ? (uint32_t)(uint16_t)~0 : 1);
case nir_op_ior:
return 0;
case nir_op_ixor:
return 0;
default:
unreachable("unknown NIR reduce op");
}
}
static struct ir3_instruction *
emit_intrinsic_reduce(struct ir3_context *ctx, nir_intrinsic_instr *intr)
{
struct ir3_instruction *src = ir3_get_src(ctx, &intr->src[0])[0];
nir_op nir_reduce_op = (nir_op) nir_intrinsic_reduction_op(intr);
reduce_op_t reduce_op = get_reduce_op(nir_reduce_op);
unsigned dst_size = nir_dest_bit_size(intr->dest);
unsigned flags = (ir3_bitsize(ctx, dst_size) == 16) ? IR3_REG_HALF : 0;
/* Note: the shared reg is initialized to the identity, so we need it to
* always be 32-bit even when the source isn't because half shared regs are
* not supported.
*/
struct ir3_instruction *identity =
create_immed(ctx->block, get_reduce_identity(nir_reduce_op, dst_size));
identity = ir3_READ_FIRST_MACRO(ctx->block, identity, 0);
identity->dsts[0]->flags |= IR3_REG_SHARED;
/* OPC_SCAN_MACRO has the following destinations:
* - Exclusive scan result (interferes with source)
* - Inclusive scan result
* - Shared reg reduction result, must be initialized to the identity
*
* The loop computes all three results at the same time, we just have to
* choose which destination to return.
*/
struct ir3_instruction *scan =
ir3_instr_create(ctx->block, OPC_SCAN_MACRO, 3, 2);
scan->cat1.reduce_op = reduce_op;
struct ir3_register *exclusive = __ssa_dst(scan);
exclusive->flags |= flags | IR3_REG_EARLY_CLOBBER;
struct ir3_register *inclusive = __ssa_dst(scan);
inclusive->flags |= flags;
struct ir3_register *reduce = __ssa_dst(scan);
reduce->flags |= IR3_REG_SHARED;
/* The 32-bit multiply macro reads its sources after writing a partial result
* to the destination, therefore inclusive also interferes with the source.
*/
if (reduce_op == REDUCE_OP_MUL_U && dst_size == 32)
inclusive->flags |= IR3_REG_EARLY_CLOBBER;
/* Normal source */
__ssa_src(scan, src, 0);
/* shared reg tied source */
struct ir3_register *reduce_init = __ssa_src(scan, identity, IR3_REG_SHARED);
ir3_reg_tie(reduce, reduce_init);
struct ir3_register *dst;
switch (intr->intrinsic) {
case nir_intrinsic_reduce: dst = reduce; break;
case nir_intrinsic_inclusive_scan: dst = inclusive; break;
case nir_intrinsic_exclusive_scan: dst = exclusive; break;
default:
unreachable("unknown reduce intrinsic");
}
return create_multidst_mov(ctx->block, dst);
}
static void setup_input(struct ir3_context *ctx, nir_intrinsic_instr *intr);
static void setup_output(struct ir3_context *ctx, nir_intrinsic_instr *intr);
static void
emit_intrinsic(struct ir3_context *ctx, nir_intrinsic_instr *intr)
{
const nir_intrinsic_info *info = &nir_intrinsic_infos[intr->intrinsic];
struct ir3_instruction **dst;
struct ir3_instruction *const *src;
struct ir3_block *b = ctx->block;
unsigned dest_components = nir_intrinsic_dest_components(intr);
int idx;
if (info->has_dest) {
dst = ir3_get_dst(ctx, &intr->dest, dest_components);
} else {
dst = NULL;
}
const struct ir3_const_state *const_state = ir3_const_state(ctx->so);
const unsigned primitive_param = const_state->offsets.primitive_param * 4;
const unsigned primitive_map = const_state->offsets.primitive_map * 4;
switch (intr->intrinsic) {
case nir_intrinsic_load_uniform:
idx = nir_intrinsic_base(intr);
if (nir_src_is_const(intr->src[0])) {
idx += nir_src_as_uint(intr->src[0]);
for (int i = 0; i < dest_components; i++) {
dst[i] = create_uniform_typed(
b, idx + i,
nir_dest_bit_size(intr->dest) == 16 ? TYPE_F16 : TYPE_F32);
}
} else {
src = ir3_get_src(ctx, &intr->src[0]);
for (int i = 0; i < dest_components; i++) {
dst[i] = create_uniform_indirect(
b, idx + i,
nir_dest_bit_size(intr->dest) == 16 ? TYPE_F16 : TYPE_F32,
ir3_get_addr0(ctx, src[0], 1));
}
/* NOTE: if relative addressing is used, we set
* constlen in the compiler (to worst-case value)
* since we don't know in the assembler what the max
* addr reg value can be:
*/
ctx->so->constlen =
MAX2(ctx->so->constlen,
ctx->so->num_reserved_user_consts +
const_state->ubo_state.size / 16);
}
break;
case nir_intrinsic_load_vs_primitive_stride_ir3:
dst[0] = create_uniform(b, primitive_param + 0);
break;
case nir_intrinsic_load_vs_vertex_stride_ir3:
dst[0] = create_uniform(b, primitive_param + 1);
break;
case nir_intrinsic_load_hs_patch_stride_ir3:
dst[0] = create_uniform(b, primitive_param + 2);
break;
case nir_intrinsic_load_patch_vertices_in:
dst[0] = create_uniform(b, primitive_param + 3);
break;
case nir_intrinsic_load_tess_param_base_ir3:
dst[0] = create_uniform(b, primitive_param + 4);
dst[1] = create_uniform(b, primitive_param + 5);
break;
case nir_intrinsic_load_tess_factor_base_ir3:
dst[0] = create_uniform(b, primitive_param + 6);
dst[1] = create_uniform(b, primitive_param + 7);
break;
case nir_intrinsic_load_primitive_location_ir3:
idx = nir_intrinsic_driver_location(intr);
dst[0] = create_uniform(b, primitive_map + idx);
break;
case nir_intrinsic_load_gs_header_ir3:
dst[0] = ctx->gs_header;
break;
case nir_intrinsic_load_tcs_header_ir3:
dst[0] = ctx->tcs_header;
break;
case nir_intrinsic_load_rel_patch_id_ir3:
dst[0] = ctx->rel_patch_id;
break;
case nir_intrinsic_load_primitive_id:
if (!ctx->primitive_id) {
ctx->primitive_id =
create_sysval_input(ctx, SYSTEM_VALUE_PRIMITIVE_ID, 0x1);
}
dst[0] = ctx->primitive_id;
break;
case nir_intrinsic_load_tess_coord:
if (!ctx->tess_coord) {
ctx->tess_coord =
create_sysval_input(ctx, SYSTEM_VALUE_TESS_COORD, 0x3);
}
ir3_split_dest(b, dst, ctx->tess_coord, 0, 2);
/* Unused, but ir3_put_dst() below wants to free something */
dst[2] = create_immed(b, 0);
break;
case nir_intrinsic_end_patch_ir3:
assert(ctx->so->type == MESA_SHADER_TESS_CTRL);
struct ir3_instruction *end = ir3_PREDE(b);
array_insert(b, b->keeps, end);
end->barrier_class = IR3_BARRIER_EVERYTHING;
end->barrier_conflict = IR3_BARRIER_EVERYTHING;
break;
case nir_intrinsic_store_global_ir3:
ctx->funcs->emit_intrinsic_store_global_ir3(ctx, intr);
break;
case nir_intrinsic_load_global_ir3:
ctx->funcs->emit_intrinsic_load_global_ir3(ctx, intr, dst);
break;
case nir_intrinsic_load_ubo:
emit_intrinsic_load_ubo(ctx, intr, dst);
break;
case nir_intrinsic_load_ubo_vec4:
emit_intrinsic_load_ubo_ldc(ctx, intr, dst);
break;
case nir_intrinsic_copy_ubo_to_uniform_ir3:
emit_intrinsic_copy_ubo_to_uniform(ctx, intr);
break;
case nir_intrinsic_load_frag_coord:
ir3_split_dest(b, dst, get_frag_coord(ctx, intr), 0, 4);
break;
case nir_intrinsic_load_sample_pos_from_id: {
/* NOTE: blob seems to always use TYPE_F16 and then cov.f16f32,
* but that doesn't seem necessary.
*/
struct ir3_instruction *offset =
ir3_RGETPOS(b, ir3_get_src(ctx, &intr->src[0])[0], 0);
offset->dsts[0]->wrmask = 0x3;
offset->cat5.type = TYPE_F32;
ir3_split_dest(b, dst, offset, 0, 2);
break;
}
case nir_intrinsic_load_persp_center_rhw_ir3:
if (!ctx->ij[IJ_PERSP_CENTER_RHW]) {
ctx->ij[IJ_PERSP_CENTER_RHW] =
create_sysval_input(ctx, SYSTEM_VALUE_BARYCENTRIC_PERSP_CENTER_RHW, 0x1);
}
dst[0] = ctx->ij[IJ_PERSP_CENTER_RHW];
break;
case nir_intrinsic_load_barycentric_centroid:
case nir_intrinsic_load_barycentric_sample:
case nir_intrinsic_load_barycentric_pixel:
emit_intrinsic_barycentric(ctx, intr, dst);
break;
case nir_intrinsic_load_interpolated_input:
case nir_intrinsic_load_input:
setup_input(ctx, intr);
break;
case nir_intrinsic_load_kernel_input:
emit_intrinsic_load_kernel_input(ctx, intr, dst);
break;
/* All SSBO intrinsics should have been lowered by 'lower_io_offsets'
* pass and replaced by an ir3-specifc version that adds the
* dword-offset in the last source.
*/
case nir_intrinsic_load_ssbo_ir3:
emit_intrinsic_load_ssbo(ctx, intr, dst);
break;
case nir_intrinsic_store_ssbo_ir3:
ctx->funcs->emit_intrinsic_store_ssbo(ctx, intr);
break;
case nir_intrinsic_get_ssbo_size:
emit_intrinsic_ssbo_size(ctx, intr, dst);
break;
case nir_intrinsic_ssbo_atomic_add_ir3:
case nir_intrinsic_ssbo_atomic_imin_ir3:
case nir_intrinsic_ssbo_atomic_umin_ir3:
case nir_intrinsic_ssbo_atomic_imax_ir3:
case nir_intrinsic_ssbo_atomic_umax_ir3:
case nir_intrinsic_ssbo_atomic_and_ir3:
case nir_intrinsic_ssbo_atomic_or_ir3:
case nir_intrinsic_ssbo_atomic_xor_ir3:
case nir_intrinsic_ssbo_atomic_exchange_ir3:
case nir_intrinsic_ssbo_atomic_comp_swap_ir3:
dst[0] = ctx->funcs->emit_intrinsic_atomic_ssbo(ctx, intr);
break;
case nir_intrinsic_load_shared:
emit_intrinsic_load_shared(ctx, intr, dst);
break;
case nir_intrinsic_store_shared:
emit_intrinsic_store_shared(ctx, intr);
break;
case nir_intrinsic_shared_atomic_add:
case nir_intrinsic_shared_atomic_imin:
case nir_intrinsic_shared_atomic_umin:
case nir_intrinsic_shared_atomic_imax:
case nir_intrinsic_shared_atomic_umax:
case nir_intrinsic_shared_atomic_and:
case nir_intrinsic_shared_atomic_or:
case nir_intrinsic_shared_atomic_xor:
case nir_intrinsic_shared_atomic_exchange:
case nir_intrinsic_shared_atomic_comp_swap:
dst[0] = emit_intrinsic_atomic_shared(ctx, intr);
break;
case nir_intrinsic_load_scratch:
emit_intrinsic_load_scratch(ctx, intr, dst);
break;
case nir_intrinsic_store_scratch:
emit_intrinsic_store_scratch(ctx, intr);
break;
case nir_intrinsic_image_load:
case nir_intrinsic_bindless_image_load:
emit_intrinsic_load_image(ctx, intr, dst);
break;
case nir_intrinsic_image_store:
case nir_intrinsic_bindless_image_store:
ctx->funcs->emit_intrinsic_store_image(ctx, intr);
break;
case nir_intrinsic_image_size:
case nir_intrinsic_bindless_image_size:
ctx->funcs->emit_intrinsic_image_size(ctx, intr, dst);
break;
case nir_intrinsic_image_atomic_add:
case nir_intrinsic_bindless_image_atomic_add:
case nir_intrinsic_image_atomic_imin:
case nir_intrinsic_bindless_image_atomic_imin:
case nir_intrinsic_image_atomic_umin:
case nir_intrinsic_bindless_image_atomic_umin:
case nir_intrinsic_image_atomic_imax:
case nir_intrinsic_bindless_image_atomic_imax:
case nir_intrinsic_image_atomic_umax:
case nir_intrinsic_bindless_image_atomic_umax:
case nir_intrinsic_image_atomic_and:
case nir_intrinsic_bindless_image_atomic_and:
case nir_intrinsic_image_atomic_or:
case nir_intrinsic_bindless_image_atomic_or:
case nir_intrinsic_image_atomic_xor:
case nir_intrinsic_bindless_image_atomic_xor:
case nir_intrinsic_image_atomic_exchange:
case nir_intrinsic_bindless_image_atomic_exchange:
case nir_intrinsic_image_atomic_comp_swap:
case nir_intrinsic_bindless_image_atomic_comp_swap:
dst[0] = ctx->funcs->emit_intrinsic_atomic_image(ctx, intr);
break;
case nir_intrinsic_scoped_barrier:
case nir_intrinsic_control_barrier:
case nir_intrinsic_memory_barrier:
case nir_intrinsic_group_memory_barrier:
case nir_intrinsic_memory_barrier_buffer:
case nir_intrinsic_memory_barrier_image:
case nir_intrinsic_memory_barrier_shared:
case nir_intrinsic_memory_barrier_tcs_patch:
emit_intrinsic_barrier(ctx, intr);
/* note that blk ptr no longer valid, make that obvious: */
b = NULL;
break;
case nir_intrinsic_store_output:
setup_output(ctx, intr);
break;
case nir_intrinsic_load_base_vertex:
case nir_intrinsic_load_first_vertex:
if (!ctx->basevertex) {
ctx->basevertex = create_driver_param(ctx, IR3_DP_VTXID_BASE);
}
dst[0] = ctx->basevertex;
break;
case nir_intrinsic_load_draw_id:
if (!ctx->draw_id) {
ctx->draw_id = create_driver_param(ctx, IR3_DP_DRAWID);
}
dst[0] = ctx->draw_id;
break;
case nir_intrinsic_load_base_instance:
if (!ctx->base_instance) {
ctx->base_instance = create_driver_param(ctx, IR3_DP_INSTID_BASE);
}
dst[0] = ctx->base_instance;
break;
case nir_intrinsic_load_view_index:
if (!ctx->view_index) {
ctx->view_index =
create_sysval_input(ctx, SYSTEM_VALUE_VIEW_INDEX, 0x1);
}
dst[0] = ctx->view_index;
break;
case nir_intrinsic_load_vertex_id_zero_base:
case nir_intrinsic_load_vertex_id:
if (!ctx->vertex_id) {
gl_system_value sv = (intr->intrinsic == nir_intrinsic_load_vertex_id)
? SYSTEM_VALUE_VERTEX_ID
: SYSTEM_VALUE_VERTEX_ID_ZERO_BASE;
ctx->vertex_id = create_sysval_input(ctx, sv, 0x1);
}
dst[0] = ctx->vertex_id;
break;
case nir_intrinsic_load_instance_id:
if (!ctx->instance_id) {
ctx->instance_id =
create_sysval_input(ctx, SYSTEM_VALUE_INSTANCE_ID, 0x1);
}
dst[0] = ctx->instance_id;
break;
case nir_intrinsic_load_sample_id:
ctx->so->per_samp = true;
FALLTHROUGH;
case nir_intrinsic_load_sample_id_no_per_sample:
if (!ctx->samp_id) {
ctx->samp_id = create_sysval_input(ctx, SYSTEM_VALUE_SAMPLE_ID, 0x1);
ctx->samp_id->dsts[0]->flags |= IR3_REG_HALF;
}
dst[0] = ir3_COV(b, ctx->samp_id, TYPE_U16, TYPE_U32);
break;
case nir_intrinsic_load_sample_mask_in:
if (!ctx->samp_mask_in) {
ctx->samp_mask_in =
create_sysval_input(ctx, SYSTEM_VALUE_SAMPLE_MASK_IN, 0x1);
}
dst[0] = ctx->samp_mask_in;
break;
case nir_intrinsic_load_user_clip_plane:
idx = nir_intrinsic_ucp_id(intr);
for (int i = 0; i < dest_components; i++) {
unsigned n = idx * 4 + i;
dst[i] = create_driver_param(ctx, IR3_DP_UCP0_X + n);
}
break;
case nir_intrinsic_load_front_face:
if (!ctx->frag_face) {
ctx->so->frag_face = true;
ctx->frag_face =
create_sysval_input(ctx, SYSTEM_VALUE_FRONT_FACE, 0x1);
ctx->frag_face->dsts[0]->flags |= IR3_REG_HALF;
}
/* for fragface, we get -1 for back and 0 for front. However this is
* the inverse of what nir expects (where ~0 is true).
*/
dst[0] = ir3_CMPS_S(b, ctx->frag_face, 0,
create_immed_typed(b, 0, TYPE_U16), 0);
dst[0]->cat2.condition = IR3_COND_EQ;
break;
case nir_intrinsic_load_local_invocation_id:
if (!ctx->local_invocation_id) {
ctx->local_invocation_id =
create_sysval_input(ctx, SYSTEM_VALUE_LOCAL_INVOCATION_ID, 0x7);
}
ir3_split_dest(b, dst, ctx->local_invocation_id, 0, 3);
break;
case nir_intrinsic_load_workgroup_id:
case nir_intrinsic_load_workgroup_id_zero_base:
if (ctx->compiler->has_shared_regfile) {
if (!ctx->work_group_id) {
ctx->work_group_id =
create_sysval_input(ctx, SYSTEM_VALUE_WORKGROUP_ID, 0x7);
ctx->work_group_id->dsts[0]->flags |= IR3_REG_SHARED;
}
ir3_split_dest(b, dst, ctx->work_group_id, 0, 3);
} else {
/* For a3xx/a4xx, this comes in via const injection by the hw */
for (int i = 0; i < dest_components; i++) {
dst[i] = create_driver_param(ctx, IR3_DP_WORKGROUP_ID_X + i);
}
}
break;
case nir_intrinsic_load_base_workgroup_id:
for (int i = 0; i < dest_components; i++) {
dst[i] = create_driver_param(ctx, IR3_DP_BASE_GROUP_X + i);
}
break;
case nir_intrinsic_load_num_workgroups:
for (int i = 0; i < dest_components; i++) {
dst[i] = create_driver_param(ctx, IR3_DP_NUM_WORK_GROUPS_X + i);
}
break;
case nir_intrinsic_load_workgroup_size:
for (int i = 0; i < dest_components; i++) {
dst[i] = create_driver_param(ctx, IR3_DP_LOCAL_GROUP_SIZE_X + i);
}
break;
case nir_intrinsic_load_subgroup_size: {
assert(ctx->so->type == MESA_SHADER_COMPUTE ||
ctx->so->type == MESA_SHADER_FRAGMENT);
enum ir3_driver_param size = ctx->so->type == MESA_SHADER_COMPUTE ?
IR3_DP_CS_SUBGROUP_SIZE : IR3_DP_FS_SUBGROUP_SIZE;
dst[0] = create_driver_param(ctx, size);
break;
}
case nir_intrinsic_load_subgroup_id_shift_ir3:
dst[0] = create_driver_param(ctx, IR3_DP_SUBGROUP_ID_SHIFT);
break;
case nir_intrinsic_load_work_dim:
dst[0] = create_driver_param(ctx, IR3_DP_WORK_DIM);
break;
case nir_intrinsic_load_subgroup_invocation:
assert(ctx->compiler->has_getfiberid);
dst[0] = ir3_GETFIBERID(b);
dst[0]->cat6.type = TYPE_U32;
__ssa_dst(dst[0]);
break;
case nir_intrinsic_discard_if:
case nir_intrinsic_discard:
case nir_intrinsic_demote:
case nir_intrinsic_demote_if:
case nir_intrinsic_terminate:
case nir_intrinsic_terminate_if: {
struct ir3_instruction *cond, *kill;
if (intr->intrinsic == nir_intrinsic_discard_if ||
intr->intrinsic == nir_intrinsic_demote_if ||
intr->intrinsic == nir_intrinsic_terminate_if) {
/* conditional discard: */
src = ir3_get_src(ctx, &intr->src[0]);
cond = src[0];
} else {
/* unconditional discard: */
cond = create_immed_typed(b, 1, ctx->compiler->bool_type);
}
/* NOTE: only cmps.*.* can write p0.x: */
struct ir3_instruction *zero =
create_immed_typed(b, 0, is_half(cond) ? TYPE_U16 : TYPE_U32);
cond = ir3_CMPS_S(b, cond, 0, zero, 0);
cond->cat2.condition = IR3_COND_NE;
/* condition always goes in predicate register: */
cond->dsts[0]->num = regid(REG_P0, 0);
cond->dsts[0]->flags &= ~IR3_REG_SSA;
if (intr->intrinsic == nir_intrinsic_demote ||
intr->intrinsic == nir_intrinsic_demote_if) {
kill = ir3_DEMOTE(b, cond, 0);
} else {
kill = ir3_KILL(b, cond, 0);
}
/* Side-effects should not be moved on a different side of the kill */
kill->barrier_class = IR3_BARRIER_IMAGE_W | IR3_BARRIER_BUFFER_W;
kill->barrier_conflict = IR3_BARRIER_IMAGE_W | IR3_BARRIER_BUFFER_W;
kill->srcs[0]->num = regid(REG_P0, 0);
array_insert(ctx->ir, ctx->ir->predicates, kill);
array_insert(b, b->keeps, kill);
ctx->so->has_kill = true;
break;
}
case nir_intrinsic_cond_end_ir3: {
struct ir3_instruction *cond, *kill;
src = ir3_get_src(ctx, &intr->src[0]);
cond = src[0];
/* NOTE: only cmps.*.* can write p0.x: */
struct ir3_instruction *zero =
create_immed_typed(b, 0, is_half(cond) ? TYPE_U16 : TYPE_U32);
cond = ir3_CMPS_S(b, cond, 0, zero, 0);
cond->cat2.condition = IR3_COND_NE;
/* condition always goes in predicate register: */
cond->dsts[0]->num = regid(REG_P0, 0);
kill = ir3_PREDT(b, cond, 0);
kill->barrier_class = IR3_BARRIER_EVERYTHING;
kill->barrier_conflict = IR3_BARRIER_EVERYTHING;
array_insert(ctx->ir, ctx->ir->predicates, kill);
array_insert(b, b->keeps, kill);
break;
}
case nir_intrinsic_vote_any:
case nir_intrinsic_vote_all: {
struct ir3_instruction *src = ir3_get_src(ctx, &intr->src[0])[0];
struct ir3_instruction *pred = ir3_get_predicate(ctx, src);
if (intr->intrinsic == nir_intrinsic_vote_any)
dst[0] = ir3_ANY_MACRO(ctx->block, pred, 0);
else
dst[0] = ir3_ALL_MACRO(ctx->block, pred, 0);
dst[0]->srcs[0]->num = regid(REG_P0, 0);
array_insert(ctx->ir, ctx->ir->predicates, dst[0]);
break;
}
case nir_intrinsic_elect:
dst[0] = ir3_ELECT_MACRO(ctx->block);
/* This may expand to a divergent if/then, so allocate stack space for
* it.
*/
ctx->max_stack = MAX2(ctx->max_stack, ctx->stack + 1);
break;
case nir_intrinsic_preamble_start_ir3:
dst[0] = ir3_SHPS_MACRO(ctx->block);
ctx->max_stack = MAX2(ctx->max_stack, ctx->stack + 1);
break;
case nir_intrinsic_read_invocation_cond_ir3: {
struct ir3_instruction *src = ir3_get_src(ctx, &intr->src[0])[0];
struct ir3_instruction *cond = ir3_get_src(ctx, &intr->src[1])[0];
dst[0] = ir3_READ_COND_MACRO(ctx->block, ir3_get_predicate(ctx, cond), 0,
src, 0);
dst[0]->dsts[0]->flags |= IR3_REG_SHARED;
dst[0]->srcs[0]->num = regid(REG_P0, 0);
array_insert(ctx->ir, ctx->ir->predicates, dst[0]);
ctx->max_stack = MAX2(ctx->max_stack, ctx->stack + 1);
break;
}
case nir_intrinsic_read_first_invocation: {
struct ir3_instruction *src = ir3_get_src(ctx, &intr->src[0])[0];
dst[0] = ir3_READ_FIRST_MACRO(ctx->block, src, 0);
dst[0]->dsts[0]->flags |= IR3_REG_SHARED;
ctx->max_stack = MAX2(ctx->max_stack, ctx->stack + 1);
break;
}
case nir_intrinsic_ballot: {
struct ir3_instruction *ballot;
unsigned components = intr->dest.ssa.num_components;
if (nir_src_is_const(intr->src[0]) && nir_src_as_bool(intr->src[0])) {
/* ballot(true) is just MOVMSK */
ballot = ir3_MOVMSK(ctx->block, components);
} else {
struct ir3_instruction *src = ir3_get_src(ctx, &intr->src[0])[0];
struct ir3_instruction *pred = ir3_get_predicate(ctx, src);
ballot = ir3_BALLOT_MACRO(ctx->block, pred, components);
ballot->srcs[0]->num = regid(REG_P0, 0);
array_insert(ctx->ir, ctx->ir->predicates, ballot);
ctx->max_stack = MAX2(ctx->max_stack, ctx->stack + 1);
}
ir3_split_dest(ctx->block, dst, ballot, 0, components);
break;
}
case nir_intrinsic_quad_broadcast: {
struct ir3_instruction *src = ir3_get_src(ctx, &intr->src[0])[0];
struct ir3_instruction *idx = ir3_get_src(ctx, &intr->src[1])[0];
type_t dst_type = type_uint_size(nir_dest_bit_size(intr->dest));
if (dst_type != TYPE_U32)
idx = ir3_COV(ctx->block, idx, TYPE_U32, dst_type);
dst[0] = ir3_QUAD_SHUFFLE_BRCST(ctx->block, src, 0, idx, 0);
dst[0]->cat5.type = dst_type;
break;
}
case nir_intrinsic_quad_swap_horizontal: {
struct ir3_instruction *src = ir3_get_src(ctx, &intr->src[0])[0];
dst[0] = ir3_QUAD_SHUFFLE_HORIZ(ctx->block, src, 0);
dst[0]->cat5.type = type_uint_size(nir_dest_bit_size(intr->dest));
break;
}
case nir_intrinsic_quad_swap_vertical: {
struct ir3_instruction *src = ir3_get_src(ctx, &intr->src[0])[0];
dst[0] = ir3_QUAD_SHUFFLE_VERT(ctx->block, src, 0);
dst[0]->cat5.type = type_uint_size(nir_dest_bit_size(intr->dest));
break;
}
case nir_intrinsic_quad_swap_diagonal: {
struct ir3_instruction *src = ir3_get_src(ctx, &intr->src[0])[0];
dst[0] = ir3_QUAD_SHUFFLE_DIAG(ctx->block, src, 0);
dst[0]->cat5.type = type_uint_size(nir_dest_bit_size(intr->dest));
break;
}
case nir_intrinsic_load_shared_ir3:
emit_intrinsic_load_shared_ir3(ctx, intr, dst);
break;
case nir_intrinsic_store_shared_ir3:
emit_intrinsic_store_shared_ir3(ctx, intr);
break;
case nir_intrinsic_bindless_resource_ir3:
dst[0] = ir3_get_src(ctx, &intr->src[0])[0];
break;
case nir_intrinsic_global_atomic_add_ir3:
case nir_intrinsic_global_atomic_imin_ir3:
case nir_intrinsic_global_atomic_umin_ir3:
case nir_intrinsic_global_atomic_imax_ir3:
case nir_intrinsic_global_atomic_umax_ir3:
case nir_intrinsic_global_atomic_and_ir3:
case nir_intrinsic_global_atomic_or_ir3:
case nir_intrinsic_global_atomic_xor_ir3:
case nir_intrinsic_global_atomic_exchange_ir3:
case nir_intrinsic_global_atomic_comp_swap_ir3: {
dst[0] = ctx->funcs->emit_intrinsic_atomic_global(ctx, intr);
break;
}
case nir_intrinsic_reduce:
case nir_intrinsic_inclusive_scan:
case nir_intrinsic_exclusive_scan:
dst[0] = emit_intrinsic_reduce(ctx, intr);
break;
case nir_intrinsic_preamble_end_ir3: {
struct ir3_instruction *instr = ir3_SHPE(ctx->block);
instr->barrier_class = instr->barrier_conflict = IR3_BARRIER_CONST_W;
array_insert(b, b->keeps, instr);
break;
}
case nir_intrinsic_store_uniform_ir3: {
unsigned components = nir_src_num_components(intr->src[0]);
unsigned dst = nir_intrinsic_base(intr);
unsigned dst_lo = dst & 0xff;
unsigned dst_hi = dst >> 8;
struct ir3_instruction *src =
ir3_create_collect(b, ir3_get_src(ctx, &intr->src[0]), components);
struct ir3_instruction *a1 = NULL;
if (dst_hi) {
/* Encode only the high part of the destination in a1.x to increase the
* chance that we can reuse the a1.x value in subsequent stc
* instructions.
*/
a1 = ir3_get_addr1(ctx, dst_hi << 8);
}
struct ir3_instruction *stc =
ir3_STC(ctx->block, create_immed(b, dst_lo), 0, src, 0);
stc->cat6.iim_val = components;
stc->cat6.type = TYPE_U32;
stc->barrier_conflict = IR3_BARRIER_CONST_W;
if (a1) {
ir3_instr_set_address(stc, a1);
stc->flags |= IR3_INSTR_A1EN;
}
array_insert(b, b->keeps, stc);
break;
}
default:
ir3_context_error(ctx, "Unhandled intrinsic type: %s\n",
nir_intrinsic_infos[intr->intrinsic].name);
break;
}
if (info->has_dest)
ir3_put_dst(ctx, &intr->dest);
}
static void
emit_load_const(struct ir3_context *ctx, nir_load_const_instr *instr)
{
struct ir3_instruction **dst =
ir3_get_dst_ssa(ctx, &instr->def, instr->def.num_components);
unsigned bit_size = ir3_bitsize(ctx, instr->def.bit_size);
if (bit_size <= 8) {
for (int i = 0; i < instr->def.num_components; i++)
dst[i] = create_immed_typed(ctx->block, instr->value[i].u8, TYPE_U8);
} else if (bit_size <= 16) {
for (int i = 0; i < instr->def.num_components; i++)
dst[i] = create_immed_typed(ctx->block, instr->value[i].u16, TYPE_U16);
} else {
for (int i = 0; i < instr->def.num_components; i++)
dst[i] = create_immed_typed(ctx->block, instr->value[i].u32, TYPE_U32);
}
}
static void
emit_undef(struct ir3_context *ctx, nir_ssa_undef_instr *undef)
{
struct ir3_instruction **dst =
ir3_get_dst_ssa(ctx, &undef->def, undef->def.num_components);
type_t type = utype_for_size(ir3_bitsize(ctx, undef->def.bit_size));
/* backend doesn't want undefined instructions, so just plug
* in 0.0..
*/
for (int i = 0; i < undef->def.num_components; i++)
dst[i] = create_immed_typed(ctx->block, fui(0.0), type);
}
/*
* texture fetch/sample instructions:
*/
static type_t
get_tex_dest_type(nir_tex_instr *tex)
{
type_t type;
switch (tex->dest_type) {
case nir_type_float32:
return TYPE_F32;
case nir_type_float16:
return TYPE_F16;
case nir_type_int32:
return TYPE_S32;
case nir_type_int16:
return TYPE_S16;
case nir_type_bool32:
case nir_type_uint32:
return TYPE_U32;
case nir_type_bool16:
case nir_type_uint16:
return TYPE_U16;
case nir_type_invalid:
default:
unreachable("bad dest_type");
}
return type;
}
static void
tex_info(nir_tex_instr *tex, unsigned *flagsp, unsigned *coordsp)
{
unsigned coords =
glsl_get_sampler_dim_coordinate_components(tex->sampler_dim);
unsigned flags = 0;
/* note: would use tex->coord_components.. except txs.. also,
* since array index goes after shadow ref, we don't want to
* count it:
*/
if (coords == 3)
flags |= IR3_INSTR_3D;
if (tex->is_shadow && tex->op != nir_texop_lod)
flags |= IR3_INSTR_S;
if (tex->is_array && tex->op != nir_texop_lod)
flags |= IR3_INSTR_A;
*flagsp = flags;
*coordsp = coords;
}
/* Gets the sampler/texture idx as a hvec2. Which could either be dynamic
* or immediate (in which case it will get lowered later to a non .s2en
* version of the tex instruction which encode tex/samp as immediates:
*/
static struct tex_src_info
get_tex_samp_tex_src(struct ir3_context *ctx, nir_tex_instr *tex)
{
struct ir3_block *b = ctx->block;
struct tex_src_info info = {0};
int texture_idx = nir_tex_instr_src_index(tex, nir_tex_src_texture_handle);
int sampler_idx = nir_tex_instr_src_index(tex, nir_tex_src_sampler_handle);
struct ir3_instruction *texture, *sampler;
if (texture_idx >= 0 || sampler_idx >= 0) {
/* Bindless case */
info.flags |= IR3_INSTR_B;
if (tex->texture_non_uniform || tex->sampler_non_uniform)
info.flags |= IR3_INSTR_NONUNIF;
/* Gather information required to determine which encoding to
* choose as well as for prefetch.
*/
nir_intrinsic_instr *bindless_tex = NULL;
bool tex_const;
if (texture_idx >= 0) {
ctx->so->bindless_tex = true;
bindless_tex = ir3_bindless_resource(tex->src[texture_idx].src);
assert(bindless_tex);
info.tex_base = nir_intrinsic_desc_set(bindless_tex);
tex_const = nir_src_is_const(bindless_tex->src[0]);
if (tex_const)
info.tex_idx = nir_src_as_uint(bindless_tex->src[0]);
} else {
/* To simplify some of the logic below, assume the index is
* constant 0 when it's not enabled.
*/
tex_const = true;
info.tex_idx = 0;
}
nir_intrinsic_instr *bindless_samp = NULL;
bool samp_const;
if (sampler_idx >= 0) {
ctx->so->bindless_samp = true;
bindless_samp = ir3_bindless_resource(tex->src[sampler_idx].src);
assert(bindless_samp);
info.samp_base = nir_intrinsic_desc_set(bindless_samp);
samp_const = nir_src_is_const(bindless_samp->src[0]);
if (samp_const)
info.samp_idx = nir_src_as_uint(bindless_samp->src[0]);
} else {
samp_const = true;
info.samp_idx = 0;
}
/* Choose encoding. */
if (tex_const && samp_const && info.tex_idx < 256 &&
info.samp_idx < 256) {
if (info.tex_idx < 16 && info.samp_idx < 16 &&
(!bindless_tex || !bindless_samp ||
info.tex_base == info.samp_base)) {
/* Everything fits within the instruction */
info.base = info.tex_base;
} else {
info.base = info.tex_base;
info.a1_val = info.tex_idx << 3 | info.samp_base;
info.flags |= IR3_INSTR_A1EN;
}
info.samp_tex = NULL;
} else {
info.flags |= IR3_INSTR_S2EN;
/* In the indirect case, we only use a1.x to store the sampler
* base if it differs from the texture base.
*/
if (!bindless_tex || !bindless_samp ||
info.tex_base == info.samp_base) {
info.base = info.tex_base;
} else {
info.base = info.tex_base;
info.a1_val = info.samp_base;
info.flags |= IR3_INSTR_A1EN;
}
/* Note: the indirect source is now a vec2 instead of hvec2, and
* for some reason the texture and sampler are swapped.
*/
struct ir3_instruction *texture, *sampler;
if (bindless_tex) {
texture = ir3_get_src(ctx, &tex->src[texture_idx].src)[0];
} else {
texture = create_immed(b, 0);
}
if (bindless_samp) {
sampler = ir3_get_src(ctx, &tex->src[sampler_idx].src)[0];
} else {
sampler = create_immed(b, 0);
}
info.samp_tex = ir3_collect(b, texture, sampler);
}
} else {
info.flags |= IR3_INSTR_S2EN;
texture_idx = nir_tex_instr_src_index(tex, nir_tex_src_texture_offset);
sampler_idx = nir_tex_instr_src_index(tex, nir_tex_src_sampler_offset);
if (texture_idx >= 0) {
texture = ir3_get_src(ctx, &tex->src[texture_idx].src)[0];
texture = ir3_COV(ctx->block, texture, TYPE_U32, TYPE_U16);
} else {
/* TODO what to do for dynamic case? I guess we only need the
* max index for astc srgb workaround so maybe not a problem
* to worry about if we don't enable indirect samplers for
* a4xx?
*/
ctx->max_texture_index =
MAX2(ctx->max_texture_index, tex->texture_index);
texture = create_immed_typed(ctx->block, tex->texture_index, TYPE_U16);
info.tex_idx = tex->texture_index;
}
if (sampler_idx >= 0) {
sampler = ir3_get_src(ctx, &tex->src[sampler_idx].src)[0];
sampler = ir3_COV(ctx->block, sampler, TYPE_U32, TYPE_U16);
} else {
sampler = create_immed_typed(ctx->block, tex->sampler_index, TYPE_U16);
info.samp_idx = tex->texture_index;
}
info.samp_tex = ir3_collect(b, sampler, texture);
}
return info;
}
static void
emit_tex(struct ir3_context *ctx, nir_tex_instr *tex)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction **dst, *sam, *src0[12], *src1[4];
struct ir3_instruction *const *coord, *const *off, *const *ddx, *const *ddy;
struct ir3_instruction *lod, *compare, *proj, *sample_index;
struct tex_src_info info = {0};
bool has_bias = false, has_lod = false, has_proj = false, has_off = false;
unsigned i, coords, flags, ncomp;
unsigned nsrc0 = 0, nsrc1 = 0;
type_t type;
opc_t opc = 0;
ncomp = nir_dest_num_components(tex->dest);
coord = off = ddx = ddy = NULL;
lod = proj = compare = sample_index = NULL;
dst = ir3_get_dst(ctx, &tex->dest, ncomp);
for (unsigned i = 0; i < tex->num_srcs; i++) {
switch (tex->src[i].src_type) {
case nir_tex_src_coord:
coord = ir3_get_src(ctx, &tex->src[i].src);
break;
case nir_tex_src_bias:
lod = ir3_get_src(ctx, &tex->src[i].src)[0];
has_bias = true;
break;
case nir_tex_src_lod:
lod = ir3_get_src(ctx, &tex->src[i].src)[0];
has_lod = true;
break;
case nir_tex_src_comparator: /* shadow comparator */
compare = ir3_get_src(ctx, &tex->src[i].src)[0];
break;
case nir_tex_src_projector:
proj = ir3_get_src(ctx, &tex->src[i].src)[0];
has_proj = true;
break;
case nir_tex_src_offset:
off = ir3_get_src(ctx, &tex->src[i].src);
has_off = true;
break;
case nir_tex_src_ddx:
ddx = ir3_get_src(ctx, &tex->src[i].src);
break;
case nir_tex_src_ddy:
ddy = ir3_get_src(ctx, &tex->src[i].src);
break;
case nir_tex_src_ms_index:
sample_index = ir3_get_src(ctx, &tex->src[i].src)[0];
break;
case nir_tex_src_texture_offset:
case nir_tex_src_sampler_offset:
case nir_tex_src_texture_handle:
case nir_tex_src_sampler_handle:
/* handled in get_tex_samp_src() */
break;
default:
ir3_context_error(ctx, "Unhandled NIR tex src type: %d\n",
tex->src[i].src_type);
return;
}
}
switch (tex->op) {
case nir_texop_tex_prefetch:
compile_assert(ctx, !has_bias);
compile_assert(ctx, !has_lod);
compile_assert(ctx, !compare);
compile_assert(ctx, !has_proj);
compile_assert(ctx, !has_off);
compile_assert(ctx, !ddx);
compile_assert(ctx, !ddy);
compile_assert(ctx, !sample_index);
compile_assert(
ctx, nir_tex_instr_src_index(tex, nir_tex_src_texture_offset) < 0);
compile_assert(
ctx, nir_tex_instr_src_index(tex, nir_tex_src_sampler_offset) < 0);
if (ctx->so->num_sampler_prefetch < ctx->prefetch_limit) {
opc = OPC_META_TEX_PREFETCH;
ctx->so->num_sampler_prefetch++;
break;
}
FALLTHROUGH;
case nir_texop_tex:
opc = has_lod ? OPC_SAML : OPC_SAM;
break;
case nir_texop_txb:
opc = OPC_SAMB;
break;
case nir_texop_txl:
opc = OPC_SAML;
break;
case nir_texop_txd:
opc = OPC_SAMGQ;
break;
case nir_texop_txf:
opc = OPC_ISAML;
break;
case nir_texop_lod:
opc = OPC_GETLOD;
break;
case nir_texop_tg4:
switch (tex->component) {
case 0:
opc = OPC_GATHER4R;
break;
case 1:
opc = OPC_GATHER4G;
break;
case 2:
opc = OPC_GATHER4B;
break;
case 3:
opc = OPC_GATHER4A;
break;
}
break;
case nir_texop_txf_ms_fb:
case nir_texop_txf_ms:
opc = OPC_ISAMM;
break;
default:
ir3_context_error(ctx, "Unhandled NIR tex type: %d\n", tex->op);
return;
}
tex_info(tex, &flags, &coords);
/*
* lay out the first argument in the proper order:
* - actual coordinates first
* - shadow reference
* - array index
* - projection w
* - starting at offset 4, dpdx.xy, dpdy.xy
*
* bias/lod go into the second arg
*/
/* insert tex coords: */
for (i = 0; i < coords; i++)
src0[i] = coord[i];
nsrc0 = i;
type_t coord_pad_type = is_half(coord[0]) ? TYPE_U16 : TYPE_U32;
/* scale up integer coords for TXF based on the LOD */
if (ctx->compiler->unminify_coords && (opc == OPC_ISAML)) {
assert(has_lod);
for (i = 0; i < coords; i++)
src0[i] = ir3_SHL_B(b, src0[i], 0, lod, 0);
}
if (coords == 1) {
/* hw doesn't do 1d, so we treat it as 2d with
* height of 1, and patch up the y coord.
*/
if (is_isam(opc)) {
src0[nsrc0++] = create_immed_typed(b, 0, coord_pad_type);
} else if (is_half(coord[0])) {
src0[nsrc0++] = create_immed_typed(b, _mesa_float_to_half(0.5), coord_pad_type);
} else {
src0[nsrc0++] = create_immed_typed(b, fui(0.5), coord_pad_type);
}
}
if (tex->is_shadow && tex->op != nir_texop_lod)
src0[nsrc0++] = compare;
if (tex->is_array && tex->op != nir_texop_lod)
src0[nsrc0++] = coord[coords];
if (has_proj) {
src0[nsrc0++] = proj;
flags |= IR3_INSTR_P;
}
/* pad to 4, then ddx/ddy: */
if (tex->op == nir_texop_txd) {
while (nsrc0 < 4)
src0[nsrc0++] = create_immed_typed(b, fui(0.0), coord_pad_type);
for (i = 0; i < coords; i++)
src0[nsrc0++] = ddx[i];
if (coords < 2)
src0[nsrc0++] = create_immed_typed(b, fui(0.0), coord_pad_type);
for (i = 0; i < coords; i++)
src0[nsrc0++] = ddy[i];
if (coords < 2)
src0[nsrc0++] = create_immed_typed(b, fui(0.0), coord_pad_type);
}
/* NOTE a3xx (and possibly a4xx?) might be different, using isaml
* with scaled x coord according to requested sample:
*/
if (opc == OPC_ISAMM) {
if (ctx->compiler->txf_ms_with_isaml) {
/* the samples are laid out in x dimension as
* 0 1 2 3
* x_ms = (x << ms) + sample_index;
*/
struct ir3_instruction *ms;
ms = create_immed(b, (ctx->samples >> (2 * tex->texture_index)) & 3);
src0[0] = ir3_SHL_B(b, src0[0], 0, ms, 0);
src0[0] = ir3_ADD_U(b, src0[0], 0, sample_index, 0);
opc = OPC_ISAML;
} else {
src0[nsrc0++] = sample_index;
}
}
/*
* second argument (if applicable):
* - offsets
* - lod
* - bias
*/
if (has_off | has_lod | has_bias) {
if (has_off) {
unsigned off_coords = coords;
if (tex->sampler_dim == GLSL_SAMPLER_DIM_CUBE)
off_coords--;
for (i = 0; i < off_coords; i++)
src1[nsrc1++] = off[i];
if (off_coords < 2)
src1[nsrc1++] = create_immed_typed(b, fui(0.0), coord_pad_type);
flags |= IR3_INSTR_O;
}
if (has_lod | has_bias)
src1[nsrc1++] = lod;
}
type = get_tex_dest_type(tex);
if (opc == OPC_GETLOD)
type = TYPE_S32;
if (tex->op == nir_texop_txf_ms_fb) {
/* only expect a single txf_ms_fb per shader: */
compile_assert(ctx, !ctx->so->fb_read);
compile_assert(ctx, ctx->so->type == MESA_SHADER_FRAGMENT);
ctx->so->fb_read = true;
info.samp_tex = ir3_collect(
b, create_immed_typed(ctx->block, ctx->so->num_samp, TYPE_U16),
create_immed_typed(ctx->block, ctx->so->num_samp, TYPE_U16));
info.flags = IR3_INSTR_S2EN;
ctx->so->num_samp++;
} else {
info = get_tex_samp_tex_src(ctx, tex);
}
bool tg4_swizzle_fixup = false;
if (tex->op == nir_texop_tg4 && ctx->compiler->gen == 4 &&
ctx->sampler_swizzles[tex->texture_index] != 0x688 /* rgba */) {
uint16_t swizzles = ctx->sampler_swizzles[tex->texture_index];
uint16_t swizzle = (swizzles >> (tex->component * 3)) & 7;
if (swizzle > 3) {
/* this would mean that we can just return 0 / 1, no texturing
* necessary
*/
struct ir3_instruction *imm = create_immed(b,
type_float(type) ? fui(swizzle - 4) : (swizzle - 4));
for (int i = 0; i < 4; i++)
dst[i] = imm;
ir3_put_dst(ctx, &tex->dest);
return;
}
opc = OPC_GATHER4R + swizzle;
tg4_swizzle_fixup = true;
}
struct ir3_instruction *col0 = ir3_create_collect(b, src0, nsrc0);
struct ir3_instruction *col1 = ir3_create_collect(b, src1, nsrc1);
if (opc == OPC_META_TEX_PREFETCH) {
int idx = nir_tex_instr_src_index(tex, nir_tex_src_coord);
compile_assert(ctx, tex->src[idx].src.is_ssa);
sam = ir3_SAM(ctx->in_block, opc, type, MASK(ncomp), 0, NULL,
get_barycentric(ctx, IJ_PERSP_PIXEL), 0);
sam->prefetch.input_offset = ir3_nir_coord_offset(tex->src[idx].src.ssa);
/* make sure not to add irrelevant flags like S2EN */
sam->flags = flags | (info.flags & IR3_INSTR_B);
sam->prefetch.tex = info.tex_idx;
sam->prefetch.samp = info.samp_idx;
sam->prefetch.tex_base = info.tex_base;
sam->prefetch.samp_base = info.samp_base;
} else {
info.flags |= flags;
sam = emit_sam(ctx, opc, info, type, MASK(ncomp), col0, col1);
}
if (tg4_swizzle_fixup) {
/* TODO: fix-up for ASTC when alpha is selected? */
array_insert(ctx->ir, ctx->ir->tg4, sam);
ir3_split_dest(b, dst, sam, 0, 4);
uint8_t tex_bits = ctx->sampler_swizzles[tex->texture_index] >> 12;
if (!type_float(type) && tex_bits != 3 /* 32bpp */ &&
tex_bits != 0 /* key unset */) {
uint8_t bits = 0;
switch (tex_bits) {
case 1: /* 8bpp */
bits = 8;
break;
case 2: /* 16bpp */
bits = 16;
break;
case 4: /* 10bpp or 2bpp for alpha */
if (opc == OPC_GATHER4A)
bits = 2;
else
bits = 10;
break;
default:
assert(0);
}
sam->cat5.type = TYPE_F32;
for (int i = 0; i < 4; i++) {
/* scale and offset the unorm data */
dst[i] = ir3_MAD_F32(b, dst[i], 0, create_immed(b, fui((1 << bits) - 1)), 0, create_immed(b, fui(0.5f)), 0);
/* convert the scaled value to integer */
dst[i] = ir3_COV(b, dst[i], TYPE_F32, TYPE_U32);
/* sign extend for signed values */
if (type == TYPE_S32) {
dst[i] = ir3_SHL_B(b, dst[i], 0, create_immed(b, 32 - bits), 0);
dst[i] = ir3_ASHR_B(b, dst[i], 0, create_immed(b, 32 - bits), 0);
}
}
}
} else if ((ctx->astc_srgb & (1 << tex->texture_index)) &&
tex->op != nir_texop_tg4 && /* leave out tg4, unless it's on alpha? */
!nir_tex_instr_is_query(tex)) {
assert(opc != OPC_META_TEX_PREFETCH);
/* only need first 3 components: */
sam->dsts[0]->wrmask = 0x7;
ir3_split_dest(b, dst, sam, 0, 3);
/* we need to sample the alpha separately with a non-SRGB
* texture state:
*/
sam = ir3_SAM(b, opc, type, 0b1000, flags | info.flags, info.samp_tex,
col0, col1);
array_insert(ctx->ir, ctx->ir->astc_srgb, sam);
/* fixup .w component: */
ir3_split_dest(b, &dst[3], sam, 3, 1);
} else {
/* normal (non-workaround) case: */
ir3_split_dest(b, dst, sam, 0, ncomp);
}
/* GETLOD returns results in 4.8 fixed point */
if (opc == OPC_GETLOD) {
bool half = nir_dest_bit_size(tex->dest) == 16;
struct ir3_instruction *factor =
half ? create_immed_typed(b, _mesa_float_to_half(1.0 / 256), TYPE_F16)
: create_immed(b, fui(1.0 / 256));
for (i = 0; i < 2; i++) {
dst[i] = ir3_MUL_F(
b, ir3_COV(b, dst[i], TYPE_S32, half ? TYPE_F16 : TYPE_F32), 0,
factor, 0);
}
}
ir3_put_dst(ctx, &tex->dest);
}
static void
emit_tex_info(struct ir3_context *ctx, nir_tex_instr *tex, unsigned idx)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction **dst, *sam;
type_t dst_type = get_tex_dest_type(tex);
struct tex_src_info info = get_tex_samp_tex_src(ctx, tex);
dst = ir3_get_dst(ctx, &tex->dest, 1);
sam = emit_sam(ctx, OPC_GETINFO, info, dst_type, 1 << idx, NULL, NULL);
/* even though there is only one component, since it ends
* up in .y/.z/.w rather than .x, we need a split_dest()
*/
ir3_split_dest(b, dst, sam, idx, 1);
/* The # of levels comes from getinfo.z. We need to add 1 to it, since
* the value in TEX_CONST_0 is zero-based.
*/
if (ctx->compiler->levels_add_one)
dst[0] = ir3_ADD_U(b, dst[0], 0, create_immed(b, 1), 0);
ir3_put_dst(ctx, &tex->dest);
}
static void
emit_tex_txs(struct ir3_context *ctx, nir_tex_instr *tex)
{
struct ir3_block *b = ctx->block;
struct ir3_instruction **dst, *sam;
struct ir3_instruction *lod;
unsigned flags, coords;
type_t dst_type = get_tex_dest_type(tex);
struct tex_src_info info = get_tex_samp_tex_src(ctx, tex);
tex_info(tex, &flags, &coords);
info.flags |= flags;
/* Actually we want the number of dimensions, not coordinates. This
* distinction only matters for cubes.
*/
if (tex->sampler_dim == GLSL_SAMPLER_DIM_CUBE)
coords = 2;
dst = ir3_get_dst(ctx, &tex->dest, 4);
int lod_idx = nir_tex_instr_src_index(tex, nir_tex_src_lod);
compile_assert(ctx, lod_idx >= 0);
lod = ir3_get_src(ctx, &tex->src[lod_idx].src)[0];
if (tex->sampler_dim != GLSL_SAMPLER_DIM_BUF) {
sam = emit_sam(ctx, OPC_GETSIZE, info, dst_type, 0b1111, lod, NULL);
} else {
/*
* The maximum value which OPC_GETSIZE could return for one dimension
* is 0x007ff0, however sampler buffer could be much bigger.
* Blob uses OPC_GETBUF for them.
*/
sam = emit_sam(ctx, OPC_GETBUF, info, dst_type, 0b1111, NULL, NULL);
}
ir3_split_dest(b, dst, sam, 0, 4);
/* Array size actually ends up in .w rather than .z. This doesn't
* matter for miplevel 0, but for higher mips the value in z is
* minified whereas w stays. Also, the value in TEX_CONST_3_DEPTH is
* returned, which means that we have to add 1 to it for arrays.
*/
if (tex->is_array) {
if (ctx->compiler->levels_add_one) {
dst[coords] = ir3_ADD_U(b, dst[3], 0, create_immed(b, 1), 0);
} else {
dst[coords] = ir3_MOV(b, dst[3], TYPE_U32);
}
}
ir3_put_dst(ctx, &tex->dest);
}
/* phi instructions are left partially constructed. We don't resolve
* their srcs until the end of the shader, since (eg. loops) one of
* the phi's srcs might be defined after the phi due to back edges in
* the CFG.
*/
static void
emit_phi(struct ir3_context *ctx, nir_phi_instr *nphi)
{
struct ir3_instruction *phi, **dst;
/* NOTE: phi's should be lowered to scalar at this point */
compile_assert(ctx, nphi->dest.ssa.num_components == 1);
dst = ir3_get_dst(ctx, &nphi->dest, 1);
phi = ir3_instr_create(ctx->block, OPC_META_PHI, 1,
exec_list_length(&nphi->srcs));
__ssa_dst(phi);
phi->phi.nphi = nphi;
dst[0] = phi;
ir3_put_dst(ctx, &nphi->dest);
}
static struct ir3_block *get_block(struct ir3_context *ctx,
const nir_block *nblock);
static struct ir3_instruction *
read_phi_src(struct ir3_context *ctx, struct ir3_block *blk,
struct ir3_instruction *phi, nir_phi_instr *nphi)
{
if (!blk->nblock) {
struct ir3_instruction *continue_phi =
ir3_instr_create(blk, OPC_META_PHI, 1, blk->predecessors_count);
__ssa_dst(continue_phi)->flags = phi->dsts[0]->flags;
for (unsigned i = 0; i < blk->predecessors_count; i++) {
struct ir3_instruction *src =
read_phi_src(ctx, blk->predecessors[i], phi, nphi);
if (src)
__ssa_src(continue_phi, src, 0);
else
ir3_src_create(continue_phi, INVALID_REG, phi->dsts[0]->flags);
}
return continue_phi;
}
nir_foreach_phi_src (nsrc, nphi) {
if (blk->nblock == nsrc->pred) {
if (nsrc->src.ssa->parent_instr->type == nir_instr_type_ssa_undef) {
/* Create an ir3 undef */
return NULL;
} else {
return ir3_get_src(ctx, &nsrc->src)[0];
}
}
}
unreachable("couldn't find phi node ir3 block");
return NULL;
}
static void
resolve_phis(struct ir3_context *ctx, struct ir3_block *block)
{
foreach_instr (phi, &block->instr_list) {
if (phi->opc != OPC_META_PHI)
break;
nir_phi_instr *nphi = phi->phi.nphi;
if (!nphi) /* skip continue phis created above */
continue;
for (unsigned i = 0; i < block->predecessors_count; i++) {
struct ir3_block *pred = block->predecessors[i];
struct ir3_instruction *src = read_phi_src(ctx, pred, phi, nphi);
if (src) {
__ssa_src(phi, src, 0);
} else {
/* Create an ir3 undef */
ir3_src_create(phi, INVALID_REG, phi->dsts[0]->flags);
}
}
}
}
static void
emit_jump(struct ir3_context *ctx, nir_jump_instr *jump)
{
switch (jump->type) {
case nir_jump_break:
case nir_jump_continue:
case nir_jump_return:
/* I *think* we can simply just ignore this, and use the
* successor block link to figure out where we need to
* jump to for break/continue
*/
break;
default:
ir3_context_error(ctx, "Unhandled NIR jump type: %d\n", jump->type);
break;
}
}
static void
emit_instr(struct ir3_context *ctx, nir_instr *instr)
{
switch (instr->type) {
case nir_instr_type_alu:
emit_alu(ctx, nir_instr_as_alu(instr));
break;
case nir_instr_type_deref:
/* ignored, handled as part of the intrinsic they are src to */
break;
case nir_instr_type_intrinsic:
emit_intrinsic(ctx, nir_instr_as_intrinsic(instr));
break;
case nir_instr_type_load_const:
emit_load_const(ctx, nir_instr_as_load_const(instr));
break;
case nir_instr_type_ssa_undef:
emit_undef(ctx, nir_instr_as_ssa_undef(instr));
break;
case nir_instr_type_tex: {
nir_tex_instr *tex = nir_instr_as_tex(instr);
/* couple tex instructions get special-cased:
*/
switch (tex->op) {
case nir_texop_txs:
emit_tex_txs(ctx, tex);
break;
case nir_texop_query_levels:
emit_tex_info(ctx, tex, 2);
break;
case nir_texop_texture_samples:
emit_tex_info(ctx, tex, 3);
break;
default:
emit_tex(ctx, tex);
break;
}
break;
}
case nir_instr_type_jump:
emit_jump(ctx, nir_instr_as_jump(instr));
break;
case nir_instr_type_phi:
emit_phi(ctx, nir_instr_as_phi(instr));
break;
case nir_instr_type_call:
case nir_instr_type_parallel_copy:
ir3_context_error(ctx, "Unhandled NIR instruction type: %d\n",
instr->type);
break;
}
}
static struct ir3_block *
get_block(struct ir3_context *ctx, const nir_block *nblock)
{
struct ir3_block *block;
struct hash_entry *hentry;
hentry = _mesa_hash_table_search(ctx->block_ht, nblock);
if (hentry)
return hentry->data;
block = ir3_block_create(ctx->ir);
block->nblock = nblock;
_mesa_hash_table_insert(ctx->block_ht, nblock, block);
return block;
}
static struct ir3_block *
get_block_or_continue(struct ir3_context *ctx, const nir_block *nblock)
{
struct hash_entry *hentry;
hentry = _mesa_hash_table_search(ctx->continue_block_ht, nblock);
if (hentry)
return hentry->data;
return get_block(ctx, nblock);
}
static struct ir3_block *
create_continue_block(struct ir3_context *ctx, const nir_block *nblock)
{
struct ir3_block *block = ir3_block_create(ctx->ir);
block->nblock = NULL;
_mesa_hash_table_insert(ctx->continue_block_ht, nblock, block);
return block;
}
static void
emit_block(struct ir3_context *ctx, nir_block *nblock)
{
ctx->block = get_block(ctx, nblock);
list_addtail(&ctx->block->node, &ctx->ir->block_list);
ctx->block->loop_id = ctx->loop_id;
ctx->block->loop_depth = ctx->loop_depth;
/* re-emit addr register in each block if needed: */
for (int i = 0; i < ARRAY_SIZE(ctx->addr0_ht); i++) {
_mesa_hash_table_destroy(ctx->addr0_ht[i], NULL);
ctx->addr0_ht[i] = NULL;
}
_mesa_hash_table_u64_destroy(ctx->addr1_ht);
ctx->addr1_ht = NULL;
nir_foreach_instr (instr, nblock) {
ctx->cur_instr = instr;
emit_instr(ctx, instr);
ctx->cur_instr = NULL;
if (ctx->error)
return;
}
for (int i = 0; i < ARRAY_SIZE(ctx->block->successors); i++) {
if (nblock->successors[i]) {
ctx->block->successors[i] =
get_block_or_continue(ctx, nblock->successors[i]);
ctx->block->physical_successors[i] = ctx->block->successors[i];
}
}
_mesa_hash_table_clear(ctx->sel_cond_conversions, NULL);
}
static void emit_cf_list(struct ir3_context *ctx, struct exec_list *list);
static void
emit_if(struct ir3_context *ctx, nir_if *nif)
{
struct ir3_instruction *condition = ir3_get_src(ctx, &nif->condition)[0];
if (condition->opc == OPC_ANY_MACRO && condition->block == ctx->block) {
ctx->block->condition = ssa(condition->srcs[0]);
ctx->block->brtype = IR3_BRANCH_ANY;
} else if (condition->opc == OPC_ALL_MACRO &&
condition->block == ctx->block) {
ctx->block->condition = ssa(condition->srcs[0]);
ctx->block->brtype = IR3_BRANCH_ALL;
} else if (condition->opc == OPC_ELECT_MACRO &&
condition->block == ctx->block) {
ctx->block->condition = NULL;
ctx->block->brtype = IR3_BRANCH_GETONE;
} else if (condition->opc == OPC_SHPS_MACRO &&
condition->block == ctx->block) {
/* TODO: technically this only works if the block is the only user of the
* shps, but we only use it in very constrained scenarios so this should
* be ok.
*/
ctx->block->condition = NULL;
ctx->block->brtype = IR3_BRANCH_SHPS;
} else {
ctx->block->condition = ir3_get_predicate(ctx, condition);
ctx->block->brtype = IR3_BRANCH_COND;
}
emit_cf_list(ctx, &nif->then_list);
emit_cf_list(ctx, &nif->else_list);
struct ir3_block *last_then = get_block(ctx, nir_if_last_then_block(nif));
struct ir3_block *first_else = get_block(ctx, nir_if_first_else_block(nif));
assert(last_then->physical_successors[0] &&
!last_then->physical_successors[1]);
last_then->physical_successors[1] = first_else;
struct ir3_block *last_else = get_block(ctx, nir_if_last_else_block(nif));
struct ir3_block *after_if =
get_block(ctx, nir_cf_node_as_block(nir_cf_node_next(&nif->cf_node)));
assert(last_else->physical_successors[0] &&
!last_else->physical_successors[1]);
if (after_if != last_else->physical_successors[0])
last_else->physical_successors[1] = after_if;
}
static void
emit_loop(struct ir3_context *ctx, nir_loop *nloop)
{
unsigned old_loop_id = ctx->loop_id;
ctx->loop_id = ctx->so->loops + 1;
ctx->loop_depth++;
struct nir_block *nstart = nir_loop_first_block(nloop);
struct ir3_block *continue_blk = NULL;
/* There's always one incoming edge from outside the loop, and if there
* are more than two backedges from inside the loop (so more than 2 total
* edges) then we need to create a continue block after the loop to ensure
* that control reconverges at the end of each loop iteration.
*/
if (nstart->predecessors->entries > 2) {
continue_blk = create_continue_block(ctx, nstart);
}
emit_cf_list(ctx, &nloop->body);
if (continue_blk) {
struct ir3_block *start = get_block(ctx, nstart);
continue_blk->successors[0] = start;
continue_blk->physical_successors[0] = start;
continue_blk->loop_id = ctx->loop_id;
continue_blk->loop_depth = ctx->loop_depth;
list_addtail(&continue_blk->node, &ctx->ir->block_list);
}
ctx->so->loops++;
ctx->loop_depth--;
ctx->loop_id = old_loop_id;
}
static void
stack_push(struct ir3_context *ctx)
{
ctx->stack++;
ctx->max_stack = MAX2(ctx->max_stack, ctx->stack);
}
static void
stack_pop(struct ir3_context *ctx)
{
compile_assert(ctx, ctx->stack > 0);
ctx->stack--;
}
static void
emit_cf_list(struct ir3_context *ctx, struct exec_list *list)
{
foreach_list_typed (nir_cf_node, node, node, list) {
switch (node->type) {
case nir_cf_node_block:
emit_block(ctx, nir_cf_node_as_block(node));
break;
case nir_cf_node_if:
stack_push(ctx);
emit_if(ctx, nir_cf_node_as_if(node));
stack_pop(ctx);
break;
case nir_cf_node_loop:
stack_push(ctx);
emit_loop(ctx, nir_cf_node_as_loop(node));
stack_pop(ctx);
break;
case nir_cf_node_function:
ir3_context_error(ctx, "TODO\n");
break;
}
}
}
/* emit stream-out code. At this point, the current block is the original
* (nir) end block, and nir ensures that all flow control paths terminate
* into the end block. We re-purpose the original end block to generate
* the 'if (vtxcnt < maxvtxcnt)' condition, then append the conditional
* block holding stream-out write instructions, followed by the new end
* block:
*
* blockOrigEnd {
* p0.x = (vtxcnt < maxvtxcnt)
* // succs: blockStreamOut, blockNewEnd
* }
* blockStreamOut {
* // preds: blockOrigEnd
* ... stream-out instructions ...
* // succs: blockNewEnd
* }
* blockNewEnd {
* // preds: blockOrigEnd, blockStreamOut
* }
*/
static void
emit_stream_out(struct ir3_context *ctx)
{
struct ir3 *ir = ctx->ir;
struct ir3_stream_output_info *strmout = &ctx->so->stream_output;
struct ir3_block *orig_end_block, *stream_out_block, *new_end_block;
struct ir3_instruction *vtxcnt, *maxvtxcnt, *cond;
struct ir3_instruction *bases[IR3_MAX_SO_BUFFERS];
/* create vtxcnt input in input block at top of shader,
* so that it is seen as live over the entire duration
* of the shader:
*/
vtxcnt = create_sysval_input(ctx, SYSTEM_VALUE_VERTEX_CNT, 0x1);
maxvtxcnt = create_driver_param(ctx, IR3_DP_VTXCNT_MAX);
/* at this point, we are at the original 'end' block,
* re-purpose this block to stream-out condition, then
* append stream-out block and new-end block
*/
orig_end_block = ctx->block;
// maybe w/ store_global intrinsic, we could do this
// stuff in nir->nir pass
stream_out_block = ir3_block_create(ir);
list_addtail(&stream_out_block->node, &ir->block_list);
new_end_block = ir3_block_create(ir);
list_addtail(&new_end_block->node, &ir->block_list);
orig_end_block->successors[0] = stream_out_block;
orig_end_block->successors[1] = new_end_block;
orig_end_block->physical_successors[0] = stream_out_block;
orig_end_block->physical_successors[1] = new_end_block;
stream_out_block->successors[0] = new_end_block;
stream_out_block->physical_successors[0] = new_end_block;
/* setup 'if (vtxcnt < maxvtxcnt)' condition: */
cond = ir3_CMPS_S(ctx->block, vtxcnt, 0, maxvtxcnt, 0);
cond->dsts[0]->num = regid(REG_P0, 0);
cond->dsts[0]->flags &= ~IR3_REG_SSA;
cond->cat2.condition = IR3_COND_LT;
/* condition goes on previous block to the conditional,
* since it is used to pick which of the two successor
* paths to take:
*/
orig_end_block->condition = cond;
/* switch to stream_out_block to generate the stream-out
* instructions:
*/
ctx->block = stream_out_block;
/* Calculate base addresses based on vtxcnt. Instructions
* generated for bases not used in following loop will be
* stripped out in the backend.
*/
for (unsigned i = 0; i < IR3_MAX_SO_BUFFERS; i++) {
const struct ir3_const_state *const_state = ir3_const_state(ctx->so);
unsigned stride = strmout->stride[i];
struct ir3_instruction *base, *off;
base = create_uniform(ctx->block, regid(const_state->offsets.tfbo, i));
/* 24-bit should be enough: */
off = ir3_MUL_U24(ctx->block, vtxcnt, 0,
create_immed(ctx->block, stride * 4), 0);
bases[i] = ir3_ADD_S(ctx->block, off, 0, base, 0);
}
/* Generate the per-output store instructions: */
for (unsigned i = 0; i < strmout->num_outputs; i++) {
for (unsigned j = 0; j < strmout->output[i].num_components; j++) {
unsigned c = j + strmout->output[i].start_component;
struct ir3_instruction *base, *out, *stg;
base = bases[strmout->output[i].output_buffer];
out = ctx->outputs[regid(strmout->output[i].register_index, c)];
stg = ir3_STG(
ctx->block, base, 0,
create_immed(ctx->block, (strmout->output[i].dst_offset + j) * 4),
0, out, 0, create_immed(ctx->block, 1), 0);
stg->cat6.type = TYPE_U32;
array_insert(ctx->block, ctx->block->keeps, stg);
}
}
/* and finally switch to the new_end_block: */
ctx->block = new_end_block;
}
static void
setup_predecessors(struct ir3 *ir)
{
foreach_block (block, &ir->block_list) {
for (int i = 0; i < ARRAY_SIZE(block->successors); i++) {
if (block->successors[i])
ir3_block_add_predecessor(block->successors[i], block);
if (block->physical_successors[i])
ir3_block_add_physical_predecessor(block->physical_successors[i],
block);
}
}
}
static void
emit_function(struct ir3_context *ctx, nir_function_impl *impl)
{
nir_metadata_require(impl, nir_metadata_block_index);
compile_assert(ctx, ctx->stack == 0);
emit_cf_list(ctx, &impl->body);
emit_block(ctx, impl->end_block);
compile_assert(ctx, ctx->stack == 0);
/* at this point, we should have a single empty block,
* into which we emit the 'end' instruction.
*/
compile_assert(ctx, list_is_empty(&ctx->block->instr_list));
/* If stream-out (aka transform-feedback) enabled, emit the
* stream-out instructions, followed by a new empty block (into
* which the 'end' instruction lands).
*
* NOTE: it is done in this order, rather than inserting before
* we emit end_block, because NIR guarantees that all blocks
* flow into end_block, and that end_block has no successors.
* So by re-purposing end_block as the first block of stream-
* out, we guarantee that all exit paths flow into the stream-
* out instructions.
*/
if ((ctx->compiler->gen < 5) &&
(ctx->so->stream_output.num_outputs > 0) &&
!ctx->so->binning_pass) {
assert(ctx->so->type == MESA_SHADER_VERTEX);
emit_stream_out(ctx);
}
setup_predecessors(ctx->ir);
foreach_block (block, &ctx->ir->block_list) {
resolve_phis(ctx, block);
}
}
static void
setup_input(struct ir3_context *ctx, nir_intrinsic_instr *intr)
{
struct ir3_shader_variant *so = ctx->so;
struct ir3_instruction *coord = NULL;
if (intr->intrinsic == nir_intrinsic_load_interpolated_input)
coord = ir3_create_collect(ctx->block, ir3_get_src(ctx, &intr->src[0]), 2);
compile_assert(ctx, nir_src_is_const(intr->src[coord ? 1 : 0]));
unsigned frac = nir_intrinsic_component(intr);
unsigned offset = nir_src_as_uint(intr->src[coord ? 1 : 0]);
unsigned ncomp = nir_intrinsic_dest_components(intr);
unsigned n = nir_intrinsic_base(intr) + offset;
unsigned slot = nir_intrinsic_io_semantics(intr).location + offset;
unsigned compmask;
/* Inputs are loaded using ldlw or ldg for other stages. */
compile_assert(ctx, ctx->so->type == MESA_SHADER_FRAGMENT ||
ctx->so->type == MESA_SHADER_VERTEX);
if (ctx->so->type == MESA_SHADER_FRAGMENT)
compmask = BITFIELD_MASK(ncomp) << frac;
else
compmask = BITFIELD_MASK(ncomp + frac);
/* for a4xx+ rasterflat */
if (so->inputs[n].rasterflat && ctx->so->key.rasterflat)
coord = NULL;
so->total_in += util_bitcount(compmask & ~so->inputs[n].compmask);
so->inputs[n].slot = slot;
so->inputs[n].compmask |= compmask;
so->inputs_count = MAX2(so->inputs_count, n + 1);
compile_assert(ctx, so->inputs_count < ARRAY_SIZE(so->inputs));
so->inputs[n].flat = !coord;
if (ctx->so->type == MESA_SHADER_FRAGMENT) {
compile_assert(ctx, slot != VARYING_SLOT_POS);
so->inputs[n].bary = true;
for (int i = 0; i < ncomp; i++) {
unsigned idx = (n * 4) + i + frac;
ctx->last_dst[i] = create_frag_input(ctx, coord, idx);
}
} else {
struct ir3_instruction *input = NULL;
foreach_input (in, ctx->ir) {
if (in->input.inidx == n) {
input = in;
break;
}
}
if (!input) {
input = create_input(ctx, compmask);
input->input.inidx = n;
} else {
/* For aliased inputs, just append to the wrmask.. ie. if we
* first see a vec2 index at slot N, and then later a vec4,
* the wrmask of the resulting overlapped vec2 and vec4 is 0xf
*/
input->dsts[0]->wrmask |= compmask;
}
for (int i = 0; i < ncomp + frac; i++) {
unsigned idx = (n * 4) + i;
compile_assert(ctx, idx < ctx->ninputs);
/* fixup the src wrmask to avoid validation fail */
if (ctx->inputs[idx] && (ctx->inputs[idx] != input)) {
ctx->inputs[idx]->srcs[0]->wrmask = input->dsts[0]->wrmask;
continue;
}
ir3_split_dest(ctx->block, &ctx->inputs[idx], input, i, 1);
}
for (int i = 0; i < ncomp; i++) {
unsigned idx = (n * 4) + i + frac;
ctx->last_dst[i] = ctx->inputs[idx];
}
}
}
/* Initially we assign non-packed inloc's for varyings, as we don't really
* know up-front which components will be unused. After all the compilation
* stages we scan the shader to see which components are actually used, and
* re-pack the inlocs to eliminate unneeded varyings.
*/
static void
pack_inlocs(struct ir3_context *ctx)
{
struct ir3_shader_variant *so = ctx->so;
uint8_t used_components[so->inputs_count];
memset(used_components, 0, sizeof(used_components));
/*
* First Step: scan shader to find which bary.f/ldlv remain:
*/
foreach_block (block, &ctx->ir->block_list) {
foreach_instr (instr, &block->instr_list) {
if (is_input(instr)) {
unsigned inloc = instr->srcs[0]->iim_val;
unsigned i = inloc / 4;
unsigned j = inloc % 4;
compile_assert(ctx, instr->srcs[0]->flags & IR3_REG_IMMED);
compile_assert(ctx, i < so->inputs_count);
used_components[i] |= 1 << j;
} else if (instr->opc == OPC_META_TEX_PREFETCH) {
for (int n = 0; n < 2; n++) {
unsigned inloc = instr->prefetch.input_offset + n;
unsigned i = inloc / 4;
unsigned j = inloc % 4;
compile_assert(ctx, i < so->inputs_count);
used_components[i] |= 1 << j;
}
}
}
}
/*
* Second Step: reassign varying inloc/slots:
*/
unsigned inloc = 0;
/* for clip+cull distances, unused components can't be eliminated because
* they're read by fixed-function, even if there's a hole. Note that
* clip/cull distance arrays must be declared in the FS, so we can just
* use the NIR clip/cull distances to avoid reading ucp_enables in the
* shader key.
*/
unsigned clip_cull_mask = so->clip_mask | so->cull_mask;
for (unsigned i = 0; i < so->inputs_count; i++) {
unsigned compmask = 0, maxcomp = 0;
so->inputs[i].inloc = inloc;
so->inputs[i].bary = false;
if (so->inputs[i].slot == VARYING_SLOT_CLIP_DIST0 ||
so->inputs[i].slot == VARYING_SLOT_CLIP_DIST1) {
if (so->inputs[i].slot == VARYING_SLOT_CLIP_DIST0)
compmask = clip_cull_mask & 0xf;
else
compmask = clip_cull_mask >> 4;
used_components[i] = compmask;
}
for (unsigned j = 0; j < 4; j++) {
if (!(used_components[i] & (1 << j)))
continue;
compmask |= (1 << j);
maxcomp = j + 1;
/* at this point, since used_components[i] mask is only
* considering varyings (ie. not sysvals) we know this
* is a varying:
*/
so->inputs[i].bary = true;
}
if (so->inputs[i].bary) {
so->varying_in++;
so->inputs[i].compmask = (1 << maxcomp) - 1;
inloc += maxcomp;
}
}
/*
* Third Step: reassign packed inloc's:
*/
foreach_block (block, &ctx->ir->block_list) {
foreach_instr (instr, &block->instr_list) {
if (is_input(instr)) {
unsigned inloc = instr->srcs[0]->iim_val;
unsigned i = inloc / 4;
unsigned j = inloc % 4;
instr->srcs[0]->iim_val = so->inputs[i].inloc + j;
} else if (instr->opc == OPC_META_TEX_PREFETCH) {
unsigned i = instr->prefetch.input_offset / 4;
unsigned j = instr->prefetch.input_offset % 4;
instr->prefetch.input_offset = so->inputs[i].inloc + j;
}
}
}
}
static void
setup_output(struct ir3_context *ctx, nir_intrinsic_instr *intr)
{
struct ir3_shader_variant *so = ctx->so;
nir_io_semantics io = nir_intrinsic_io_semantics(intr);
compile_assert(ctx, nir_src_is_const(intr->src[1]));
unsigned offset = nir_src_as_uint(intr->src[1]);
unsigned n = nir_intrinsic_base(intr) + offset;
unsigned frac = nir_intrinsic_component(intr);
unsigned ncomp = nir_intrinsic_src_components(intr, 0);
/* For per-view variables, each user-facing slot corresponds to multiple
* views, each with a corresponding driver_location, and the offset is for
* the driver_location. To properly figure out of the slot, we'd need to
* plumb through the number of views. However, for now we only use
* per-view with gl_Position, so we assume that the variable is not an
* array or matrix (so there are no indirect accesses to the variable
* itself) and the indirect offset corresponds to the view.
*/
unsigned slot = io.location + (io.per_view ? 0 : offset);
if (ctx->so->type == MESA_SHADER_FRAGMENT) {
switch (slot) {
case FRAG_RESULT_DEPTH:
so->writes_pos = true;
break;
case FRAG_RESULT_COLOR:
if (!ctx->s->info.fs.color_is_dual_source) {
so->color0_mrt = 1;
} else {
slot = FRAG_RESULT_DATA0 + io.dual_source_blend_index;
}
break;
case FRAG_RESULT_SAMPLE_MASK:
so->writes_smask = true;
break;
case FRAG_RESULT_STENCIL:
so->writes_stencilref = true;
break;
default:
slot += io.dual_source_blend_index; /* For dual-src blend */
if (slot >= FRAG_RESULT_DATA0)
break;
ir3_context_error(ctx, "unknown FS output name: %s\n",
gl_frag_result_name(slot));
}
} else if (ctx->so->type == MESA_SHADER_VERTEX ||
ctx->so->type == MESA_SHADER_TESS_EVAL ||
ctx->so->type == MESA_SHADER_GEOMETRY) {
switch (slot) {
case VARYING_SLOT_POS:
so->writes_pos = true;
break;
case VARYING_SLOT_PSIZ:
so->writes_psize = true;
break;
case VARYING_SLOT_PRIMITIVE_ID:
case VARYING_SLOT_GS_VERTEX_FLAGS_IR3:
assert(ctx->so->type == MESA_SHADER_GEOMETRY);
FALLTHROUGH;
case VARYING_SLOT_COL0:
case VARYING_SLOT_COL1:
case VARYING_SLOT_BFC0:
case VARYING_SLOT_BFC1:
case VARYING_SLOT_FOGC:
case VARYING_SLOT_CLIP_DIST0:
case VARYING_SLOT_CLIP_DIST1:
case VARYING_SLOT_CLIP_VERTEX:
case VARYING_SLOT_LAYER:
case VARYING_SLOT_VIEWPORT:
break;
default:
if (slot >= VARYING_SLOT_VAR0)
break;
if ((VARYING_SLOT_TEX0 <= slot) && (slot <= VARYING_SLOT_TEX7))
break;
ir3_context_error(ctx, "unknown %s shader output name: %s\n",
_mesa_shader_stage_to_string(ctx->so->type),
gl_varying_slot_name_for_stage(slot, ctx->so->type));
}
} else {
ir3_context_error(ctx, "unknown shader type: %d\n", ctx->so->type);
}
so->outputs_count = MAX2(so->outputs_count, n + 1);
compile_assert(ctx, so->outputs_count <= ARRAY_SIZE(so->outputs));
so->outputs[n].slot = slot;
if (io.per_view)
so->outputs[n].view = offset;
for (int i = 0; i < ncomp; i++) {
unsigned idx = (n * 4) + i + frac;
compile_assert(ctx, idx < ctx->noutputs);
ctx->outputs[idx] = create_immed(ctx->block, fui(0.0));
}
/* if varying packing doesn't happen, we could end up in a situation
* with "holes" in the output, and since the per-generation code that
* sets up varying linkage registers doesn't expect to have more than
* one varying per vec4 slot, pad the holes.
*
* Note that this should probably generate a performance warning of
* some sort.
*/
for (int i = 0; i < frac; i++) {
unsigned idx = (n * 4) + i;
if (!ctx->outputs[idx]) {
ctx->outputs[idx] = create_immed(ctx->block, fui(0.0));
}
}
struct ir3_instruction *const *src = ir3_get_src(ctx, &intr->src[0]);
for (int i = 0; i < ncomp; i++) {
unsigned idx = (n * 4) + i + frac;
ctx->outputs[idx] = src[i];
}
}
static bool
uses_load_input(struct ir3_shader_variant *so)
{
return so->type == MESA_SHADER_VERTEX || so->type == MESA_SHADER_FRAGMENT;
}
static bool
uses_store_output(struct ir3_shader_variant *so)
{
switch (so->type) {
case MESA_SHADER_VERTEX:
return !so->key.has_gs && !so->key.tessellation;
case MESA_SHADER_TESS_EVAL:
return !so->key.has_gs;
case MESA_SHADER_GEOMETRY:
case MESA_SHADER_FRAGMENT:
return true;
case MESA_SHADER_TESS_CTRL:
case MESA_SHADER_COMPUTE:
case MESA_SHADER_KERNEL:
return false;
default:
unreachable("unknown stage");
}
}
static void
emit_instructions(struct ir3_context *ctx)
{
nir_function_impl *fxn = nir_shader_get_entrypoint(ctx->s);
/* some varying setup which can't be done in setup_input(): */
if (ctx->so->type == MESA_SHADER_FRAGMENT) {
nir_foreach_shader_in_variable (var, ctx->s) {
/* if any varyings have 'sample' qualifer, that triggers us
* to run in per-sample mode:
*/
if (var->data.sample)
ctx->so->per_samp = true;
/* set rasterflat flag for front/back color */
if (var->data.interpolation == INTERP_MODE_NONE) {
switch (var->data.location) {
case VARYING_SLOT_COL0:
case VARYING_SLOT_COL1:
case VARYING_SLOT_BFC0:
case VARYING_SLOT_BFC1:
ctx->so->inputs[var->data.driver_location].rasterflat = true;
break;
default:
break;
}
}
}
}
if (uses_load_input(ctx->so)) {
ctx->so->inputs_count = ctx->s->num_inputs;
compile_assert(ctx, ctx->so->inputs_count < ARRAY_SIZE(ctx->so->inputs));
ctx->ninputs = ctx->s->num_inputs * 4;
ctx->inputs = rzalloc_array(ctx, struct ir3_instruction *, ctx->ninputs);
} else {
ctx->ninputs = 0;
ctx->so->inputs_count = 0;
}
if (uses_store_output(ctx->so)) {
ctx->noutputs = ctx->s->num_outputs * 4;
ctx->outputs =
rzalloc_array(ctx, struct ir3_instruction *, ctx->noutputs);
} else {
ctx->noutputs = 0;
}
ctx->ir = ir3_create(ctx->compiler, ctx->so);
/* Create inputs in first block: */
ctx->block = get_block(ctx, nir_start_block(fxn));
ctx->in_block = ctx->block;
/* for fragment shader, the vcoord input register is used as the
* base for bary.f varying fetch instrs:
*
* TODO defer creating ctx->ij_pixel and corresponding sysvals
* until emit_intrinsic when we know they are actually needed.
* For now, we defer creating ctx->ij_centroid, etc, since we
* only need ij_pixel for "old style" varying inputs (ie.
* tgsi_to_nir)
*/
if (ctx->so->type == MESA_SHADER_FRAGMENT) {
ctx->ij[IJ_PERSP_PIXEL] = create_input(ctx, 0x3);
}
/* Defer add_sysval_input() stuff until after setup_inputs(),
* because sysvals need to be appended after varyings:
*/
if (ctx->ij[IJ_PERSP_PIXEL]) {
add_sysval_input_compmask(ctx, SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL, 0x3,
ctx->ij[IJ_PERSP_PIXEL]);
}
/* Tesselation shaders always need primitive ID for indexing the
* BO. Geometry shaders don't always need it but when they do it has be
* delivered and unclobbered in the VS. To make things easy, we always
* make room for it in VS/DS.
*/
bool has_tess = ctx->so->key.tessellation != IR3_TESS_NONE;
bool has_gs = ctx->so->key.has_gs;
switch (ctx->so->type) {
case MESA_SHADER_VERTEX:
if (has_tess) {
ctx->tcs_header =
create_sysval_input(ctx, SYSTEM_VALUE_TCS_HEADER_IR3, 0x1);
ctx->rel_patch_id =
create_sysval_input(ctx, SYSTEM_VALUE_REL_PATCH_ID_IR3, 0x1);
ctx->primitive_id =
create_sysval_input(ctx, SYSTEM_VALUE_PRIMITIVE_ID, 0x1);
} else if (has_gs) {
ctx->gs_header =
create_sysval_input(ctx, SYSTEM_VALUE_GS_HEADER_IR3, 0x1);
ctx->primitive_id =
create_sysval_input(ctx, SYSTEM_VALUE_PRIMITIVE_ID, 0x1);
}
break;
case MESA_SHADER_TESS_CTRL:
ctx->tcs_header =
create_sysval_input(ctx, SYSTEM_VALUE_TCS_HEADER_IR3, 0x1);
ctx->rel_patch_id =
create_sysval_input(ctx, SYSTEM_VALUE_REL_PATCH_ID_IR3, 0x1);
break;
case MESA_SHADER_TESS_EVAL:
if (has_gs) {
ctx->gs_header =
create_sysval_input(ctx, SYSTEM_VALUE_GS_HEADER_IR3, 0x1);
ctx->primitive_id =
create_sysval_input(ctx, SYSTEM_VALUE_PRIMITIVE_ID, 0x1);
}
ctx->rel_patch_id =
create_sysval_input(ctx, SYSTEM_VALUE_REL_PATCH_ID_IR3, 0x1);
break;
case MESA_SHADER_GEOMETRY:
ctx->gs_header =
create_sysval_input(ctx, SYSTEM_VALUE_GS_HEADER_IR3, 0x1);
break;
default:
break;
}
/* Find # of samplers. Just assume that we'll be reading from images.. if
* it is write-only we don't have to count it, but after lowering derefs
* is too late to compact indices for that.
*/
ctx->so->num_samp =
BITSET_LAST_BIT(ctx->s->info.textures_used) + ctx->s->info.num_images;
/* Save off clip+cull information. Note that in OpenGL clip planes may
* be individually enabled/disabled, and some gens handle lowering in
* backend, so we also need to consider the shader key:
*/
ctx->so->clip_mask = ctx->so->key.ucp_enables |
MASK(ctx->s->info.clip_distance_array_size);
ctx->so->cull_mask = MASK(ctx->s->info.cull_distance_array_size)
<< ctx->s->info.clip_distance_array_size;
ctx->so->pvtmem_size = ctx->s->scratch_size;
ctx->so->shared_size = ctx->s->info.shared_size;
/* NOTE: need to do something more clever when we support >1 fxn */
nir_foreach_register (reg, &fxn->registers) {
ir3_declare_array(ctx, reg);
}
if (ctx->so->type == MESA_SHADER_TESS_CTRL &&
ctx->compiler->tess_use_shared) {
struct ir3_instruction *barrier = ir3_BAR(ctx->block);
barrier->flags = IR3_INSTR_SS | IR3_INSTR_SY;
barrier->barrier_class = IR3_BARRIER_EVERYTHING;
array_insert(ctx->block, ctx->block->keeps, barrier);
ctx->so->has_barrier = true;
}
/* And emit the body: */
ctx->impl = fxn;
emit_function(ctx, fxn);
}
/* Fixup tex sampler state for astc/srgb workaround instructions. We
* need to assign the tex state indexes for these after we know the
* max tex index.
*/
static void
fixup_astc_srgb(struct ir3_context *ctx)
{
struct ir3_shader_variant *so = ctx->so;
/* indexed by original tex idx, value is newly assigned alpha sampler
* state tex idx. Zero is invalid since there is at least one sampler
* if we get here.
*/
unsigned alt_tex_state[16] = {0};
unsigned tex_idx = ctx->max_texture_index + 1;
unsigned idx = 0;
so->astc_srgb.base = tex_idx;
for (unsigned i = 0; i < ctx->ir->astc_srgb_count; i++) {
struct ir3_instruction *sam = ctx->ir->astc_srgb[i];
compile_assert(ctx, sam->cat5.tex < ARRAY_SIZE(alt_tex_state));
if (alt_tex_state[sam->cat5.tex] == 0) {
/* assign new alternate/alpha tex state slot: */
alt_tex_state[sam->cat5.tex] = tex_idx++;
so->astc_srgb.orig_idx[idx++] = sam->cat5.tex;
so->astc_srgb.count++;
}
sam->cat5.tex = alt_tex_state[sam->cat5.tex];
}
}
/* Fixup tex sampler state for tg4 workaround instructions. We
* need to assign the tex state indexes for these after we know the
* max tex index.
*/
static void
fixup_tg4(struct ir3_context *ctx)
{
struct ir3_shader_variant *so = ctx->so;
/* indexed by original tex idx, value is newly assigned alpha sampler
* state tex idx. Zero is invalid since there is at least one sampler
* if we get here.
*/
unsigned alt_tex_state[16] = {0};
unsigned tex_idx = ctx->max_texture_index + so->astc_srgb.count + 1;
unsigned idx = 0;
so->tg4.base = tex_idx;
for (unsigned i = 0; i < ctx->ir->tg4_count; i++) {
struct ir3_instruction *sam = ctx->ir->tg4[i];
compile_assert(ctx, sam->cat5.tex < ARRAY_SIZE(alt_tex_state));
if (alt_tex_state[sam->cat5.tex] == 0) {
/* assign new alternate/alpha tex state slot: */
alt_tex_state[sam->cat5.tex] = tex_idx++;
so->tg4.orig_idx[idx++] = sam->cat5.tex;
so->tg4.count++;
}
sam->cat5.tex = alt_tex_state[sam->cat5.tex];
}
}
static bool
output_slot_used_for_binning(gl_varying_slot slot)
{
return slot == VARYING_SLOT_POS || slot == VARYING_SLOT_PSIZ ||
slot == VARYING_SLOT_CLIP_DIST0 || slot == VARYING_SLOT_CLIP_DIST1 ||
slot == VARYING_SLOT_VIEWPORT;
}
static struct ir3_instruction *
find_end(struct ir3 *ir)
{
foreach_block_rev (block, &ir->block_list) {
foreach_instr_rev (instr, &block->instr_list) {
if (instr->opc == OPC_END || instr->opc == OPC_CHMASK)
return instr;
}
}
unreachable("couldn't find end instruction");
}
static void
fixup_binning_pass(struct ir3_context *ctx, struct ir3_instruction *end)
{
struct ir3_shader_variant *so = ctx->so;
unsigned i, j;
/* first pass, remove unused outputs from the IR level outputs: */
for (i = 0, j = 0; i < end->srcs_count; i++) {
unsigned outidx = end->end.outidxs[i];
unsigned slot = so->outputs[outidx].slot;
if (output_slot_used_for_binning(slot)) {
end->srcs[j] = end->srcs[i];
end->end.outidxs[j] = end->end.outidxs[i];
j++;
}
}
end->srcs_count = j;
/* second pass, cleanup the unused slots in ir3_shader_variant::outputs
* table:
*/
for (i = 0, j = 0; i < so->outputs_count; i++) {
unsigned slot = so->outputs[i].slot;
if (output_slot_used_for_binning(slot)) {
so->outputs[j] = so->outputs[i];
/* fixup outidx to point to new output table entry: */
for (unsigned k = 0; k < end->srcs_count; k++) {
if (end->end.outidxs[k] == i) {
end->end.outidxs[k] = j;
break;
}
}
j++;
}
}
so->outputs_count = j;
}
static void
collect_tex_prefetches(struct ir3_context *ctx, struct ir3 *ir)
{
unsigned idx = 0;
/* Collect sampling instructions eligible for pre-dispatch. */
foreach_block (block, &ir->block_list) {
foreach_instr_safe (instr, &block->instr_list) {
if (instr->opc == OPC_META_TEX_PREFETCH) {
assert(idx < ARRAY_SIZE(ctx->so->sampler_prefetch));
struct ir3_sampler_prefetch *fetch =
&ctx->so->sampler_prefetch[idx];
idx++;
if (instr->flags & IR3_INSTR_B) {
fetch->cmd = IR3_SAMPLER_BINDLESS_PREFETCH_CMD;
/* In bindless mode, the index is actually the base */
fetch->tex_id = instr->prefetch.tex_base;
fetch->samp_id = instr->prefetch.samp_base;
fetch->tex_bindless_id = instr->prefetch.tex;
fetch->samp_bindless_id = instr->prefetch.samp;
} else {
fetch->cmd = IR3_SAMPLER_PREFETCH_CMD;
fetch->tex_id = instr->prefetch.tex;
fetch->samp_id = instr->prefetch.samp;
}
fetch->wrmask = instr->dsts[0]->wrmask;
fetch->dst = instr->dsts[0]->num;
fetch->src = instr->prefetch.input_offset;
/* These are the limits on a5xx/a6xx, we might need to
* revisit if SP_FS_PREFETCH[n] changes on later gens:
*/
assert(fetch->dst <= 0x3f);
assert(fetch->tex_id <= 0x1f);
assert(fetch->samp_id <= 0xf);
ctx->so->total_in =
MAX2(ctx->so->total_in, instr->prefetch.input_offset + 2);
fetch->half_precision = !!(instr->dsts[0]->flags & IR3_REG_HALF);
/* Remove the prefetch placeholder instruction: */
list_delinit(&instr->node);
}
}
}
}
int
ir3_compile_shader_nir(struct ir3_compiler *compiler,
struct ir3_shader *shader,
struct ir3_shader_variant *so)
{
struct ir3_context *ctx;
struct ir3 *ir;
int ret = 0, max_bary;
bool progress;
assert(!so->ir);
ctx = ir3_context_init(compiler, shader, so);
if (!ctx) {
DBG("INIT failed!");
ret = -1;
goto out;
}
emit_instructions(ctx);
if (ctx->error) {
DBG("EMIT failed!");
ret = -1;
goto out;
}
ir = so->ir = ctx->ir;
if (gl_shader_stage_is_compute(so->type)) {
so->local_size[0] = ctx->s->info.workgroup_size[0];
so->local_size[1] = ctx->s->info.workgroup_size[1];
so->local_size[2] = ctx->s->info.workgroup_size[2];
so->local_size_variable = ctx->s->info.workgroup_size_variable;
}
/* Vertex shaders in a tessellation or geometry pipeline treat END as a
* NOP and has an epilogue that writes the VS outputs to local storage, to
* be read by the HS. Then it resets execution mask (chmask) and chains
* to the next shader (chsh). There are also a few output values which we
* must send to the next stage via registers, and in order for both stages
* to agree on the register used we must force these to be in specific
* registers.
*/
if ((so->type == MESA_SHADER_VERTEX &&
(so->key.has_gs || so->key.tessellation)) ||
(so->type == MESA_SHADER_TESS_EVAL && so->key.has_gs)) {
struct ir3_instruction *outputs[3];
unsigned outidxs[3];
unsigned regids[3];
unsigned outputs_count = 0;
if (ctx->primitive_id) {
unsigned n = so->outputs_count++;
so->outputs[n].slot = VARYING_SLOT_PRIMITIVE_ID;
struct ir3_instruction *out = ir3_collect(ctx->block, ctx->primitive_id);
outputs[outputs_count] = out;
outidxs[outputs_count] = n;
if (so->type == MESA_SHADER_VERTEX && ctx->rel_patch_id)
regids[outputs_count] = regid(0, 2);
else
regids[outputs_count] = regid(0, 1);
outputs_count++;
}
if (so->type == MESA_SHADER_VERTEX && ctx->rel_patch_id) {
unsigned n = so->outputs_count++;
so->outputs[n].slot = VARYING_SLOT_REL_PATCH_ID_IR3;
struct ir3_instruction *out = ir3_collect(ctx->block, ctx->rel_patch_id);
outputs[outputs_count] = out;
outidxs[outputs_count] = n;
regids[outputs_count] = regid(0, 1);
outputs_count++;
}
if (ctx->gs_header) {
unsigned n = so->outputs_count++;
so->outputs[n].slot = VARYING_SLOT_GS_HEADER_IR3;
struct ir3_instruction *out = ir3_collect(ctx->block, ctx->gs_header);
outputs[outputs_count] = out;
outidxs[outputs_count] = n;
regids[outputs_count] = regid(0, 0);
outputs_count++;
}
if (ctx->tcs_header) {
unsigned n = so->outputs_count++;
so->outputs[n].slot = VARYING_SLOT_TCS_HEADER_IR3;
struct ir3_instruction *out = ir3_collect(ctx->block, ctx->tcs_header);
outputs[outputs_count] = out;
outidxs[outputs_count] = n;
regids[outputs_count] = regid(0, 0);
outputs_count++;
}
struct ir3_instruction *chmask =
ir3_instr_create(ctx->block, OPC_CHMASK, 0, outputs_count);
chmask->barrier_class = IR3_BARRIER_EVERYTHING;
chmask->barrier_conflict = IR3_BARRIER_EVERYTHING;
for (unsigned i = 0; i < outputs_count; i++)
__ssa_src(chmask, outputs[i], 0)->num = regids[i];
chmask->end.outidxs = ralloc_array(chmask, unsigned, outputs_count);
memcpy(chmask->end.outidxs, outidxs, sizeof(unsigned) * outputs_count);
array_insert(ctx->block, ctx->block->keeps, chmask);
struct ir3_instruction *chsh = ir3_CHSH(ctx->block);
chsh->barrier_class = IR3_BARRIER_EVERYTHING;
chsh->barrier_conflict = IR3_BARRIER_EVERYTHING;
} else {
assert((ctx->noutputs % 4) == 0);
unsigned outidxs[ctx->noutputs / 4];
struct ir3_instruction *outputs[ctx->noutputs / 4];
unsigned outputs_count = 0;
struct ir3_block *b = ctx->block;
/* Insert these collect's in the block before the end-block if
* possible, so that any moves they generate can be shuffled around to
* reduce nop's:
*/
if (ctx->block->predecessors_count == 1)
b = ctx->block->predecessors[0];
/* Setup IR level outputs, which are "collects" that gather
* the scalar components of outputs.
*/
for (unsigned i = 0; i < ctx->noutputs; i += 4) {
unsigned ncomp = 0;
/* figure out the # of components written:
*
* TODO do we need to handle holes, ie. if .x and .z
* components written, but .y component not written?
*/
for (unsigned j = 0; j < 4; j++) {
if (!ctx->outputs[i + j])
break;
ncomp++;
}
/* Note that in some stages, like TCS, store_output is
* lowered to memory writes, so no components of the
* are "written" from the PoV of traditional store-
* output instructions:
*/
if (!ncomp)
continue;
struct ir3_instruction *out =
ir3_create_collect(b, &ctx->outputs[i], ncomp);
int outidx = i / 4;
assert(outidx < so->outputs_count);
outidxs[outputs_count] = outidx;
outputs[outputs_count] = out;
outputs_count++;
}
/* for a6xx+, binning and draw pass VS use same VBO state, so we
* need to make sure not to remove any inputs that are used by
* the nonbinning VS.
*/
if (ctx->compiler->gen >= 6 && so->binning_pass &&
so->type == MESA_SHADER_VERTEX) {
for (int i = 0; i < ctx->ninputs; i++) {
struct ir3_instruction *in = ctx->inputs[i];
if (!in)
continue;
unsigned n = i / 4;
unsigned c = i % 4;
assert(n < so->nonbinning->inputs_count);
if (so->nonbinning->inputs[n].sysval)
continue;
/* be sure to keep inputs, even if only used in VS */
if (so->nonbinning->inputs[n].compmask & (1 << c))
array_insert(in->block, in->block->keeps, in);
}
}
struct ir3_instruction *end =
ir3_instr_create(ctx->block, OPC_END, 0, outputs_count);
for (unsigned i = 0; i < outputs_count; i++) {
__ssa_src(end, outputs[i], 0);
}
end->end.outidxs = ralloc_array(end, unsigned, outputs_count);
memcpy(end->end.outidxs, outidxs, sizeof(unsigned) * outputs_count);
array_insert(ctx->block, ctx->block->keeps, end);
/* at this point, for binning pass, throw away unneeded outputs: */
if (so->binning_pass && (ctx->compiler->gen < 6))
fixup_binning_pass(ctx, end);
}
ir3_debug_print(ir, "AFTER: nir->ir3");
ir3_validate(ir);
IR3_PASS(ir, ir3_remove_unreachable);
IR3_PASS(ir, ir3_array_to_ssa);
do {
progress = false;
/* the folding doesn't seem to work reliably on a4xx */
if (ctx->compiler->gen != 4)
progress |= IR3_PASS(ir, ir3_cf);
progress |= IR3_PASS(ir, ir3_cp, so);
progress |= IR3_PASS(ir, ir3_cse);
progress |= IR3_PASS(ir, ir3_dce, so);
} while (progress);
/* at this point, for binning pass, throw away unneeded outputs:
* Note that for a6xx and later, we do this after ir3_cp to ensure
* that the uniform/constant layout for BS and VS matches, so that
* we can re-use same VS_CONST state group.
*/
if (so->binning_pass && (ctx->compiler->gen >= 6)) {
fixup_binning_pass(ctx, find_end(ctx->so->ir));
/* cleanup the result of removing unneeded outputs: */
while (IR3_PASS(ir, ir3_dce, so)) {
}
}
IR3_PASS(ir, ir3_sched_add_deps);
/* At this point, all the dead code should be long gone: */
assert(!IR3_PASS(ir, ir3_dce, so));
ret = ir3_sched(ir);
if (ret) {
DBG("SCHED failed!");
goto out;
}
ir3_debug_print(ir, "AFTER: ir3_sched");
/* Pre-assign VS inputs on a6xx+ binning pass shader, to align
* with draw pass VS, so binning and draw pass can both use the
* same VBO state.
*
* Note that VS inputs are expected to be full precision.
*/
bool pre_assign_inputs = (ir->compiler->gen >= 6) &&
(ir->type == MESA_SHADER_VERTEX) &&
so->binning_pass;
if (pre_assign_inputs) {
foreach_input (in, ir) {
assert(in->opc == OPC_META_INPUT);
unsigned inidx = in->input.inidx;
in->dsts[0]->num = so->nonbinning->inputs[inidx].regid;
}
} else if (ctx->tcs_header) {
/* We need to have these values in the same registers between VS and TCS
* since the VS chains to TCS and doesn't get the sysvals redelivered.
*/
ctx->tcs_header->dsts[0]->num = regid(0, 0);
ctx->rel_patch_id->dsts[0]->num = regid(0, 1);
if (ctx->primitive_id)
ctx->primitive_id->dsts[0]->num = regid(0, 2);
} else if (ctx->gs_header) {
/* We need to have these values in the same registers between producer
* (VS or DS) and GS since the producer chains to GS and doesn't get
* the sysvals redelivered.
*/
ctx->gs_header->dsts[0]->num = regid(0, 0);
if (ctx->primitive_id)
ctx->primitive_id->dsts[0]->num = regid(0, 1);
} else if (so->num_sampler_prefetch) {
assert(so->type == MESA_SHADER_FRAGMENT);
int idx = 0;
foreach_input (instr, ir) {
if (instr->input.sysval != SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL)
continue;
assert(idx < 2);
instr->dsts[0]->num = idx;
idx++;
}
}
ret = ir3_ra(so);
if (ret) {
mesa_loge("ir3_ra() failed!");
goto out;
}
IR3_PASS(ir, ir3_postsched, so);
IR3_PASS(ir, ir3_legalize_relative);
IR3_PASS(ir, ir3_lower_subgroups);
if (so->type == MESA_SHADER_FRAGMENT)
pack_inlocs(ctx);
/*
* Fixup inputs/outputs to point to the actual registers assigned:
*
* 1) initialize to r63.x (invalid/unused)
* 2) iterate IR level inputs/outputs and update the variants
* inputs/outputs table based on the assigned registers for
* the remaining inputs/outputs.
*/
for (unsigned i = 0; i < so->inputs_count; i++)
so->inputs[i].regid = INVALID_REG;
for (unsigned i = 0; i < so->outputs_count; i++)
so->outputs[i].regid = INVALID_REG;
struct ir3_instruction *end = find_end(so->ir);
for (unsigned i = 0; i < end->srcs_count; i++) {
unsigned outidx = end->end.outidxs[i];
struct ir3_register *reg = end->srcs[i];
so->outputs[outidx].regid = reg->num;
so->outputs[outidx].half = !!(reg->flags & IR3_REG_HALF);
}
foreach_input (in, ir) {
assert(in->opc == OPC_META_INPUT);
unsigned inidx = in->input.inidx;
if (pre_assign_inputs && !so->inputs[inidx].sysval) {
if (VALIDREG(so->nonbinning->inputs[inidx].regid)) {
compile_assert(
ctx, in->dsts[0]->num == so->nonbinning->inputs[inidx].regid);
compile_assert(ctx, !!(in->dsts[0]->flags & IR3_REG_HALF) ==
so->nonbinning->inputs[inidx].half);
}
so->inputs[inidx].regid = so->nonbinning->inputs[inidx].regid;
so->inputs[inidx].half = so->nonbinning->inputs[inidx].half;
} else {
so->inputs[inidx].regid = in->dsts[0]->num;
so->inputs[inidx].half = !!(in->dsts[0]->flags & IR3_REG_HALF);
}
}
if (ctx->astc_srgb)
fixup_astc_srgb(ctx);
if (ctx->compiler->gen == 4 && ctx->s->info.uses_texture_gather)
fixup_tg4(ctx);
/* We need to do legalize after (for frag shader's) the "bary.f"
* offsets (inloc) have been assigned.
*/
IR3_PASS(ir, ir3_legalize, so, &max_bary);
/* Set (ss)(sy) on first TCS and GEOMETRY instructions, since we don't
* know what we might have to wait on when coming in from VS chsh.
*/
if (so->type == MESA_SHADER_TESS_CTRL || so->type == MESA_SHADER_GEOMETRY) {
foreach_block (block, &ir->block_list) {
foreach_instr (instr, &block->instr_list) {
instr->flags |= IR3_INSTR_SS | IR3_INSTR_SY;
break;
}
}
}
so->branchstack = ctx->max_stack;
/* Note that max_bary counts inputs that are not bary.f'd for FS: */
if (so->type == MESA_SHADER_FRAGMENT)
so->total_in = max_bary + 1;
/* Collect sampling instructions eligible for pre-dispatch. */
collect_tex_prefetches(ctx, ir);
if (so->type == MESA_SHADER_FRAGMENT &&
ctx->s->info.fs.needs_quad_helper_invocations)
so->need_pixlod = true;
if ((ctx->so->type == MESA_SHADER_FRAGMENT) &&
!ctx->s->info.fs.early_fragment_tests)
ctx->so->no_earlyz |= ctx->s->info.writes_memory;
out:
if (ret) {
if (so->ir)
ir3_destroy(so->ir);
so->ir = NULL;
}
ir3_context_free(ctx);
return ret;
}
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