230 lines
8.9 KiB
C
230 lines
8.9 KiB
C
/*
|
|
* Copyright © 2018 Intel Corporation
|
|
* Copyright © 2018 Broadcom
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include "v3d_compiler.h"
|
|
#include "compiler/nir/nir_builder.h"
|
|
#include "compiler/nir/nir_format_convert.h"
|
|
|
|
/** @file v3d_nir_lower_image_load_store.c
|
|
*
|
|
* Performs any necessary lowering of GL_ARB_shader_image_load_store
|
|
* operations.
|
|
*
|
|
* On V3D 4.x, we just need to do format conversion for stores such that the
|
|
* GPU can effectively memcpy the arguments (in increments of 32-bit words)
|
|
* into the texel. Loads are the same as texturing, where we may need to
|
|
* unpack from 16-bit ints or floats.
|
|
*
|
|
* On V3D 3.x, to implement image load store we would need to do manual tiling
|
|
* calculations and load/store using the TMU general memory access path.
|
|
*/
|
|
|
|
bool
|
|
v3d_gl_format_is_return_32(enum pipe_format format)
|
|
{
|
|
const struct util_format_description *desc =
|
|
util_format_description(format);
|
|
const struct util_format_channel_description *chan = &desc->channel[0];
|
|
|
|
return chan->size > 16 || (chan->size == 16 && chan->normalized);
|
|
}
|
|
|
|
/* Packs a 32-bit vector of colors in the range [0, (1 << bits[i]) - 1] to a
|
|
* 32-bit SSA value, with as many channels as necessary to store all the bits
|
|
*/
|
|
static nir_ssa_def *
|
|
pack_bits(nir_builder *b, nir_ssa_def *color, const unsigned *bits,
|
|
int num_components, bool mask)
|
|
{
|
|
nir_ssa_def *results[4];
|
|
int offset = 0;
|
|
for (int i = 0; i < num_components; i++) {
|
|
nir_ssa_def *chan = nir_channel(b, color, i);
|
|
|
|
/* Channels being stored shouldn't cross a 32-bit boundary. */
|
|
assert((offset & ~31) == ((offset + bits[i] - 1) & ~31));
|
|
|
|
if (mask) {
|
|
chan = nir_iand(b, chan,
|
|
nir_imm_int(b, (1 << bits[i]) - 1));
|
|
}
|
|
|
|
if (offset % 32 == 0) {
|
|
results[offset / 32] = chan;
|
|
} else {
|
|
results[offset / 32] =
|
|
nir_ior(b, results[offset / 32],
|
|
nir_ishl(b, chan,
|
|
nir_imm_int(b, offset % 32)));
|
|
}
|
|
offset += bits[i];
|
|
}
|
|
|
|
return nir_vec(b, results, DIV_ROUND_UP(offset, 32));
|
|
}
|
|
|
|
static bool
|
|
v3d_nir_lower_image_store(nir_builder *b, nir_intrinsic_instr *instr)
|
|
{
|
|
enum pipe_format format = nir_intrinsic_format(instr);
|
|
assert(format != PIPE_FORMAT_NONE);
|
|
const struct util_format_description *desc =
|
|
util_format_description(format);
|
|
const struct util_format_channel_description *r_chan = &desc->channel[0];
|
|
unsigned num_components = util_format_get_nr_components(format);
|
|
|
|
b->cursor = nir_before_instr(&instr->instr);
|
|
|
|
nir_ssa_def *color = nir_channels(b,
|
|
nir_ssa_for_src(b, instr->src[3], 4),
|
|
(1 << num_components) - 1);
|
|
nir_ssa_def *formatted = NULL;
|
|
|
|
if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
|
|
formatted = nir_format_pack_11f11f10f(b, color);
|
|
} else if (format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
|
|
formatted = nir_format_pack_r9g9b9e5(b, color);
|
|
} else if (r_chan->size == 32) {
|
|
/* For 32-bit formats, we just have to move the vector
|
|
* across (possibly reducing the number of channels).
|
|
*/
|
|
formatted = color;
|
|
} else {
|
|
static const unsigned bits_8[4] = {8, 8, 8, 8};
|
|
static const unsigned bits_16[4] = {16, 16, 16, 16};
|
|
static const unsigned bits_1010102[4] = {10, 10, 10, 2};
|
|
const unsigned *bits;
|
|
|
|
switch (r_chan->size) {
|
|
case 8:
|
|
bits = bits_8;
|
|
break;
|
|
case 10:
|
|
bits = bits_1010102;
|
|
break;
|
|
case 16:
|
|
bits = bits_16;
|
|
break;
|
|
default:
|
|
unreachable("unrecognized bits");
|
|
}
|
|
|
|
bool pack_mask = false;
|
|
if (r_chan->pure_integer &&
|
|
r_chan->type == UTIL_FORMAT_TYPE_SIGNED) {
|
|
/* We don't need to do any conversion or clamping in this case */
|
|
formatted = color;
|
|
pack_mask = true;
|
|
} else if (r_chan->pure_integer &&
|
|
r_chan->type == UTIL_FORMAT_TYPE_UNSIGNED) {
|
|
/* We don't need to do any conversion or clamping in this case */
|
|
formatted = color;
|
|
} else if (r_chan->normalized &&
|
|
r_chan->type == UTIL_FORMAT_TYPE_SIGNED) {
|
|
formatted = nir_format_float_to_snorm(b, color, bits);
|
|
pack_mask = true;
|
|
} else if (r_chan->normalized &&
|
|
r_chan->type == UTIL_FORMAT_TYPE_UNSIGNED) {
|
|
formatted = nir_format_float_to_unorm(b, color, bits);
|
|
} else {
|
|
assert(r_chan->size == 16);
|
|
assert(r_chan->type == UTIL_FORMAT_TYPE_FLOAT);
|
|
formatted = nir_format_float_to_half(b, color);
|
|
}
|
|
|
|
formatted = pack_bits(b, formatted, bits, num_components,
|
|
pack_mask);
|
|
}
|
|
|
|
nir_instr_rewrite_src(&instr->instr, &instr->src[3],
|
|
nir_src_for_ssa(formatted));
|
|
instr->num_components = formatted->num_components;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
v3d_nir_lower_image_load(nir_builder *b, nir_intrinsic_instr *instr)
|
|
{
|
|
static const unsigned bits16[] = {16, 16, 16, 16};
|
|
enum pipe_format format = nir_intrinsic_format(instr);
|
|
|
|
if (v3d_gl_format_is_return_32(format))
|
|
return false;
|
|
|
|
b->cursor = nir_after_instr(&instr->instr);
|
|
|
|
assert(instr->dest.is_ssa);
|
|
nir_ssa_def *result = &instr->dest.ssa;
|
|
if (util_format_is_pure_uint(format)) {
|
|
result = nir_format_unpack_uint(b, result, bits16, 4);
|
|
} else if (util_format_is_pure_sint(format)) {
|
|
result = nir_format_unpack_sint(b, result, bits16, 4);
|
|
} else {
|
|
nir_ssa_def *rg = nir_channel(b, result, 0);
|
|
nir_ssa_def *ba = nir_channel(b, result, 1);
|
|
result = nir_vec4(b,
|
|
nir_unpack_half_2x16_split_x(b, rg),
|
|
nir_unpack_half_2x16_split_y(b, rg),
|
|
nir_unpack_half_2x16_split_x(b, ba),
|
|
nir_unpack_half_2x16_split_y(b, ba));
|
|
}
|
|
|
|
nir_ssa_def_rewrite_uses_after(&instr->dest.ssa, result,
|
|
result->parent_instr);
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
v3d_nir_lower_image_load_store_cb(nir_builder *b,
|
|
nir_instr *instr,
|
|
void *_state)
|
|
{
|
|
if (instr->type != nir_instr_type_intrinsic)
|
|
return false;
|
|
|
|
nir_intrinsic_instr *intr =
|
|
nir_instr_as_intrinsic(instr);
|
|
|
|
switch (intr->intrinsic) {
|
|
case nir_intrinsic_image_load:
|
|
return v3d_nir_lower_image_load(b, intr);
|
|
case nir_intrinsic_image_store:
|
|
return v3d_nir_lower_image_store(b, intr);
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
v3d_nir_lower_image_load_store(nir_shader *s)
|
|
{
|
|
return nir_shader_instructions_pass(s, v3d_nir_lower_image_load_store_cb,
|
|
nir_metadata_block_index |
|
|
nir_metadata_dominance, NULL);
|
|
}
|