362 lines
12 KiB
C
362 lines
12 KiB
C
/**************************************************************************
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*
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* Copyright 2022 Red Hat
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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**************************************************************************/
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#include "lp_bld_nir.h"
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#include "lp_bld_init.h"
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#include "lp_bld_const.h"
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#include "lp_bld_flow.h"
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#include "lp_bld_struct.h"
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#include "lp_bld_swizzle.h"
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#include "lp_bld_debug.h"
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#include "util/u_math.h"
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static LLVMValueRef
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swizzle_aos(struct lp_build_nir_context *bld_base,
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LLVMValueRef a,
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unsigned swizzle_x,
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unsigned swizzle_y,
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unsigned swizzle_z,
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unsigned swizzle_w)
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{
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unsigned char swizzles[4];
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struct lp_build_nir_aos_context *bld = lp_nir_aos_context(bld_base);
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assert(swizzle_x < 4);
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assert(swizzle_y < 4);
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assert(swizzle_z < 4);
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assert(swizzle_w < 4);
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swizzles[bld->inv_swizzles[0]] = bld->swizzles[swizzle_x];
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swizzles[bld->inv_swizzles[1]] = bld->swizzles[swizzle_y];
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swizzles[bld->inv_swizzles[2]] = bld->swizzles[swizzle_z];
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swizzles[bld->inv_swizzles[3]] = bld->swizzles[swizzle_w];
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return lp_build_swizzle_aos(&bld->bld_base.base, a, swizzles);
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}
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LLVMValueRef
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lp_nir_aos_conv_const(struct gallivm_state *gallivm,
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LLVMValueRef constval, int nc)
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{
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LLVMValueRef elems[16];
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uint8_t val = 0;
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/* convert from 1..4 x f32 to 16 x unorm8 */
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for (unsigned i = 0; i < nc; i++) {
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LLVMValueRef value =
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LLVMBuildExtractElement(gallivm->builder, constval,
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lp_build_const_int32(gallivm, i), "");
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assert(LLVMIsConstant(value));
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unsigned uval = LLVMConstIntGetZExtValue(value);
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float f = uif(uval);
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val = float_to_ubyte(f);
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for (unsigned j = 0; j < 4; j++) {
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elems[j * 4 + i] =
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LLVMConstInt(LLVMInt8TypeInContext(gallivm->context), val, 0);
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}
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}
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for (unsigned i = nc; i < 4; i++) {
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for (unsigned j = 0; j < 4; j++) {
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elems[j * 4 + i] =
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LLVMConstInt(LLVMInt8TypeInContext(gallivm->context), val, 0);
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}
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}
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return LLVMConstVector(elems, 16);
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}
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static void
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init_var_slots(struct lp_build_nir_context *bld_base,
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nir_variable *var)
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{
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struct lp_build_nir_aos_context *bld =
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(struct lp_build_nir_aos_context *)bld_base;
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if (!bld->outputs)
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return;
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unsigned this_loc = var->data.driver_location;
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bld->outputs[this_loc] = lp_build_alloca(bld_base->base.gallivm,
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bld_base->base.vec_type,
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"output");
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}
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static void
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emit_var_decl(struct lp_build_nir_context *bld_base,
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nir_variable *var)
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{
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if (var->data.mode == nir_var_shader_out) {
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init_var_slots(bld_base, var);
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}
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}
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static void
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emit_load_var(struct lp_build_nir_context *bld_base,
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nir_variable_mode deref_mode,
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unsigned num_components,
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unsigned bit_size,
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nir_variable *var,
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unsigned vertex_index,
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LLVMValueRef indir_vertex_index,
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unsigned const_index,
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LLVMValueRef indir_index,
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LLVMValueRef result[NIR_MAX_VEC_COMPONENTS])
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{
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struct lp_build_nir_aos_context *bld =
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(struct lp_build_nir_aos_context *)bld_base;
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unsigned location = var->data.driver_location;
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if (deref_mode == nir_var_shader_in) {
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result[0] = bld->inputs[location];
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}
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}
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static void
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emit_store_var(struct lp_build_nir_context *bld_base,
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nir_variable_mode deref_mode,
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unsigned num_components,
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unsigned bit_size,
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nir_variable *var,
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unsigned writemask,
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LLVMValueRef indir_vertex_index,
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unsigned const_index,
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LLVMValueRef indir_index,
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LLVMValueRef dst)
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{
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struct lp_build_nir_aos_context *bld =
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(struct lp_build_nir_aos_context *)bld_base;
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struct gallivm_state *gallivm = bld_base->base.gallivm;
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unsigned location = var->data.driver_location;
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if (LLVMIsConstant(dst)) {
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dst = lp_nir_aos_conv_const(gallivm, dst, num_components);
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}
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if (deref_mode == nir_var_shader_out) {
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LLVMBuildStore(gallivm->builder, dst, bld->outputs[location]);
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}
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}
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static LLVMValueRef
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emit_load_reg(struct lp_build_nir_context *bld_base,
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struct lp_build_context *reg_bld,
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const nir_reg_src *reg,
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LLVMValueRef indir_src,
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LLVMValueRef reg_storage)
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{
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struct gallivm_state *gallivm = bld_base->base.gallivm;
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return LLVMBuildLoad(gallivm->builder, reg_storage, "");
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}
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static void
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emit_store_reg(struct lp_build_nir_context *bld_base,
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struct lp_build_context *reg_bld,
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const nir_reg_dest *reg,
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unsigned writemask,
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LLVMValueRef indir_src,
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LLVMValueRef reg_storage,
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LLVMValueRef dst[NIR_MAX_VEC_COMPONENTS])
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{
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struct gallivm_state *gallivm = bld_base->base.gallivm;
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if (LLVMIsConstant(dst[0]))
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dst[0] = lp_nir_aos_conv_const(gallivm, dst[0], 1);
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if (writemask == 0xf) {
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LLVMBuildStore(gallivm->builder, dst[0], reg_storage);
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return;
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}
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LLVMValueRef cur = LLVMBuildLoad(gallivm->builder, reg_storage, "");
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LLVMTypeRef i32t = LLVMInt32TypeInContext(gallivm->context);
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LLVMValueRef shuffles[LP_MAX_VECTOR_LENGTH];
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for (unsigned j = 0; j < 16; j++) {
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unsigned comp = j % 4;
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if (writemask & (1 << comp)) {
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shuffles[j] = LLVMConstInt(i32t, 16 + j, 0); // new val
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} else {
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shuffles[j] = LLVMConstInt(i32t, j, 0); // cur val
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}
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}
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cur = LLVMBuildShuffleVector(gallivm->builder, cur, dst[0],
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LLVMConstVector(shuffles, 16), "");
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LLVMBuildStore(gallivm->builder, cur, reg_storage);
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}
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static void
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emit_load_ubo(struct lp_build_nir_context *bld_base,
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unsigned nc,
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unsigned bit_size,
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bool offset_is_uniform,
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LLVMValueRef index,
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LLVMValueRef offset,
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LLVMValueRef result[NIR_MAX_VEC_COMPONENTS])
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{
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struct lp_build_nir_aos_context *bld =
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(struct lp_build_nir_aos_context *)bld_base;
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LLVMBuilderRef builder = bld_base->base.gallivm->builder;
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struct gallivm_state *gallivm = bld_base->base.gallivm;
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struct lp_type type = bld_base->base.type;
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LLVMValueRef res;
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res = bld->bld_base.base.undef;
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offset = LLVMBuildExtractElement(builder, offset,
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lp_build_const_int32(gallivm, 0), "");
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assert(LLVMIsConstant(offset));
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unsigned offset_val = LLVMConstIntGetZExtValue(offset) >> 2;
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for (unsigned chan = 0; chan < nc; ++chan) {
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LLVMValueRef this_offset = lp_build_const_int32(gallivm,
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offset_val + chan);
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LLVMValueRef scalar_ptr = LLVMBuildGEP(builder, bld->consts_ptr,
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&this_offset, 1, "");
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LLVMValueRef scalar = LLVMBuildLoad(builder, scalar_ptr, "");
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lp_build_name(scalar, "const[%u].%c", offset_val, "xyzw"[chan]);
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LLVMValueRef swizzle = lp_build_const_int32(bld->bld_base.base.gallivm,
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nc == 1 ? 0 : bld->swizzles[chan]);
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res = LLVMBuildInsertElement(builder, res, scalar, swizzle, "");
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}
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if (type.length > 4) {
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LLVMValueRef shuffles[LP_MAX_VECTOR_LENGTH];
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for (unsigned chan = 0; chan < nc; ++chan) {
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shuffles[chan] =
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lp_build_const_int32(bld->bld_base.base.gallivm, chan);
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}
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for (unsigned i = nc; i < type.length; ++i) {
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shuffles[i] = shuffles[i % nc];
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}
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res = LLVMBuildShuffleVector(builder, res, bld->bld_base.base.undef,
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LLVMConstVector(shuffles, type.length),
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"");
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}
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if (nc == 4)
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swizzle_aos(bld_base, res, 0, 1, 2, 3);
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result[0] = res;
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}
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static void
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emit_tex(struct lp_build_nir_context *bld_base,
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struct lp_sampler_params *params)
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{
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struct lp_build_nir_aos_context *bld =
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(struct lp_build_nir_aos_context *)bld_base;
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static const struct lp_derivatives derivs = { 0 };
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params->type = bld_base->base.type;
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params->texel[0] = bld->sampler->emit_fetch_texel(bld->sampler,
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&bld->bld_base.base,
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PIPE_TEXTURE_2D,
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params->texture_index,
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params->coords[0],
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params->derivs ? params->derivs[0] : derivs,
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LP_BLD_TEX_MODIFIER_NONE);
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}
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static void
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emit_load_const(struct lp_build_nir_context *bld_base,
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const nir_load_const_instr *instr,
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LLVMValueRef outval[NIR_MAX_VEC_COMPONENTS])
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{
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struct lp_build_nir_aos_context *bld = lp_nir_aos_context(bld_base);
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struct gallivm_state *gallivm = bld_base->base.gallivm;
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LLVMValueRef elems[4];
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const int nc = instr->def.num_components;
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bool do_swizzle = false;
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if (nc == 4)
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do_swizzle = true;
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for (unsigned i = 0; i < nc; i++) {
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int idx = do_swizzle ? bld->swizzles[i] : i;
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elems[idx] = LLVMConstInt(LLVMInt32TypeInContext(gallivm->context),
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instr->value[i].u32,
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bld_base->base.type.sign ? 1 : 0);
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}
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outval[0] = LLVMConstVector(elems, nc);
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}
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void
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lp_build_nir_aos(struct gallivm_state *gallivm,
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struct nir_shader *shader,
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struct lp_type type,
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const unsigned char swizzles[4],
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LLVMValueRef consts_ptr,
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const LLVMValueRef *inputs,
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LLVMValueRef *outputs,
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const struct lp_build_sampler_aos *sampler,
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const struct tgsi_shader_info *info)
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{
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struct lp_build_nir_aos_context bld;
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memset(&bld, 0, sizeof bld);
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lp_build_context_init(&bld.bld_base.base, gallivm, type);
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lp_build_context_init(&bld.bld_base.uint_bld, gallivm, lp_uint_type(type));
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lp_build_context_init(&bld.bld_base.int_bld, gallivm, lp_int_type(type));
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for (unsigned chan = 0; chan < 4; ++chan) {
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bld.swizzles[chan] = swizzles[chan];
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bld.inv_swizzles[swizzles[chan]] = chan;
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}
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bld.sampler = sampler;
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bld.bld_base.shader = shader;
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bld.inputs = inputs;
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bld.outputs = outputs;
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bld.consts_ptr = consts_ptr;
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bld.bld_base.load_var = emit_load_var;
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bld.bld_base.store_var = emit_store_var;
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bld.bld_base.load_reg = emit_load_reg;
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bld.bld_base.store_reg = emit_store_reg;
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bld.bld_base.load_ubo = emit_load_ubo;
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bld.bld_base.load_const = emit_load_const;
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bld.bld_base.tex = emit_tex;
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bld.bld_base.emit_var_decl = emit_var_decl;
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lp_build_nir_llvm(&bld.bld_base, shader);
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}
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