365 lines
12 KiB
C
365 lines
12 KiB
C
/*
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* Copyright © 2014-2015 Broadcom
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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 (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* 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
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef NIR_BUILDER_H
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#define NIR_BUILDER_H
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#include "nir_control_flow.h"
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struct exec_list;
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typedef struct nir_builder {
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nir_cursor cursor;
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nir_shader *shader;
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nir_function_impl *impl;
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} nir_builder;
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static inline void
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nir_builder_init(nir_builder *build, nir_function_impl *impl)
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{
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memset(build, 0, sizeof(*build));
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build->impl = impl;
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build->shader = impl->function->shader;
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}
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static inline void
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nir_builder_init_simple_shader(nir_builder *build, void *mem_ctx,
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gl_shader_stage stage,
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const nir_shader_compiler_options *options)
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{
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build->shader = nir_shader_create(mem_ctx, stage, options);
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nir_function *func = nir_function_create(build->shader, "main");
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build->impl = nir_function_impl_create(func);
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build->cursor = nir_after_cf_list(&build->impl->body);
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}
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static inline void
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nir_builder_instr_insert(nir_builder *build, nir_instr *instr)
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{
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nir_instr_insert(build->cursor, instr);
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/* Move the cursor forward. */
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build->cursor = nir_after_instr(instr);
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}
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static inline void
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nir_builder_cf_insert(nir_builder *build, nir_cf_node *cf)
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{
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nir_cf_node_insert(build->cursor, cf);
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}
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static inline nir_ssa_def *
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nir_build_imm(nir_builder *build, unsigned num_components, nir_const_value value)
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{
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nir_load_const_instr *load_const =
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nir_load_const_instr_create(build->shader, num_components);
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if (!load_const)
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return NULL;
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load_const->value = value;
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nir_builder_instr_insert(build, &load_const->instr);
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return &load_const->def;
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}
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static inline nir_ssa_def *
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nir_imm_float(nir_builder *build, float x)
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{
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nir_const_value v;
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memset(&v, 0, sizeof(v));
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v.f[0] = x;
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return nir_build_imm(build, 1, v);
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}
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static inline nir_ssa_def *
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nir_imm_vec4(nir_builder *build, float x, float y, float z, float w)
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{
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nir_const_value v;
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memset(&v, 0, sizeof(v));
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v.f[0] = x;
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v.f[1] = y;
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v.f[2] = z;
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v.f[3] = w;
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return nir_build_imm(build, 4, v);
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}
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static inline nir_ssa_def *
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nir_imm_int(nir_builder *build, int x)
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{
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nir_const_value v;
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memset(&v, 0, sizeof(v));
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v.i[0] = x;
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return nir_build_imm(build, 1, v);
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}
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static inline nir_ssa_def *
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nir_imm_ivec4(nir_builder *build, int x, int y, int z, int w)
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{
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nir_const_value v;
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memset(&v, 0, sizeof(v));
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v.i[0] = x;
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v.i[1] = y;
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v.i[2] = z;
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v.i[3] = w;
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return nir_build_imm(build, 4, v);
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}
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static inline nir_ssa_def *
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nir_build_alu(nir_builder *build, nir_op op, nir_ssa_def *src0,
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nir_ssa_def *src1, nir_ssa_def *src2, nir_ssa_def *src3)
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{
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const nir_op_info *op_info = &nir_op_infos[op];
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nir_alu_instr *instr = nir_alu_instr_create(build->shader, op);
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if (!instr)
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return NULL;
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instr->src[0].src = nir_src_for_ssa(src0);
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if (src1)
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instr->src[1].src = nir_src_for_ssa(src1);
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if (src2)
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instr->src[2].src = nir_src_for_ssa(src2);
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if (src3)
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instr->src[3].src = nir_src_for_ssa(src3);
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/* Guess the number of components the destination temporary should have
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* based on our input sizes, if it's not fixed for the op.
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*/
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unsigned num_components = op_info->output_size;
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if (num_components == 0) {
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for (unsigned i = 0; i < op_info->num_inputs; i++) {
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if (op_info->input_sizes[i] == 0)
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num_components = MAX2(num_components,
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instr->src[i].src.ssa->num_components);
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}
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}
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assert(num_components != 0);
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/* Make sure we don't swizzle from outside of our source vector (like if a
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* scalar value was passed into a multiply with a vector).
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*/
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for (unsigned i = 0; i < op_info->num_inputs; i++) {
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for (unsigned j = instr->src[i].src.ssa->num_components; j < 4; j++) {
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instr->src[i].swizzle[j] = instr->src[i].src.ssa->num_components - 1;
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}
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}
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nir_ssa_dest_init(&instr->instr, &instr->dest.dest, num_components, NULL);
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instr->dest.write_mask = (1 << num_components) - 1;
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nir_builder_instr_insert(build, &instr->instr);
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return &instr->dest.dest.ssa;
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}
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#define ALU1(op) \
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static inline nir_ssa_def * \
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nir_##op(nir_builder *build, nir_ssa_def *src0) \
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{ \
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return nir_build_alu(build, nir_op_##op, src0, NULL, NULL, NULL); \
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}
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#define ALU2(op) \
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static inline nir_ssa_def * \
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nir_##op(nir_builder *build, nir_ssa_def *src0, nir_ssa_def *src1) \
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{ \
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return nir_build_alu(build, nir_op_##op, src0, src1, NULL, NULL); \
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}
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#define ALU3(op) \
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static inline nir_ssa_def * \
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nir_##op(nir_builder *build, nir_ssa_def *src0, \
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nir_ssa_def *src1, nir_ssa_def *src2) \
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{ \
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return nir_build_alu(build, nir_op_##op, src0, src1, src2, NULL); \
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}
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#define ALU4(op) \
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static inline nir_ssa_def * \
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nir_##op(nir_builder *build, nir_ssa_def *src0, \
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nir_ssa_def *src1, nir_ssa_def *src2, nir_ssa_def *src3) \
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{ \
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return nir_build_alu(build, nir_op_##op, src0, src1, src2, src3); \
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}
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#include "nir_builder_opcodes.h"
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static inline nir_ssa_def *
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nir_vec(nir_builder *build, nir_ssa_def **comp, unsigned num_components)
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{
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switch (num_components) {
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case 4:
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return nir_vec4(build, comp[0], comp[1], comp[2], comp[3]);
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case 3:
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return nir_vec3(build, comp[0], comp[1], comp[2]);
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case 2:
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return nir_vec2(build, comp[0], comp[1]);
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case 1:
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return comp[0];
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default:
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unreachable("bad component count");
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return NULL;
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}
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}
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/**
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* Similar to nir_fmov, but takes a nir_alu_src instead of a nir_ssa_def.
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*/
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static inline nir_ssa_def *
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nir_fmov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
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{
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nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_fmov);
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nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
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mov->dest.write_mask = (1 << num_components) - 1;
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mov->src[0] = src;
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nir_builder_instr_insert(build, &mov->instr);
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return &mov->dest.dest.ssa;
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}
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static inline nir_ssa_def *
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nir_imov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
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{
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nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_imov);
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nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
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mov->dest.write_mask = (1 << num_components) - 1;
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mov->src[0] = src;
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nir_builder_instr_insert(build, &mov->instr);
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return &mov->dest.dest.ssa;
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}
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/**
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* Construct an fmov or imov that reswizzles the source's components.
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*/
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static inline nir_ssa_def *
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nir_swizzle(nir_builder *build, nir_ssa_def *src, unsigned swiz[4],
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unsigned num_components, bool use_fmov)
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{
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nir_alu_src alu_src = { NIR_SRC_INIT };
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alu_src.src = nir_src_for_ssa(src);
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for (unsigned i = 0; i < num_components; i++)
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alu_src.swizzle[i] = swiz[i];
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return use_fmov ? nir_fmov_alu(build, alu_src, num_components) :
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nir_imov_alu(build, alu_src, num_components);
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}
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static inline nir_ssa_def *
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nir_channel(nir_builder *b, nir_ssa_def *def, unsigned c)
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{
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unsigned swizzle[4] = {c, c, c, c};
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return nir_swizzle(b, def, swizzle, 1, false);
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}
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/**
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* Turns a nir_src into a nir_ssa_def * so it can be passed to
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* nir_build_alu()-based builder calls.
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*
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* See nir_ssa_for_alu_src() for alu instructions.
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*/
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static inline nir_ssa_def *
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nir_ssa_for_src(nir_builder *build, nir_src src, int num_components)
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{
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if (src.is_ssa && src.ssa->num_components == num_components)
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return src.ssa;
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nir_alu_src alu = { NIR_SRC_INIT };
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alu.src = src;
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for (int j = 0; j < 4; j++)
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alu.swizzle[j] = j;
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return nir_imov_alu(build, alu, num_components);
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}
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/**
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* Similar to nir_ssa_for_src(), but for alu src's, respecting the
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* nir_alu_src's swizzle.
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*/
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static inline nir_ssa_def *
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nir_ssa_for_alu_src(nir_builder *build, nir_alu_instr *instr, unsigned srcn)
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{
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static uint8_t trivial_swizzle[4] = { 0, 1, 2, 3 };
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nir_alu_src *src = &instr->src[srcn];
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unsigned num_components = nir_ssa_alu_instr_src_components(instr, srcn);
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if (src->src.is_ssa && (src->src.ssa->num_components == num_components) &&
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!src->abs && !src->negate &&
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(memcmp(src->swizzle, trivial_swizzle, num_components) == 0))
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return src->src.ssa;
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return nir_imov_alu(build, *src, num_components);
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}
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static inline nir_ssa_def *
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nir_load_var(nir_builder *build, nir_variable *var)
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{
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const unsigned num_components = glsl_get_vector_elements(var->type);
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nir_intrinsic_instr *load =
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nir_intrinsic_instr_create(build->shader, nir_intrinsic_load_var);
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load->num_components = num_components;
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load->variables[0] = nir_deref_var_create(load, var);
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nir_ssa_dest_init(&load->instr, &load->dest, num_components, NULL);
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nir_builder_instr_insert(build, &load->instr);
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return &load->dest.ssa;
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}
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static inline void
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nir_store_var(nir_builder *build, nir_variable *var, nir_ssa_def *value,
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unsigned writemask)
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{
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const unsigned num_components = glsl_get_vector_elements(var->type);
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nir_intrinsic_instr *store =
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nir_intrinsic_instr_create(build->shader, nir_intrinsic_store_var);
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store->num_components = num_components;
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store->const_index[0] = writemask;
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store->variables[0] = nir_deref_var_create(store, var);
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store->src[0] = nir_src_for_ssa(value);
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nir_builder_instr_insert(build, &store->instr);
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}
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static inline nir_ssa_def *
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nir_load_system_value(nir_builder *build, nir_intrinsic_op op, int index)
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{
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nir_intrinsic_instr *load = nir_intrinsic_instr_create(build->shader, op);
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load->num_components = nir_intrinsic_infos[op].dest_components;
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load->const_index[0] = index;
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nir_ssa_dest_init(&load->instr, &load->dest,
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nir_intrinsic_infos[op].dest_components, NULL);
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nir_builder_instr_insert(build, &load->instr);
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return &load->dest.ssa;
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}
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#endif /* NIR_BUILDER_H */
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