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nir/builder: Add a flag for setting exact

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Reviewed-by: Francisco Jerez <currojerez@riseup.net>
This commit is contained in:
Jason Ekstrand
2016-03-17 15:54:26 -07:00
parent 4ff89377d9
commit ded3133d47
1 changed files with 9 additions and 0 deletions
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9
src/compiler/nir/nir_builder.h
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@@ -31,6 +31,9 @@ struct exec_list;
typedef struct nir_builder { typedef struct nir_builder {
nir_cursor cursor; nir_cursor cursor;
/* Whether new ALU instructions will be marked "exact" */
bool exact;
nir_shader *shader; nir_shader *shader;
nir_function_impl *impl; nir_function_impl *impl;
} nir_builder; } nir_builder;
@@ -39,6 +42,7 @@ static inline void
nir_builder_init(nir_builder *build, nir_function_impl *impl) nir_builder_init(nir_builder *build, nir_function_impl *impl)
{ {
memset(build, 0, sizeof(*build)); memset(build, 0, sizeof(*build));
build->exact = false;
build->impl = impl; build->impl = impl;
build->shader = impl->function->shader; build->shader = impl->function->shader;
} }
@@ -50,6 +54,7 @@ nir_builder_init_simple_shader(nir_builder *build, void *mem_ctx,
{ {
build->shader = nir_shader_create(mem_ctx, stage, options); build->shader = nir_shader_create(mem_ctx, stage, options);
nir_function *func = nir_function_create(build->shader, "main"); nir_function *func = nir_function_create(build->shader, "main");
build->exact = false;
build->impl = nir_function_impl_create(func); build->impl = nir_function_impl_create(func);
build->cursor = nir_after_cf_list(&build->impl->body); build->cursor = nir_after_cf_list(&build->impl->body);
} }
@@ -143,6 +148,8 @@ nir_build_alu(nir_builder *build, nir_op op, nir_ssa_def *src0,
if (!instr) if (!instr)
return NULL; return NULL;
instr->exact = build->exact;
instr->src[0].src = nir_src_for_ssa(src0); instr->src[0].src = nir_src_for_ssa(src0);
if (src1) if (src1)
instr->src[1].src = nir_src_for_ssa(src1); instr->src[1].src = nir_src_for_ssa(src1);
@@ -260,6 +267,7 @@ nir_fmov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_fmov); nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_fmov);
nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components,
nir_src_bit_size(src.src), NULL); nir_src_bit_size(src.src), NULL);
mov->exact = build->exact;
mov->dest.write_mask = (1 << num_components) - 1; mov->dest.write_mask = (1 << num_components) - 1;
mov->src[0] = src; mov->src[0] = src;
nir_builder_instr_insert(build, &mov->instr); nir_builder_instr_insert(build, &mov->instr);
@@ -273,6 +281,7 @@ nir_imov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_imov); nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_imov);
nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components,
nir_src_bit_size(src.src), NULL); nir_src_bit_size(src.src), NULL);
mov->exact = build->exact;
mov->dest.write_mask = (1 << num_components) - 1; mov->dest.write_mask = (1 << num_components) - 1;
mov->src[0] = src; mov->src[0] = src;
nir_builder_instr_insert(build, &mov->instr); nir_builder_instr_insert(build, &mov->instr);