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nir: Add NIR_TRUE and NIR_FALSE constants and use them for boolean immediates

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Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
This commit is contained in:
Jason Ekstrand 2014-10-16 16:53:03 -07:00
parent 744b4e9348
commit 4b4f90dbff
2 changed files with 19 additions and 4 deletions
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3
src/glsl/nir/nir.h
View file

@ -40,6 +40,9 @@
extern "C" {
#endif
#define NIR_FALSE 0u
#define NIR_TRUE (~0u)
struct nir_function_overload;
struct nir_function;

20
src/glsl/nir/nir_lower_variables_scalar.c
View file

@ -352,13 +352,24 @@ get_deref_tail(nir_deref *deref)
/* helper for reg_const_load which emits a single instruction */
static void
reg_const_load_single_instr(nir_reg_dest reg, nir_constant *constant,
enum glsl_base_type base_type,
unsigned num_components, unsigned offset,
nir_function_impl *impl, void *mem_ctx)
{
nir_load_const_instr *instr = nir_load_const_instr_create(mem_ctx);
instr->num_components = num_components;
for (unsigned i = 0; i < num_components; i++) {
instr->value.u[i] = constant->value.u[i + offset];
switch (base_type) {
case GLSL_TYPE_FLOAT:
case GLSL_TYPE_INT:
case GLSL_TYPE_UINT:
instr->value.u[i] = constant->value.u[i + offset];
break;
case GLSL_TYPE_BOOL:
instr->value.u[i] = constant->value.u[i + offset] ?
NIR_TRUE : NIR_FALSE;
break;
}
}
instr->dest.reg = reg;
instr->dest.reg.base_offset += offset;
@ -376,20 +387,21 @@ reg_const_load(nir_reg_dest reg, nir_constant *constant,
const struct glsl_type *subtype;
unsigned subtype_size;
switch (glsl_get_base_type(type)) {
enum glsl_base_type base_type = glsl_get_base_type(type);
switch (base_type) {
case GLSL_TYPE_FLOAT:
case GLSL_TYPE_INT:
case GLSL_TYPE_UINT:
case GLSL_TYPE_BOOL:
if (glsl_type_is_matrix(type)) {
for (unsigned i = 0; i < glsl_get_matrix_columns(type); i++) {
reg_const_load_single_instr(reg, constant,
reg_const_load_single_instr(reg, constant, base_type,
glsl_get_vector_elements(type),
i * glsl_get_vector_elements(type),
impl, mem_ctx);
}
} else {
reg_const_load_single_instr(reg, constant,
reg_const_load_single_instr(reg, constant, base_type,
glsl_get_vector_elements(type), 0,
impl, mem_ctx);
}