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nir/opt_large_constants: only use 16bit float alu when supported

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Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33002>
This commit is contained in:
Georg Lehmann 2026-03-18 15:16:47 +01:00 • committed by Marge Bot
parent 5f37788ae9
commit 57c05f72f9
1 changed files with 8 additions and 6 deletions
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14
src/compiler/nir/nir_opt_large_constants.c
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@ -227,14 +227,15 @@ handle_constant_store(void *mem_ctx, struct var_info *info,
#define NIR_SMALL_CONSTANT_MAX_ABS_VALUE 255
static bool
get_small_constant_component(struct small_constant *info, uint32_t array_len,
get_small_constant_component(const nir_shader_compiler_options *options,
struct small_constant *info, uint32_t array_len,
uint32_t bit_size, nir_const_value *values)
{
int64_t min = INT64_MAX;
bool is_float = true;
uint32_t denom = 1;
if (bit_size < 16) {
if (bit_size < 16 || (bit_size == 16 && !options->support_16bit_alu)) {
is_float = false;
} else {
for (unsigned i = 0; i < array_len; i++) {
@ -348,7 +349,8 @@ get_small_constant_component(struct small_constant *info, uint32_t array_len,
}
static void
get_small_constant(struct var_info *info, glsl_type_size_align_func size_align)
get_small_constant(const nir_shader_compiler_options *options, struct var_info *info,
glsl_type_size_align_func size_align)
{
if (!glsl_type_is_array(info->var->type))
return;
@ -382,8 +384,8 @@ get_small_constant(struct var_info *info, glsl_type_size_align_func size_align)
data = (void *)(((uintptr_t)data) + scalar_stride * c);
read_const_values(values, data, array_len, bit_size, stride);
if (!get_small_constant_component(&info->small_constant[c], array_len,
bit_size, values)) {
if (!get_small_constant_component(options, &info->small_constant[c],
array_len, bit_size, values)) {
info->is_small = false;
break;
}
@ -597,7 +599,7 @@ nir_opt_large_constants(nir_shader *shader,
if (!info->is_constant)
continue;
get_small_constant(info, size_align);
get_small_constant(shader->options, info, size_align);
unsigned var_size, var_align;
size_align(info->var->type, &var_size, &var_align);