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radv: reduce number of VGPRs for TESS_EVAL if primitive ID is not used

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We only need to 2.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Samuel Pitoiset 2019-06-26 15:11:00 +02:00
parent cc50c85e13
commit b4477fa4d4
1 changed files with 10 additions and 3 deletions
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13
src/amd/vulkan/radv_shader.c
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@ -471,6 +471,7 @@ radv_get_shader_binary_size(struct ac_shader_binary *binary)
static void
radv_fill_shader_variant(struct radv_device *device,
struct radv_shader_variant *variant,
struct radv_nir_compiler_options *options,
struct ac_shader_binary *binary,
gl_shader_stage stage)
{
@ -495,7 +496,13 @@ radv_fill_shader_variant(struct radv_device *device,
switch (stage) {
case MESA_SHADER_TESS_EVAL:
vgpr_comp_cnt = 3;
if (options->key.tes.as_es) {
assert(device->physical_device->rad_info.chip_class <= GFX8);
vgpr_comp_cnt = info->uses_prim_id ? 3 : 2;
} else {
bool enable_prim_id = options->key.tes.export_prim_id || info->uses_prim_id;
vgpr_comp_cnt = enable_prim_id ? 3 : 2;
}
variant->rsrc2 |= S_00B12C_OC_LDS_EN(1);
break;
case MESA_SHADER_TESS_CTRL:
@ -534,7 +541,7 @@ radv_fill_shader_variant(struct radv_device *device,
if (es_type == MESA_SHADER_VERTEX) {
es_vgpr_comp_cnt = variant->info.vs.vgpr_comp_cnt;
} else if (es_type == MESA_SHADER_TESS_EVAL) {
es_vgpr_comp_cnt = 3;
es_vgpr_comp_cnt = info->uses_prim_id ? 3 : 2;
} else {
unreachable("invalid shader ES type");
}
@ -669,7 +676,7 @@ shader_variant_create(struct radv_device *device,
radv_destroy_llvm_compiler(&ac_llvm, thread_compiler);
radv_fill_shader_variant(device, variant, &binary, stage);
radv_fill_shader_variant(device, variant, options, &binary, stage);
if (code_out) {
*code_out = binary.code;