diff options
| author | Samuel Pitoiset <[email protected]> | 2017-12-20 20:56:57 +0100 |
|---|---|---|
| committer | Samuel Pitoiset <[email protected]> | 2018-01-04 18:43:25 +0100 |
| commit | 2670ebb5840c2108c55607520f1cf9eb5868e27a (patch) | |
| tree | 0c079212591d0ebb5fc554a8fbfcd33ed024f139 /src/amd | |
| parent | a4d2782664a215fd90d9c92a3eded3e893501420 (diff) | |
radv/gfx9: reduce the number of input VGPRs for the GS stage
This can still be improved, but let's start with this.
Signed-off-by: Samuel Pitoiset <[email protected]>
Reviewed-by: Bas Nieuwenhuizen <[email protected]>
Diffstat (limited to 'src/amd')
| -rw-r--r-- | src/amd/vulkan/radv_shader.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/amd/vulkan/radv_shader.c b/src/amd/vulkan/radv_shader.c index ab8ba42511e..31879805ae0 100644 --- a/src/amd/vulkan/radv_shader.c +++ b/src/amd/vulkan/radv_shader.c @@ -411,8 +411,21 @@ radv_fill_shader_variant(struct radv_device *device, if (device->physical_device->rad_info.chip_class >= GFX9 && stage == MESA_SHADER_GEOMETRY) { + struct ac_shader_info *info = &variant->info.info; + unsigned gs_vgpr_comp_cnt; + + /* If offsets 4, 5 are used, GS_VGPR_COMP_CNT is ignored and + * VGPR[0:4] are always loaded. + */ + if (info->uses_invocation_id) + gs_vgpr_comp_cnt = 3; /* VGPR3 contains InvocationID. */ + else if (info->uses_prim_id) + gs_vgpr_comp_cnt = 2; /* VGPR2 contains PrimitiveID. */ + else + gs_vgpr_comp_cnt = 1; /* TODO: use input_prim */ + /* TODO: Figure out how many we actually need. */ - variant->rsrc1 |= S_00B228_GS_VGPR_COMP_CNT(3); + variant->rsrc1 |= S_00B228_GS_VGPR_COMP_CNT(gs_vgpr_comp_cnt); variant->rsrc2 |= S_00B22C_ES_VGPR_COMP_CNT(3) | S_00B22C_OC_LDS_EN(1); } else if (device->physical_device->rad_info.chip_class >= GFX9 && |