diff options
| author | Marek Olšák <[email protected]> | 2016-01-20 01:45:21 +0100 |
|---|---|---|
| committer | Marek Olšák <[email protected]> | 2016-01-22 15:02:40 +0100 |
| commit | 6f428328d34bed16edb8709e4a117eb710d7893d (patch) | |
| tree | 9d2fe5ecc61ea166ea30df7e760b30a76b015881 /src/gallium/drivers | |
| parent | 2b66bc87d4dc50e7b97d3f4521767927fbf355a4 (diff) | |
radeonsi: implement SAMPLEPOS system value without a constant buffer load
We always get per-sample input position.
Reviewed-by: Edward O'Callaghan <[email protected]>
Reviewed-by: Nicolai Hähnle <[email protected]>
Diffstat (limited to 'src/gallium/drivers')
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_shader.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index 0c5fd326a5d..1bd617fa147 100644 --- a/src/gallium/drivers/radeonsi/si_shader.c +++ b/src/gallium/drivers/radeonsi/si_shader.c @@ -1119,9 +1119,20 @@ static void declare_system_value( value = get_sample_id(radeon_bld); break; - case TGSI_SEMANTIC_SAMPLEPOS: - value = load_sample_position(radeon_bld, get_sample_id(radeon_bld)); + case TGSI_SEMANTIC_SAMPLEPOS: { + LLVMValueRef pos[4] = { + LLVMGetParam(radeon_bld->main_fn, SI_PARAM_POS_X_FLOAT), + LLVMGetParam(radeon_bld->main_fn, SI_PARAM_POS_Y_FLOAT), + lp_build_const_float(gallivm, 0), + lp_build_const_float(gallivm, 0) + }; + pos[0] = lp_build_emit_llvm_unary(&radeon_bld->soa.bld_base, + TGSI_OPCODE_FRC, pos[0]); + pos[1] = lp_build_emit_llvm_unary(&radeon_bld->soa.bld_base, + TGSI_OPCODE_FRC, pos[1]); + value = lp_build_gather_values(gallivm, pos, 4); break; + } case TGSI_SEMANTIC_SAMPLEMASK: /* Smoothing isn't MSAA in GL, but it's MSAA in hardware. |