diff options
Diffstat (limited to 'src/gallium/drivers/radeonsi/si_shader.c')
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_shader.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index d021caaa6c4..6818106ece7 100644 --- a/src/gallium/drivers/radeonsi/si_shader.c +++ b/src/gallium/drivers/radeonsi/si_shader.c @@ -557,6 +557,8 @@ static void declare_system_value( { struct si_shader_context *si_shader_ctx = si_shader_context(&radeon_bld->soa.bld_base); + struct lp_build_context *uint_bld = &radeon_bld->soa.bld_base.uint_bld; + struct gallivm_state *gallivm = &radeon_bld->gallivm; LLVMValueRef value = 0; switch (decl->Semantic.Name) { @@ -574,6 +576,27 @@ static void declare_system_value( value = get_sample_id(radeon_bld); break; + case TGSI_SEMANTIC_SAMPLEPOS: + { + LLVMBuilderRef builder = gallivm->builder; + LLVMValueRef desc = LLVMGetParam(si_shader_ctx->radeon_bld.main_fn, SI_PARAM_CONST); + LLVMValueRef buf_index = lp_build_const_int32(gallivm, NUM_PIPE_CONST_BUFFERS); + LLVMValueRef resource = build_indexed_load(si_shader_ctx, desc, buf_index); + + /* offset = sample_id * 8 (8 = 2 floats containing samplepos.xy) */ + LLVMValueRef offset0 = lp_build_mul_imm(uint_bld, get_sample_id(radeon_bld), 8); + LLVMValueRef offset1 = LLVMBuildAdd(builder, offset0, lp_build_const_int32(gallivm, 4), ""); + + LLVMValueRef pos[4] = { + load_const(builder, resource, offset0, radeon_bld->soa.bld_base.base.elem_type), + load_const(builder, resource, offset1, radeon_bld->soa.bld_base.base.elem_type), + lp_build_const_float(gallivm, 0), + lp_build_const_float(gallivm, 0) + }; + value = lp_build_gather_values(gallivm, pos, 4); + break; + } + default: assert(!"unknown system value"); return; |