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radeonsi: implement SAMPLEID fragment shader input

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This commit is contained in:
Marek Olšák 2014-05-06 18:12:40 +02:00
parent 501fee2511
commit 5b06fc376d
1 changed files with 17 additions and 1 deletions
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18
src/gallium/drivers/radeonsi/si_shader.c
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@ -529,6 +529,18 @@ static void declare_input_fs(
}
}
static LLVMValueRef get_sample_id(struct radeon_llvm_context *radeon_bld)
{
struct gallivm_state *gallivm = &radeon_bld->gallivm;
LLVMValueRef value = LLVMGetParam(radeon_bld->main_fn,
SI_PARAM_ANCILLARY);
value = LLVMBuildLShr(gallivm->builder, value,
lp_build_const_int32(gallivm, 8), "");
value = LLVMBuildAnd(gallivm->builder, value,
lp_build_const_int32(gallivm, 0xf), "");
return value;
}
static LLVMValueRef load_const(LLVMBuilderRef builder, LLVMValueRef resource,
LLVMValueRef offset, LLVMTypeRef return_type)
{
@ -558,6 +570,10 @@ static void declare_system_value(
si_shader_ctx->param_vertex_id);
break;
case TGSI_SEMANTIC_SAMPLEID:
value = get_sample_id(radeon_bld);
break;
default:
assert(!"unknown system value");
return;
@ -2186,7 +2202,7 @@ static void create_function(struct si_shader_context *si_shader_ctx)
params[SI_PARAM_POS_Z_FLOAT] = f32;
params[SI_PARAM_POS_W_FLOAT] = f32;
params[SI_PARAM_FRONT_FACE] = f32;
params[SI_PARAM_ANCILLARY] = f32;
params[SI_PARAM_ANCILLARY] = i32;
params[SI_PARAM_SAMPLE_COVERAGE] = f32;
params[SI_PARAM_POS_FIXED_PT] = f32;
num_params = SI_PARAM_POS_FIXED_PT+1;