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radv: fix sample id loading

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The sample id is packed into bits 8-12, so adjust
things properly.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2016-11-21 01:12:39 +00:00
parent 3c6151ccaf
commit 220912e214
1 changed files with 18 additions and 1 deletions
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19
src/amd/common/ac_nir_to_llvm.c
View file

@ -379,6 +379,23 @@ static LLVMValueRef to_float(struct nir_to_llvm_context *ctx, LLVMValueRef v)
return v;
}
static LLVMValueRef unpack_param(struct nir_to_llvm_context *ctx,
LLVMValueRef param, unsigned rshift,
unsigned bitwidth)
{
LLVMValueRef value = param;
if (rshift)
value = LLVMBuildLShr(ctx->builder, value,
LLVMConstInt(ctx->i32, rshift, false), "");
if (rshift + bitwidth < 32) {
unsigned mask = (1 << bitwidth) - 1;
value = LLVMBuildAnd(ctx->builder, value,
LLVMConstInt(ctx->i32, mask, false), "");
}
return value;
}
static LLVMValueRef build_gep0(struct nir_to_llvm_context *ctx,
LLVMValueRef base_ptr, LLVMValueRef index)
{
@ -2895,7 +2912,7 @@ static void visit_intrinsic(struct nir_to_llvm_context *ctx,
result = ctx->start_instance;
break;
case nir_intrinsic_load_sample_id:
result = ctx->ancillary;
result = unpack_param(ctx, ctx->ancillary, 8, 4);
break;
case nir_intrinsic_load_sample_pos:
result = load_sample_pos(ctx);