ac/nir: implement load_frag_coord intrinsic

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 9d159649c3..c08f1020e3 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -4012,6 +4012,16 @@ static void visit_intrinsic(struct ac_nir_context *ctx,
 	case nir_intrinsic_load_sample_mask_in:
 		result = ctx->abi->sample_coverage;
 		break;
+	case nir_intrinsic_load_frag_coord: {
+		LLVMValueRef values[4] = {
+			ctx->abi->frag_pos[0],
+			ctx->abi->frag_pos[1],
+			ctx->abi->frag_pos[2],
+			ac_build_fdiv(&ctx->ac, ctx->ac.f32_1, ctx->abi->frag_pos[3])
+		};
+		result = ac_build_gather_values(&ctx->ac, values, 4);
+		break;
+	}
 	case nir_intrinsic_load_front_face:
 		result = ctx->abi->front_face;
 		break;