ac/nir: implement load_frag_coord intrinsic

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

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 9d15964..c08f102 100644 (file)
--- 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;