radv/ac: add implementation of load_sample_pos intrinsic.

This fixes a bunch of crashes in CTS tests looking for this.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 17cefea..741a082 100644 (file)
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -2764,6 +2764,15 @@ static LLVMValueRef load_sample_position(struct nir_to_llvm_context *ctx,
        return build_gather_values(ctx, result, 2);
 }
 
+static LLVMValueRef load_sample_pos(struct nir_to_llvm_context *ctx)
+{
+       LLVMValueRef values[2];
+
+       values[0] = emit_ffract(ctx, ctx->frag_pos[0]);
+       values[1] = emit_ffract(ctx, ctx->frag_pos[1]);
+       return build_gather_values(ctx, values, 2);
+}
+
 static LLVMValueRef visit_interp(struct nir_to_llvm_context *ctx,
                                 nir_intrinsic_instr *instr)
 {
@@ -2888,6 +2897,9 @@ static void visit_intrinsic(struct nir_to_llvm_context *ctx,
        case nir_intrinsic_load_sample_id:
                result = ctx->ancillary;
                break;
+       case nir_intrinsic_load_sample_pos:
+               result = load_sample_pos(ctx);
+               break;
        case nir_intrinsic_load_front_face:
                result = ctx->front_face;
                break;