From: Dave Airlie <airlied@redhat.com>
Date: Mon, 3 Apr 2017 03:43:15 +0000 (+0100)
Subject: radv: fix interp at sample code.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=22b116171f88f2dcb1be2a5ea6cd64c0731670e9;p=mesa.git

radv: fix interp at sample code.

Interp at sample needs to use the center, since the sample
positions it retrieves are relative to the center.

This fixes a bunch of CTS tests with multisample_interpolation.

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 dfe2732f78d..6fd2a0c4f62 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -3556,12 +3556,10 @@ static LLVMValueRef visit_interp(struct nir_to_llvm_context *ctx,
 		location = INTERP_CENTROID;
 		break;
 	case nir_intrinsic_interp_var_at_sample:
-		location = INTERP_SAMPLE;
-		src0 = get_src(ctx, instr->src[0]);
-		break;
 	case nir_intrinsic_interp_var_at_offset:
 		location = INTERP_CENTER;
 		src0 = get_src(ctx, instr->src[0]);
+		break;
 	default:
 		break;
 	}