From 97ff618b0625e31e9690ce406981fa5ef3cfbfc3 Mon Sep 17 00:00:00 2001
From: Tom Stellard <thomas.stellard@amd.com>
Date: Mon, 21 Jan 2013 15:40:48 +0000
Subject: [PATCH] R600/SI: Use unnormalized coordinates for sampling with the
 RECT target.
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Patch by: Michel Dänzer

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173053 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/R600/R600Instructions.td | 7 +++++++
 lib/Target/R600/SIInstructions.td   | 6 ++++++
 2 files changed, 13 insertions(+)

diff --git a/lib/Target/R600/R600Instructions.td b/lib/Target/R600/R600Instructions.td
index 64bab18fa6c..b15ea762bfd 100644
--- a/lib/Target/R600/R600Instructions.td
+++ b/lib/Target/R600/R600Instructions.td
@@ -342,6 +342,13 @@ def TEX_SHADOW : PatLeaf<
   }]
 >;
 
+def TEX_RECT : PatLeaf<
+  (imm),
+  [{uint32_t TType = (uint32_t)N->getZExtValue();
+    return TType == 5;
+  }]
+>;
+
 class EG_CF_RAT <bits <8> cf_inst, bits <6> rat_inst, bits<4> rat_id, dag outs,
                  dag ins, string asm, list<dag> pattern> :
     InstR600ISA <outs, ins, asm, pattern> {
diff --git a/lib/Target/R600/SIInstructions.td b/lib/Target/R600/SIInstructions.td
index 0f9d572c4ad..4164c558378 100644
--- a/lib/Target/R600/SIInstructions.td
+++ b/lib/Target/R600/SIInstructions.td
@@ -1191,6 +1191,12 @@ def : Pat <
                 SReg_256:$rsrc, SReg_128:$sampler)
 >;
 
+def : Pat <
+  (int_SI_sample imm:$writemask, VReg_128:$coord, SReg_256:$rsrc, SReg_128:$sampler, TEX_RECT),
+  (IMAGE_SAMPLE imm:$writemask, 1, 0, 0, 0, 0, 0, 0, VReg_128:$coord,
+                SReg_256:$rsrc, SReg_128:$sampler)
+>;
+
 /* int_SI_sample_lod */
 def : Pat <
   (int_SI_sample_lod imm:$writemask, VReg_128:$coord, SReg_256:$rsrc, SReg_128:$sampler, imm),