commit 12d7da771729e9d93000129762996bac0c442976
author Ilia Mirkin <imirkin@alum.mit.edu> Fri Apr 07 23:23:25 2017 -0400
committer Emil Velikov <emil.l.velikov@gmail.com> Wed Apr 12 11:32:28 2017 +0100
tree 7b3dc6918017d00ef4e0aedaf43991bc816f2901
parent 4900fa3f82fa98aa30ca06de5eefa0e84e889b12

nvc0/ir: fix overwriting of offset register with interpolateAtOffset

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: mesa-stable@lists.freedesktop.org
(cherry picked from commit 57a744025a2f705d29f60b0eac6e50f8a1ea6203)

src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
index f0c2866..e37374a 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
@@ -2906,8 +2906,8 @@
       // and then convert to s32.
       Value *offs[2];
       for (c = 0; c < 2; c++) {
-         offs[c] = fetchSrc(1, c);
-         mkOp2(OP_MIN, TYPE_F32, offs[c], offs[c], loadImm(NULL, 0.4375f));
+         offs[c] = getScratch();
+         mkOp2(OP_MIN, TYPE_F32, offs[c], fetchSrc(1, c), loadImm(NULL, 0.4375f));
          mkOp2(OP_MAX, TYPE_F32, offs[c], offs[c], loadImm(NULL, -0.5f));
          mkOp2(OP_MUL, TYPE_F32, offs[c], offs[c], loadImm(NULL, 4096.0f));
          mkCvt(OP_CVT, TYPE_S32, offs[c], TYPE_F32, offs[c]);