From: Karol Herbst <kherbst@redhat.com>
Date: Thu, 17 Jan 2019 22:32:19 +0000 (+0100)
Subject: nv50/ir: disable tryCollapseChainedMULs in ConstantFolding for precise instructions
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=30b5c9eda2fe4c335cc15cb921e4f7774af0879e;p=mesa.git

nv50/ir: disable tryCollapseChainedMULs in ConstantFolding for precise instructions

fixes dEQP-GLES2.functional.shaders.invariance.mediump.loop_3

CC: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
---

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
index 5d3b4aba9cc..0b3220903b9 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
@@ -1045,7 +1045,7 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue &imm0, int s)
       break;
    }
    case OP_MUL:
-      if (i->dType == TYPE_F32)
+      if (i->dType == TYPE_F32 && !i->precise)
          tryCollapseChainedMULs(i, s, imm0);
 
       if (i->subOp == NV50_IR_SUBOP_MUL_HIGH) {