Mesa (master): nv50/ir/opt: fix constant folding with saturate modifier

[Ilia Mirkin]

Module: Mesa
Branch: master
Commit: 3b0867f35b5b294eb0d40524a6bc4c8de888a96f
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3b0867f35b5b294eb0d40524a6bc4c8de888a96f

Author: Christoph Bumiller <e0425955 at student.tuwien.ac.at>
Date:   Tue Jun 11 22:57:31 2013 +0200

nv50/ir/opt: fix constant folding with saturate modifier

Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>
Cc: "10.2" <mesa-stable at lists.freedesktop.org>

---

 src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
index e6f8f69..1a2c2e6 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
@@ -561,7 +561,7 @@ ConstantFolding::expr(Instruction *i,
       if (i->src(0).getImmediate(src0))
          expr(i, src0, *i->getSrc(1)->asImm());
    } else {
-      i->op = OP_MOV;
+      i->op = i->saturate ? OP_SAT : OP_MOV; /* SAT handled by unary() */
    }
 }
 
@@ -612,6 +612,7 @@ ConstantFolding::unary(Instruction *i, const ImmediateValue &imm)
    switch (i->op) {
    case OP_NEG: res.data.f32 = -imm.reg.data.f32; break;
    case OP_ABS: res.data.f32 = fabsf(imm.reg.data.f32); break;
+   case OP_SAT: res.data.f32 = CLAMP(imm.reg.data.f32, 0.0f, 1.0f); break;
    case OP_RCP: res.data.f32 = 1.0f / imm.reg.data.f32; break;
    case OP_RSQ: res.data.f32 = 1.0f / sqrtf(imm.reg.data.f32); break;
    case OP_LG2: res.data.f32 = log2f(imm.reg.data.f32); break;
@@ -922,6 +923,7 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue &imm0, int s)
 
    case OP_ABS:
    case OP_NEG:
+   case OP_SAT:
    case OP_LG2:
    case OP_RCP:
    case OP_SQRT: