Mesa (master): nvc0/ir: also do ConstantFolding for FMA

Ilia Mirkin imirkin at kemper.freedesktop.org
Sat Apr 1 03:59:22 UTC 2017


Module: Mesa
Branch: master
Commit: f2a4d881fe94512f7600ec33622af58b8ca06fff
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f2a4d881fe94512f7600ec33622af58b8ca06fff

Author: Karol Herbst <karolherbst at gmail.com>
Date:   Tue Mar 21 18:37:47 2017 +0100

nvc0/ir: also do ConstantFolding for FMA

Helps mainly Feral-ported games, due to their use of fma()

shader-db changes:
total instructions in shared programs : 3941587 -> 3940749 (-0.02%)
total gprs used in shared programs    : 481511 -> 481460 (-0.01%)
total local used in shared programs   : 27469 -> 27481 (0.04%)
total bytes used in shared programs   : 36123344 -> 36115776 (-0.02%)

                local        gpr       inst      bytes
    helped           2          48         243         243
      hurt           2           3          32          32

Signed-off-by: Karol Herbst <karolherbst at gmail.com>
Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>

---

 src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
index d358abc5bd..2714b5ff7e 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
@@ -1026,6 +1026,7 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue &imm0, int s)
          i->postFactor = 0;
       }
       break;
+   case OP_FMA:
    case OP_MAD:
       if (imm0.isInteger(0)) {
          i->setSrc(0, i->getSrc(2));




More information about the mesa-commit mailing list