Mesa (master): nvc0/ir: treat FMA like MAD for operand propagation

[Ilia Mirkin]

Module: Mesa
Branch: master
Commit: 09f16de7e624938d46a63b8285fc5b21050962e9
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=09f16de7e624938d46a63b8285fc5b21050962e9

Author: Karol Herbst <karolherbst at gmail.com>
Date:   Sun Mar 19 01:08:56 2017 +0100

nvc0/ir: treat FMA like MAD for operand propagation

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

shader-db changes:
total instructions in shared programs : 3901147 -> 3842505 (-1.50%)
total gprs used in shared programs    : 471258 -> 467359 (-0.83%)
total local used in shared programs   : 27405 -> 27361 (-0.16%)
total bytes used in shared programs   : 35749888 -> 35214176 (-1.50%)

                local        gpr       inst      bytes
    helped          17        1829        4091        4091
      hurt           4          44           3           3

Signed-off-by: Karol Herbst <karolherbst at gmail.com>
Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>
Cc: mesa-stable at lists.freedesktop.org

---

 src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
index abdb328949..1d2e4c3c09 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_target_nvc0.cpp
@@ -105,6 +105,7 @@ static const struct opProperties _initProps[] =
    { OP_MAX,    0x3, 0x3, 0x0, 0x0, 0x2, 0x2 },
    { OP_MIN,    0x3, 0x3, 0x0, 0x0, 0x2, 0x2 },
    { OP_MAD,    0x7, 0x0, 0x0, 0x8, 0x6, 0x2 | 0x8 }, // special c[] constraint
+   { OP_FMA,    0x7, 0x0, 0x0, 0x8, 0x6, 0x2 | 0x8 }, // keep the same as OP_MAD
    { OP_SHLADD, 0x5, 0x0, 0x0, 0x0, 0x4, 0x6 },
    { OP_MADSP,  0x0, 0x0, 0x0, 0x0, 0x6, 0x2 },
    { OP_ABS,    0x0, 0x0, 0x0, 0x0, 0x1, 0x0 },