diff options
| author | Karol Herbst <[email protected]> | 2016-01-27 18:25:05 +0100 |
|---|---|---|
| committer | Ilia Mirkin <[email protected]> | 2016-01-28 15:34:22 -0500 |
| commit | 978ae28ca279354852a586b202e705db3d596041 (patch) | |
| tree | aa35f2ce62383b7038411f33b0b7570f906b0e28 | |
| parent | 089f60543930fcdab3848d59e6182abcaaeb1b86 (diff) | |
nv50/ir: optimize shl(shr(a, c), c) to and(a, ~((1 << c) - 1))
Following shader-db results on GK110:
total instructions in shared programs : 6141510 -> 6131491 (-0.16%)
total gprs used in shared programs : 910187 -> 910157 (-0.00%)
total local used in shared programs : 15328 -> 15328 (0.00%)
local gpr inst bytes
helped 0 18 821 821
hurt 0 0 0 0
Signed-off-by: Karol Herbst <[email protected]>
Reviewed-by: Ilia Mirkin <[email protected]>
| -rw-r--r-- | src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp index 95e9fdfc57d..b2c9fdfc7a4 100644 --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp @@ -1202,6 +1202,14 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue &imm0, int s) i->setSrc(1, bld.loadImm(NULL, imm0.reg.data.u32 + imm1.reg.data.u32)); } break; + case OP_SHR: + if (si->src(1).getImmediate(imm1) && imm0.reg.data.u32 == imm1.reg.data.u32) { + bld.setPosition(i, false); + i->op = OP_AND; + i->setSrc(0, si->getSrc(0)); + i->setSrc(1, bld.loadImm(NULL, ~((1 << imm0.reg.data.u32) - 1))); + } + break; case OP_MUL: int muls; if (isFloatType(si->dType)) |