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cmd/compile: add intrinsics for runtime/internal/math on MIPS64x

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name              old time/op  new time/op  delta
MulUintptr/small  8.42ns ± 0%  5.93ns ± 0%  -29.66%  (p=0.000 n=9+10)
MulUintptr/large  11.1ns ± 0%   7.4ns ± 0%  -33.17%  (p=0.000 n=10+9)

Change-Id: I6659a886389660461fc2c90bd248243f6e7c29d5
Reviewed-on: https://go-review.googlesource.com/c/go/+/210897
Run-TryBot: Meng Zhuo <mengzhuo1203@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Meng Zhuo 2020-02-29 11:23:29 +08:00 committed by Cherry Zhang
parent 12d02e7d8e
commit ab7ecea0c8
3 changed files with 44 additions and 1 deletions
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2
src/cmd/compile/internal/gc/ssa.go
View File

@ -3269,7 +3269,7 @@ func init() {
}
return s.newValue2(ssa.OpMul64uover, types.NewTuple(types.Types[TUINT], types.Types[TUINT]), args[0], args[1])
},
sys.AMD64, sys.I386)
sys.AMD64, sys.I386, sys.MIPS64)
add("runtime", "KeepAlive",
func(s *state, n *Node, args []*ssa.Value) *ssa.Value {
data := s.newValue1(ssa.OpIData, s.f.Config.Types.BytePtr, args[0])

2
src/cmd/compile/internal/ssa/gen/MIPS64.rules
View File

@ -11,6 +11,8 @@
(Mul(64|32|16|8) x y) -> (Select1 (MULVU x y))
(Mul(32|64)F ...) -> (MUL(F|D) ...)
(Mul64uhilo ...) -> (MULVU ...)
(Select0 (Mul64uover x y)) -> (Select1 <typ.UInt64> (MULVU x y))
(Select1 (Mul64uover x y)) -> (SGTU <typ.Bool> (Select0 <typ.UInt64> (MULVU x y)) (MOVVconst <typ.UInt64> [0]))
(Hmul64 x y) -> (Select0 (MULV x y))
(Hmul64u x y) -> (Select0 (MULVU x y))

41
src/cmd/compile/internal/ssa/rewriteMIPS64.go
View File

@ -6927,6 +6927,24 @@ func rewriteValueMIPS64_OpRsh8x8(v *Value) bool {
}
func rewriteValueMIPS64_OpSelect0(v *Value) bool {
v_0 := v.Args[0]
b := v.Block
typ := &b.Func.Config.Types
// match: (Select0 (Mul64uover x y))
// result: (Select1 <typ.UInt64> (MULVU x y))
for {
if v_0.Op != OpMul64uover {
break
}
y := v_0.Args[1]
x := v_0.Args[0]
v.reset(OpSelect1)
v.Type = typ.UInt64
v0 := b.NewValue0(v.Pos, OpMIPS64MULVU, types.NewTuple(typ.UInt64, typ.UInt64))
v0.AddArg(x)
v0.AddArg(y)
v.AddArg(v0)
return true
}
// match: (Select0 (DIVVU _ (MOVVconst [1])))
// result: (MOVVconst [0])
for {
@ -7010,6 +7028,29 @@ func rewriteValueMIPS64_OpSelect0(v *Value) bool {
}
func rewriteValueMIPS64_OpSelect1(v *Value) bool {
v_0 := v.Args[0]
b := v.Block
typ := &b.Func.Config.Types
// match: (Select1 (Mul64uover x y))
// result: (SGTU <typ.Bool> (Select0 <typ.UInt64> (MULVU x y)) (MOVVconst <typ.UInt64> [0]))
for {
if v_0.Op != OpMul64uover {
break
}
y := v_0.Args[1]
x := v_0.Args[0]
v.reset(OpMIPS64SGTU)
v.Type = typ.Bool
v0 := b.NewValue0(v.Pos, OpSelect0, typ.UInt64)
v1 := b.NewValue0(v.Pos, OpMIPS64MULVU, types.NewTuple(typ.UInt64, typ.UInt64))
v1.AddArg(x)
v1.AddArg(y)
v0.AddArg(v1)
v.AddArg(v0)
v2 := b.NewValue0(v.Pos, OpMIPS64MOVVconst, typ.UInt64)
v2.AuxInt = 0
v.AddArg(v2)
return true
}
// match: (Select1 (MULVU x (MOVVconst [-1])))
// result: (NEGV x)
for {