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| author | Keith Randall <khr@google.com> | 2018-10-23 14:05:38 -0700 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2018-10-25 19:47:00 +0000 |
| commit | 899f3a2892b0a6e06a2e5f54c0a196d15944b99e (patch) | |
| tree | b7111d4b4af1564c5ec64267569a4a7584ef4137 /test/codegen/mathbits.go | |
| parent | f6b554fec75ff1a36c6204755db8c1f638255b64 (diff) | |
| download | go-899f3a2892b0a6e06a2e5f54c0a196d15944b99e.tar.xz | |
cmd/compile: intrinsify math/bits.Add on amd64
name old time/op new time/op delta
Add-8 1.11ns ± 0% 1.18ns ± 0% +6.31% (p=0.029 n=4+4)
Add32-8 1.02ns ± 0% 1.02ns ± 1% ~ (p=0.333 n=4+5)
Add64-8 1.11ns ± 1% 1.17ns ± 0% +5.79% (p=0.008 n=5+5)
Add64multiple-8 4.35ns ± 1% 0.86ns ± 0% -80.22% (p=0.000 n=5+4)
The individual ops are a bit slower (but still very fast).
Using the ops in carry chains is very fast.
Update #28273
Change-Id: Id975f76df2b930abf0e412911d327b6c5b1befe5
Reviewed-on: https://go-review.googlesource.com/c/144257
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Diffstat (limited to 'test/codegen/mathbits.go')
| -rw-r--r-- | test/codegen/mathbits.go | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/test/codegen/mathbits.go b/test/codegen/mathbits.go index c21de19707..9a89c5f6b0 100644 --- a/test/codegen/mathbits.go +++ b/test/codegen/mathbits.go @@ -327,6 +327,66 @@ func IterateBits8(n uint8) int { } // --------------- // +// bits.Add* // +// --------------- // + +func Add(x, y, ci uint) (r, co uint) { + // amd64:"NEGL","ADCQ","SBBQ","NEGQ" + return bits.Add(x, y, ci) +} + +func AddC(x, ci uint) (r, co uint) { + // amd64:"NEGL","ADCQ","SBBQ","NEGQ" + return bits.Add(x, 7, ci) +} + +func AddZ(x, y uint) (r, co uint) { + // amd64:"ADDQ","SBBQ","NEGQ",-"NEGL",-"ADCQ" + return bits.Add(x, y, 0) +} + +func AddR(x, y, ci uint) uint { + // amd64:"NEGL","ADCQ",-"SBBQ",-"NEGQ" + r, _ := bits.Add(x, y, ci) + return r +} +func AddM(p, q, r *[3]uint) { + var c uint + r[0], c = bits.Add(p[0], q[0], c) + // amd64:"ADCQ",-"NEGL",-"SBBQ",-"NEGQ" + r[1], c = bits.Add(p[1], q[1], c) + r[2], c = bits.Add(p[2], q[2], c) +} + +func Add64(x, y, ci uint64) (r, co uint64) { + // amd64:"NEGL","ADCQ","SBBQ","NEGQ" + return bits.Add64(x, y, ci) +} + +func Add64C(x, ci uint64) (r, co uint64) { + // amd64:"NEGL","ADCQ","SBBQ","NEGQ" + return bits.Add64(x, 7, ci) +} + +func Add64Z(x, y uint64) (r, co uint64) { + // amd64:"ADDQ","SBBQ","NEGQ",-"NEGL",-"ADCQ" + return bits.Add64(x, y, 0) +} + +func Add64R(x, y, ci uint64) uint64 { + // amd64:"NEGL","ADCQ",-"SBBQ",-"NEGQ" + r, _ := bits.Add64(x, y, ci) + return r +} +func Add64M(p, q, r *[3]uint64) { + var c uint64 + r[0], c = bits.Add64(p[0], q[0], c) + // amd64:"ADCQ",-"NEGL",-"SBBQ",-"NEGQ" + r[1], c = bits.Add64(p[1], q[1], c) + r[2], c = bits.Add64(p[2], q[2], c) +} + +// --------------- // // bits.Mul* // // --------------- // |