diff options
| author | Keith Randall <khr@golang.org> | 2014-12-10 14:20:17 -0800 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2014-12-11 05:23:00 +0000 |
| commit | 7a4a64e8f3dc14717695e53c7560992789f8bc9e (patch) | |
| tree | 2cb7a680b5280f9b698f892f7da3a3a135b095cc /src/liblink | |
| parent | 69f24cfa14ba982e0118e240021f0e91f8efe937 (diff) | |
| download | go-7a4a64e8f3dc14717695e53c7560992789f8bc9e.tar.xz | |
runtime: faster aeshash implementation
The aesenc instruction has high latency. For hashing large objects,
hash several streams in parallel.
benchmark old ns/op new ns/op delta
BenchmarkHash5 7.02 7.45 +6.13%
BenchmarkHash16 6.53 6.94 +6.28%
BenchmarkHash32 8.38 8.26 -1.43%
BenchmarkHash64 12.6 12.0 -4.76%
BenchmarkHash1024 247 62.9 -74.53%
BenchmarkHash65536 17335 2966 -82.89%
BenchmarkHashInt32Speed 14.7 14.9 +1.36%
BenchmarkHashInt64Speed 14.6 14.9 +2.05%
BenchmarkHashBytesSpeed 35.4 28.6 -19.21%
BenchmarkHashStringSpeed 22.0 20.4 -7.27%
BenchmarkHashStringArraySpeed 65.8 56.3 -14.44%
Change-Id: Ia8ba03063acc64a9066b8ab2d79f2c9aaac1770f
Reviewed-on: https://go-review.googlesource.com/1330
Reviewed-by: Russ Cox <rsc@golang.org>
Diffstat (limited to 'src/liblink')
| -rw-r--r-- | src/liblink/asm8.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/liblink/asm8.c b/src/liblink/asm8.c index b6627d5fd7..24510cc6fc 100644 --- a/src/liblink/asm8.c +++ b/src/liblink/asm8.c @@ -611,6 +611,12 @@ static uchar ymshufb[] = 0 }; +static uchar yxshuf[] = +{ + Yxm, Yxr, Zibm_r, 2, + 0 +}; + static Optab optab[] = /* as, ytab, andproto, opcode */ { @@ -1141,6 +1147,10 @@ static Optab optab[] = { AUNPCKLPS, yxm, Pm, {0x14} }, { AXORPD, yxm, Pe, {0x57} }, { AXORPS, yxm, Pm, {0x57} }, + { APSHUFHW, yxshuf, Pf3, {0x70,(00)} }, + { APSHUFL, yxshuf, Pq, {0x70,(00)} }, + { APSHUFLW, yxshuf, Pf2, {0x70,(00)} }, + { AAESENC, yaes, Pq, {0x38,0xdc,(0)} }, { APINSRD, yinsrd, Pq, {0x3a, 0x22, (00)} }, |