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| author | Martin Möhrmann <moehrmann@google.com> | 2018-07-28 10:56:48 +0200 |
|---|---|---|
| committer | Martin Möhrmann <moehrmann@google.com> | 2018-08-24 07:29:52 +0000 |
| commit | c15c04d9e85a6a2c46ae57cb830192e0eee276dc (patch) | |
| tree | 83dd5c15182196d11597cfad6823987138297c70 /src/runtime/asm_386.s | |
| parent | d8cf1514cadb512de6972e760ccef76452e3a67c (diff) | |
| download | go-c15c04d9e85a6a2c46ae57cb830192e0eee276dc.tar.gz go-c15c04d9e85a6a2c46ae57cb830192e0eee276dc.zip | |
runtime: use internal/cpu variables in assembler code
Using internal/cpu variables has the benefit of avoiding false sharing
(as those are padded) and allows memory and cache usage for these variables
to be shared by multiple packages.
Change-Id: I2bf68d03091bf52b466cf689230d5d25d5950037
Reviewed-on: https://go-review.googlesource.com/126599
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Diffstat (limited to 'src/runtime/asm_386.s')
| -rw-r--r-- | src/runtime/asm_386.s | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/runtime/asm_386.s b/src/runtime/asm_386.s index a6a81c3f63..725271eec4 100644 --- a/src/runtime/asm_386.s +++ b/src/runtime/asm_386.s @@ -881,7 +881,7 @@ TEXT runtime·stackcheck(SB), NOSPLIT, $0-0 // func cputicks() int64 TEXT runtime·cputicks(SB),NOSPLIT,$0-8 - CMPB runtime·support_sse2(SB), $1 + CMPB internal∕cpu·X86+const_offset_x86_HasSSE2(SB), $1 JNE done CMPB runtime·lfenceBeforeRdtsc(SB), $1 JNE mfence |