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| author | Dmitriy Vyukov <dvyukov@google.com> | 2012-04-05 18:47:43 +0400 |
|---|---|---|
| committer | Dmitriy Vyukov <dvyukov@google.com> | 2012-04-05 18:47:43 +0400 |
| commit | 4667571619fbbb7bf01699388432685dbec8fc9f (patch) | |
| tree | 7047f6e35e45e89a2a4b19f9c52944388d53536d /src/pkg/runtime/runtime.c | |
| parent | a28a10e1a2352736fa8bbf6def02517f42260e34 (diff) | |
| download | go-4667571619fbbb7bf01699388432685dbec8fc9f.tar.xz | |
runtime: add 64-bit atomics
This is factored out part of:
https://golang.org/cl/5279048/
(Parallel GC)
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5985047
Diffstat (limited to 'src/pkg/runtime/runtime.c')
| -rw-r--r-- | src/pkg/runtime/runtime.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/pkg/runtime/runtime.c b/src/pkg/runtime/runtime.c index ebb5544fba..2cb3501dd1 100644 --- a/src/pkg/runtime/runtime.c +++ b/src/pkg/runtime/runtime.c @@ -4,6 +4,7 @@ #include "runtime.h" #include "stack.h" +#include "arch_GOARCH.h" enum { maxround = sizeof(uintptr), @@ -267,6 +268,33 @@ runtime·atoi(byte *p) return n; } +static void +TestAtomic64(void) +{ + uint64 z64, x64; + + z64 = 42; + x64 = 0; + PREFETCH(&z64); + if(runtime·cas64(&z64, &x64, 1)) + runtime·throw("cas64 failed"); + if(x64 != 42) + runtime·throw("cas64 failed"); + if(!runtime·cas64(&z64, &x64, 1)) + runtime·throw("cas64 failed"); + if(x64 != 42 || z64 != 1) + runtime·throw("cas64 failed"); + if(runtime·atomicload64(&z64) != 1) + runtime·throw("load64 failed"); + runtime·atomicstore64(&z64, (1ull<<40)+1); + if(runtime·atomicload64(&z64) != (1ull<<40)+1) + runtime·throw("store64 failed"); + if(runtime·xadd64(&z64, (1ull<<40)+1) != (2ull<<40)+2) + runtime·throw("xadd64 failed"); + if(runtime·atomicload64(&z64) != (2ull<<40)+2) + runtime·throw("xadd64 failed"); +} + void runtime·check(void) { @@ -342,6 +370,8 @@ runtime·check(void) runtime·throw("float32nan2"); if(!(i != i1)) runtime·throw("float32nan3"); + + TestAtomic64(); } void |