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| author | Michael Matloob <matloob@golang.org> | 2015-11-02 14:09:24 -0500 |
|---|---|---|
| committer | Michael Matloob <matloob@golang.org> | 2015-11-10 17:38:04 +0000 |
| commit | 67faca7d9c54b367aee5fdeef2d5dd609fcf99d0 (patch) | |
| tree | 5c6e8b4e243286311bbc4743d6a8e86f16dda85f /src/runtime/asm_arm64.s | |
| parent | d33360571f46b46724b908a5603520dce1e8a81c (diff) | |
| download | go-67faca7d9c54b367aee5fdeef2d5dd609fcf99d0.tar.xz | |
runtime: break atomics out into package runtime/internal/atomic
This change breaks out most of the atomics functions in the runtime
into package runtime/internal/atomic. It adds some basic support
in the toolchain for runtime packages, and also modifies linux/arm
atomics to remove the dependency on the runtime's mutex. The mutexes
have been replaced with spinlocks.
all trybots are happy!
In addition to the trybots, I've tested on the darwin/arm64 builder,
on the darwin/arm builder, and on a ppc64le machine.
Change-Id: I6698c8e3cf3834f55ce5824059f44d00dc8e3c2f
Reviewed-on: https://go-review.googlesource.com/14204
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Diffstat (limited to 'src/runtime/asm_arm64.s')
| -rw-r--r-- | src/runtime/asm_arm64.s | 46 |
1 files changed, 1 insertions, 45 deletions
diff --git a/src/runtime/asm_arm64.s b/src/runtime/asm_arm64.s index 80309868f4..33755b35c0 100644 --- a/src/runtime/asm_arm64.s +++ b/src/runtime/asm_arm64.s @@ -453,40 +453,6 @@ CALLFN(·call268435456, 268435464 ) CALLFN(·call536870912, 536870920 ) CALLFN(·call1073741824, 1073741832 ) -// bool cas(uint32 *ptr, uint32 old, uint32 new) -// Atomically: -// if(*val == old){ -// *val = new; -// return 1; -// } else -// return 0; -TEXT runtime·cas(SB), NOSPLIT, $0-17 - MOVD ptr+0(FP), R0 - MOVW old+8(FP), R1 - MOVW new+12(FP), R2 -again: - LDAXRW (R0), R3 - CMPW R1, R3 - BNE ok - STLXRW R2, (R0), R3 - CBNZ R3, again -ok: - CSET EQ, R0 - MOVB R0, ret+16(FP) - RET - -TEXT runtime·casuintptr(SB), NOSPLIT, $0-25 - B runtime·cas64(SB) - -TEXT runtime·atomicloaduintptr(SB), NOSPLIT, $-8-16 - B runtime·atomicload64(SB) - -TEXT runtime·atomicloaduint(SB), NOSPLIT, $-8-16 - B runtime·atomicload64(SB) - -TEXT runtime·atomicstoreuintptr(SB), NOSPLIT, $0-16 - B runtime·atomicstore64(SB) - // AES hashing not implemented for ARM64, issue #10109. TEXT runtime·aeshash(SB),NOSPLIT,$-8-0 MOVW $0, R0 @@ -500,17 +466,7 @@ TEXT runtime·aeshash64(SB),NOSPLIT,$-8-0 TEXT runtime·aeshashstr(SB),NOSPLIT,$-8-0 MOVW $0, R0 MOVW (R0), R1 - -// bool casp(void **val, void *old, void *new) -// Atomically: -// if(*val == old){ -// *val = new; -// return 1; -// } else -// return 0; -TEXT runtime·casp1(SB), NOSPLIT, $0-25 - B runtime·cas64(SB) - + TEXT runtime·procyield(SB),NOSPLIT,$0-0 MOVWU cycles+0(FP), R0 again: |