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| author | Austin Clements <austin@google.com> | 2019-10-23 09:47:53 -0400 |
|---|---|---|
| committer | Austin Clements <austin@google.com> | 2019-10-29 03:18:52 +0000 |
| commit | d2101e54908dc6899863be0772658dbd7e0bbc71 (patch) | |
| tree | d7fe851bcc4e4c7972c9105b0219b757801b1eec /src/runtime/internal/atomic/sys_linux_arm.s | |
| parent | fd1e60f6e3bd42075e335a90ad36719ffed0eb1a (diff) | |
| download | go-d2101e54908dc6899863be0772658dbd7e0bbc71.tar.xz | |
runtime/internal/atomic: add Store8
We already have Load8, And8, and Or8.
For #10958, #24543, but makes sense on its own.
Change-Id: I478529fc643edc57efdeccaae413c99edd19b2eb
Reviewed-on: https://go-review.googlesource.com/c/go/+/203283
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Diffstat (limited to 'src/runtime/internal/atomic/sys_linux_arm.s')
| -rw-r--r-- | src/runtime/internal/atomic/sys_linux_arm.s | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/runtime/internal/atomic/sys_linux_arm.s b/src/runtime/internal/atomic/sys_linux_arm.s index df62f6c8ad..0c1cc3dc86 100644 --- a/src/runtime/internal/atomic/sys_linux_arm.s +++ b/src/runtime/internal/atomic/sys_linux_arm.s @@ -120,3 +120,25 @@ end: MOVB R1, ret+4(FP) RET +TEXT ·Store8(SB),NOSPLIT,$0-5 + MOVW addr+0(FP), R1 + MOVB v+4(FP), R2 + + MOVB runtime·goarm(SB), R8 + CMP $7, R8 + BGE native_barrier + BL memory_barrier<>(SB) + B store +native_barrier: + DMB MB_ISH + +store: + MOVB R2, (R1) + + CMP $7, R8 + BGE native_barrier2 + BL memory_barrier<>(SB) + RET +native_barrier2: + DMB MB_ISH + RET |