From d2101e54908dc6899863be0772658dbd7e0bbc71 Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Wed, 23 Oct 2019 09:47:53 -0400 Subject: 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 TryBot-Result: Gobot Gobot Reviewed-by: Cherry Zhang --- src/runtime/internal/atomic/sys_linux_arm.s | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'src/runtime/internal/atomic/sys_linux_arm.s') 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 -- cgit v1.3-5-g9baa