diff options
Diffstat (limited to 'src/internal/runtime')
| -rw-r--r-- | src/internal/runtime/atomic/atomic_386.go | 3 | ||||
| -rw-r--r-- | src/internal/runtime/atomic/atomic_386.s | 8 | ||||
| -rw-r--r-- | src/internal/runtime/atomic/xchg8_test.go | 2 |
3 files changed, 12 insertions, 1 deletions
diff --git a/src/internal/runtime/atomic/atomic_386.go b/src/internal/runtime/atomic/atomic_386.go index a023baddb7..b6cdea61ab 100644 --- a/src/internal/runtime/atomic/atomic_386.go +++ b/src/internal/runtime/atomic/atomic_386.go @@ -54,6 +54,9 @@ func Xchg64(ptr *uint64, new uint64) uint64 func Xchg(ptr *uint32, new uint32) uint32 //go:noescape +func Xchg8(ptr *uint8, new uint8) uint8 + +//go:noescape func Xchguintptr(ptr *uintptr, new uintptr) uintptr //go:noescape diff --git a/src/internal/runtime/atomic/atomic_386.s b/src/internal/runtime/atomic/atomic_386.s index 08812c37ec..58a56e63c0 100644 --- a/src/internal/runtime/atomic/atomic_386.s +++ b/src/internal/runtime/atomic/atomic_386.s @@ -153,6 +153,14 @@ addloop: MOVL CX, ret_hi+16(FP) RET +// uint8 Xchg8(uint8 *ptr, uint8 new) +TEXT ·Xchg8(SB), NOSPLIT, $0-9 + MOVL ptr+0(FP), BX + MOVB new+4(FP), AX + XCHGB AX, 0(BX) + MOVB AX, ret+8(FP) + RET + TEXT ·Xchg(SB), NOSPLIT, $0-12 MOVL ptr+0(FP), BX MOVL new+4(FP), AX diff --git a/src/internal/runtime/atomic/xchg8_test.go b/src/internal/runtime/atomic/xchg8_test.go index a04fcfc4bd..d9f1d8854e 100644 --- a/src/internal/runtime/atomic/xchg8_test.go +++ b/src/internal/runtime/atomic/xchg8_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build amd64 || arm64 || ppc64 || ppc64le +//go:build 386 || amd64 || arm64 || ppc64 || ppc64le package atomic_test |