diff options
Diffstat (limited to 'src/runtime/internal/atomic/asm_arm64.s')
| -rw-r--r-- | src/runtime/internal/atomic/asm_arm64.s | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/runtime/internal/atomic/asm_arm64.s b/src/runtime/internal/atomic/asm_arm64.s new file mode 100644 index 0000000..8336a85 --- /dev/null +++ b/src/runtime/internal/atomic/asm_arm64.s @@ -0,0 +1,61 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +#include "textflag.h" + +// bool Cas(uint32 *ptr, uint32 old, uint32 new) +// Atomically: +// if(*val == old){ +// *val = new; +// return 1; +// } else +// return 0; +TEXT runtime∕internal∕atomic·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∕internal∕atomic·Casuintptr(SB), NOSPLIT, $0-25 + B runtime∕internal∕atomic·Cas64(SB) + +TEXT runtime∕internal∕atomic·CasRel(SB), NOSPLIT, $0-17 + B runtime∕internal∕atomic·Cas(SB) + +TEXT runtime∕internal∕atomic·Loaduintptr(SB), NOSPLIT, $0-16 + B runtime∕internal∕atomic·Load64(SB) + +TEXT runtime∕internal∕atomic·Loaduint(SB), NOSPLIT, $0-16 + B runtime∕internal∕atomic·Load64(SB) + +TEXT runtime∕internal∕atomic·Storeuintptr(SB), NOSPLIT, $0-16 + B runtime∕internal∕atomic·Store64(SB) + +TEXT runtime∕internal∕atomic·Xadduintptr(SB), NOSPLIT, $0-24 + B runtime∕internal∕atomic·Xadd64(SB) + +TEXT runtime∕internal∕atomic·Loadint64(SB), NOSPLIT, $0-16 + B runtime∕internal∕atomic·Load64(SB) + +TEXT runtime∕internal∕atomic·Xaddint64(SB), NOSPLIT, $0-24 + B runtime∕internal∕atomic·Xadd64(SB) + +// bool Casp1(void **val, void *old, void *new) +// Atomically: +// if(*val == old){ +// *val = new; +// return 1; +// } else +// return 0; +TEXT runtime∕internal∕atomic·Casp1(SB), NOSPLIT, $0-25 + B runtime∕internal∕atomic·Cas64(SB) |