blob: acd0a62f4d11215b8df1dc5100543f01023e3f2f [file] [log] [blame]
// Copyright 2014 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"
// uint32 runtime·atomicload(uint32 volatile* addr)
TEXT ·atomicload(SB),NOSPLIT,$-8-12
MOVD ptr+0(FP), R0
LDARW (R0), R0
MOVW R0, ret+8(FP)
RET
// uint64 runtime·atomicload64(uint64 volatile* addr)
TEXT ·atomicload64(SB),NOSPLIT,$-8-16
MOVD ptr+0(FP), R0
LDAR (R0), R0
MOVD R0, ret+8(FP)
RET
// void *runtime·atomicloadp(void *volatile *addr)
TEXT ·atomicloadp(SB),NOSPLIT,$-8-16
MOVD ptr+0(FP), R0
LDAR (R0), R0
MOVD R0, ret+8(FP)
RET
TEXT runtime·atomicstorep1(SB), NOSPLIT, $0-16
B runtime·atomicstore64(SB)
TEXT runtime·atomicstore(SB), NOSPLIT, $0-12
MOVD ptr+0(FP), R0
MOVW val+8(FP), R1
STLRW R1, (R0)
RET
TEXT runtime·atomicstore64(SB), NOSPLIT, $0-16
MOVD ptr+0(FP), R0
MOVD val+8(FP), R1
STLR R1, (R0)
RET
TEXT runtime·xchg(SB), NOSPLIT, $0-20
again:
MOVD ptr+0(FP), R0
MOVW new+8(FP), R1
LDAXRW (R0), R2
STLXRW R1, (R0), R3
CBNZ R3, again
MOVW R2, ret+16(FP)
RET
TEXT runtime·xchg64(SB), NOSPLIT, $0-24
again:
MOVD ptr+0(FP), R0
MOVD new+8(FP), R1
LDAXR (R0), R2
STLXR R1, (R0), R3
CBNZ R3, again
MOVD R2, ret+16(FP)
RET
// bool runtime·cas64(uint64 *ptr, uint64 old, uint64 new)
// Atomically:
// if(*val == *old){
// *val = new;
// return 1;
// } else {
// return 0;
// }
TEXT runtime·cas64(SB), NOSPLIT, $0-25
MOVD ptr+0(FP), R0
MOVD old+8(FP), R1
MOVD new+16(FP), R2
again:
LDAXR (R0), R3
CMP R1, R3
BNE ok
STLXR R2, (R0), R3
CBNZ R3, again
ok:
CSET EQ, R0
MOVB R0, ret+24(FP)
RET
// uint32 xadd(uint32 volatile *ptr, int32 delta)
// Atomically:
// *val += delta;
// return *val;
TEXT runtime·xadd(SB), NOSPLIT, $0-20
again:
MOVD ptr+0(FP), R0
MOVW delta+8(FP), R1
LDAXRW (R0), R2
ADDW R2, R1, R2
STLXRW R2, (R0), R3
CBNZ R3, again
MOVW R2, ret+16(FP)
RET
TEXT runtime·xadd64(SB), NOSPLIT, $0-24
again:
MOVD ptr+0(FP), R0
MOVD delta+8(FP), R1
LDAXR (R0), R2
ADD R2, R1, R2
STLXR R2, (R0), R3
CBNZ R3, again
MOVD R2, ret+16(FP)
RET
TEXT runtime·xchguintptr(SB), NOSPLIT, $0-24
B runtime·xchg64(SB)