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// 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∕internal∕atomic·Load(uint32 volatile* addr)
TEXT ·Load(SB),NOSPLIT,$0-12
MOVD ptr+0(FP), R0
LDARW (R0), R0
MOVW R0, ret+8(FP)
RET
// uint8 runtime∕internal∕atomic·Load8(uint8 volatile* addr)
TEXT ·Load8(SB),NOSPLIT,$0-9
MOVD ptr+0(FP), R0
LDARB (R0), R0
MOVB R0, ret+8(FP)
RET
// uint64 runtime∕internal∕atomic·Load64(uint64 volatile* addr)
TEXT ·Load64(SB),NOSPLIT,$0-16
MOVD ptr+0(FP), R0
LDAR (R0), R0
MOVD R0, ret+8(FP)
RET
// void *runtime∕internal∕atomic·Loadp(void *volatile *addr)
TEXT ·Loadp(SB),NOSPLIT,$0-16
MOVD ptr+0(FP), R0
LDAR (R0), R0
MOVD R0, ret+8(FP)
RET
// uint32 runtime∕internal∕atomic·LoadAcq(uint32 volatile* addr)
TEXT ·LoadAcq(SB),NOSPLIT,$0-12
B ·Load(SB)
TEXT runtime∕internal∕atomic·StorepNoWB(SB), NOSPLIT, $0-16
B runtime∕internal∕atomic·Store64(SB)
TEXT runtime∕internal∕atomic·StoreRel(SB), NOSPLIT, $0-12
B runtime∕internal∕atomic·Store(SB)
TEXT runtime∕internal∕atomic·Store(SB), NOSPLIT, $0-12
MOVD ptr+0(FP), R0
MOVW val+8(FP), R1
STLRW R1, (R0)
RET
TEXT runtime∕internal∕atomic·Store8(SB), NOSPLIT, $0-9
MOVD ptr+0(FP), R0
MOVB val+8(FP), R1
STLRB R1, (R0)
RET
TEXT runtime∕internal∕atomic·Store64(SB), NOSPLIT, $0-16
MOVD ptr+0(FP), R0
MOVD val+8(FP), R1
STLR R1, (R0)
RET
TEXT runtime∕internal∕atomic·Xchg(SB), NOSPLIT, $0-20
MOVD ptr+0(FP), R0
MOVW new+8(FP), R1
again:
LDAXRW (R0), R2
STLXRW R1, (R0), R3
CBNZ R3, again
MOVW R2, ret+16(FP)
RET
TEXT runtime∕internal∕atomic·Xchg64(SB), NOSPLIT, $0-24
MOVD ptr+0(FP), R0
MOVD new+8(FP), R1
again:
LDAXR (R0), R2
STLXR R1, (R0), R3
CBNZ R3, again
MOVD R2, ret+16(FP)
RET
// bool runtime∕internal∕atomic·Cas64(uint64 *ptr, uint64 old, uint64 new)
// Atomically:
// if(*val == *old){
// *val = new;
// return 1;
// } else {
// return 0;
// }
TEXT runtime∕internal∕atomic·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∕internal∕atomic·Xadd(SB), NOSPLIT, $0-20
MOVD ptr+0(FP), R0
MOVW delta+8(FP), R1
again:
LDAXRW (R0), R2
ADDW R2, R1, R2
STLXRW R2, (R0), R3
CBNZ R3, again
MOVW R2, ret+16(FP)
RET
TEXT runtime∕internal∕atomic·Xadd64(SB), NOSPLIT, $0-24
MOVD ptr+0(FP), R0
MOVD delta+8(FP), R1
again:
LDAXR (R0), R2
ADD R2, R1, R2
STLXR R2, (R0), R3
CBNZ R3, again
MOVD R2, ret+16(FP)
RET
TEXT runtime∕internal∕atomic·Xchguintptr(SB), NOSPLIT, $0-24
B runtime∕internal∕atomic·Xchg64(SB)
TEXT ·And8(SB), NOSPLIT, $0-9
MOVD ptr+0(FP), R0
MOVB val+8(FP), R1
LDAXRB (R0), R2
AND R1, R2
STLXRB R2, (R0), R3
CBNZ R3, -3(PC)
RET
TEXT ·Or8(SB), NOSPLIT, $0-9
MOVD ptr+0(FP), R0
MOVB val+8(FP), R1
LDAXRB (R0), R2
ORR R1, R2
STLXRB R2, (R0), R3
CBNZ R3, -3(PC)
RET
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