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atomic_s390x.s
// Copyright 2016 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" // func Store(ptr *uint32, val uint32) TEXT ·Store(SB), NOSPLIT, $0 MOVD ptr+0(FP), R2 MOVWZ val+8(FP), R3 MOVW R3, 0(R2) SYNC RET // func Store8(ptr *uint8, val uint8) TEXT ·Store8(SB), NOSPLIT, $0 MOVD ptr+0(FP), R2 MOVB val+8(FP), R3 MOVB R3, 0(R2) SYNC RET // func Store64(ptr *uint64, val uint64) TEXT ·Store64(SB), NOSPLIT, $0 MOVD ptr+0(FP), R2 MOVD val+8(FP), R3 MOVD R3, 0(R2) SYNC RET // func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) TEXT ·StorepNoWB(SB), NOSPLIT, $0 MOVD ptr+0(FP), R2 MOVD val+8(FP), R3 MOVD R3, 0(R2) SYNC RET // func Cas(ptr *uint32, old, new uint32) bool // Atomically: // if *ptr == old { // *val = new // return 1 // } else { // return 0 // } TEXT ·Cas(SB), NOSPLIT, $0-17 MOVD ptr+0(FP), R3 MOVWZ old+8(FP), R4 MOVWZ new+12(FP), R5 CS R4, R5, 0(R3) // if (R4 == 0(R3)) then 0(R3)= R5 BNE cas_fail MOVB $1, ret+16(FP) RET cas_fail: MOVB $0, ret+16(FP) RET // func Cas64(ptr *uint64, old, new uint64) bool // Atomically: // if *ptr == old { // *ptr = new // return 1 // } else { // return 0 // } TEXT ·Cas64(SB), NOSPLIT, $0-25 MOVD ptr+0(FP), R3 MOVD old+8(FP), R4 MOVD new+16(FP), R5 CSG R4, R5, 0(R3) // if (R4 == 0(R3)) then 0(R3)= R5 BNE cas64_fail MOVB $1, ret+24(FP) RET cas64_fail: MOVB $0, ret+24(FP) RET // func Casint32(ptr *int32, old, new int32) bool TEXT ·Casint32(SB), NOSPLIT, $0-17 BR ·Cas(SB) // func Casint64(ptr *int64, old, new int64) bool TEXT ·Casint64(SB), NOSPLIT, $0-25 BR ·Cas64(SB) // func Casuintptr(ptr *uintptr, old, new uintptr) bool TEXT ·Casuintptr(SB), NOSPLIT, $0-25 BR ·Cas64(SB) // func CasRel(ptr *uint32, old, new uint32) bool TEXT ·CasRel(SB), NOSPLIT, $0-17 BR ·Cas(SB) // func Loaduintptr(ptr *uintptr) uintptr TEXT ·Loaduintptr(SB), NOSPLIT, $0-16 BR ·Load64(SB) // func Loaduint(ptr *uint) uint TEXT ·Loaduint(SB), NOSPLIT, $0-16 BR ·Load64(SB) // func Storeint32(ptr *int32, new int32) TEXT ·Storeint32(SB), NOSPLIT, $0-12 BR ·Store(SB) // func Storeint64(ptr *int64, new int64) TEXT ·Storeint64(SB), NOSPLIT, $0-16 BR ·Store64(SB) // func Storeuintptr(ptr *uintptr, new uintptr) TEXT ·Storeuintptr(SB), NOSPLIT, $0-16 BR ·Store64(SB) // func Loadint32(ptr *int32) int32 TEXT ·Loadint32(SB), NOSPLIT, $0-12 BR ·Load(SB) // func Loadint64(ptr *int64) int64 TEXT ·Loadint64(SB), NOSPLIT, $0-16 BR ·Load64(SB) // func Xadduintptr(ptr *uintptr, delta uintptr) uintptr TEXT ·Xadduintptr(SB), NOSPLIT, $0-24 BR ·Xadd64(SB) // func Xaddint32(ptr *int32, delta int32) int32 TEXT ·Xaddint32(SB), NOSPLIT, $0-20 BR ·Xadd(SB) // func Xaddint64(ptr *int64, delta int64) int64 TEXT ·Xaddint64(SB), NOSPLIT, $0-24 BR ·Xadd64(SB) // func Casp1(ptr *unsafe.Pointer, old, new unsafe.Pointer) bool // Atomically: // if *ptr == old { // *ptr = new // return 1 // } else { // return 0 // } TEXT ·Casp1(SB), NOSPLIT, $0-25 BR ·Cas64(SB) // func Xadd(ptr *uint32, delta int32) uint32 // Atomically: // *ptr += delta // return *ptr TEXT ·Xadd(SB), NOSPLIT, $0-20 MOVD ptr+0(FP), R4 MOVW delta+8(FP), R5 MOVW (R4), R3 repeat: ADD R5, R3, R6 CS R3, R6, (R4) // if R3==(R4) then (R4)=R6 else R3=(R4) BNE repeat MOVW R6, ret+16(FP) RET // func Xadd64(ptr *uint64, delta int64) uint64 TEXT ·Xadd64(SB), NOSPLIT, $0-24 MOVD ptr+0(FP), R4 MOVD delta+8(FP), R5 MOVD (R4), R3 repeat: ADD R5, R3, R6 CSG R3, R6, (R4) // if R3==(R4) then (R4)=R6 else R3=(R4) BNE repeat MOVD R6, ret+16(FP) RET // func Xchg(ptr *uint32, new uint32) uint32 TEXT ·Xchg(SB), NOSPLIT, $0-20 MOVD ptr+0(FP), R4 MOVW new+8(FP), R3 MOVW (R4), R6 repeat: CS R6, R3, (R4) // if R6==(R4) then (R4)=R3 else R6=(R4) BNE repeat MOVW R6, ret+16(FP) RET // func Xchg64(ptr *uint64, new uint64) uint64 TEXT ·Xchg64(SB), NOSPLIT, $0-24 MOVD ptr+0(FP), R4 MOVD new+8(FP), R3 MOVD (R4), R6 repeat: CSG R6, R3, (R4) // if R6==(R4) then (R4)=R3 else R6=(R4) BNE repeat MOVD R6, ret+16(FP) RET // func Xchgint32(ptr *int32, new int32) int32 TEXT ·Xchgint32(SB), NOSPLIT, $0-20 BR ·Xchg(SB) // func Xchgint64(ptr *int64, new int64) int64 TEXT ·Xchgint64(SB), NOSPLIT, $0-24 BR ·Xchg64(SB) // func Xchguintptr(ptr *uintptr, new uintptr) uintptr TEXT ·Xchguintptr(SB), NOSPLIT, $0-24 BR ·Xchg64(SB) // func Or8(addr *uint8, v uint8) TEXT ·Or8(SB), NOSPLIT, $0-9 MOVD ptr+0(FP), R3 MOVBZ val+8(FP), R4 // We don't have atomic operations that work on individual bytes so we // need to align addr down to a word boundary and create a mask // containing v to OR with the entire word atomically. MOVD $(3<<3), R5 RXSBG $59, $60, $3, R3, R5 // R5 = 24 - ((addr % 4) * 8) = ((addr & 3) << 3) ^ (3 << 3) ANDW $~3, R3 // R3 = floor(addr, 4) = addr &^ 3 SLW R5, R4 // R4 = uint32(v) << R5 LAO R4, R6, 0(R3) // R6 = *R3; *R3 |= R4; (atomic) RET // func And8(addr *uint8, v uint8) TEXT ·And8(SB), NOSPLIT, $0-9 MOVD ptr+0(FP), R3 MOVBZ val+8(FP), R4 // We don't have atomic operations that work on individual bytes so we // need to align addr down to a word boundary and create a mask // containing v to AND with the entire word atomically. ORW $~0xff, R4 // R4 = uint32(v) | 0xffffff00 MOVD $(3<<3), R5 RXSBG $59, $60, $3, R3, R5 // R5 = 24 - ((addr % 4) * 8) = ((addr & 3) << 3) ^ (3 << 3) ANDW $~3, R3 // R3 = floor(addr, 4) = addr &^ 3 RLL R5, R4, R4 // R4 = rotl(R4, R5) LAN R4, R6, 0(R3) // R6 = *R3; *R3 &= R4; (atomic) RET // func Or(addr *uint32, v uint32) TEXT ·Or(SB), NOSPLIT, $0-12 MOVD ptr+0(FP), R3 MOVW val+8(FP), R4 LAO R4, R6, 0(R3) // R6 = *R3; *R3 |= R4; (atomic) RET // func And(addr *uint32, v uint32) TEXT ·And(SB), NOSPLIT, $0-12 MOVD ptr+0(FP), R3 MOVW val+8(FP), R4 LAN R4, R6, 0(R3) // R6 = *R3; *R3 &= R4; (atomic) RET
SIMPAN
BATAL