| // 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 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 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 Storeuintptr(ptr *uintptr, new uintptr) |
| TEXT ·Storeuintptr(SB), NOSPLIT, $0-16 |
| BR ·Store64(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 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 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 |
| // Calculate shift. |
| MOVD R3, R5 |
| AND $3, R5 |
| XOR $3, R5 // big endian - flip direction |
| SLD $3, R5 // MUL $8, R5 |
| SLD R5, R4 |
| // Align ptr down to 4 bytes so we can use 32-bit load/store. |
| AND $-4, R3 |
| MOVWZ 0(R3), R6 |
| again: |
| OR R4, R6, R7 |
| CS R6, R7, 0(R3) // if R6==(R3) then (R3)=R7 else R6=(R3) |
| BNE again |
| RET |
| |
| // func And8(addr *uint8, v uint8) |
| TEXT ·And8(SB), NOSPLIT, $0-9 |
| MOVD ptr+0(FP), R3 |
| MOVBZ val+8(FP), R4 |
| // Calculate shift. |
| MOVD R3, R5 |
| AND $3, R5 |
| XOR $3, R5 // big endian - flip direction |
| SLD $3, R5 // MUL $8, R5 |
| OR $-256, R4 // create 0xffffffffffffffxx |
| RLLG R5, R4 |
| // Align ptr down to 4 bytes so we can use 32-bit load/store. |
| AND $-4, R3 |
| MOVWZ 0(R3), R6 |
| again: |
| AND R4, R6, R7 |
| CS R6, R7, 0(R3) // if R6==(R3) then (R3)=R7 else R6=(R3) |
| BNE again |
| RET |
