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atomic_mips64x.s
// 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. //go:build mips64 || mips64le #include "textflag.h" #define SYNC WORD $0xf // bool cas(uint32 *ptr, uint32 old, uint32 new) // Atomically: // if(*val == old){ // *val = new; // return 1; // } else // return 0; TEXT ·Cas(SB), NOSPLIT, $0-17 MOVV ptr+0(FP), R1 MOVW old+8(FP), R2 MOVW new+12(FP), R5 SYNC cas_again: MOVV R5, R3 LL (R1), R4 BNE R2, R4, cas_fail SC R3, (R1) BEQ R3, cas_again MOVV $1, R1 MOVB R1, ret+16(FP) SYNC RET cas_fail: MOVV $0, R1 JMP -4(PC) // bool cas64(uint64 *ptr, uint64 old, uint64 new) // Atomically: // if(*val == old){ // *val = new; // return 1; // } else { // return 0; // } TEXT ·Cas64(SB), NOSPLIT, $0-25 MOVV ptr+0(FP), R1 MOVV old+8(FP), R2 MOVV new+16(FP), R5 SYNC cas64_again: MOVV R5, R3 LLV (R1), R4 BNE R2, R4, cas64_fail SCV R3, (R1) BEQ R3, cas64_again MOVV $1, R1 MOVB R1, ret+24(FP) SYNC RET cas64_fail: MOVV $0, R1 JMP -4(PC) TEXT ·Casint32(SB), NOSPLIT, $0-17 JMP ·Cas(SB) TEXT ·Casint64(SB), NOSPLIT, $0-25 JMP ·Cas64(SB) TEXT ·Casuintptr(SB), NOSPLIT, $0-25 JMP ·Cas64(SB) TEXT ·CasRel(SB), NOSPLIT, $0-17 JMP ·Cas(SB) TEXT ·Loaduintptr(SB), NOSPLIT|NOFRAME, $0-16 JMP ·Load64(SB) TEXT ·Loaduint(SB), NOSPLIT|NOFRAME, $0-16 JMP ·Load64(SB) TEXT ·Storeint32(SB), NOSPLIT, $0-12 JMP ·Store(SB) TEXT ·Storeint64(SB), NOSPLIT, $0-16 JMP ·Store64(SB) TEXT ·Storeuintptr(SB), NOSPLIT, $0-16 JMP ·Store64(SB) TEXT ·Xadduintptr(SB), NOSPLIT, $0-24 JMP ·Xadd64(SB) TEXT ·Loadint32(SB), NOSPLIT, $0-12 JMP ·Load(SB) TEXT ·Loadint64(SB), NOSPLIT, $0-16 JMP ·Load64(SB) TEXT ·Xaddint32(SB), NOSPLIT, $0-20 JMP ·Xadd(SB) TEXT ·Xaddint64(SB), NOSPLIT, $0-24 JMP ·Xadd64(SB) // bool casp(void **val, void *old, void *new) // Atomically: // if(*val == old){ // *val = new; // return 1; // } else // return 0; TEXT ·Casp1(SB), NOSPLIT, $0-25 JMP ·Cas64(SB) // uint32 xadd(uint32 volatile *ptr, int32 delta) // Atomically: // *val += delta; // return *val; TEXT ·Xadd(SB), NOSPLIT, $0-20 MOVV ptr+0(FP), R2 MOVW delta+8(FP), R3 SYNC LL (R2), R1 ADDU R1, R3, R4 MOVV R4, R1 SC R4, (R2) BEQ R4, -4(PC) MOVW R1, ret+16(FP) SYNC RET // uint64 Xadd64(uint64 volatile *ptr, int64 delta) // Atomically: // *val += delta; // return *val; TEXT ·Xadd64(SB), NOSPLIT, $0-24 MOVV ptr+0(FP), R2 MOVV delta+8(FP), R3 SYNC LLV (R2), R1 ADDVU R1, R3, R4 MOVV R4, R1 SCV R4, (R2) BEQ R4, -4(PC) MOVV R1, ret+16(FP) SYNC RET // uint32 Xchg(ptr *uint32, new uint32) // Atomically: // old := *ptr; // *ptr = new; // return old; TEXT ·Xchg(SB), NOSPLIT, $0-20 MOVV ptr+0(FP), R2 MOVW new+8(FP), R5 SYNC MOVV R5, R3 LL (R2), R1 SC R3, (R2) BEQ R3, -3(PC) MOVW R1, ret+16(FP) SYNC RET // uint64 Xchg64(ptr *uint64, new uint64) // Atomically: // old := *ptr; // *ptr = new; // return old; TEXT ·Xchg64(SB), NOSPLIT, $0-24 MOVV ptr+0(FP), R2 MOVV new+8(FP), R5 SYNC MOVV R5, R3 LLV (R2), R1 SCV R3, (R2) BEQ R3, -3(PC) MOVV R1, ret+16(FP) SYNC RET TEXT ·Xchgint32(SB), NOSPLIT, $0-20 JMP ·Xchg(SB) TEXT ·Xchgint64(SB), NOSPLIT, $0-24 JMP ·Xchg64(SB) TEXT ·Xchguintptr(SB), NOSPLIT, $0-24 JMP ·Xchg64(SB) TEXT ·StorepNoWB(SB), NOSPLIT, $0-16 JMP ·Store64(SB) TEXT ·StoreRel(SB), NOSPLIT, $0-12 JMP ·Store(SB) TEXT ·StoreRel64(SB), NOSPLIT, $0-16 JMP ·Store64(SB) TEXT ·StoreReluintptr(SB), NOSPLIT, $0-16 JMP ·Store64(SB) TEXT ·Store(SB), NOSPLIT, $0-12 MOVV ptr+0(FP), R1 MOVW val+8(FP), R2 SYNC MOVW R2, 0(R1) SYNC RET TEXT ·Store8(SB), NOSPLIT, $0-9 MOVV ptr+0(FP), R1 MOVB val+8(FP), R2 SYNC MOVB R2, 0(R1) SYNC RET TEXT ·Store64(SB), NOSPLIT, $0-16 MOVV ptr+0(FP), R1 MOVV val+8(FP), R2 SYNC MOVV R2, 0(R1) SYNC RET // void Or8(byte volatile*, byte); TEXT ·Or8(SB), NOSPLIT, $0-9 MOVV ptr+0(FP), R1 MOVBU val+8(FP), R2 // Align ptr down to 4 bytes so we can use 32-bit load/store. MOVV $~3, R3 AND R1, R3 // Compute val shift. #ifdef GOARCH_mips64 // Big endian. ptr = ptr ^ 3 XOR $3, R1 #endif // R4 = ((ptr & 3) * 8) AND $3, R1, R4 SLLV $3, R4 // Shift val for aligned ptr. R2 = val << R4 SLLV R4, R2 SYNC LL (R3), R4 OR R2, R4 SC R4, (R3) BEQ R4, -4(PC) SYNC RET // void And8(byte volatile*, byte); TEXT ·And8(SB), NOSPLIT, $0-9 MOVV ptr+0(FP), R1 MOVBU val+8(FP), R2 // Align ptr down to 4 bytes so we can use 32-bit load/store. MOVV $~3, R3 AND R1, R3 // Compute val shift. #ifdef GOARCH_mips64 // Big endian. ptr = ptr ^ 3 XOR $3, R1 #endif // R4 = ((ptr & 3) * 8) AND $3, R1, R4 SLLV $3, R4 // Shift val for aligned ptr. R2 = val << R4 | ^(0xFF << R4) MOVV $0xFF, R5 SLLV R4, R2 SLLV R4, R5 NOR R0, R5 OR R5, R2 SYNC LL (R3), R4 AND R2, R4 SC R4, (R3) BEQ R4, -4(PC) SYNC RET // func Or(addr *uint32, v uint32) TEXT ·Or(SB), NOSPLIT, $0-12 MOVV ptr+0(FP), R1 MOVW val+8(FP), R2 SYNC LL (R1), R3 OR R2, R3 SC R3, (R1) BEQ R3, -4(PC) SYNC RET // func And(addr *uint32, v uint32) TEXT ·And(SB), NOSPLIT, $0-12 MOVV ptr+0(FP), R1 MOVW val+8(FP), R2 SYNC LL (R1), R3 AND R2, R3 SC R3, (R1) BEQ R3, -4(PC) SYNC RET // uint32 ·Load(uint32 volatile* ptr) TEXT ·Load(SB),NOSPLIT|NOFRAME,$0-12 MOVV ptr+0(FP), R1 SYNC MOVWU 0(R1), R1 SYNC MOVW R1, ret+8(FP) RET // uint8 ·Load8(uint8 volatile* ptr) TEXT ·Load8(SB),NOSPLIT|NOFRAME,$0-9 MOVV ptr+0(FP), R1 SYNC MOVBU 0(R1), R1 SYNC MOVB R1, ret+8(FP) RET // uint64 ·Load64(uint64 volatile* ptr) TEXT ·Load64(SB),NOSPLIT|NOFRAME,$0-16 MOVV ptr+0(FP), R1 SYNC MOVV 0(R1), R1 SYNC MOVV R1, ret+8(FP) RET // void *·Loadp(void *volatile *ptr) TEXT ·Loadp(SB),NOSPLIT|NOFRAME,$0-16 MOVV ptr+0(FP), R1 SYNC MOVV 0(R1), R1 SYNC MOVV R1, ret+8(FP) RET // uint32 ·LoadAcq(uint32 volatile* ptr) TEXT ·LoadAcq(SB),NOSPLIT|NOFRAME,$0-12 JMP atomic·Load(SB) // uint64 ·LoadAcq64(uint64 volatile* ptr) TEXT ·LoadAcq64(SB),NOSPLIT|NOFRAME,$0-16 JMP atomic·Load64(SB) // uintptr ·LoadAcquintptr(uintptr volatile* ptr) TEXT ·LoadAcquintptr(SB),NOSPLIT|NOFRAME,$0-16 JMP atomic·Load64(SB)
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