diff options
Diffstat (limited to 'src/runtime/asm_arm.s')
| -rw-r--r-- | src/runtime/asm_arm.s | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/src/runtime/asm_arm.s b/src/runtime/asm_arm.s index 62f2a276e7..48fc321df3 100644 --- a/src/runtime/asm_arm.s +++ b/src/runtime/asm_arm.s @@ -695,63 +695,6 @@ TEXT runtime·abort(SB),NOSPLIT,$-4-0 MOVW $0, R0 MOVW (R0), R1 -// bool armcas(int32 *val, int32 old, int32 new) -// Atomically: -// if(*val == old){ -// *val = new; -// return 1; -// }else -// return 0; -// -// To implement runtime·cas in sys_$GOOS_arm.s -// using the native instructions, use: -// -// TEXT runtime·cas(SB),NOSPLIT,$0 -// B runtime·armcas(SB) -// -TEXT runtime·armcas(SB),NOSPLIT,$0-13 - MOVW valptr+0(FP), R1 - MOVW old+4(FP), R2 - MOVW new+8(FP), R3 -casl: - LDREX (R1), R0 - CMP R0, R2 - BNE casfail - - MOVB runtime·goarm(SB), R11 - CMP $7, R11 - BLT 2(PC) - WORD $0xf57ff05a // dmb ishst - - STREX R3, (R1), R0 - CMP $0, R0 - BNE casl - MOVW $1, R0 - - MOVB runtime·goarm(SB), R11 - CMP $7, R11 - BLT 2(PC) - WORD $0xf57ff05b // dmb ish - - MOVB R0, ret+12(FP) - RET -casfail: - MOVW $0, R0 - MOVB R0, ret+12(FP) - RET - -TEXT runtime·casuintptr(SB),NOSPLIT,$0-13 - B runtime·cas(SB) - -TEXT runtime·atomicloaduintptr(SB),NOSPLIT,$0-8 - B runtime·atomicload(SB) - -TEXT runtime·atomicloaduint(SB),NOSPLIT,$0-8 - B runtime·atomicload(SB) - -TEXT runtime·atomicstoreuintptr(SB),NOSPLIT,$0-8 - B runtime·atomicstore(SB) - // armPublicationBarrier is a native store/store barrier for ARMv7+. // On earlier ARM revisions, armPublicationBarrier is a no-op. // This will not work on SMP ARMv6 machines, if any are in use. |