ref: ac3ddb687ea2f6dde774292d1146210705821bbc
dir: /atomic-amd64.s/
/* get variants */ TEXT agetl+0(SB),1,$0 MOVL (RARG), AX RET TEXT agetv+0(SB),1,$0 TEXT agetp+0(SB),1,$0 MOVQ (RARG), AX RET /* set variants */ TEXT asetl+0(SB),1,$0 MOVL v+8(FP), AX LOCK; XCHGL (RARG), AX RET TEXT asetv+0(SB),1,$0 TEXT asetp+0(SB),1,$0 MOVQ v+8(FP), AX LOCK; XCHGQ (RARG), AX RET /* inc variants */ TEXT aincl+0(SB),1,$0 MOVQ v+8(FP), AX LOCK; XADDL AX, (RARG) RET TEXT aincv+0(SB),1,$0 TEXT aincp+0(SB),1,$0 MOVQ v+8(FP), AX LOCK; XADDQ AX, (RARG) RET /* cas variants */ TEXT acasl+0(SB),1,$0 MOVL c+8(FP), AX MOVL v+16(FP), BX LOCK; CMPXCHGL BX, (RARG) MOVL $1, AX /* use CMOVLEQ etc. here? */ JNZ fail32 RET fail32: DECL AX RET TEXT acasv+0(SB),1,$0 TEXT acasp+0(SB),1,$0 MOVQ c+8(FP), AX MOVQ v+16(FP), BX LOCK; CMPXCHGQ BX, (RARG) MOVL $1, AX /* use CMOVLEQ etc. here? */ JNZ fail64 RET fail64: DECL AX RET /* barriers (do we want to distinguish types?) */ TEXT coherence+0(SB),1,$0 MFENCE