ref: e7398383ed59cfcf02d8916fed0d0be3421822cd
dir: /atomic-arm64.s/
/* get variants */ TEXT agetl+0(SB),1,$0 MOVW (R0), R0 RETURN TEXT agetv+0(SB),1,$0 TEXT agetp+0(SB),1,$0 MOV (R0), R0 RETURN /* set variants */ TEXT asetl+0(SB),1,$0 MOV 0x08(FP), R1 MOV R0, R2 _setl: LDAXRW (R2), R0 STLXRW R1, (R2), R3 CBNZW R3, _setl RETURN TEXT asetv+0(SB),1,$0 TEXT asetp+0(SB),1,$0 MOV 0x08(FP), R1 MOV R0, R2 _setp: LDAXR (R2), R0 STLXR R1, (R2), R3 CBNZW R3, _setp RETURN /* inc variants */ TEXT aincl+0(SB),1,$0 MOV 0x08(FP), R1 MOV R0, R2 _incl: LDAXRW (R2), R0 ADDW R1, R0, R3 STLXRW R3, (R2), R4 CBNZW R4, _incl RETURN TEXT aincv+0(SB),1,$0 TEXT aincp+0(SB),1,$0 MOV 0x08(FP), R1 MOV R0, R2 _incp: LDAXR (R2), R0 ADD R1, R0, R3 STLXR R3, (R2), R4 CBNZW R4, _incp RETURN /* cas variants */ TEXT acasl+0(SB),1,$0 MOV 0x08(FP), R1 MOV 0x10(FP), R2 LDAXRW (R0), R3 CMPW R1, R3 BNE _casl STLXRW R2, (R0), R4 CMPW $0, R4 _casl: CSETW EQ, R0 RETURN TEXT acasv+0(SB),1,$0 TEXT acasp+0(SB),1,$0 MOV 0x08(FP), R1 MOV 0x10(FP), R2 LDAXR (R0), R3 CMP R1, R3 BNE _casp STLXR R2, (R0), R4 CMPW $0, R4 _casp: CSETW EQ, R0 RETURN /* barriers */ #define ISH (2<<2 | 3) TEXT coherence+0(SB),1,$0 DMB $ISH RETURN