ref: 3ec84c5d7364c8ed4602561743bf35e3b399e53d
dir: /sys/src/libc/power/atom.s/
TEXT ainc(SB),$0 /* long ainc(long *); */ MOVW R3, R4 xincloop: LWAR (R4), R3 ADD $1, R3 DCBT (R4) /* fix 405 errata cpu_210 */ STWCCC R3, (R4) BNE xincloop RETURN TEXT adec(SB),$0 /* long adec(long *); */ MOVW R3, R4 xdecloop: LWAR (R4), R3 ADD $-1, R3 DCBT (R4) /* fix 405 errata cpu_210 */ STWCCC R3, (R4) BNE xdecloop RETURN TEXT loadlink(SB), $0 LWAR (R3), R3 RETURN TEXT storecond(SB), $0 MOVW val+4(FP), R4 DCBT (R3) /* fix 405 errata cpu_210 */ STWCCC R4, (R3) BNE storecondfail MOVW $1, R3 RETURN storecondfail: MOVW $0, R3 RETURN /* * int cas32(u32int *p, u32int ov, u32int nv); * int cas(uint *p, int ov, int nv); * int casp(void **p, void *ov, void *nv); * int casl(ulong *p, ulong ov, ulong nv); */ TEXT cas32+0(SB),0,$0 TEXT cas+0(SB),0,$0 TEXT casp+0(SB),0,$0 TEXT casl+0(SB),0,$0 MOVW ov+4(FP),R4 MOVW nv+8(FP),R8 LWAR (R3),R5 CMP R5,R4 BNE fail DCBT (R3) /* fix 405 errata cpu_210 */ STWCCC R8,(R3) BNE fail1 MOVW $1,R3 RETURN fail: DCBT (R3) /* fix 405 errata cpu_210 */ STWCCC R5,(R3) /* give up exclusive access */ fail1: MOVW R0,R3 RETURN END