ref: c9fdc09053a80ea0ae1c2c1ba5bb4a4597628a2f
dir: /sys/src/libthread/xincpower.s/
TEXT _xinc(SB),$0 /* void _xinc(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 _xdec(SB),$0 /* long _xdec(long *); */ MOVW R3, R4 xdecloop: LWAR (R4), R3 ADD $-1, R3 DCBT (R4) /* fix 405 errata cpu_210 */ STWCCC R3, (R4) BNE xdecloop RETURN