TEXT memset(SB),$0
CLD
MOVL p+0(FP), DI
MOVBLZX c+4(FP), AX
MOVL n+8(FP), BX
/*
* if not enough bytes, just set bytes
*/
CMPL BX, $9
JLS c3
/*
* build word in AX
*/
MOVB AL, AH
MOVL AX, CX
SHLL $16, CX
ORL CX, AX
/*
* set whole longs
*/
c1:
MOVL BX, CX
SHRL $2, CX
ANDL $3, BX
REP; STOSL
/*
* set the rest, by bytes
*/
c3:
MOVL BX, CX
REP; STOSB
ret:
MOVL p+0(FP),AX
RET
|