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- TEXT memmove(SB), $0
- TEXT memcpy(SB), $0
- MOVL p1+0(FP), DI
- MOVL p2+4(FP), SI
- MOVL n+8(FP), BX
- CMPL BX, $0
- JGE ok
- MOVL $0, SI
- ok:
- CLD
- /*
- * check and set for backwards
- */
- CMPL SI, DI
- JLS back
- /*
- * copy whole longs
- */
- MOVL BX, CX
- SHRL $2, CX
- REP; MOVSL
- /*
- * copy the rest, by bytes
- */
- ANDL $3, BX
- MOVL BX, CX
- REP; MOVSB
- MOVL p+0(FP),AX
- RET
- /*
- * whole thing backwards has
- * adjusted addresses
- */
- back:
- ADDL BX, DI
- ADDL BX, SI
- SUBL $4, DI
- SUBL $4, SI
- STD
- /*
- * copy whole longs
- */
- MOVL BX, CX
- SHRL $2, CX
- ANDL $3, BX
- REP; MOVSL
- /*
- * copy the rest, by bytes
- */
- ADDL $3, DI
- ADDL $3, SI
- MOVL BX, CX
- REP; MOVSB
- MOVL p+0(FP),AX
- RET
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