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[/] [or1k/] [tags/] [tn_m001/] [newlib/] [newlib/] [libc/] [machine/] [i386/] [memcpy.S] - Blame information for rev 1780

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1 56 joel 
/*
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 * ====================================================
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 * Copyright (C) 1998 by Cygnus Solutions. All rights reserved.
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 *
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 * Permission to use, copy, modify, and distribute this
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 * software is freely granted, provided that this notice
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 * is preserved.
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 * ====================================================
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 */
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        #include "i386mach.h"
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        .global SYM (memcpy)
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SYM (memcpy):
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        pushl ebp
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        movl esp,ebp
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        pushl esi
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        pushl edi
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        pushl ebx
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        movl 8(ebp),edi
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        movl 16(ebp),ecx
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        movl 12(ebp),esi
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        cld
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#ifndef __OPTIMIZE_SIZE__
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        cmpl $8,ecx
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        jbe .L3
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/* move any preceding bytes until destination address is long word aligned */
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        movl edi,edx
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        movl ecx,ebx
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        andl $3,edx
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        jz .L11
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        movl $4,ecx
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        subl edx,ecx
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        andl $3,ecx
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        subl ecx,ebx
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        rep
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        movsb
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        mov ebx,ecx
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/* move bytes a long word at a time */
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.L11:
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        shrl $2,ecx
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        .p2align 2
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        rep
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        movsl
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        movl ebx,ecx
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        andl $3,ecx
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#endif /* !__OPTIMIZE_SIZE__ */
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/* handle any remaining bytes */
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.L3:
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        rep
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        movsb
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.L5:
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        movl 8(ebp),eax
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        leal -12(ebp),esp
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        popl ebx
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        popl edi
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        popl esi
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        leave
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        ret

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