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Last change
on this file since 444 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.2 KB
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| 1 | /* |
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| 2 | * ==================================================== |
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| 3 | * Copyright (C) 1998, 2002 by Red Hat Inc. All rights reserved. |
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| 4 | * |
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| 5 | * Permission to use, copy, modify, and distribute this |
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| 6 | * software is freely granted, provided that this notice |
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| 7 | * is preserved. |
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| 8 | * ==================================================== |
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| 9 | */ |
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| 10 | |
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| 11 | #include "i386mach.h" |
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| 12 | |
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| 13 | .global SYM (memcpy) |
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| 14 | SOTYPE_FUNCTION(memcpy) |
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| 15 | |
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| 16 | SYM (memcpy): |
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| 17 | |
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| 18 | #ifdef __iamcu__ |
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| 19 | pushl esi |
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| 20 | pushl edi |
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| 21 | movl eax,edi |
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| 22 | movl edx,esi |
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| 23 | |
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| 24 | rep movsb |
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| 25 | |
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| 26 | popl edi |
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| 27 | popl esi |
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| 28 | #else |
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| 29 | pushl ebp |
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| 30 | movl esp,ebp |
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| 31 | pushl esi |
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| 32 | pushl edi |
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| 33 | pushl ebx |
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| 34 | movl 8(ebp),edi |
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| 35 | movl 16(ebp),ecx |
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| 36 | movl 12(ebp),esi |
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| 37 | cld |
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| 38 | |
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| 39 | #ifndef __OPTIMIZE_SIZE__ |
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| 40 | |
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| 41 | cmpl $8,ecx |
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| 42 | jbe .L3 |
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| 43 | |
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| 44 | /* move any preceding bytes until destination address is long word aligned */ |
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| 45 | |
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| 46 | movl edi,edx |
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| 47 | movl ecx,ebx |
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| 48 | andl $3,edx |
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| 49 | jz .L11 |
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| 50 | movl $4,ecx |
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| 51 | subl edx,ecx |
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| 52 | andl $3,ecx |
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| 53 | subl ecx,ebx |
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| 54 | rep |
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| 55 | movsb |
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| 56 | |
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| 57 | mov ebx,ecx |
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| 58 | |
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| 59 | /* move bytes a long word at a time */ |
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| 60 | |
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| 61 | .L11: |
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| 62 | shrl $2,ecx |
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| 63 | .p2align 2 |
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| 64 | rep |
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| 65 | movsl |
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| 66 | |
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| 67 | movl ebx,ecx |
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| 68 | andl $3,ecx |
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| 69 | |
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| 70 | #endif /* !__OPTIMIZE_SIZE__ */ |
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| 71 | |
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| 72 | /* handle any remaining bytes */ |
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| 73 | |
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| 74 | .L3: |
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| 75 | rep |
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| 76 | movsb |
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| 77 | .L5: |
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| 78 | movl 8(ebp),eax |
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| 79 | |
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| 80 | leal -12(ebp),esp |
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| 81 | popl ebx |
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| 82 | popl edi |
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| 83 | popl esi |
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| 84 | leave |
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| 85 | #endif |
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| 86 | ret |
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