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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1627 | serge | 1 | /* bcmp() Author: Kees J. Bot */ |
| 2 | /* 2 Jan 1994 */ |
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| 3 | |||
| 4 | /* int bcmp(const void *s1, const void *s2, size_t n) */ |
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| 5 | /* Compare two chunks of memory. */ |
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| 6 | /* This is a BSD routine that escaped from the kernel. Don't use. */ |
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| 7 | /* (Alas it is not without some use, it reports the number of bytes */ |
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| 8 | /* after the bytes that are equal. So it can't be simply replaced.) */ |
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| 9 | /* */ |
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| 10 | #include "asm.h" |
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| 11 | |||
| 12 | ENTRY(bcmp) |
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| 13 | push %ebp |
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| 14 | movl %esp, %ebp |
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| 15 | push 16(%ebp) |
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| 16 | push 12(%ebp) |
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| 17 | push 8(%ebp) |
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| 18 | call _C_LABEL(memcmp) /* Let memcmp do the work */ |
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| 19 | testl %eax, %eax |
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| 20 | je equal |
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| 21 | subl 8(%ebp), %edx /* Memcmp was nice enough to leave "esi" in edx */ |
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| 22 | decl %edx /* Number of bytes that are equal */ |
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| 23 | movl 16(%ebp), %eax |
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| 24 | subl %edx, %eax /* Number of bytes that are unequal */ |
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| 25 | equal: |
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| 26 | leave |
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| 27 | ret |