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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1029 | serge | 1 | #include "common.h" |
| 2 | |||
| 3 | char * strcat(char *s, const char *append) |
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| 4 | { |
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| 5 | int d0, d1, d2, d3; |
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| 6 | __asm__ __volatile__( |
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| 7 | "repne\n\t" |
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| 8 | "scasb\n\t" |
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| 9 | "decl %1\n" |
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| 10 | "1:\tlodsb\n\t" |
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| 11 | "stosb\n\t" |
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| 12 | "testb %%al,%%al\n\t" |
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| 13 | "jne 1b" |
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| 14 | : "=&S" (d0), "=&D" (d1), "=&a" (d2), "=&c" (d3) |
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| 15 | : "0" (append),"1"(s),"2"(0),"3" (0xffffffff):"memory"); |
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| 16 | return s; |
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| 17 | } |
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| 18 | |||
| 19 | int |
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| 20 | memcmp(const void *s1, const void *s2, size_t n) |
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| 21 | { |
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| 22 | if (n != 0) |
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| 23 | { |
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| 24 | const unsigned char *p1 = s1, *p2 = s2; |
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| 25 | |||
| 26 | do { |
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| 27 | if (*p1++ != *p2++) |
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| 28 | return (*--p1 - *--p2); |
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| 29 | } while (--n != 0); |
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| 30 | } |
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| 31 | return 0; |
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| 32 | } |
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| 33 | |||
| 34 | void * memcpy(void * _dest, const void *_src, size_t _n) |
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| 35 | { |
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| 36 | int d0, d1, d2; |
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| 37 | __asm__ __volatile__( |
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| 38 | "jcxz 1f\n\t" |
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| 39 | "rep ; movsl\n\t" |
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| 40 | "1:\t" |
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| 41 | "testb $2,%b4\n\t" |
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| 42 | "je 1f\n\t" |
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| 43 | "movsw\n" |
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| 44 | "1:\ttestb $1,%b4\n\t" |
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| 45 | "je 2f\n\t" |
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| 46 | "movsb\n" |
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| 47 | "2:" |
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| 48 | : "=&c" (d0), "=&D" (d1), "=&S" (d2) |
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| 49 | :"0" (_n/4), "q" (_n),"1" ((long)_dest),"2" ((long)_src) |
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| 50 | : "memory"); |
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| 51 | return (_dest); |
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| 52 | } |
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| 53 | |||
| 54 | char * strcpy(char *to, const char *from) |
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| 55 | { |
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| 56 | int d0, d1, d2; |
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| 57 | __asm__ __volatile__( |
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| 58 | "1:\tlodsb\n\t" |
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| 59 | "stosb\n\t" |
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| 60 | "testb %%al,%%al\n\t" |
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| 61 | "jne 1b" |
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| 62 | : "=&S" (d0), "=&D" (d1), "=&a" (d2) |
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| 63 | :"0" (from),"1" (to) : "memory"); |
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| 64 | return to; |
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| 65 | } |
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| 66 | |||
| 67 | int strcmp(const char *s1, const char *s2) |
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| 68 | { |
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| 69 | int d0, d1; |
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| 70 | register int __res; |
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| 71 | __asm__ __volatile__( |
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| 72 | "1:\tlodsb\n\t" |
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| 73 | "scasb\n\t" |
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| 74 | "jne 2f\n\t" |
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| 75 | "testb %%al,%%al\n\t" |
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| 76 | "jne 1b\n\t" |
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| 77 | "xorl %%eax,%%eax\n\t" |
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| 78 | "jmp 3f\n" |
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| 79 | "2:\tsbbl %%eax,%%eax\n\t" |
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| 80 | "orb $1,%%al\n" |
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| 81 | "3:" |
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| 82 | :"=a" (__res), "=&S" (d0), "=&D" (d1) |
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| 83 | :"1" (s1),"2" (s2)); |
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| 84 | return __res; |
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| 85 | } |
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| 86 | |||
| 87 | size_t strlen(const char *str) |
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| 88 | { |
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| 89 | int d0; |
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| 90 | register int __res; |
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| 91 | __asm__ __volatile__( |
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| 92 | "repne\n\t" |
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| 93 | "scasb\n\t" |
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| 94 | "notl %0\n\t" |
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| 95 | "decl %0" |
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| 96 | :"=c" (__res), "=&D" (d0) :"1" (str),"a" (0), "0" (0xffffffff)); |
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| 97 | return __res; |
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| 98 | } |
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| 99 | |||
| 100 | char * strdup(const char *_s) |
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| 101 | { |
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| 102 | char *rv; |
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| 103 | if (_s == 0) |
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| 104 | return 0; |
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| 105 | rv = (char *)malloc(strlen(_s) + 1); |
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| 106 | if (rv == 0) |
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| 107 | return 0; |
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| 108 | strcpy(rv, _s); |
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| 109 | return rv; |
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| 110 | } |
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| 111 | |||
| 112 | char * strchr(const char *s, int c) |
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| 113 | { |
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| 114 | int d0; |
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| 115 | register char * __res; |
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| 116 | __asm__ __volatile__( |
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| 117 | "movb %%al,%%ah\n" |
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| 118 | "1:\tlodsb\n\t" |
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| 119 | "cmpb %%ah,%%al\n\t" |
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| 120 | "je 2f\n\t" |
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| 121 | "testb %%al,%%al\n\t" |
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| 122 | "jne 1b\n\t" |
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| 123 | "movl $1,%1\n" |
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| 124 | "2:\tmovl %1,%0\n\t" |
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| 125 | "decl %0" |
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| 126 | :"=a" (__res), "=&S" (d0) : "1" (s),"0" (c)); |
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| 127 | return __res; |
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| 128 | } |