Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Most of the string-functions are rather heavily hand-optimized,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * see especially strsep,strstr,str[c]spn. They should work, but are not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * very easy to understand. Everything is done entirely within the register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * set, making the functions fast and clean. String instructions have been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * used through-out, making for "slightly" unclear code :-)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * AK: On P4 and K7 using non string instruction implementations might be faster
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * for large memory blocks. But most of them are unlikely to be used on large
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * strings.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #ifdef __HAVE_ARCH_STRCPY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) char *strcpy(char *dest, const char *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	int d0, d1, d2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	asm volatile("1:\tlodsb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 		"stosb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 		"testb %%al,%%al\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 		"jne 1b"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 		: "=&S" (d0), "=&D" (d1), "=&a" (d2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 		: "0" (src), "1" (dest) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	return dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) EXPORT_SYMBOL(strcpy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #ifdef __HAVE_ARCH_STRNCPY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) char *strncpy(char *dest, const char *src, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	int d0, d1, d2, d3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	asm volatile("1:\tdecl %2\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		"js 2f\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		"lodsb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		"stosb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		"testb %%al,%%al\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		"jne 1b\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		"rep\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		"stosb\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		"2:"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		: "=&S" (d0), "=&D" (d1), "=&c" (d2), "=&a" (d3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		: "0" (src), "1" (dest), "2" (count) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	return dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) EXPORT_SYMBOL(strncpy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) #ifdef __HAVE_ARCH_STRCAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) char *strcat(char *dest, const char *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	int d0, d1, d2, d3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	asm volatile("repne\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		"scasb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		"decl %1\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		"1:\tlodsb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		"stosb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		"testb %%al,%%al\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		"jne 1b"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		: "=&S" (d0), "=&D" (d1), "=&a" (d2), "=&c" (d3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		: "0" (src), "1" (dest), "2" (0), "3" (0xffffffffu) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	return dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) EXPORT_SYMBOL(strcat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) #ifdef __HAVE_ARCH_STRNCAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) char *strncat(char *dest, const char *src, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	int d0, d1, d2, d3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	asm volatile("repne\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		"scasb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		"decl %1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		"movl %8,%3\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		"1:\tdecl %3\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		"js 2f\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		"lodsb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		"stosb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		"testb %%al,%%al\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		"jne 1b\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		"2:\txorl %2,%2\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		"stosb"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		: "=&S" (d0), "=&D" (d1), "=&a" (d2), "=&c" (d3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		: "0" (src), "1" (dest), "2" (0), "3" (0xffffffffu), "g" (count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		: "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	return dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) EXPORT_SYMBOL(strncat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) #ifdef __HAVE_ARCH_STRCMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) int strcmp(const char *cs, const char *ct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	int d0, d1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	asm volatile("1:\tlodsb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		"scasb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		"jne 2f\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		"testb %%al,%%al\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		"jne 1b\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		"xorl %%eax,%%eax\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		"jmp 3f\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		"2:\tsbbl %%eax,%%eax\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		"orb $1,%%al\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		"3:"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		: "=a" (res), "=&S" (d0), "=&D" (d1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		: "1" (cs), "2" (ct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		: "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) EXPORT_SYMBOL(strcmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #ifdef __HAVE_ARCH_STRNCMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) int strncmp(const char *cs, const char *ct, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	int d0, d1, d2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	asm volatile("1:\tdecl %3\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		"js 2f\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		"lodsb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		"scasb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		"jne 3f\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		"testb %%al,%%al\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		"jne 1b\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		"2:\txorl %%eax,%%eax\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		"jmp 4f\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		"3:\tsbbl %%eax,%%eax\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		"orb $1,%%al\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		"4:"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		: "=a" (res), "=&S" (d0), "=&D" (d1), "=&c" (d2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		: "1" (cs), "2" (ct), "3" (count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		: "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) EXPORT_SYMBOL(strncmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #ifdef __HAVE_ARCH_STRCHR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) char *strchr(const char *s, int c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	int d0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	char *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	asm volatile("movb %%al,%%ah\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		"1:\tlodsb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		"cmpb %%ah,%%al\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		"je 2f\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		"testb %%al,%%al\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		"jne 1b\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		"movl $1,%1\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		"2:\tmovl %1,%0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		"decl %0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		: "=a" (res), "=&S" (d0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		: "1" (s), "0" (c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		: "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) EXPORT_SYMBOL(strchr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) #ifdef __HAVE_ARCH_STRLEN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) size_t strlen(const char *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	int d0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	size_t res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	asm volatile("repne\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		"scasb"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		: "=c" (res), "=&D" (d0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		: "1" (s), "a" (0), "0" (0xffffffffu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		: "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	return ~res - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) EXPORT_SYMBOL(strlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) #ifdef __HAVE_ARCH_MEMCHR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) void *memchr(const void *cs, int c, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	int d0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	void *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	if (!count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	asm volatile("repne\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		"scasb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		"je 1f\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		"movl $1,%0\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		"1:\tdecl %0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		: "=D" (res), "=&c" (d0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		: "a" (c), "0" (cs), "1" (count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		: "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) EXPORT_SYMBOL(memchr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) #ifdef __HAVE_ARCH_MEMSCAN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) void *memscan(void *addr, int c, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	if (!size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		return addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	asm volatile("repnz; scasb\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	    "jnz 1f\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	    "dec %%edi\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	    "1:"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	    : "=D" (addr), "=c" (size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	    : "0" (addr), "1" (size), "a" (c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	    : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	return addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) EXPORT_SYMBOL(memscan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) #ifdef __HAVE_ARCH_STRNLEN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) size_t strnlen(const char *s, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	int d0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	asm volatile("movl %2,%0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		"jmp 2f\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		"1:\tcmpb $0,(%0)\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		"je 3f\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		"incl %0\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		"2:\tdecl %1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		"cmpl $-1,%1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		"jne 1b\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		"3:\tsubl %2,%0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		: "=a" (res), "=&d" (d0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		: "c" (s), "1" (count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		: "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) EXPORT_SYMBOL(strnlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) #endif