Eric Lee / smarc-fsl-linux-kernel

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arch/x86/lib/strstr_32.c 674 Bytes
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1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  #include <linux/string.h>
f73920cd6   Paolo Ciarrocchi   x86: coding style... 
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  char *strstr(const char *cs, const char *ct)
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  {
  int	d0, d1;
f73920cd6   Paolo Ciarrocchi   x86: coding style... 
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  register char *__res;
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  __asm__ __volatile__(
  	"movl %6,%%edi
  \t"
  	"repne
  \t"
  	"scasb
  \t"
  	"notl %%ecx
  \t"
  	"decl %%ecx
  \t"	/* NOTE! This also sets Z if searchstring='' */
  	"movl %%ecx,%%edx
  "
  	"1:\tmovl %6,%%edi
  \t"
  	"movl %%esi,%%eax
  \t"
  	"movl %%edx,%%ecx
  \t"
  	"repe
  \t"
  	"cmpsb
  \t"
  	"je 2f
  \t"		/* also works for empty string, see above */
  	"xchgl %%eax,%%esi
  \t"
  	"incl %%esi
  \t"
  	"cmpb $0,-1(%%eax)
  \t"
  	"jne 1b
  \t"
  	"xorl %%eax,%%eax
  \t"
  	"2:"
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  	: "=a" (__res), "=&c" (d0), "=&S" (d1)
  	: "0" (0), "1" (0xffffffff), "2" (cs), "g" (ct)
  	: "dx", "di");
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  return __res;
  }