patch-2.3.99-pre6 linux/include/asm-i386/string.h

• Lines: 37
• Date: Wed Apr 26 15:29:07 2000
• Orig file: v2.3.99-pre5/linux/include/asm-i386/string.h
• Orig date: Mon Mar 27 08:08:31 2000

diff -u --recursive --new-file v2.3.99-pre5/linux/include/asm-i386/string.h linux/include/asm-i386/string.h
@@ -452,6 +452,36 @@
 }
 /* end of additional stuff */
 
+#define __HAVE_ARCH_STRSTR
+extern inline char * strstr(const char * cs,const char * ct)
+{
+int	d0, d1;
+register char * __res;
+__asm__ __volatile__(
+	"movl %6,%%edi\n\t"
+	"repne\n\t"
+	"scasb\n\t"
+	"notl %%ecx\n\t"
+	"decl %%ecx\n\t"	/* NOTE! This also sets Z if searchstring='' */
+	"movl %%ecx,%%edx\n"
+	"1:\tmovl %6,%%edi\n\t"
+	"movl %%esi,%%eax\n\t"
+	"movl %%edx,%%ecx\n\t"
+	"repe\n\t"
+	"cmpsb\n\t"
+	"je 2f\n\t"		/* also works for empty string, see above */
+	"xchgl %%eax,%%esi\n\t"
+	"incl %%esi\n\t"
+	"cmpb $0,-1(%%eax)\n\t"
+	"jne 1b\n\t"
+	"xorl %%eax,%%eax\n\t"
+	"2:"
+	:"=a" (__res), "=&c" (d0), "=&S" (d1)
+	:"0" (0), "1" (0xffffffff), "2" (cs), "g" (ct)
+	:"dx", "di");
+return __res;
+}
+
 /*
  * This looks horribly ugly, but the compiler can optimize it totally,
  * as we by now know that both pattern and count is constant..