summaryrefslogtreecommitdiff
path: root/libc
diff options
context:
space:
mode:
Diffstat (limited to 'libc')
-rw-r--r--libc/string/i386/rawmemchr.c24
-rw-r--r--libc/string/i386/strlen.c18
2 files changed, 33 insertions, 9 deletions
diff --git a/libc/string/i386/rawmemchr.c b/libc/string/i386/rawmemchr.c
new file mode 100644
index 000000000..be0b142c3
--- /dev/null
+++ b/libc/string/i386/rawmemchr.c
@@ -0,0 +1,24 @@
+/*
+ * Adapted from strlen.c code
+ *
+ * Copyright (C) 2008 Denys Vlasenko <vda.linux@googlemail.com>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <string.h>
+
+#undef rawmemchr
+void *rawmemchr(const void *s, int c)
+{
+ void *eax;
+ int ecx, edi;
+ __asm__ __volatile__(
+ " repne; scasb\n"
+ " leal -1(%%edi), %%eax\n"
+ : "=&c" (ecx), "=&D" (edi), "=&a" (eax)
+ : "0" (0xffffffff), "1" (s), "2" (c)
+ );
+ return eax;
+}
+libc_hidden_def(rawmemchr)
diff --git a/libc/string/i386/strlen.c b/libc/string/i386/strlen.c
index 761d27aae..ff2baeb38 100644
--- a/libc/string/i386/strlen.c
+++ b/libc/string/i386/strlen.c
@@ -35,14 +35,14 @@
#undef strlen
size_t strlen(const char *s)
{
- int d0;
- register int __res;
- __asm__ __volatile__(
- "repne\n\t"
- "scasb\n\t"
- "notl %0\n\t"
- "decl %0"
- :"=c" (__res), "=&D" (d0) :"1" (s),"a" (0), "0" (0xffffffff));
- return __res;
+ int eax, ecx, edi;
+ __asm__ __volatile__(
+ " repne; scasb\n"
+ " notl %%ecx\n"
+ " leal -1(%%ecx), %%eax\n"
+ : "=&c" (ecx), "=&D" (edi), "=&a" (eax)
+ : "0" (0xffffffff), "1" (s), "2" (0)
+ );
+ return eax;
}
libc_hidden_def(strlen)