[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/build/uClibc/libc/string/i386/strlen.c b/ap/build/uClibc/libc/string/i386/strlen.c
new file mode 100644
index 0000000..ff2baeb
--- /dev/null
+++ b/ap/build/uClibc/libc/string/i386/strlen.c
@@ -0,0 +1,48 @@
+/*
+ * This string-include defines all string functions as inline
+ * functions. Use gcc. It also assumes ds=es=data space, this should be
+ * normal. Most of the string-functions are rather heavily hand-optimized,
+ * see especially strtok,strstr,str[c]spn. They should work, but are not
+ * very easy to understand. Everything is done entirely within the register
+ * set, making the functions fast and clean. String instructions have been
+ * used through-out, making for "slightly" unclear code :-)
+ *
+ * NO Copyright (C) 1991, 1992 Linus Torvalds,
+ * consider these trivial functions to be PD.
+ */
+
+/*
+ * Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/*
+ * Modified for uClibc by Erik Andersen <andersen@codepoet.org>
+ * These make no attempt to use nifty things like mmx/3dnow/etc.
+ * These are not inline, and will therefore not be as fast as
+ * modifying the headers to use inlines (and cannot therefore
+ * do tricky things when dealing with const memory). But they
+ * should (I hope!) be faster than their generic equivalents....
+ *
+ * More importantly, these should provide a good example for
+ * others to follow when adding arch specific optimizations.
+ * -Erik
+ */
+
+#include <string.h>
+
+#undef strlen
+size_t strlen(const char *s)
+{
+ 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)