[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/strncmp.c b/ap/build/uClibc/libc/string/i386/strncmp.c
new file mode 100644
index 0000000..bfb20c3
--- /dev/null
+++ b/ap/build/uClibc/libc/string/i386/strncmp.c
@@ -0,0 +1,59 @@
+/*
+ * 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 strncmp
+int strncmp(const char *cs, const char *ct, size_t count)
+{
+ int eax;
+ int esi, edi, ecx;
+ __asm__ __volatile__(
+ " incl %%ecx\n"
+ "1: decl %%ecx\n"
+ " jz 2f\n"
+ " lodsb\n"
+ " scasb\n"
+ " jne 3f\n"
+ " testb %%al, %%al\n"
+ " jnz 1b\n"
+ "2: xorl %%eax, %%eax\n"
+ " jmp 4f\n"
+ "3: sbbl %%eax, %%eax\n"
+ " orb $1, %%al\n"
+ "4:\n"
+ : "=a" (eax), "=&S" (esi), "=&D" (edi), "=&c" (ecx)
+ : "1" (cs), "2" (ct), "3" (count)
+ );
+ return eax;
+}
+libc_hidden_weak(strncmp)