1 files changed, 104 insertions, 0 deletions
diff --git a/include/asm-blackfin/string.h b/include/asm-blackfin/string.h
new file mode 100644
index 0000000..6f1eb7d
--- /dev/null
+++ b/include/asm-blackfin/string.h
@@ -0,0 +1,104 @@
+#ifndef _BLACKFIN_STRING_H_
+#define _BLACKFIN_STRING_H_
+
+#ifdef __KERNEL__		/* only set these up for kernel code */
+
+#define __HAVE_ARCH_STRCPY
+extern inline char *strcpy(char *dest, const char *src)
+{
+	char *xdest = dest;
+	char temp = 0;
+
+	__asm__ __volatile__
+	    ("1:\t%2 = B [%1++] (Z);\n\t"
+	     "B [%0++] = %2;\n\t"
+	     "CC = %2;\n\t"
+        "if cc jump 1b (bp);\n"
+	: "+&a" (dest), "+&a" (src), "=&d" (temp)
+	     ::"memory", "CC");
+	return xdest;
+}
+
+#define __HAVE_ARCH_STRNCPY
+extern inline char *strncpy(char *dest, const char *src, size_t n)
+{
+	char *xdest = dest;
+	char temp = 0;
+
+	if (n == 0)
+		return xdest;
+
+	__asm__ __volatile__
+	    ("1:\t%3 = B [%1++] (Z);\n\t"
+	     "B [%0++] = %3;\n\t"
+	     "CC = %3;\n\t"
+	     "if ! cc jump 2f;\n\t"
+	     "%2 += -1;\n\t"
+	     "CC = %2 == 0;\n\t"
+	     "if ! cc jump 1b (bp);\n"
+        "2:\n"
+	: "+&a" (dest), "+&a" (src), "+&da" (n), "=&d" (temp)
+	     ::"memory", "CC");
+	return xdest;
+}
+
+#define __HAVE_ARCH_STRCMP
+extern inline int strcmp(const char *cs, const char *ct)
+{
+	char __res1, __res2;
+
+	__asm__
+       ("1:\t%2 = B[%0++] (Z);\n\t" /* get *cs */
+		"%3 = B[%1++] (Z);\n\t"	/* get *ct */
+		"CC = %2 == %3;\n\t"	/* compare a byte */
+		"if ! cc jump 2f;\n\t"	/* not equal, break out */
+		"CC = %2;\n\t"	/* at end of cs? */
+		"if cc jump 1b (bp);\n\t"	/* no, keep going */
+		"jump.s 3f;\n"	/* strings are equal */
+		"2:\t%2 = %2 - %3;\n"	/* *cs - *ct */
+        "3:\n"
+	: "+&a" (cs), "+&a" (ct), "=&d" (__res1), "=&d" (__res2)
+      : :	"CC");
+
+	return __res1;
+}
+
+#define __HAVE_ARCH_STRNCMP
+extern inline int strncmp(const char *cs, const char *ct, size_t count)
+{
+	char __res1, __res2;
+
+	if (!count)
+		return 0;
+	__asm__
+       ("1:\t%3 = B[%0++] (Z);\n\t"        /* get *cs */
+		"%4 = B[%1++] (Z);\n\t"	/* get *ct */
+		"CC = %3 == %4;\n\t"	/* compare a byte */
+		"if ! cc jump 3f;\n\t"	/* not equal, break out */
+		"CC = %3;\n\t"	/* at end of cs? */
+		"if ! cc jump 4f;\n\t"	/* yes, all done */
+		"%2 += -1;\n\t"	/* no, adjust count */
+	"CC = %2 == 0;\n\t"
+        "if ! cc jump 1b;\n"                 /* more to do, keep going */
+		"2:\t%3 = 0;\n\t"	/* strings are equal */
+        "jump.s    4f;\n"
+        "3:\t%3 = %3 - %4;\n"          /* *cs - *ct */
+        "4:"
+	: "+&a" (cs), "+&a" (ct), "+&da" (count), "=&d" (__res1), "=&d" (__res2)
+      : :	"CC");
+	return __res1;
+}
+
+#define __HAVE_ARCH_MEMSET
+extern void *memset(void *s, int c, size_t count);
+#define __HAVE_ARCH_MEMCPY
+extern void *memcpy(void *d, const void *s, size_t count);
+#define __HAVE_ARCH_MEMCMP
+extern int memcmp(const void *, const void *, __kernel_size_t);
+#define	__HAVE_ARCH_MEMCHR
+extern void *memchr(const void *s, int c, size_t n);
+#define	__HAVE_ARCH_MEMMOVE
+extern void *memmove(void *dest, const void *src, size_t count);
+
+#endif /*__KERNEL__*/
+#endif				/* _BLACKFIN_STRING_H_ */