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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/blackfin/lib/strcmp.S
Initial import
Diffstat (limited to 'arch/blackfin/lib/strcmp.S')
-rw-r--r--arch/blackfin/lib/strcmp.S43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/blackfin/lib/strcmp.S b/arch/blackfin/lib/strcmp.S
new file mode 100644
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--- /dev/null
+++ b/arch/blackfin/lib/strcmp.S
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2005-2010 Analog Devices Inc.
+ *
+ * Licensed under the Clear BSD license or the GPL-2 (or later)
+ */
+
+#include <linux/linkage.h>
+
+/* void *strcmp(char *s1, const char *s2);
+ * R0 = address (s1)
+ * R1 = address (s2)
+ *
+ * Returns an integer less than, equal to, or greater than zero if s1
+ * (or the first n bytes thereof) is found, respectively, to be less
+ * than, to match, or be greater than s2.
+ */
+
+#ifdef CONFIG_STRCMP_L1
+.section .l1.text
+#else
+.text
+#endif
+
+.align 2
+
+ENTRY(_strcmp)
+ P0 = R0 ; /* s1 */
+ P1 = R1 ; /* s2 */
+
+1:
+ R0 = B[P0++] (Z); /* get *s1 */
+ R1 = B[P1++] (Z); /* get *s2 */
+ CC = R0 == R1; /* compare a byte */
+ if ! cc jump 2f; /* not equal, break out */
+ CC = R0; /* at end of s1? */
+ if cc jump 1b (bp); /* no, keep going */
+ jump.s 3f; /* strings are equal */
+2:
+ R0 = R0 - R1; /* *s1 - *s2 */
+3:
+ RTS;
+
+ENDPROC(_strcmp)