date and time created 90/05/12 16:16:23 by bostic

SCCS-vsn: lib/libc/hp300/string/strcmp.s 5.1

diff --git a/usr/src/lib/libc/hp300/string/strcmp.s b/usr/src/lib/libc/hp300/string/strcmp.s
new file mode 100644 (file)
index 0000000..470a833
--- /dev/null
+++ b/usr/src/lib/libc/hp300/string/strcmp.s
@@ -0,0 +1,38 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * the Systems Programming Group of the University of Utah Computer
+ * Science Department.
+ *
+ * %sccs.include.redist.c%
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+       .asciz "@(#)strcmp.s    5.1 (Berkeley) %G%"
+#endif /* LIBC_SCCS and not lint */
+
+#include "DEFS.h"
+
+/*
+ * NOTE: this guy returns result compatible with the VAX assembly version.
+ * The C version on the portable gen directory returns different results
+ * (different signs!) when comparing chars with the high bit on.  Who is
+ * right??
+ */
+ENTRY(strcmp)
+       movl    sp@(4),a0       /* a0 = string1 */
+       movl    sp@(8),a1       /* a1 = string2 */
+scloop:
+       movb    a0@+,d0         /* get *string1 */
+       cmpb    a1@+,d0         /* compare a byte */
+       jne     scexit          /* not equal, break out */
+       tstb    d0              /* at end of string1? */
+       jne     scloop          /* no, keep going */
+       moveq   #0,d0           /* strings are equal */
+       rts
+scexit:
+       subb    a1@-,d0         /* *string1 - *string2 */
+       extbl   d0
+       rts