Initial revision

lib/i86/string/bcmp.s

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+!	bcmp()						Author: Kees J. Bot
+!								27 Jan 1994
+.sect .text; .sect .rom; .sect .data; .sect .bss
+
+! int bcmp(const void *s1, const void *s2, size_t n)
+!	Compare two chunks of memory.
+!	This is a BSD routine that escaped from the kernel.  Don't use.
+!	(Alas it is not without some use, it reports the number of bytes
+!	after the bytes that are equal.  So it can't be simply replaced.)
+!
+.sect .text
+.define _bcmp
+_bcmp:
+	push	bp
+	mov	bp, sp
+	push	8(bp)
+	push	6(bp)
+	push	4(bp)
+	call	_memcmp		! Let memcmp do the work
+	mov	sp, bp
+	test	ax, ax
+	jz	equal
+	sub	dx, 4(bp)	! Memcmp was nice enough to leave "si" in dx
+	dec	dx		! Number of bytes that are equal
+	mov	ax, 8(bp)
+	sub	ax, dx		! Number of bytes that are unequal
+equal:	pop	bp
+	ret