1 files changed, 51 insertions, 0 deletions
diff --git a/newlib/libc/machine/h8300/memset.S b/newlib/libc/machine/h8300/memset.S
new file mode 100644
index 0000000..c12f17b
--- /dev/null
+++ b/newlib/libc/machine/h8300/memset.S
@@ -0,0 +1,51 @@
+#include "defines.h"
+
+#ifdef __H8300H__
+	.h8300h
+#endif
+
+#ifdef __H8300S__
+	.h8300s
+#endif
+
+
+; A0P pointer to cursor
+; A1P thing to copy
+	.global	_memset
+
+_memset:
+
+;	MOVP	@(2/4,r7),A2P	; dst
+;	MOVP	@(4/8,r7),A1	; src thing
+;	MOVP	@(6/12,r7),A3P	; len
+
+	MOVP	A2P,A2P
+	beq	quit
+
+	; A3 points to the end of the area
+	MOVP	A0P,A3P
+	ADDP	A2P,A3P
+
+	; see if we can do it in words
+	; by oring in the start of the buffer to the end address
+
+	or	A0L,A2L
+	btst	#0,A2L
+	bne	byteloop
+	
+	; we can do it a word at a time
+
+	mov.b	A1L,A1H	
+
+wordloop:
+	mov.w	A1,@-A3P
+	CMPP	A3P,A0P
+	bne	wordloop
+quit:	rts	
+
+byteloop:
+	mov.b	A1L,@-A3P
+	CMPP	A3P,A0P
+	bne	byteloop
+	rts
+