1 files changed, 85 insertions, 0 deletions
diff --git a/newlib/libc/machine/hppa/memset.S b/newlib/libc/machine/hppa/memset.S
new file mode 100644
index 0000000..cea7382
--- /dev/null
+++ b/newlib/libc/machine/hppa/memset.S
@@ -0,0 +1,85 @@
+/*
+ *  (c) Copyright 1986 HEWLETT-PACKARD COMPANY
+ *
+ *  To anyone who acknowledges that this file is provided "AS IS"
+ *  without any express or implied warranty:
+ *      permission to use, copy, modify, and distribute this file
+ *  for any purpose is hereby granted without fee, provided that
+ *  the above copyright notice and this notice appears in all
+ *  copies, and that the name of Hewlett-Packard Company not be
+ *  used in advertising or publicity pertaining to distribution
+ *  of the software without specific, written prior permission.
+ *  Hewlett-Packard Company makes no representations about the
+ *  suitability of this software for any purpose.
+ */
+
+/* SPECTRUM_ID: @(#)memset.s	37.4     86/08/25 */
+/*
+ * memset(s, c, n)
+ *
+ * Sets first n chars in memory area s to value of character c.
+ * Returns s.
+ */
+#ifndef _NAMESPACE_CLEAN
+#define NOSECDEF   /* prevent _memset from being defined as entry */
+#endif
+
+#include "DEFS.h"
+
+#define TO	arg0
+#define FILLCHAR arg1
+#define COUNT	arg2
+#define TMP	r31
+
+ENTRY(memset)
+	comb,<=	COUNT,r0,msexit /* return if count not positive */
+	copy	TO,ret0 	/* return value is start of copy */
+	comibf,<,n	5,COUNT,msbyteloop /* be straightforward */
+
+	dep	FILLCHAR,23,8,FILLCHAR	/* dup low byte  */
+	dep	FILLCHAR,15,16,FILLCHAR /* into high bytes */
+
+	add		TO,COUNT,TMP	/* TMP points just past fill area */
+	stbys,m		FILLCHAR,0(TO)	/* fill out first word */
+	/*
+	 * If we're pointing to high-order byte, no fill will happen,
+	 * but permissions will be checked.  We don't want this (we
+	 * might be pointing at the beginning of a protected region),
+	 * so we branch around stbys if neither low bits are set.
+	 */
+	bb,<,n		TMP,31,filend	/* if low bit is set, stbys */
+	bb,>=,n		TMP,30,endfil	/* if next lowest bit isn't set */
+					/*  (and lowest isn't, either) */
+					/*  do not stbys */
+filend:
+	stbys,m,e	FILLCHAR,0(TMP)	/* fill out the last */
+endfil:
+	addi		4, TO, TO
+	sub		TMP,TO,COUNT	/* will now divide by 4 */
+	comb,=,n	COUNT,r0,msexit /* If count is zero ret. */
+
+	extru,<>	COUNT,31,4,r1
+	b		msquadloop
+	depi		0,31,4,COUNT	/* will now divide by 16 */
+
+
+mswordloop:
+	addib,<>	-4,r1,mswordloop
+	stws,ma 	FILLCHAR,4(TO)
+
+	comb,=,n	COUNT,r0,msexit /* If count is zero ret. */
+
+msquadloop:
+	stws,ma 	FILLCHAR,4(TO)
+	stws,ma 	FILLCHAR,4(TO)
+	stws,ma 	FILLCHAR,4(TO)
+	addib,<>	-16,COUNT,msquadloop
+	stws,ma 	FILLCHAR,4(TO)
+	b,n		msexit
+
+msbyteloop:
+	addib,<>	-1,COUNT,msbyteloop
+	stbs,ma		FILLCHAR,1(TO)
+
+msexit:
+EXIT(memset)