Import newlib and create makefile

1 files changed, 121 insertions, 0 deletions

diff --git a/newlib/libc/machine/i960/memset.S b/newlib/libc/machine/i960/memset.S
new file mode 100644
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+++ b/newlib/libc/machine/i960/memset.S
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+/*******************************************************************************
+ * 
+ * Copyright (c) 1993 Intel Corporation
+ * 
+ * Intel hereby grants you permission to copy, modify, and distribute this
+ * software and its documentation.  Intel grants this permission provided
+ * that the above copyright notice appears in all copies and that both the
+ * copyright notice and this permission notice appear in supporting
+ * documentation.  In addition, Intel grants this permission provided that
+ * you prominently mark as "not part of the original" any modifications
+ * made to this software or documentation, and that the name of Intel
+ * Corporation not be used in advertising or publicity pertaining to
+ * distribution of the software or the documentation without specific,
+ * written prior permission.
+ * 
+ * Intel Corporation provides this AS IS, WITHOUT ANY WARRANTY, EXPRESS OR
+ * IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY
+ * OR FITNESS FOR A PARTICULAR PURPOSE.  Intel makes no guarantee or
+ * representations regarding the use of, or the results of the use of,
+ * the software and documentation in terms of correctness, accuracy,
+ * reliability, currentness, or otherwise; and you rely on the software,
+ * documentation and results solely at your own risk.
+ *
+ * IN NO EVENT SHALL INTEL BE LIABLE FOR ANY LOSS OF USE, LOSS OF BUSINESS,
+ * LOSS OF PROFITS, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES
+ * OF ANY KIND.  IN NO EVENT SHALL INTEL'S TOTAL LIABILITY EXCEED THE SUM
+ * PAID TO INTEL FOR THE PRODUCT LICENSED HEREUNDER.
+ * 
+ ******************************************************************************/
+
+	.file "memset.s"
+#ifdef	__PIC
+	.pic
+#endif
+#ifdef	__PID
+	.pid
+#endif
+/*
+ * (c) copyright 1989,1993 Intel Corp., all rights reserved
+ */
+
+/*
+	procedure memset  (optimized assembler version: 80960K series, 80960CA)
+
+	dest_addr = memset (dest_addr, char, len)
+
+	Fill len bytes pointed to by dest_addr with the value of char.
+        Return the original address of dest_addr.
+
+        This program avoids performing unaligned accesses.  It stores
+        from zero to seven bytes, and then stores aligned longwords,
+        and then stores from zero to seven bytes, as necessary to
+        store len bytes starting at dest_addr.
+
+	At the time of this writing, only g0 thru g7 and g13 are available 
+	for use in this leafproc;  other registers would have to be saved and
+	restored.  These nine registers, plus tricky use of g14 are sufficient
+	to implement the routine.
+*/
+
+	.globl	_memset
+	.globl	__memset
+	.leafproc	_memset, __memset
+	.align	2
+_memset:
+#ifndef __PIC
+	lda 	Lrett,g14
+#else
+	lda 	Lrett-(.+8)(ip),g14
+#endif
+__memset:
+	cmpo	7,g2		# are there fewer than seven characters to move?
+	 lda	(g14),g13	# save return address
+	notand	g0,7,g3		# test for non-aligned dest_ptr
+	 lda	0,g14		# conform to register conventions
+	shlo	24,g1,g4	# prepare word of char
+	 lda	(g0),g6		# preserve dest_ptr for return
+	shro	8,g4,g5
+	 bge.f	Lcloop_setup
+	cmpo	g3,g0		# is dest longword aligned
+	 lda	7(g3),g3	# bump dest_ptr to next longword boundary
+	or	g4,g5,g4
+	 be.t	Lwloop_setup
+
+Lbgn_cloop:
+	cmpo	g6,g3		# Have we reached longword boundary?
+	 stob	g1,(g6)		# store one byte of char
+	subo	1,g2,g2		# decrement len
+	 lda	1(g6),g6	# increment dest_ptr
+	bne.t	Lbgn_cloop	# loop if more bytes to store before longword
+
+	cmpobge.f 7,g2,Lcloop
+
+Lwloop_setup:
+	shro	16,g4,g5
+	or	g4,g5,g4
+	mov	g4,g5		# now have a longword of char
+
+Lwloop:
+	cmpo	15,g2		# Do we have to store more longwords?
+	 stl	g4,(g6)		# Store longword of char
+	subo	8,g2,g2		# Decrement len
+	 lda	8(g6),g6	# Increment dest_ptr
+	bl.t	Lwloop		# loop if more longwords to store
+
+Lcloop_setup:
+	cmpobge.t 0,g2,Lexit
+
+Lcloop:
+	cmpo	1,g2		# Is len exhausted?
+	 stob	g1,(g6)		# Store byte
+	subo	1,g2,g2		# Decrement len
+	 lda	1(g6),g6	# Increment dest_ptr
+	bne.t	Lcloop		# loop if more bytes to store
+
+Lexit:	
+	bx	(g13)
+Lrett:	
+	ret
+
+/* end of memset */