From 7fe60435bce6595a9c58a9bfd8244d74b5320e96 Mon Sep 17 00:00:00 2001
From: Benjamin Franzke <benjaminfranzke@googlemail.com>
Date: Tue, 15 Jan 2013 08:46:13 +0100
Subject: Import DirectFB141_2k11R3_beta5

---
 Source/DirectFB/lib/direct/ppcasm_memcpy.S | 77 ++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100755 Source/DirectFB/lib/direct/ppcasm_memcpy.S

(limited to 'Source/DirectFB/lib/direct/ppcasm_memcpy.S')

diff --git a/Source/DirectFB/lib/direct/ppcasm_memcpy.S b/Source/DirectFB/lib/direct/ppcasm_memcpy.S
new file mode 100755
index 0000000..04b695b
--- /dev/null
+++ b/Source/DirectFB/lib/direct/ppcasm_memcpy.S
@@ -0,0 +1,77 @@
+/*
+ * String handling functions for PowerPC.
+ *
+ * Copyright (C) 1996 Paul Mackerras.
+ *
+ *
+ * In a mail from Paul on 23.10.2006 05:47:
+ *
+ * You may put an LGPL permission statement on that code, replacing the
+ * GPL permission statement.  From a technical point of view, I'm not
+ * sure that the code in ppcasm_memcpy_cachable.S is the best thing to
+ * use in userspace, though; for one thing, it has a cache line size
+ * assumption encoded into it.  Why don't you just use the glibc memcpy?
+ * It's pretty well optimized these days, AFAIK.
+ * 
+ * Paul.
+ *
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "ppc_asm.h"
+
+	.globl	direct_ppcasm_memcpy
+direct_ppcasm_memcpy:
+	srwi.	r7,r5,3
+	addi	r6,r3,-4
+	addi	r4,r4,-4
+	beq	2f			/* if less than 8 bytes to do */
+	andi.	r0,r6,3			/* get dest word aligned */
+	mtctr	r7
+	bne	5f
+1:	lwz	r7,4(r4)
+	lwzu	r8,8(r4)
+	stw	r7,4(r6)
+	stwu	r8,8(r6)
+	bdnz	1b
+	andi.	r5,r5,7
+2:	cmplwi	0,r5,4
+	blt	3f
+	lwzu	r0,4(r4)
+	addi	r5,r5,-4
+	stwu	r0,4(r6)
+3:	cmpwi	0,r5,0
+	beqlr
+	mtctr	r5
+	addi	r4,r4,3
+	addi	r6,r6,3
+4:	lbzu	r0,1(r4)
+	stbu	r0,1(r6)
+	bdnz	4b
+	blr
+5:	subfic	r0,r0,4
+	mtctr	r0
+6:	lbz	r7,4(r4)
+	addi	r4,r4,1
+	stb	r7,4(r6)
+	addi	r6,r6,1
+	bdnz	6b
+	subf	r5,r0,r5
+	rlwinm.	r7,r5,32-3,3,31
+	beq	2b
+	mtctr	r7
+	b	1b
-- 
cgit