From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001
From: Reinhard Tartler <siretart@tauware.de>
Date: Mon, 10 Oct 2011 17:43:39 +0200
Subject: Imported nx-X11-3.1.0-1.tar.gz

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository
---
 .../Xserver/hw/xfree86/os-support/misc/BUSmemcpy.S | 153 +++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 nx-X11/programs/Xserver/hw/xfree86/os-support/misc/BUSmemcpy.S

(limited to 'nx-X11/programs/Xserver/hw/xfree86/os-support/misc/BUSmemcpy.S')

diff --git a/nx-X11/programs/Xserver/hw/xfree86/os-support/misc/BUSmemcpy.S b/nx-X11/programs/Xserver/hw/xfree86/os-support/misc/BUSmemcpy.S
new file mode 100644
index 000000000..373723c7d
--- /dev/null
+++ b/nx-X11/programs/Xserver/hw/xfree86/os-support/misc/BUSmemcpy.S
@@ -0,0 +1,153 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/misc/BUSmemcpy.s,v 1.2 1998/07/25 16:56:49 dawes Exp $ */
+/******************************************************************************
+                        Copyright 1993 by Glenn G. Lai
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of Glenn G. Lai not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+Glenn G. Lai DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+Glenn G. Lai
+P.O. Box 4314
+Austin, Tx 78765
+(glenn@cs.utexas.edu)
+8/9/93
+******************************************************************************/
+/* $XConsortium: BUSmemcpy.s /main/4 1996/02/21 17:39:34 kaleb $ */
+
+/*
+ * Modified to use long-alignment of video memory rather than word-alignment
+ * to improve performance for LocalBus video cards.  Function names changed
+ * from ISAToMem and MemToISA to BusToMem and MemToBus.
+ *
+ * David Dawes <dawes@XFree86.org>, 25 August 1993.
+ */
+
+
+#include "assyntax.h"
+
+	FILE("BUSmemcpy.s")
+
+	AS_BEGIN
+
+/* BusToMem copies from video memory to main memory
+   MemToBus copies from main memory to video memory
+
+	void xf86BusToMem(unsigned char *dst, unsigned char *src, int len);
+	void xf86MemToBus(unsigned char *dst, unsigned char *src, int len);
+*/
+
+#define dst     REGOFF(4,ESP)
+#define src     REGOFF(8,ESP)
+#define len     REGOFF(12,ESP)
+
+	GLOBL	GLNAME(xf86BusToMem)
+	GLOBL	GLNAME(xf86MemToBus)
+
+	SEG_DATA
+copyright:
+	STRING("Copyright 8/9/1993 by Glenn G. Lai")
+
+	SEG_TEXT
+	ALIGNTEXT4
+GLNAME(xf86BusToMem):
+	CLD
+	PUSH_L	(ESI)
+	MOV_L	(EDI, EDX)
+	
+	MOV_L	(src, ESI)
+	MOV_L	(dst, EDI)
+	MOV_L	(len, ECX)
+	
+	CMP_L	(CONST(7), ECX)
+	JC	(quickBM)
+
+	TEST_L	(CONST(1), ESI)
+	JZ	(BwM)
+
+	MOVS_B
+	DEC_L	(ECX)
+
+BwM:	
+	TEST_L	(CONST(2), ESI)
+	JZ	(BlM)
+
+	MOVS_W
+	DEC_L	(ECX)
+	DEC_L	(ECX)
+
+BlM:
+	MOV_L	(ECX, EAX)
+	AND_L	(CONST(3), EAX)
+	SHR_L	(CONST(2), ECX)
+	REP
+	MOVS_L
+	MOV_L	(EAX, ECX)
+quickBM:
+	OR_L	(ECX, ECX)
+	JZ	(return)
+	REP
+	MOVS_B
+return:
+	POP_L	(ESI)
+	MOV_L	(EDX, EDI)
+	RET
+/************************/
+
+	ALIGNTEXT4
+GLNAME(xf86MemToBus):
+	CLD
+	PUSH_L	(ESI)
+	MOV_L	(EDI, EDX)
+	
+	MOV_L	(src, ESI)
+	MOV_L	(dst, EDI)
+	MOV_L	(len, ECX)
+	
+	CMP_L	(CONST(7), ECX)
+	JC	(quickMB)
+
+	TEST_L	(CONST(1), EDI)
+	JZ	(MwB)
+
+	MOVS_B
+	DEC_L	(ECX)
+
+MwB:	
+	TEST_L	(CONST(2), EDI)
+	JZ	(MlB)
+
+	MOVS_W
+	DEC_L	(ECX)
+	DEC_L	(ECX)
+
+MlB:
+	MOV_L	(ECX, EAX)
+	AND_L	(CONST(3), EAX)
+	SHR_L	(CONST(2), ECX)
+	REP
+	MOVS_L
+	MOV_L	(EAX, ECX)
+quickMB:
+	OR_L	(ECX, ECX)
+	JZ	(return)
+	REP
+	MOVS_B
+
+	POP_L	(ESI)
+	MOV_L	(EDX, EDI)
+	RET
+
-- 
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