Everyone, say hello to a real floating point emulator!

The fpemul written for Linux by W. Metzenthen: ported to NetBSD and
then to FreeBSD, and now back to OpenBSD.

1 files changed, 83 insertions, 0 deletions

diff --git a/sys/gnu/arch/i386/fpemul/fpu_asm.h b/sys/gnu/arch/i386/fpemul/fpu_asm.h
new file mode 100644
index 00000000000..bec05b1e587
--- /dev/null
+++ b/sys/gnu/arch/i386/fpemul/fpu_asm.h
@@ -0,0 +1,83 @@
+/*	$OpenBSD: fpu_asm.h,v 1.1 1996/08/27 10:32:45 downsj Exp $	*/
+/*
+ *  fpu_asm.h
+ *
+ *
+ * Copyright (C) 1992,1993,1994
+ *                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,
+ *                       Australia.  E-mail   billm@vaxc.cc.monash.edu.au
+ * All rights reserved.
+ *
+ * This copyright notice covers the redistribution and use of the
+ * FPU emulator developed by W. Metzenthen. It covers only its use
+ * in the 386BSD, FreeBSD and NetBSD operating systems. Any other
+ * use is not permitted under this copyright.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must include information specifying
+ *    that source code for the emulator is freely available and include
+ *    either:
+ *      a) an offer to provide the source code for a nominal distribution
+ *         fee, or
+ *      b) list at least two alternative methods whereby the source
+ *         can be obtained, e.g. a publically accessible bulletin board
+ *         and an anonymous ftp site from which the software can be
+ *         downloaded.
+ * 3. All advertising materials specifically mentioning features or use of
+ *    this emulator must acknowledge that it was developed by W. Metzenthen.
+ * 4. The name of W. Metzenthen may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
+ * W. METZENTHEN BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * The purpose of this copyright, based upon the Berkeley copyright, is to
+ * ensure that the covered software remains freely available to everyone.
+ *
+ * The software (with necessary differences) is also available, but under
+ * the terms of the GNU copyleft, for the Linux operating system and for
+ * the djgpp ms-dos extender.
+ *
+ * W. Metzenthen   June 1994.
+ *
+ *
+ *    $FreeBSD: fpu_asm.h,v 1.3 1994/06/10 07:44:16 rich Exp $
+ *
+ */
+
+#ifndef _FPU_ASM_H_
+#define _FPU_ASM_H_
+
+#include <gnu/arch/i386/fpemul/fpu_emu.h>
+
+#define	EXCEPTION	_exception
+
+
+#define PARAM1	8(%ebp)
+#define	PARAM2	12(%ebp)
+#define	PARAM3	16(%ebp)
+#define	PARAM4	20(%ebp)
+
+#define SIGL_OFFSET 8
+#define SIGN(x)	(x)
+#define	TAG(x)	1(x)
+#define	EXP(x)	4(x)
+#define SIG(x)	SIGL_OFFSET/**/(x)
+#define	SIGL(x)	SIGL_OFFSET/**/(x)
+#define	SIGH(x)	12(x)
+
+#endif				/* _FPU_ASM_H_ */