From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 arch/m68k/lib/modsi3.S | 108 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 arch/m68k/lib/modsi3.S

(limited to 'arch/m68k/lib/modsi3.S')

diff --git a/arch/m68k/lib/modsi3.S b/arch/m68k/lib/modsi3.S
new file mode 100644
index 000000000..1d9e0efdf
--- /dev/null
+++ b/arch/m68k/lib/modsi3.S
@@ -0,0 +1,108 @@
+/* libgcc1 routines for 68000 w/o floating-point hardware.
+   Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file with other programs, and to distribute
+those programs without any restriction coming from the use of this
+file.  (The General Public License restrictions do apply in other
+respects; for example, they cover modification of the file, and
+distribution when not linked into another program.)
+
+This file 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
+General Public License for more details. */
+
+/* As a special exception, if you link this library with files
+   compiled with GCC to produce an executable, this does not cause
+   the resulting executable to be covered by the GNU General Public License.
+   This exception does not however invalidate any other reasons why
+   the executable file might be covered by the GNU General Public License.  */
+
+/* Use this one for any 680x0; assumes no floating point hardware.
+   The trailing " '" appearing on some lines is for ANSI preprocessors.  Yuk.
+   Some of this code comes from MINIX, via the folks at ericsson.
+   D. V. Henkel-Wallace (gumby@cygnus.com) Fete Bastille, 1992
+*/
+
+/* These are predefined by new versions of GNU cpp.  */
+
+#ifndef __USER_LABEL_PREFIX__
+#define __USER_LABEL_PREFIX__ _
+#endif
+
+#ifndef __REGISTER_PREFIX__
+#define __REGISTER_PREFIX__
+#endif
+
+#ifndef __IMMEDIATE_PREFIX__
+#define __IMMEDIATE_PREFIX__ #
+#endif
+
+/* ANSI concatenation macros.  */
+
+#define CONCAT1(a, b) CONCAT2(a, b)
+#define CONCAT2(a, b) a ## b
+
+/* Use the right prefix for global labels.  */
+
+#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
+
+/* Use the right prefix for registers.  */
+
+#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
+
+/* Use the right prefix for immediate values.  */
+
+#define IMM(x) CONCAT1 (__IMMEDIATE_PREFIX__, x)
+
+#define d0 REG (d0)
+#define d1 REG (d1)
+#define d2 REG (d2)
+#define d3 REG (d3)
+#define d4 REG (d4)
+#define d5 REG (d5)
+#define d6 REG (d6)
+#define d7 REG (d7)
+#define a0 REG (a0)
+#define a1 REG (a1)
+#define a2 REG (a2)
+#define a3 REG (a3)
+#define a4 REG (a4)
+#define a5 REG (a5)
+#define a6 REG (a6)
+#define fp REG (fp)
+#define sp REG (sp)
+
+	.text
+	.proc
+	.globl	SYM (__modsi3)
+SYM (__modsi3):
+	movel	sp@(8), d1	/* d1 = divisor */
+	movel	sp@(4), d0	/* d0 = dividend */
+	movel	d1, sp@-
+	movel	d0, sp@-
+	jbsr	SYM (__divsi3)
+	addql	IMM (8), sp
+	movel	sp@(8), d1	/* d1 = divisor */
+#if !(defined(__mcf5200__) || defined(__mcoldfire__))
+	movel	d1, sp@-
+	movel	d0, sp@-
+	jbsr	SYM (__mulsi3)	/* d0 = (a/b)*b */
+	addql	IMM (8), sp
+#else
+	mulsl	d1,d0
+#endif
+	movel	sp@(4), d1	/* d1 = dividend */
+	subl	d0, d1		/* d1 = a - (a/b)*b */
+	movel	d1, d0
+	rts
+
-- 
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