Copied from mc68881/s_ceil.S,v

lib/libm/arch/m68k/s_ceil.S

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+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * the Systems Programming Group of the University of Utah Computer
+ * Science Department.
+ *
+ * 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 reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
+ */
+
+#include <machine/asm.h>
+
+;_sccsid:
+;.asciz	"from: @(#)floor.s	5.1 (Berkeley) 5/17/90"
+
+RCSID("$NetBSD: s_ceil.S,v 1.5 1999/08/21 21:26:16 is Exp $")
+
+| ceil(x)
+| -floor(-x), for all real x
+ENTRY(ceil)
+	fmovel	fpcr,d0		| save old FPCR
+	fmoved	sp@(4),fp0	| get argument
+	fbun	Lret		| if NaN, return NaN
+	fbolt	Lrtz		| <0, round to zero
+	fmovel	#0x30,fpcr	| >=0, round to inf
+	jra	Ldoit
+Lrtz:
+	fmovel	#0x10,fpcr
+Ldoit:
+	fintd	sp@(4),fp0	| truncate
+	fmovel	d0,fpcr		| restore old FPCR
+Lret:
+#ifndef __SVR4_ABI__
+	fmoved	fp0,sp@-
+	movel	sp@+,d0
+	movel	sp@+,d1
+#endif
+	rts