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      1 /*	$NetBSD: fixunsdfsi.S,v 1.14 2014/05/23 02:34:19 uebayasi Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * William Jolitz.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	from: @(#)fixunsdfsi.s	5.1	12/17/90
     35  */
     36 
     37 #include <machine/asm.h>
     38 #if defined(LIBC_SCCS)
     39 	RCSID("$NetBSD: fixunsdfsi.S,v 1.14 2014/05/23 02:34:19 uebayasi Exp $")
     40 #endif
     41 
     42 ENTRY(__fixunsdfsi)
     43 	fldl	4(%esp)		/* argument double to accum stack */
     44 	frndint			/* create integer */
     45 #ifdef __PIC__
     46 	PIC_PROLOGUE
     47 	leal	PIC_GOTOFF(fbiggestsigned),%eax
     48 	PIC_EPILOGUE
     49 	fcoml	(%eax)
     50 #else
     51 	fcoml	fbiggestsigned	/* bigger than biggest signed? */
     52 #endif
     53 	fstsw	%ax
     54 	sahf
     55 	jnb	2f
     56 
     57 	fistpl	4(%esp)
     58 	movl	4(%esp),%eax
     59 	ret
     60 
     61 2:
     62 #ifdef __PIC__
     63 	PIC_PROLOGUE
     64 	leal	PIC_GOTOFF(fbiggestsigned),%eax
     65 	PIC_EPILOGUE
     66 	fsubl	(%eax)
     67 #else
     68 	fsubl	fbiggestsigned	/* reduce for proper conversion */
     69 #endif
     70 	fistpl	4(%esp)		/* convert */
     71 	movl	4(%esp),%eax
     72 	orl	$0x80000000,%eax	/* restore bias */
     73 	ret
     74 END(__fixunsdfsi)
     75 
     76 fbiggestsigned:	.double	2147483648.0
     77