80 lines
2.7 KiB
ArmAsm
80 lines
2.7 KiB
ArmAsm
/* $NetBSD: fixunsdfsi.S,v 1.10 1999/02/22 13:07:14 christos Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)fixunsdfsi.s 5.1 12/17/90
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*/
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#include <machine/asm.h>
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#if defined(LIBC_SCCS)
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RCSID("$NetBSD: fixunsdfsi.S,v 1.10 1999/02/22 13:07:14 christos Exp $")
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#endif
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ENTRY(__fixunsdfsi)
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fldl 4(%esp) /* argument double to accum stack */
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frndint /* create integer */
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#ifdef PIC
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PIC_PROLOGUE
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leal PIC_GOTOFF(fbiggestsigned),%eax
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PIC_EPILOGUE
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fcoml (%eax)
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#else
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fcoml fbiggestsigned /* bigger than biggest signed? */
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#endif
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fstsw %ax
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sahf
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jnb 2f
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fistpl 4(%esp)
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movl 4(%esp),%eax
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ret
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2:
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#ifdef PIC
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PIC_PROLOGUE
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leal PIC_GOTOFF(fbiggestsigned),%eax
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PIC_EPILOGUE
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fsubl (%eax)
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#else
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fsubl fbiggestsigned /* reduce for proper conversion */
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#endif
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fistpl 4(%esp) /* convert */
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movl 4(%esp),%eax
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orl $0x80000000,%eax /* restore bias */
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ret
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fbiggestsigned: .double 0r2147483648.0
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