1994-08-05 01:19:12 +00:00
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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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1995-01-23 01:30:24 +00:00
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* $Id: fixunsdfsi.S,v 1.2 1994/12/27 13:37:38 bde Exp $
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1994-08-05 01:19:12 +00:00
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*/
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1995-01-23 01:30:24 +00:00
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#if defined(LIBC_RCS) && !defined(lint)
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.text
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.asciz "$Id: fixunsdfsi.S,v 1.2 1994/12/27 13:37:38 bde Exp $"
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#endif /* LIBC_RCS and not lint */
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1994-08-05 01:19:12 +00:00
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#include "DEFS.h"
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ENTRY(__fixunsdfsi)
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1994-12-27 13:37:38 +00:00
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fldl 4(%esp)
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fnstcw 4(%esp)
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1994-08-05 01:19:12 +00:00
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movl 4(%esp),%eax
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1994-12-27 13:37:38 +00:00
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orb $(3 << 2),%ah # change rounding mode bitfield to 3 (chop)
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movl %eax,8(%esp)
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fldcw 8(%esp)
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subl $8,%esp
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fistpq (%esp) # convert to 64 bit integer
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popl %eax
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popl %edx # discard top 32 bits
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fldcw 4(%esp)
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1994-08-05 01:19:12 +00:00
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ret
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1994-12-27 13:37:38 +00:00
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/*
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* XXX - we are sloppy about overflow, the same as gcc-2. Values too big
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* for a 64-bit (signed) integer cause an overflow trap or are silently
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* converted to 0 if the overflow trap is masked. The remaining values
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* too big for a 32-bit (unsigned) integer are silently truncated to 32
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* bits. Negative values are converted like negative ints (no overflow)
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* if they fit in 32 bits.
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*/
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