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/* $OpenBSD: fixunsdfsi.S,v 1.1 2001/08/29 01:45:24 art Exp $ */
/* $NetBSD: fixunsdfsi.S,v 1.3 2000/07/25 04:26:12 mycroft Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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>
#define _LOCORE
#include <machine/frame.h>
/*
* Convert double to unsigned integer (for gcc).
*
* I have made the output for NaN agree with the Sun compiler, not
* that it really matters, by using `fbul,a'.
*/
.align 8
Lbig:
.word 0x43e00000 ! .double 2^63
.word 0 ! (who me, not trust the assembler?)
/*
* Same as above but to unsigned long
*/
ENTRY(__dtoul)
sub %sp, 16, %sp
std %f2, [%sp + 64 + BIAS + 8]
#ifdef PIC
PICCY_SET(Lbig, %g1, %o0)
ldd [%g1], %f2
#else
sethi %hi(Lbig), %g1
ldd [%g1 + %lo(Lbig)], %f2
#endif
fcmped %f0, %f2 ! d < 2^63, or NaN, or -Inf?
nop ! (fpop2 delay)
fbul,a 1f ! if so, use fdtoi to convert to int
fdtox %f0, %f0 ! (this includes negatives!)
! d does not fit in an int, so subtract 2^63, convert,
! and add 2^63 again (sigh). Just hope the intermediate
! fits (if not, the result is undefined anyway).
fsubd %f0, %f2, %f0 ! d -= 2^63
fdtox %f0, %f0 ! convert to int
std %f0, [%sp + 64 + BIAS] ! move into return reg
ldx [%sp + 64 + BIAS], %o0
sethi %hi(0x80000000), %o1
sllx %o1, 32, %o1
add %o0, %o1, %o0 ! add 2^63
ldd [%sp + 64 + BIAS + 8], %f2
retl
add %sp, 16, %sp
1:
std %f0, [%sp + 64 + BIAS] ! return result
ldx [%sp + 64 + BIAS], %o0
ldd [%sp + 64 + BIAS + 8], %f2
retl
add %sp, 16, %sp
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