94 lines
3.2 KiB
ArmAsm
94 lines
3.2 KiB
ArmAsm
/*
|
|
* 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.
|
|
* 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.
|
|
*
|
|
* from: Header: fixunsdfsi.s,v 1.3 91/10/08 00:03:15 torek Exp
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
.asciz "@(#)fixunsdfsi.s 8.1 (Berkeley) 6/4/93"
|
|
#if 0
|
|
RCSID("$NetBSD: fixunsdfsi.S,v 1.3 2000/07/25 04:26:12 mycroft Exp $")
|
|
#endif
|
|
#endif /* LIBC_SCCS and not lint */
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* 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)
|
|
PIC_PROLOGUE(%o4, %o5)
|
|
sub %sp, 16, %sp
|
|
std %f2, [%sp + CCFSZ + SPOFF + 8]
|
|
SET(.Lbig, %o5, %o3)
|
|
ldd [%o3], %f2
|
|
fcmped %f0, %f2 ! d < 2^63, or NaN, or -Inf?
|
|
fbul,a 1f ! if so, use fdtox to convert to long
|
|
fdtox %f0, %f0 ! (this includes negatives!)
|
|
|
|
! d does not fit in a long, 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 long
|
|
std %f0, [%sp + CCFSZ + SPOFF] ! move into return reg
|
|
ldx [%sp + CCFSZ + SPOFF], %o0
|
|
sethi %hi(0x80000000), %o1
|
|
sllx %o1, 32, %o1
|
|
add %o0, %o1, %o0 ! add 2^63
|
|
ldd [%sp + CCFSZ + SPOFF + 8], %f2
|
|
retl
|
|
add %sp, 16, %sp
|
|
|
|
1:
|
|
std %f0, [%sp + CCFSZ + SPOFF] ! return result
|
|
ldx [%sp + CCFSZ + SPOFF], %o0
|
|
ldd [%sp + CCFSZ + SPOFF + 8], %f2
|
|
retl
|
|
add %sp, 16, %sp
|
|
END(__dtoul)
|