4.4BSD/usr/src/sys/tahoe/math/Kexpf.s
/*-
* Copyright (c) 1985 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Computer Consoles Inc.
*
* 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.
*
* @(#)Kexpf.s 7.1 (Berkeley) 12/6/90
*/
#include "../tahoe/SYS.h"
.text
ENTRY(Kexpf, R4|R3)
subl3 $88,fp,sp
tstl 4(fp)
jneq 1f
movl one,r0
ret
1:
lnd _maxf
cmpd 4(fp)
jleq 1f
clrl r0
ret
1:
cmpd2 4(fp),_maxf
jleq 1f
ldd _HUGE
cvdf
stf r0
ret
1:
pushl 20(fp) # hfs
ldd _log2e; pushd
ldd 4(fp); pushd
callf $24,_Kmuld
ldd r0
std 4(fp)
pushl 20(fp) # hfs
pushl 8(fp)
pushl 4(fp)
callf $16,_Kfloorf
movl r0,-88(fp) # (int)ent from Kfloorf
cvlf -88(fp)
clrl r1
stf r0
pushl 20(fp) # hfs
pushl r1
pushl r0
ldd 4(fp); pushd
callf $24,_Ksubd # (arg - ent)
pushl 20(fp) # hfs
ldd half; pushd
ldd r0; pushd
callf $24,_Ksubd
ldd r0; std -60(fp) # fract
pushl 20(fp) # hfs
pushd
pushd
callf $24,_Kmuld
ldd r0; std -84(fp) # xsq
pushl 20(fp) # hfs
pushd # xsq
ldd _p2; pushd
callf $24,_Kmuld
pushl 20(fp) # hfs
ldd _p1; pushd
ldd r0; pushd
callf $24,_Kaddd
pushl 20(fp) # hfs
ldd -84(fp); pushd
ldd r0; pushd
callf $24,_Kmuld
pushl 20(fp) # hfs
ldd _p0; pushd
ldd r0; pushd
callf $24,_Kaddd
pushl 20(fp) # hfs
ldd -60(fp); pushd # fract
ldd r0; pushd
callf $24,_Kmuld
ldd r0; std -68(fp) # temp1
pushl 20(fp) # hfs
ldd -84(fp); pushd # xsq
ldd _q2; pushd
callf $24,_Kmuld
pushl 20(fp) # hfs
ldd _q1; pushd
ldd r0; pushd
callf $24,_Kaddd
pushl 20(fp) # hfs
ldd -84(fp); pushd
ldd r0; pushd
callf $24,_Kmuld
pushl 20(fp) # hfs
ldd _q0; pushd
ldd r0; pushd
callf $24,_Kaddd
ldd r0; std -76(fp) # temp2
pushl 20(fp) # hfs for Kldexpf
pushl -88(fp) # ent
pushl 20(fp) # hfs tor temp2+temp1
ldd -68(fp); pushd # temp1
ldd -76(fp); pushd # temp2
callf $24,_Kaddd
pushl 20(fp) # hfs
ldd _sqrt2; pushd
ldd r0; pushd # temp2+temp1
callf $24,_Kmuld
ldd r0; std r2 # sqrt2*(temp2+temp1)
pushl 20(fp) # hfs
ldd -68(fp)
pushd
ldd -76(fp)
pushd
callf $24,_Ksubd # temp2-temp1
pushl 20(fp) # hfs
ldd r0
pushd # temp2-temp1
ldd r2
pushd
callf $24,_Kdivd
ldd r0
pushd
callf $20,_Kldexpf
#pushl 20(fp) # hfs
#pushl $0
#pushl r0 # cvlf r0
#pushl $0
#pushl $0
#callf $24,_Kcvtld
#ldd r0
#cvdf
#stf r0
ret
/* file : Kfloorf.x
*/
.text
.globl _Kfloorf
.data
.align 2
L19: .long 0x40800000, 0x00000000 # .double 1
.text
.set L13,0x0
.data
.text
_Kfloorf:
.word L13
subl3 $60,fp,sp
tstl 4(fp) # if (d<0.0) {
jgeq L17
lnd 4(fp)
std 4(fp) # d = -d;
pushl 12(fp) # hfs
addl3 $4,fp,-(sp) # &d
pushl 8(fp)
pushl 4(fp)
callf $20,_Kmodf
clrl -60+4(fp)
movl r0,-60(fp) # fract = modf(d,&d);
tstl r0 # if (fract != 0.0)
jeql L18
pushl 12(fp) # hfs
ldd L19
pushd
ldd 4(fp)
pushd
callf $24,_Kaddd
ldd r0
std 4(fp) # d +=1;
L18: lnd 4(fp)
std 4(fp) # d = -d;
jbr L20
L17:
pushl 12(fp) # hfs
addl3 $4,fp,-(sp)
pushl 8(fp)
pushl 4(fp)
callf $20,_Kmodf
L20: ldd 4(fp)
cvdl r0 # for Kexpf call only!
ret
.data
_p0: .long 0x45BD3D04, 0x7F734DBD # .double 1513.9067990543389
_p1: .long 0x42A19DD4, 0x989F60DA # .double 20.202065651286927
_p2: .long 0x3DBD2E42, 0xAB70BDA9 # .double .023093347753750233
_q0: .long 0x468881B1, 0x7C3A6529 # .double 4368.2116627275583
_q1: .long 0x44692F28, 0x7AE89541 # .double 233.18421142748162
_q2: .long 0x40800000, 0x00000000 # .double 1
_log2e: .long 0x40B8AA3B, 0x295C17F0 # .double 1.4426950408889634
_sqrt2: .long 0x40B504F3, 0x33F9DE64 # .double 1.414213562373095
_maxf: .long 0x471C4000, 0x00000000 # .double 10000
_HUGE: .long 0x7FFFFFFE, 0xFFFFFFFC # .double 1.701411733192644e+38
one: .long 0x40800000 # .float 1
half: .long 0x40000000, 0x00000000 # .double .5