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- /*-
- * 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.
- *
- * @(#)Katanf.s 7.1 (Berkeley) 12/6/90
- */
-
- #include "../tahoe/SYS.h"
-
- .text
- ENTRY(Katanf, 0)
- tstl 4(fp) # if (arg > 0)
- jleq 1f
- pushl 20(fp) # hfs
- pushl 8(fp)
- pushl 4(fp)
- callf $16,satan
- ret # return(satan(arg));
- 1: # else
- pushl 20(fp) # hfs
- lnd 4(fp)
- pushd
- callf $16,satan
- lnf r0
- stf r0
- ret # return(-satan(-arg));
-
- ASENTRY(satan, R2|R3)
- subl3 $60,fp,sp
- cmpd2 4(fp),_sq2m1 # if (arg < sq2m1)
- jgeq 1f
- pushl 12(fp) # hfs
- pushl 8(fp)
- pushl 4(fp)
- callf $16,xatan
- ret # return(xatan(arg));
- 1:
- cmpd2 4(fp),_sq2p1 # else if (arg > sq2p1)
- jgtr 9f
- pushl 12(fp) # hfs
- ldd one; pushd
- ldd 4(fp); pushd
- callf $24,_Kaddd # (arg+1.0)
- pushl 12(fp) # hfs of _Kdivd
- pushl r1
- pushl r0
- pushl 12(fp) # hfs
- ldd one; pushd
- ldd 4(fp); pushd
- callf $24,_Ksubd # (arg-1.0)
- pushl r1
- pushl r0
- callf $24,_Kdivd # (arg-1.0)/(arg+1.0)
- pushl 12(fp) # hfs
- pushl r1
- pushl r0
- callf $16,xatan # xatan((ag-1.0)/(arg+1.0))
- pushl 12(fp) # hfs
- pushl r1
- pushl r0
- ldd _pio4; pushd
- callf $24,_Kaddd
- ldd r0; cvdf; stf r0
- ret # return(pio4+xatan((xatan(...)));
-
- 9:
- pushl 12(fp)
- ldd 4(fp); pushd
- ldd one; pushd
- callf $24,_Kdivd # (1.0/arg)
- pushl 12(fp) # hfs
- ldd r0; pushd
- callf $16,xatan
- # clrl -60+4(fp)
- # movl r0,-60(fp)
- pushl 12(fp) # hfs
- ldd r0; pushd
- ldd _pio2; pushd
- callf $24,_Ksubd
- ldd r0; cvdf; stf r0
- ret
-
- ASENTRY(xatan, 0)
- subl3 $68,fp,sp
- pushl 12(fp) # hfs
- ldd 4(fp); pushd; pushd
- callf $24,_Kmuld # argsq = arg*arg;
- ldd r0
- std -60(fp) # argsq
- pushl 12(fp) # hfs
- pushd
- ldd _p5; pushd
- callf $24,_Kmuld # p5*argsq
- pushl 12(fp) # hfs
- ldd _p4; pushd
- ldd r0; pushd
- callf $24,_Kaddd # (p5*argsq+p4)
- pushl 12(fp) # hfs
- ldd -60(fp); pushd
- ldd r0; pushd
- callf $24,_Kmuld # (p5*argsq+p4)*argsq
- pushl 12(fp) # hfs
- ldd _p3; pushd
- ldd r0; pushd
- callf $24,_Kaddd # ((p5*argsq+p4)*argsq+p3)
- pushl 12(fp) # hfs
- ldd -60(fp); pushd
- ldd r0; pushd
- callf $24,_Kmuld # (..)*argsq
- pushl 12(fp) # hfs
- ldd _p2; pushd
- ldd r0; pushd
- callf $24,_Kaddd # (..)*argsq+p2)
- pushl 12(fp) # hfs
- ldd -60(fp); pushd
- ldd r0; pushd
- callf $24,_Kmuld # ((..)*argsq+p2)*argsq
- pushl 12(fp) # hfs
- ldd _p1; pushd
- ldd r0; pushd
- callf $24,_Kaddd # ((..)*argsq+p2)*argsq+p1)
- pushl 12(fp) # hfs
- ldd -60(fp); pushd
- ldd r0; pushd
- callf $24,_Kmuld # (..)*argsq
- pushl 12(fp) # hfs
- ldd _p0; pushd
- ldd r0; pushd
- callf $24,_Kaddd # ((..)*argsq+p1)*argsq+p0)
- pushl 12(fp) # hfs
- ldd 4(fp); pushd
- ldd r0; pushd
- callf $24,_Kmuld # (..)*arg
- ldd r0
- std -68(fp); cvdf; stf r0 # value
- ret
-
- .data
- .align 2
- _sq2p1: .long 0x411A8279, 0x99FCEF31 # .double 2.414213562373095
- _sq2m1: .long 0x3FD413CC, 0xCFE77990 # .double .41421356237309503
- _pio2: .long 0x40C90FDA, 0xA22168C1 # .double 1.5707963267948966
- _pio4: .long 0x40490FDA, 0xA22168C1 # .double .78539816339744829
- _p0: .long 0x407FFFFF, 0xFD687A4B # .double .99999999939652999
- _p1: .long 0xBFAAAAA2, 0x09F9DBF2 # .double -.3333330762079
- _p2: .long 0x3F4CC820, 0x0670059B # .double .199982166665
- _p3: .long 0xBF11D182, 0x6601878B # .double -.142400777317
- _p4: .long 0x3ED88B47, 0x4EFC9AF9 # .double .10573440275
- _p5: .long 0xBE772E4B, 0x0E689AEB # .double -.060346883
- one: .long 0x40800000, 0x00000000 # .double 1
-