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2 | # Copyright (c) 1989, 1993 |
3 | # The Regents of the University of California. All rights reserved. | |
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4 | # |
5 | # This code is derived from software contributed to Berkeley by | |
6 | # Ozan Yigit. | |
7 | # | |
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8 | # Redistribution and use in source and binary forms, with or without |
9 | # modification, are permitted provided that the following conditions | |
10 | # are met: | |
11 | # 1. Redistributions of source code must retain the above copyright | |
12 | # notice, this list of conditions and the following disclaimer. | |
13 | # 2. Redistributions in binary form must reproduce the above copyright | |
14 | # notice, this list of conditions and the following disclaimer in the | |
15 | # documentation and/or other materials provided with the distribution. | |
16 | # 3. All advertising materials mentioning features or use of this software | |
17 | # must display the following acknowledgement: | |
18 | # This product includes software developed by the University of | |
19 | # California, Berkeley and its contributors. | |
20 | # 4. Neither the name of the University nor the names of its contributors | |
21 | # may be used to endorse or promote products derived from this software | |
22 | # without specific prior written permission. | |
23 | # | |
24 | # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | # ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | # SUCH DAMAGE. | |
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35 | # |
36 | # @(#)sqroot.m4 8.1 (Berkeley) 6/6/93 | |
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37 | # |
38 | ||
39 | define(square_root, | |
40 | `ifelse(eval($1<0),1,negative-square-root, | |
41 | `square_root_aux($1, 1, eval(($1+1)/2))')') | |
42 | define(square_root_aux, | |
43 | `ifelse($3, $2, $3, | |
44 | $3, eval($1/$2), $3, | |
45 | `square_root_aux($1, $3, eval(($3+($1/$3))/2))')') |