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author | cvs2svn <admin@example.com> | 2012-07-13 17:49:56 +0000 |
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committer | cvs2svn <admin@example.com> | 2012-07-13 17:49:56 +0000 |
commit | 6f82d0e8f9756938f04071892206a5af85e676f0 (patch) | |
tree | 821921a1dd0a5a3cece91121e121cc63c4b68128 /src/regress/lib/libc/cephes/etodec.c | |
parent | 9204e59073bcf27e1487ec4ac46e981902ddd904 (diff) | |
download | openbsd-eric_g2k12.tar.gz openbsd-eric_g2k12.tar.bz2 openbsd-eric_g2k12.zip |
This commit was manufactured by cvs2git to create tag 'eric_g2k12'.eric_g2k12
Diffstat (limited to 'src/regress/lib/libc/cephes/etodec.c')
-rw-r--r-- | src/regress/lib/libc/cephes/etodec.c | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/src/regress/lib/libc/cephes/etodec.c b/src/regress/lib/libc/cephes/etodec.c deleted file mode 100644 index a15845efb6..0000000000 --- a/src/regress/lib/libc/cephes/etodec.c +++ /dev/null | |||
@@ -1,199 +0,0 @@ | |||
1 | /* $OpenBSD: etodec.c,v 1.1 2011/07/02 18:11:01 martynas Exp $ */ | ||
2 | |||
3 | /* | ||
4 | * Copyright (c) 2008 Stephen L. Moshier <steve@moshier.net> | ||
5 | * | ||
6 | * Permission to use, copy, modify, and distribute this software for any | ||
7 | * purpose with or without fee is hereby granted, provided that the above | ||
8 | * copyright notice and this permission notice appear in all copies. | ||
9 | * | ||
10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | ||
13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | ||
15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | ||
16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
17 | */ | ||
18 | |||
19 | #include "ehead.h" | ||
20 | void emovi(), emovo(), ecleaz(), eshdn8(), emdnorm(); | ||
21 | void todec(); | ||
22 | /* | ||
23 | ; convert DEC double precision to e type | ||
24 | ; double d; | ||
25 | ; short e[NE]; | ||
26 | ; dectoe( &d, e ); | ||
27 | */ | ||
28 | void dectoe( d, e ) | ||
29 | unsigned short *d; | ||
30 | unsigned short *e; | ||
31 | { | ||
32 | unsigned short y[NI]; | ||
33 | register unsigned short r, *p; | ||
34 | |||
35 | ecleaz(y); /* start with a zero */ | ||
36 | p = y; /* point to our number */ | ||
37 | r = *d; /* get DEC exponent word */ | ||
38 | if( *d & (unsigned int )0x8000 ) | ||
39 | *p = 0xffff; /* fill in our sign */ | ||
40 | ++p; /* bump pointer to our exponent word */ | ||
41 | r &= 0x7fff; /* strip the sign bit */ | ||
42 | if( r == 0 ) /* answer = 0 if high order DEC word = 0 */ | ||
43 | goto done; | ||
44 | |||
45 | |||
46 | r >>= 7; /* shift exponent word down 7 bits */ | ||
47 | r += EXONE - 0201; /* subtract DEC exponent offset */ | ||
48 | /* add our e type exponent offset */ | ||
49 | *p++ = r; /* to form our exponent */ | ||
50 | |||
51 | r = *d++; /* now do the high order mantissa */ | ||
52 | r &= 0177; /* strip off the DEC exponent and sign bits */ | ||
53 | r |= 0200; /* the DEC understood high order mantissa bit */ | ||
54 | *p++ = r; /* put result in our high guard word */ | ||
55 | |||
56 | *p++ = *d++; /* fill in the rest of our mantissa */ | ||
57 | *p++ = *d++; | ||
58 | *p = *d; | ||
59 | |||
60 | eshdn8(y); /* shift our mantissa down 8 bits */ | ||
61 | done: | ||
62 | emovo( y, e ); | ||
63 | } | ||
64 | |||
65 | |||
66 | |||
67 | /* | ||
68 | ; convert e type to DEC double precision | ||
69 | ; double d; | ||
70 | ; short e[NE]; | ||
71 | ; etodec( e, &d ); | ||
72 | */ | ||
73 | #if 0 | ||
74 | static unsigned short decbit[NI] = {0,0,0,0,0,0,0200,0}; | ||
75 | void etodec( x, d ) | ||
76 | unsigned short *x, *d; | ||
77 | { | ||
78 | unsigned short xi[NI]; | ||
79 | register unsigned short r; | ||
80 | int i, j; | ||
81 | |||
82 | emovi( x, xi ); | ||
83 | *d = 0; | ||
84 | if( xi[0] != 0 ) | ||
85 | *d = 0100000; | ||
86 | r = xi[E]; | ||
87 | if( r < (EXONE - 128) ) | ||
88 | goto zout; | ||
89 | i = xi[M+4]; | ||
90 | if( (i & 0200) != 0 ) | ||
91 | { | ||
92 | if( (i & 0377) == 0200 ) | ||
93 | { | ||
94 | if( (i & 0400) != 0 ) | ||
95 | { | ||
96 | /* check all less significant bits */ | ||
97 | for( j=M+5; j<NI; j++ ) | ||
98 | { | ||
99 | if( xi[j] != 0 ) | ||
100 | goto yesrnd; | ||
101 | } | ||
102 | } | ||
103 | goto nornd; | ||
104 | } | ||
105 | yesrnd: | ||
106 | eaddm( decbit, xi ); | ||
107 | r -= enormlz(xi); | ||
108 | } | ||
109 | |||
110 | nornd: | ||
111 | |||
112 | r -= EXONE; | ||
113 | r += 0201; | ||
114 | if( r < 0 ) | ||
115 | { | ||
116 | zout: | ||
117 | *d++ = 0; | ||
118 | *d++ = 0; | ||
119 | *d++ = 0; | ||
120 | *d++ = 0; | ||
121 | return; | ||
122 | } | ||
123 | if( r >= 0377 ) | ||
124 | { | ||
125 | *d++ = 077777; | ||
126 | *d++ = -1; | ||
127 | *d++ = -1; | ||
128 | *d++ = -1; | ||
129 | return; | ||
130 | } | ||
131 | r &= 0377; | ||
132 | r <<= 7; | ||
133 | eshup8( xi ); | ||
134 | xi[M] &= 0177; | ||
135 | r |= xi[M]; | ||
136 | *d++ |= r; | ||
137 | *d++ = xi[M+1]; | ||
138 | *d++ = xi[M+2]; | ||
139 | *d++ = xi[M+3]; | ||
140 | } | ||
141 | #else | ||
142 | |||
143 | extern int rndprc; | ||
144 | |||
145 | void etodec( x, d ) | ||
146 | unsigned short *x, *d; | ||
147 | { | ||
148 | unsigned short xi[NI]; | ||
149 | long exp; | ||
150 | int rndsav; | ||
151 | |||
152 | emovi( x, xi ); | ||
153 | exp = (long )xi[E] - (EXONE - 0201); /* adjust exponent for offsets */ | ||
154 | /* round off to nearest or even */ | ||
155 | rndsav = rndprc; | ||
156 | rndprc = 56; | ||
157 | emdnorm( xi, 0, 0, exp, 64 ); | ||
158 | rndprc = rndsav; | ||
159 | todec( xi, d ); | ||
160 | } | ||
161 | |||
162 | void todec( x, y ) | ||
163 | unsigned short *x, *y; | ||
164 | { | ||
165 | unsigned short i; | ||
166 | unsigned short *p; | ||
167 | |||
168 | p = x; | ||
169 | *y = 0; | ||
170 | if( *p++ ) | ||
171 | *y = 0100000; | ||
172 | i = *p++; | ||
173 | if( i == 0 ) | ||
174 | { | ||
175 | *y++ = 0; | ||
176 | *y++ = 0; | ||
177 | *y++ = 0; | ||
178 | *y++ = 0; | ||
179 | return; | ||
180 | } | ||
181 | if( i > 0377 ) | ||
182 | { | ||
183 | *y++ |= 077777; | ||
184 | *y++ = 0xffff; | ||
185 | *y++ = 0xffff; | ||
186 | *y++ = 0xffff; | ||
187 | return; | ||
188 | } | ||
189 | i &= 0377; | ||
190 | i <<= 7; | ||
191 | eshup8( x ); | ||
192 | x[M] &= 0177; | ||
193 | i |= x[M]; | ||
194 | *y++ |= i; | ||
195 | *y++ = x[M+1]; | ||
196 | *y++ = x[M+2]; | ||
197 | *y++ = x[M+3]; | ||
198 | } | ||
199 | #endif | ||