diff options
Diffstat (limited to 'src/regress/lib/libc/cephes/epow.c')
| -rw-r--r-- | src/regress/lib/libc/cephes/epow.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/src/regress/lib/libc/cephes/epow.c b/src/regress/lib/libc/cephes/epow.c deleted file mode 100644 index 646268fce7..0000000000 --- a/src/regress/lib/libc/cephes/epow.c +++ /dev/null | |||
| @@ -1,187 +0,0 @@ | |||
| 1 | /* $OpenBSD: epow.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 | /* epow.c */ | ||
| 20 | /* power function: z = x**y */ | ||
| 21 | /* by Stephen L. Moshier. */ | ||
| 22 | |||
| 23 | |||
| 24 | #include "ehead.h" | ||
| 25 | |||
| 26 | extern int rndprc; | ||
| 27 | void epowi(); | ||
| 28 | |||
| 29 | void epow( x, y, z ) | ||
| 30 | unsigned short *x, *y, *z; | ||
| 31 | { | ||
| 32 | unsigned short w[NE]; | ||
| 33 | int rndsav; | ||
| 34 | long li; | ||
| 35 | |||
| 36 | efloor( y, w ); | ||
| 37 | if( ecmp(y,w) == 0 ) | ||
| 38 | { | ||
| 39 | eifrac( y, &li, w ); | ||
| 40 | if( li < 0 ) | ||
| 41 | li = -li; | ||
| 42 | if( (li < 0x7fffffff) && (li != 0x80000000) ) | ||
| 43 | { | ||
| 44 | epowi( x, y, z ); | ||
| 45 | return; | ||
| 46 | } | ||
| 47 | } | ||
| 48 | /* z = exp( y * log(x) ) */ | ||
| 49 | rndsav = rndprc; | ||
| 50 | rndprc = NBITS; | ||
| 51 | elog( x, w ); | ||
| 52 | emul( y, w, w ); | ||
| 53 | eexp( w, z ); | ||
| 54 | rndprc = rndsav; | ||
| 55 | emul( eone, z, z ); | ||
| 56 | } | ||
| 57 | |||
| 58 | |||
| 59 | /* y is integer valued. */ | ||
| 60 | |||
| 61 | void epowi( x, y, z ) | ||
| 62 | unsigned short x[], y[], z[]; | ||
| 63 | { | ||
| 64 | unsigned short w[NE]; | ||
| 65 | long li, lx; | ||
| 66 | unsigned long lu; | ||
| 67 | int rndsav; | ||
| 68 | unsigned short signx; | ||
| 69 | /* unsigned short signy; */ | ||
| 70 | |||
| 71 | rndsav = rndprc; | ||
| 72 | eifrac( y, &li, w ); | ||
| 73 | if( li < 0 ) | ||
| 74 | lx = -li; | ||
| 75 | else | ||
| 76 | lx = li; | ||
| 77 | |||
| 78 | if( (lx == 0x7fffffff) || (lx == 0x80000000) ) | ||
| 79 | { | ||
| 80 | epow( x, y, z ); | ||
| 81 | goto done; | ||
| 82 | } | ||
| 83 | |||
| 84 | if( (x[NE-1] & (unsigned short )0x7fff) == 0 ) | ||
| 85 | { | ||
| 86 | if( li == 0 ) | ||
| 87 | { | ||
| 88 | emov( eone, z ); | ||
| 89 | return; | ||
| 90 | } | ||
| 91 | else if( li < 0 ) | ||
| 92 | { | ||
| 93 | einfin( z ); | ||
| 94 | return; | ||
| 95 | } | ||
| 96 | else | ||
| 97 | { | ||
| 98 | eclear( z ); | ||
| 99 | return; | ||
| 100 | } | ||
| 101 | } | ||
| 102 | |||
| 103 | if( li == 0L ) | ||
| 104 | { | ||
| 105 | emov( eone, z ); | ||
| 106 | return; | ||
| 107 | } | ||
| 108 | |||
| 109 | emov( x, w ); | ||
| 110 | signx = w[NE-1] & (unsigned short )0x8000; | ||
| 111 | w[NE-1] &= (unsigned short )0x7fff; | ||
| 112 | |||
| 113 | /* Overflow detection */ | ||
| 114 | /* | ||
| 115 | lx = li * (w[NE-1] - 0x3fff); | ||
| 116 | if( lx > 16385L ) | ||
| 117 | { | ||
| 118 | einfin( z ); | ||
| 119 | mtherr( "epowi", OVERFLOW ); | ||
| 120 | goto done; | ||
| 121 | } | ||
| 122 | if( lx < -16450L ) | ||
| 123 | { | ||
| 124 | eclear( z ); | ||
| 125 | return; | ||
| 126 | } | ||
| 127 | */ | ||
| 128 | rndprc = NBITS; | ||
| 129 | |||
| 130 | if( li < 0 ) | ||
| 131 | { | ||
| 132 | lu = (unsigned int )( -li ); | ||
| 133 | /* signy = 0xffff;*/ | ||
| 134 | ediv( w, eone, w ); | ||
| 135 | } | ||
| 136 | else | ||
| 137 | { | ||
| 138 | lu = (unsigned int )li; | ||
| 139 | /* signy = 0;*/ | ||
| 140 | } | ||
| 141 | |||
| 142 | /* First bit of the power */ | ||
| 143 | if( lu & 1 ) | ||
| 144 | { | ||
| 145 | emov( w, z ); | ||
| 146 | } | ||
| 147 | else | ||
| 148 | { | ||
| 149 | emov( eone, z ); | ||
| 150 | signx = 0; | ||
| 151 | } | ||
| 152 | |||
| 153 | |||
| 154 | lu >>= 1; | ||
| 155 | while( lu != 0L ) | ||
| 156 | { | ||
| 157 | emul( w, w, w ); /* arg to the 2-to-the-kth power */ | ||
| 158 | if( lu & 1L ) /* if that bit is set, then include in product */ | ||
| 159 | emul( w, z, z ); | ||
| 160 | lu >>= 1; | ||
| 161 | } | ||
| 162 | |||
| 163 | |||
| 164 | done: | ||
| 165 | |||
| 166 | if( signx ) | ||
| 167 | eneg( z ); /* odd power of negative number */ | ||
| 168 | |||
| 169 | /* | ||
| 170 | if( signy ) | ||
| 171 | { | ||
| 172 | if( ecmp( z, ezero ) != 0 ) | ||
| 173 | { | ||
| 174 | ediv( z, eone, z ); | ||
| 175 | } | ||
| 176 | else | ||
| 177 | { | ||
| 178 | einfin( z ); | ||
| 179 | printf( "epowi OVERFLOW\n" ); | ||
| 180 | } | ||
| 181 | } | ||
| 182 | */ | ||
| 183 | rndprc = rndsav; | ||
| 184 | emul( eone, z, z ); | ||
| 185 | } | ||
| 186 | |||
| 187 | |||
