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/Lib/test/decimaltestdata/ddLogB.decTest

http://unladen-swallow.googlecode.com/
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  1------------------------------------------------------------------------
  2-- ddLogB.decTest -- integral 754r adjusted exponent, for decDoubles  --
  3-- Copyright (c) IBM Corporation, 2005, 2008.  All rights reserved.   --
  4------------------------------------------------------------------------
  5-- Please see the document "General Decimal Arithmetic Testcases"     --
  6-- at http://www2.hursley.ibm.com/decimal for the description of      --
  7-- these testcases.                                                   --
  8--                                                                    --
  9-- These testcases are experimental ('beta' versions), and they       --
 10-- may contain errors.  They are offered on an as-is basis.  In       --
 11-- particular, achieving the same results as the tests here is not    --
 12-- a guarantee that an implementation complies with any Standard      --
 13-- or specification.  The tests are not exhaustive.                   --
 14--                                                                    --
 15-- Please send comments, suggestions, and corrections to the author:  --
 16--   Mike Cowlishaw, IBM Fellow                                       --
 17--   IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK         --
 18--   mfc@uk.ibm.com                                                   --
 19------------------------------------------------------------------------
 20version: 2.58
 21
 22precision:   16
 23maxExponent: 384
 24minExponent: -383
 25extended:    1
 26clamp:       1
 27rounding:    half_even
 28
 29-- basics
 30ddlogb000 logb  0                 -> -Infinity  Division_by_zero
 31ddlogb001 logb  1E-398            -> -398
 32ddlogb002 logb  1E-383            -> -383
 33ddlogb003 logb  0.001             -> -3
 34ddlogb004 logb  0.03              -> -2
 35ddlogb005 logb  1                 ->  0
 36ddlogb006 logb  2                 ->  0
 37ddlogb007 logb  2.5               ->  0
 38ddlogb008 logb  2.500             ->  0
 39ddlogb009 logb  10                ->  1
 40ddlogb010 logb  70                ->  1
 41ddlogb011 logb  100               ->  2
 42ddlogb012 logb  333               ->  2
 43ddlogb013 logb  9E+384            ->  384
 44ddlogb014 logb +Infinity          ->  Infinity
 45
 46-- negatives appear to be treated as positives
 47ddlogb021 logb -0                 -> -Infinity  Division_by_zero
 48ddlogb022 logb -1E-398            -> -398
 49ddlogb023 logb -9E-383            -> -383
 50ddlogb024 logb -0.001             -> -3
 51ddlogb025 logb -1                 ->  0
 52ddlogb026 logb -2                 ->  0
 53ddlogb027 logb -10                ->  1
 54ddlogb028 logb -70                ->  1
 55ddlogb029 logb -100               ->  2
 56ddlogb030 logb -9E+384            ->  384
 57ddlogb031 logb -Infinity          ->  Infinity
 58
 59-- zeros
 60ddlogb111 logb          0   -> -Infinity  Division_by_zero
 61ddlogb112 logb         -0   -> -Infinity  Division_by_zero
 62ddlogb113 logb       0E+4   -> -Infinity  Division_by_zero
 63ddlogb114 logb      -0E+4   -> -Infinity  Division_by_zero
 64ddlogb115 logb     0.0000   -> -Infinity  Division_by_zero
 65ddlogb116 logb    -0.0000   -> -Infinity  Division_by_zero
 66ddlogb117 logb      0E-141  -> -Infinity  Division_by_zero
 67ddlogb118 logb     -0E-141  -> -Infinity  Division_by_zero
 68
 69-- full coefficients, alternating bits
 70ddlogb121 logb   268268268        -> 8
 71ddlogb122 logb  -268268268        -> 8
 72ddlogb123 logb   134134134        -> 8
 73ddlogb124 logb  -134134134        -> 8
 74
 75-- Nmax, Nmin, Ntiny
 76ddlogb131 logb  9.999999999999999E+384   ->  384
 77ddlogb132 logb  1E-383                   -> -383
 78ddlogb133 logb  1.000000000000000E-383   -> -383
 79ddlogb134 logb  1E-398                   -> -398
 80
 81ddlogb135 logb  -1E-398                  -> -398
 82ddlogb136 logb  -1.000000000000000E-383  -> -383
 83ddlogb137 logb  -1E-383                  -> -383
 84ddlogb138 logb  -9.999999999999999E+384  ->  384
 85
 86-- ones
 87ddlogb0061 logb  1                 ->   0
 88ddlogb0062 logb  1.0               ->   0
 89ddlogb0063 logb  1.000000000000000 ->   0
 90
 91-- notable cases -- exact powers of 10
 92ddlogb1100 logb 1             -> 0
 93ddlogb1101 logb 10            -> 1
 94ddlogb1102 logb 100           -> 2
 95ddlogb1103 logb 1000          -> 3
 96ddlogb1104 logb 10000         -> 4
 97ddlogb1105 logb 100000        -> 5
 98ddlogb1106 logb 1000000       -> 6
 99ddlogb1107 logb 10000000      -> 7
100ddlogb1108 logb 100000000     -> 8
101ddlogb1109 logb 1000000000    -> 9
102ddlogb1110 logb 10000000000   -> 10
103ddlogb1111 logb 100000000000  -> 11
104ddlogb1112 logb 1000000000000 -> 12
105ddlogb1113 logb 0.00000000001 -> -11
106ddlogb1114 logb 0.0000000001 -> -10
107ddlogb1115 logb 0.000000001 -> -9
108ddlogb1116 logb 0.00000001 -> -8
109ddlogb1117 logb 0.0000001 -> -7
110ddlogb1118 logb 0.000001 -> -6
111ddlogb1119 logb 0.00001 -> -5
112ddlogb1120 logb 0.0001 -> -4
113ddlogb1121 logb 0.001 -> -3
114ddlogb1122 logb 0.01 -> -2
115ddlogb1123 logb 0.1 -> -1
116ddlogb1124 logb 1E-99  -> -99
117ddlogb1125 logb 1E-100 -> -100
118ddlogb1127 logb 1E-299 -> -299
119ddlogb1126 logb 1E-383 -> -383
120
121-- suggestions from Ilan Nehama
122ddlogb1400 logb 10E-3    -> -2
123ddlogb1401 logb 10E-2    -> -1
124ddlogb1402 logb 100E-2   ->  0
125ddlogb1403 logb 1000E-2  ->  1
126ddlogb1404 logb 10000E-2 ->  2
127ddlogb1405 logb 10E-1    ->  0
128ddlogb1406 logb 100E-1   ->  1
129ddlogb1407 logb 1000E-1  ->  2
130ddlogb1408 logb 10000E-1 ->  3
131ddlogb1409 logb 10E0     ->  1
132ddlogb1410 logb 100E0    ->  2
133ddlogb1411 logb 1000E0   ->  3
134ddlogb1412 logb 10000E0  ->  4
135ddlogb1413 logb 10E1     ->  2
136ddlogb1414 logb 100E1    ->  3
137ddlogb1415 logb 1000E1   ->  4
138ddlogb1416 logb 10000E1  ->  5
139ddlogb1417 logb 10E2     ->  3
140ddlogb1418 logb 100E2    ->  4
141ddlogb1419 logb 1000E2   ->  5
142ddlogb1420 logb 10000E2  ->  6
143
144-- special values
145ddlogb820  logb   Infinity ->   Infinity
146ddlogb821  logb   0        ->  -Infinity Division_by_zero
147ddlogb822  logb   NaN      ->   NaN
148ddlogb823  logb   sNaN     ->   NaN     Invalid_operation
149-- propagating NaNs
150ddlogb824  logb   sNaN123  ->   NaN123  Invalid_operation
151ddlogb825  logb   -sNaN321 ->  -NaN321  Invalid_operation
152ddlogb826  logb   NaN456   ->   NaN456
153ddlogb827  logb   -NaN654  ->  -NaN654
154ddlogb828  logb   NaN1     ->   NaN1
155
156-- Null test
157ddlogb900  logb #   -> NaN Invalid_operation
158
159