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/Lib/test/decimaltestdata/logb.decTest

http://unladen-swallow.googlecode.com/
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  1------------------------------------------------------------------------
  2-- logb.decTest -- return integral adjusted exponent as per 754r      --
  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
 22-- This emphasises the testing of notable cases, as they will often
 23-- have unusual paths (especially the 10**n results).
 24
 25extended:    1
 26rounding:    half_even
 27maxExponent: 999
 28minexponent: -999
 29
 30-- basics & examples
 31precision:   9
 32logbx001 logb  0                 -> -Infinity  Division_by_zero
 33logbx002 logb  1E-999            -> -999
 34logbx003 logb  9E-999            -> -999
 35logbx004 logb  0.001             -> -3
 36logbx005 logb  0.03              -> -2
 37logbx006 logb  1                 ->  0
 38logbx007 logb  2                 ->  0
 39logbx008 logb  2.5               ->  0
 40logbx009 logb  2.50              ->  0
 41logbx010 logb  10                ->  1
 42logbx011 logb  70                ->  1
 43logbx012 logb  100               ->  2
 44logbx013 logb  250               ->  2
 45logbx014 logb +Infinity          ->  Infinity
 46
 47-- negatives are treated as positives
 48logbx021 logb -0                 -> -Infinity  Division_by_zero
 49logbx022 logb -1E-999            -> -999
 50logbx023 logb -9E-999            -> -999
 51logbx024 logb -0.001             -> -3
 52logbx025 logb -1                 ->  0
 53logbx026 logb -2                 ->  0
 54logbx027 logb -10                ->  1
 55logbx028 logb -70                ->  1
 56logbx029 logb -100               ->  2
 57logbx030 logb -100000000         ->  8
 58logbx031 logb -Infinity          ->  Infinity
 59
 60-- zeros
 61logbx111 logb          0   -> -Infinity  Division_by_zero
 62logbx112 logb         -0   -> -Infinity  Division_by_zero
 63logbx113 logb       0E+4   -> -Infinity  Division_by_zero
 64logbx114 logb      -0E+4   -> -Infinity  Division_by_zero
 65logbx115 logb     0.0000   -> -Infinity  Division_by_zero
 66logbx116 logb    -0.0000   -> -Infinity  Division_by_zero
 67logbx117 logb      0E-141  -> -Infinity  Division_by_zero
 68logbx118 logb     -0E-141  -> -Infinity  Division_by_zero
 69
 70-- full coefficients, alternating bits
 71logbx121 logb   268268268        -> 8
 72logbx122 logb  -268268268        -> 8
 73logbx123 logb   134134134        -> 8
 74logbx124 logb  -134134134        -> 8
 75
 76-- Nmax, Nmin, Ntiny
 77logbx131 logb  9.99999999E+999   -> 999
 78logbx132 logb  1E-999            -> -999
 79logbx133 logb  1.00000000E-999   -> -999
 80logbx134 logb  1E-1007           -> -1007
 81
 82logbx135 logb  -1E-1007          -> -1007
 83logbx136 logb  -1.00000000E-999  -> -999
 84logbx137 logb  -1E-999           -> -999
 85logbx138 logb  -9.99999999E+999  ->  999
 86
 87-- ones
 88logbx0061 logb  1                 ->   0
 89logbx0062 logb  1.0               ->   0
 90logbx0063 logb  1.000000000000000 ->   0
 91logbx0064 logb  1.000000000000000000 ->   0
 92
 93-- notable cases -- exact powers of 10
 94logbx1100 logb 1             -> 0
 95logbx1101 logb 10            -> 1
 96logbx1102 logb 100           -> 2
 97logbx1103 logb 1000          -> 3
 98logbx1104 logb 10000         -> 4
 99logbx1105 logb 100000        -> 5
100logbx1106 logb 1000000       -> 6
101logbx1107 logb 10000000      -> 7
102logbx1108 logb 100000000     -> 8
103logbx1109 logb 1000000000    -> 9
104logbx1110 logb 10000000000   -> 10
105logbx1111 logb 100000000000  -> 11
106logbx1112 logb 1000000000000 -> 12
107logbx1113 logb 0.00000000001 -> -11
108logbx1114 logb 0.0000000001 -> -10
109logbx1115 logb 0.000000001 -> -9
110logbx1116 logb 0.00000001 -> -8
111logbx1117 logb 0.0000001 -> -7
112logbx1118 logb 0.000001 -> -6
113logbx1119 logb 0.00001 -> -5
114logbx1120 logb 0.0001 -> -4
115logbx1121 logb 0.001 -> -3
116logbx1122 logb 0.01 -> -2
117logbx1123 logb 0.1 -> -1
118logbx1124 logb 1E-99  -> -99
119logbx1125 logb 1E-100 -> -100
120logbx1126 logb 1E-383 -> -383
121logbx1127 logb 1E-999 -> -999
122
123-- suggestions from Ilan Nehama
124logbx1400 logb 10E-3    -> -2
125logbx1401 logb 10E-2    -> -1
126logbx1402 logb 100E-2   ->  0
127logbx1403 logb 1000E-2  ->  1
128logbx1404 logb 10000E-2 ->  2
129logbx1405 logb 10E-1    ->  0
130logbx1406 logb 100E-1   ->  1
131logbx1407 logb 1000E-1  ->  2
132logbx1408 logb 10000E-1 ->  3
133logbx1409 logb 10E0     ->  1
134logbx1410 logb 100E0    ->  2
135logbx1411 logb 1000E0   ->  3
136logbx1412 logb 10000E0  ->  4
137logbx1413 logb 10E1     ->  2
138logbx1414 logb 100E1    ->  3
139logbx1415 logb 1000E1   ->  4
140logbx1416 logb 10000E1  ->  5
141logbx1417 logb 10E2     ->  3
142logbx1418 logb 100E2    ->  4
143logbx1419 logb 1000E2   ->  5
144logbx1420 logb 10000E2  ->  6
145
146-- special values
147logbx820  logb   Infinity ->   Infinity
148logbx821  logb  -Infinity ->   Infinity
149logbx822  logb   0        ->  -Infinity Division_by_zero
150logbx823  logb   NaN      ->   NaN
151logbx824  logb   sNaN     ->   NaN     Invalid_operation
152-- propagating NaNs
153logbx825  logb   sNaN123  ->   NaN123  Invalid_operation
154logbx826  logb   -sNaN321 ->  -NaN321  Invalid_operation
155logbx827  logb   NaN456   ->   NaN456
156logbx828  logb   -NaN654  ->  -NaN654
157logbx829  logb   NaN1     ->   NaN1
158
159-- Null test
160logbx900  logb #   -> NaN Invalid_operation
161
162