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 (a] uk.ibm.com -- 19 ------------------------------------------------------------------------ 20 version: 2.59 21 22 precision: 16 23 maxExponent: 384 24 minExponent: -383 25 extended: 1 26 clamp: 1 27 rounding: half_even 28 29 -- basics 30 ddlogb000 logb 0 -> -Infinity Division_by_zero 31 ddlogb001 logb 1E-398 -> -398 32 ddlogb002 logb 1E-383 -> -383 33 ddlogb003 logb 0.001 -> -3 34 ddlogb004 logb 0.03 -> -2 35 ddlogb005 logb 1 -> 0 36 ddlogb006 logb 2 -> 0 37 ddlogb007 logb 2.5 -> 0 38 ddlogb008 logb 2.500 -> 0 39 ddlogb009 logb 10 -> 1 40 ddlogb010 logb 70 -> 1 41 ddlogb011 logb 100 -> 2 42 ddlogb012 logb 333 -> 2 43 ddlogb013 logb 9E+384 -> 384 44 ddlogb014 logb +Infinity -> Infinity 45 46 -- negatives appear to be treated as positives 47 ddlogb021 logb -0 -> -Infinity Division_by_zero 48 ddlogb022 logb -1E-398 -> -398 49 ddlogb023 logb -9E-383 -> -383 50 ddlogb024 logb -0.001 -> -3 51 ddlogb025 logb -1 -> 0 52 ddlogb026 logb -2 -> 0 53 ddlogb027 logb -10 -> 1 54 ddlogb028 logb -70 -> 1 55 ddlogb029 logb -100 -> 2 56 ddlogb030 logb -9E+384 -> 384 57 ddlogb031 logb -Infinity -> Infinity 58 59 -- zeros 60 ddlogb111 logb 0 -> -Infinity Division_by_zero 61 ddlogb112 logb -0 -> -Infinity Division_by_zero 62 ddlogb113 logb 0E+4 -> -Infinity Division_by_zero 63 ddlogb114 logb -0E+4 -> -Infinity Division_by_zero 64 ddlogb115 logb 0.0000 -> -Infinity Division_by_zero 65 ddlogb116 logb -0.0000 -> -Infinity Division_by_zero 66 ddlogb117 logb 0E-141 -> -Infinity Division_by_zero 67 ddlogb118 logb -0E-141 -> -Infinity Division_by_zero 68 69 -- full coefficients, alternating bits 70 ddlogb121 logb 268268268 -> 8 71 ddlogb122 logb -268268268 -> 8 72 ddlogb123 logb 134134134 -> 8 73 ddlogb124 logb -134134134 -> 8 74 75 -- Nmax, Nmin, Ntiny 76 ddlogb131 logb 9.999999999999999E+384 -> 384 77 ddlogb132 logb 1E-383 -> -383 78 ddlogb133 logb 1.000000000000000E-383 -> -383 79 ddlogb134 logb 1E-398 -> -398 80 81 ddlogb135 logb -1E-398 -> -398 82 ddlogb136 logb -1.000000000000000E-383 -> -383 83 ddlogb137 logb -1E-383 -> -383 84 ddlogb138 logb -9.999999999999999E+384 -> 384 85 86 -- ones 87 ddlogb0061 logb 1 -> 0 88 ddlogb0062 logb 1.0 -> 0 89 ddlogb0063 logb 1.000000000000000 -> 0 90 91 -- notable cases -- exact powers of 10 92 ddlogb1100 logb 1 -> 0 93 ddlogb1101 logb 10 -> 1 94 ddlogb1102 logb 100 -> 2 95 ddlogb1103 logb 1000 -> 3 96 ddlogb1104 logb 10000 -> 4 97 ddlogb1105 logb 100000 -> 5 98 ddlogb1106 logb 1000000 -> 6 99 ddlogb1107 logb 10000000 -> 7 100 ddlogb1108 logb 100000000 -> 8 101 ddlogb1109 logb 1000000000 -> 9 102 ddlogb1110 logb 10000000000 -> 10 103 ddlogb1111 logb 100000000000 -> 11 104 ddlogb1112 logb 1000000000000 -> 12 105 ddlogb1113 logb 0.00000000001 -> -11 106 ddlogb1114 logb 0.0000000001 -> -10 107 ddlogb1115 logb 0.000000001 -> -9 108 ddlogb1116 logb 0.00000001 -> -8 109 ddlogb1117 logb 0.0000001 -> -7 110 ddlogb1118 logb 0.000001 -> -6 111 ddlogb1119 logb 0.00001 -> -5 112 ddlogb1120 logb 0.0001 -> -4 113 ddlogb1121 logb 0.001 -> -3 114 ddlogb1122 logb 0.01 -> -2 115 ddlogb1123 logb 0.1 -> -1 116 ddlogb1124 logb 1E-99 -> -99 117 ddlogb1125 logb 1E-100 -> -100 118 ddlogb1127 logb 1E-299 -> -299 119 ddlogb1126 logb 1E-383 -> -383 120 121 -- suggestions from Ilan Nehama 122 ddlogb1400 logb 10E-3 -> -2 123 ddlogb1401 logb 10E-2 -> -1 124 ddlogb1402 logb 100E-2 -> 0 125 ddlogb1403 logb 1000E-2 -> 1 126 ddlogb1404 logb 10000E-2 -> 2 127 ddlogb1405 logb 10E-1 -> 0 128 ddlogb1406 logb 100E-1 -> 1 129 ddlogb1407 logb 1000E-1 -> 2 130 ddlogb1408 logb 10000E-1 -> 3 131 ddlogb1409 logb 10E0 -> 1 132 ddlogb1410 logb 100E0 -> 2 133 ddlogb1411 logb 1000E0 -> 3 134 ddlogb1412 logb 10000E0 -> 4 135 ddlogb1413 logb 10E1 -> 2 136 ddlogb1414 logb 100E1 -> 3 137 ddlogb1415 logb 1000E1 -> 4 138 ddlogb1416 logb 10000E1 -> 5 139 ddlogb1417 logb 10E2 -> 3 140 ddlogb1418 logb 100E2 -> 4 141 ddlogb1419 logb 1000E2 -> 5 142 ddlogb1420 logb 10000E2 -> 6 143 144 -- special values 145 ddlogb820 logb Infinity -> Infinity 146 ddlogb821 logb 0 -> -Infinity Division_by_zero 147 ddlogb822 logb NaN -> NaN 148 ddlogb823 logb sNaN -> NaN Invalid_operation 149 -- propagating NaNs 150 ddlogb824 logb sNaN123 -> NaN123 Invalid_operation 151 ddlogb825 logb -sNaN321 -> -NaN321 Invalid_operation 152 ddlogb826 logb NaN456 -> NaN456 153 ddlogb827 logb -NaN654 -> -NaN654 154 ddlogb828 logb NaN1 -> NaN1 155 156 -- Null test 157 ddlogb900 logb # -> NaN Invalid_operation 158 159 160
