| ------------------------------------------------------------------------ |
| -- ddLogB.decTest -- integral 754r adjusted exponent, for decDoubles -- |
| -- Copyright (c) IBM Corporation, 2005, 2008. All rights reserved. -- |
| ------------------------------------------------------------------------ |
| -- Please see the document "General Decimal Arithmetic Testcases" -- |
| -- at http://www2.hursley.ibm.com/decimal for the description of -- |
| -- these testcases. -- |
| -- -- |
| -- These testcases are experimental ('beta' versions), and they -- |
| -- may contain errors. They are offered on an as-is basis. In -- |
| -- particular, achieving the same results as the tests here is not -- |
| -- a guarantee that an implementation complies with any Standard -- |
| -- or specification. The tests are not exhaustive. -- |
| -- -- |
| -- Please send comments, suggestions, and corrections to the author: -- |
| -- Mike Cowlishaw, IBM Fellow -- |
| -- IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK -- |
| -- mfc@uk.ibm.com -- |
| ------------------------------------------------------------------------ |
| version: 2.59 |
| |
| precision: 16 |
| maxExponent: 384 |
| minExponent: -383 |
| extended: 1 |
| clamp: 1 |
| rounding: half_even |
| |
| -- basics |
| ddlogb000 logb 0 -> -Infinity Division_by_zero |
| ddlogb001 logb 1E-398 -> -398 |
| ddlogb002 logb 1E-383 -> -383 |
| ddlogb003 logb 0.001 -> -3 |
| ddlogb004 logb 0.03 -> -2 |
| ddlogb005 logb 1 -> 0 |
| ddlogb006 logb 2 -> 0 |
| ddlogb007 logb 2.5 -> 0 |
| ddlogb008 logb 2.500 -> 0 |
| ddlogb009 logb 10 -> 1 |
| ddlogb010 logb 70 -> 1 |
| ddlogb011 logb 100 -> 2 |
| ddlogb012 logb 333 -> 2 |
| ddlogb013 logb 9E+384 -> 384 |
| ddlogb014 logb +Infinity -> Infinity |
| |
| -- negatives appear to be treated as positives |
| ddlogb021 logb -0 -> -Infinity Division_by_zero |
| ddlogb022 logb -1E-398 -> -398 |
| ddlogb023 logb -9E-383 -> -383 |
| ddlogb024 logb -0.001 -> -3 |
| ddlogb025 logb -1 -> 0 |
| ddlogb026 logb -2 -> 0 |
| ddlogb027 logb -10 -> 1 |
| ddlogb028 logb -70 -> 1 |
| ddlogb029 logb -100 -> 2 |
| ddlogb030 logb -9E+384 -> 384 |
| ddlogb031 logb -Infinity -> Infinity |
| |
| -- zeros |
| ddlogb111 logb 0 -> -Infinity Division_by_zero |
| ddlogb112 logb -0 -> -Infinity Division_by_zero |
| ddlogb113 logb 0E+4 -> -Infinity Division_by_zero |
| ddlogb114 logb -0E+4 -> -Infinity Division_by_zero |
| ddlogb115 logb 0.0000 -> -Infinity Division_by_zero |
| ddlogb116 logb -0.0000 -> -Infinity Division_by_zero |
| ddlogb117 logb 0E-141 -> -Infinity Division_by_zero |
| ddlogb118 logb -0E-141 -> -Infinity Division_by_zero |
| |
| -- full coefficients, alternating bits |
| ddlogb121 logb 268268268 -> 8 |
| ddlogb122 logb -268268268 -> 8 |
| ddlogb123 logb 134134134 -> 8 |
| ddlogb124 logb -134134134 -> 8 |
| |
| -- Nmax, Nmin, Ntiny |
| ddlogb131 logb 9.999999999999999E+384 -> 384 |
| ddlogb132 logb 1E-383 -> -383 |
| ddlogb133 logb 1.000000000000000E-383 -> -383 |
| ddlogb134 logb 1E-398 -> -398 |
| |
| ddlogb135 logb -1E-398 -> -398 |
| ddlogb136 logb -1.000000000000000E-383 -> -383 |
| ddlogb137 logb -1E-383 -> -383 |
| ddlogb138 logb -9.999999999999999E+384 -> 384 |
| |
| -- ones |
| ddlogb0061 logb 1 -> 0 |
| ddlogb0062 logb 1.0 -> 0 |
| ddlogb0063 logb 1.000000000000000 -> 0 |
| |
| -- notable cases -- exact powers of 10 |
| ddlogb1100 logb 1 -> 0 |
| ddlogb1101 logb 10 -> 1 |
| ddlogb1102 logb 100 -> 2 |
| ddlogb1103 logb 1000 -> 3 |
| ddlogb1104 logb 10000 -> 4 |
| ddlogb1105 logb 100000 -> 5 |
| ddlogb1106 logb 1000000 -> 6 |
| ddlogb1107 logb 10000000 -> 7 |
| ddlogb1108 logb 100000000 -> 8 |
| ddlogb1109 logb 1000000000 -> 9 |
| ddlogb1110 logb 10000000000 -> 10 |
| ddlogb1111 logb 100000000000 -> 11 |
| ddlogb1112 logb 1000000000000 -> 12 |
| ddlogb1113 logb 0.00000000001 -> -11 |
| ddlogb1114 logb 0.0000000001 -> -10 |
| ddlogb1115 logb 0.000000001 -> -9 |
| ddlogb1116 logb 0.00000001 -> -8 |
| ddlogb1117 logb 0.0000001 -> -7 |
| ddlogb1118 logb 0.000001 -> -6 |
| ddlogb1119 logb 0.00001 -> -5 |
| ddlogb1120 logb 0.0001 -> -4 |
| ddlogb1121 logb 0.001 -> -3 |
| ddlogb1122 logb 0.01 -> -2 |
| ddlogb1123 logb 0.1 -> -1 |
| ddlogb1124 logb 1E-99 -> -99 |
| ddlogb1125 logb 1E-100 -> -100 |
| ddlogb1127 logb 1E-299 -> -299 |
| ddlogb1126 logb 1E-383 -> -383 |
| |
| -- suggestions from Ilan Nehama |
| ddlogb1400 logb 10E-3 -> -2 |
| ddlogb1401 logb 10E-2 -> -1 |
| ddlogb1402 logb 100E-2 -> 0 |
| ddlogb1403 logb 1000E-2 -> 1 |
| ddlogb1404 logb 10000E-2 -> 2 |
| ddlogb1405 logb 10E-1 -> 0 |
| ddlogb1406 logb 100E-1 -> 1 |
| ddlogb1407 logb 1000E-1 -> 2 |
| ddlogb1408 logb 10000E-1 -> 3 |
| ddlogb1409 logb 10E0 -> 1 |
| ddlogb1410 logb 100E0 -> 2 |
| ddlogb1411 logb 1000E0 -> 3 |
| ddlogb1412 logb 10000E0 -> 4 |
| ddlogb1413 logb 10E1 -> 2 |
| ddlogb1414 logb 100E1 -> 3 |
| ddlogb1415 logb 1000E1 -> 4 |
| ddlogb1416 logb 10000E1 -> 5 |
| ddlogb1417 logb 10E2 -> 3 |
| ddlogb1418 logb 100E2 -> 4 |
| ddlogb1419 logb 1000E2 -> 5 |
| ddlogb1420 logb 10000E2 -> 6 |
| |
| -- special values |
| ddlogb820 logb Infinity -> Infinity |
| ddlogb821 logb 0 -> -Infinity Division_by_zero |
| ddlogb822 logb NaN -> NaN |
| ddlogb823 logb sNaN -> NaN Invalid_operation |
| -- propagating NaNs |
| ddlogb824 logb sNaN123 -> NaN123 Invalid_operation |
| ddlogb825 logb -sNaN321 -> -NaN321 Invalid_operation |
| ddlogb826 logb NaN456 -> NaN456 |
| ddlogb827 logb -NaN654 -> -NaN654 |
| ddlogb828 logb NaN1 -> NaN1 |
| |
| -- Null test |
| ddlogb900 logb # -> NaN Invalid_operation |
| |
| |
