2011-03-05 10:06:13 -04:00
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------------------------------------------------------------------------
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-- ddLogB.decTest -- integral 754r adjusted exponent, for decDoubles --
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-- Copyright (c) IBM Corporation, 2005, 2008. All rights reserved. --
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------------------------------------------------------------------------
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-- Please see the document "General Decimal Arithmetic Testcases" --
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-- at http://www2.hursley.ibm.com/decimal for the description of --
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-- these testcases. --
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-- --
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-- These testcases are experimental ('beta' versions), and they --
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-- may contain errors. They are offered on an as-is basis. In --
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-- particular, achieving the same results as the tests here is not --
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-- a guarantee that an implementation complies with any Standard --
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-- or specification. The tests are not exhaustive. --
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-- --
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-- Please send comments, suggestions, and corrections to the author: --
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-- Mike Cowlishaw, IBM Fellow --
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-- IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK --
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-- mfc@uk.ibm.com --
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------------------------------------------------------------------------
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version: 2.59
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precision: 16
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maxExponent: 384
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minExponent: -383
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extended: 1
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clamp: 1
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rounding: half_even
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-- basics
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ddlogb000 logb 0 -> -Infinity Division_by_zero
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ddlogb001 logb 1E-398 -> -398
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ddlogb002 logb 1E-383 -> -383
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ddlogb003 logb 0.001 -> -3
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ddlogb004 logb 0.03 -> -2
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ddlogb005 logb 1 -> 0
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ddlogb006 logb 2 -> 0
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ddlogb007 logb 2.5 -> 0
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ddlogb008 logb 2.500 -> 0
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ddlogb009 logb 10 -> 1
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ddlogb010 logb 70 -> 1
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ddlogb011 logb 100 -> 2
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ddlogb012 logb 333 -> 2
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ddlogb013 logb 9E+384 -> 384
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ddlogb014 logb +Infinity -> Infinity
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-- negatives appear to be treated as positives
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ddlogb021 logb -0 -> -Infinity Division_by_zero
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ddlogb022 logb -1E-398 -> -398
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ddlogb023 logb -9E-383 -> -383
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ddlogb024 logb -0.001 -> -3
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ddlogb025 logb -1 -> 0
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ddlogb026 logb -2 -> 0
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ddlogb027 logb -10 -> 1
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ddlogb028 logb -70 -> 1
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ddlogb029 logb -100 -> 2
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ddlogb030 logb -9E+384 -> 384
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ddlogb031 logb -Infinity -> Infinity
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-- zeros
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ddlogb111 logb 0 -> -Infinity Division_by_zero
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ddlogb112 logb -0 -> -Infinity Division_by_zero
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ddlogb113 logb 0E+4 -> -Infinity Division_by_zero
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ddlogb114 logb -0E+4 -> -Infinity Division_by_zero
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ddlogb115 logb 0.0000 -> -Infinity Division_by_zero
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ddlogb116 logb -0.0000 -> -Infinity Division_by_zero
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ddlogb117 logb 0E-141 -> -Infinity Division_by_zero
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ddlogb118 logb -0E-141 -> -Infinity Division_by_zero
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-- full coefficients, alternating bits
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ddlogb121 logb 268268268 -> 8
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ddlogb122 logb -268268268 -> 8
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ddlogb123 logb 134134134 -> 8
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ddlogb124 logb -134134134 -> 8
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-- Nmax, Nmin, Ntiny
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ddlogb131 logb 9.999999999999999E+384 -> 384
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ddlogb132 logb 1E-383 -> -383
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ddlogb133 logb 1.000000000000000E-383 -> -383
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ddlogb134 logb 1E-398 -> -398
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ddlogb135 logb -1E-398 -> -398
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ddlogb136 logb -1.000000000000000E-383 -> -383
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ddlogb137 logb -1E-383 -> -383
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ddlogb138 logb -9.999999999999999E+384 -> 384
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-- ones
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ddlogb0061 logb 1 -> 0
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ddlogb0062 logb 1.0 -> 0
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ddlogb0063 logb 1.000000000000000 -> 0
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-- notable cases -- exact powers of 10
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ddlogb1100 logb 1 -> 0
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ddlogb1101 logb 10 -> 1
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ddlogb1102 logb 100 -> 2
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ddlogb1103 logb 1000 -> 3
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ddlogb1104 logb 10000 -> 4
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ddlogb1105 logb 100000 -> 5
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ddlogb1106 logb 1000000 -> 6
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ddlogb1107 logb 10000000 -> 7
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ddlogb1108 logb 100000000 -> 8
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ddlogb1109 logb 1000000000 -> 9
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ddlogb1110 logb 10000000000 -> 10
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ddlogb1111 logb 100000000000 -> 11
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ddlogb1112 logb 1000000000000 -> 12
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ddlogb1113 logb 0.00000000001 -> -11
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ddlogb1114 logb 0.0000000001 -> -10
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ddlogb1115 logb 0.000000001 -> -9
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ddlogb1116 logb 0.00000001 -> -8
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ddlogb1117 logb 0.0000001 -> -7
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ddlogb1118 logb 0.000001 -> -6
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ddlogb1119 logb 0.00001 -> -5
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ddlogb1120 logb 0.0001 -> -4
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ddlogb1121 logb 0.001 -> -3
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ddlogb1122 logb 0.01 -> -2
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ddlogb1123 logb 0.1 -> -1
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ddlogb1124 logb 1E-99 -> -99
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ddlogb1125 logb 1E-100 -> -100
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ddlogb1127 logb 1E-299 -> -299
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ddlogb1126 logb 1E-383 -> -383
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-- suggestions from Ilan Nehama
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ddlogb1400 logb 10E-3 -> -2
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ddlogb1401 logb 10E-2 -> -1
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ddlogb1402 logb 100E-2 -> 0
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ddlogb1403 logb 1000E-2 -> 1
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ddlogb1404 logb 10000E-2 -> 2
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ddlogb1405 logb 10E-1 -> 0
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ddlogb1406 logb 100E-1 -> 1
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ddlogb1407 logb 1000E-1 -> 2
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ddlogb1408 logb 10000E-1 -> 3
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ddlogb1409 logb 10E0 -> 1
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ddlogb1410 logb 100E0 -> 2
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ddlogb1411 logb 1000E0 -> 3
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ddlogb1412 logb 10000E0 -> 4
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ddlogb1413 logb 10E1 -> 2
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ddlogb1414 logb 100E1 -> 3
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ddlogb1415 logb 1000E1 -> 4
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ddlogb1416 logb 10000E1 -> 5
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ddlogb1417 logb 10E2 -> 3
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ddlogb1418 logb 100E2 -> 4
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ddlogb1419 logb 1000E2 -> 5
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ddlogb1420 logb 10000E2 -> 6
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-- special values
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ddlogb820 logb Infinity -> Infinity
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ddlogb821 logb 0 -> -Infinity Division_by_zero
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ddlogb822 logb NaN -> NaN
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ddlogb823 logb sNaN -> NaN Invalid_operation
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-- propagating NaNs
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ddlogb824 logb sNaN123 -> NaN123 Invalid_operation
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ddlogb825 logb -sNaN321 -> -NaN321 Invalid_operation
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ddlogb826 logb NaN456 -> NaN456
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ddlogb827 logb -NaN654 -> -NaN654
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ddlogb828 logb NaN1 -> NaN1
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-- Null test
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ddlogb900 logb # -> NaN Invalid_operation
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