mirror of https://github.com/python/cpython
127 lines
6.7 KiB
Plaintext
127 lines
6.7 KiB
Plaintext
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------------------------------------------------------------------------
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-- ddNextMinus.decTest -- decDouble next that is less [754r nextdown] --
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-- Copyright (c) IBM Corporation, 1981, 2007. 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: 2.56
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-- All operands and results are decDoubles.
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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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ddnextm001 nextminus 0.9999999999999995 -> 0.9999999999999994
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ddnextm002 nextminus 0.9999999999999996 -> 0.9999999999999995
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ddnextm003 nextminus 0.9999999999999997 -> 0.9999999999999996
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ddnextm004 nextminus 0.9999999999999998 -> 0.9999999999999997
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ddnextm005 nextminus 0.9999999999999999 -> 0.9999999999999998
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ddnextm006 nextminus 1.000000000000000 -> 0.9999999999999999
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ddnextm007 nextminus 1.0 -> 0.9999999999999999
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ddnextm008 nextminus 1 -> 0.9999999999999999
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ddnextm009 nextminus 1.000000000000001 -> 1.000000000000000
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ddnextm010 nextminus 1.000000000000002 -> 1.000000000000001
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ddnextm011 nextminus 1.000000000000003 -> 1.000000000000002
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ddnextm012 nextminus 1.000000000000004 -> 1.000000000000003
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ddnextm013 nextminus 1.000000000000005 -> 1.000000000000004
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ddnextm014 nextminus 1.000000000000006 -> 1.000000000000005
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ddnextm015 nextminus 1.000000000000007 -> 1.000000000000006
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ddnextm016 nextminus 1.000000000000008 -> 1.000000000000007
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ddnextm017 nextminus 1.000000000000009 -> 1.000000000000008
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ddnextm018 nextminus 1.000000000000010 -> 1.000000000000009
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ddnextm019 nextminus 1.000000000000011 -> 1.000000000000010
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ddnextm020 nextminus 1.000000000000012 -> 1.000000000000011
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ddnextm021 nextminus -0.9999999999999995 -> -0.9999999999999996
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ddnextm022 nextminus -0.9999999999999996 -> -0.9999999999999997
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ddnextm023 nextminus -0.9999999999999997 -> -0.9999999999999998
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ddnextm024 nextminus -0.9999999999999998 -> -0.9999999999999999
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ddnextm025 nextminus -0.9999999999999999 -> -1.000000000000000
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ddnextm026 nextminus -1.000000000000000 -> -1.000000000000001
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ddnextm027 nextminus -1.0 -> -1.000000000000001
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ddnextm028 nextminus -1 -> -1.000000000000001
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ddnextm029 nextminus -1.000000000000001 -> -1.000000000000002
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ddnextm030 nextminus -1.000000000000002 -> -1.000000000000003
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ddnextm031 nextminus -1.000000000000003 -> -1.000000000000004
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ddnextm032 nextminus -1.000000000000004 -> -1.000000000000005
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ddnextm033 nextminus -1.000000000000005 -> -1.000000000000006
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ddnextm034 nextminus -1.000000000000006 -> -1.000000000000007
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ddnextm035 nextminus -1.000000000000007 -> -1.000000000000008
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ddnextm036 nextminus -1.000000000000008 -> -1.000000000000009
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ddnextm037 nextminus -1.000000000000009 -> -1.000000000000010
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ddnextm038 nextminus -1.000000000000010 -> -1.000000000000011
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ddnextm039 nextminus -1.000000000000011 -> -1.000000000000012
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-- ultra-tiny inputs
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ddnextm062 nextminus 1E-398 -> 0E-398
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ddnextm065 nextminus -1E-398 -> -2E-398
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-- Zeros
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ddnextm100 nextminus -0 -> -1E-398
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ddnextm101 nextminus 0 -> -1E-398
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ddnextm102 nextminus 0.00 -> -1E-398
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ddnextm103 nextminus -0.00 -> -1E-398
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ddnextm104 nextminus 0E-300 -> -1E-398
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ddnextm105 nextminus 0E+300 -> -1E-398
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ddnextm106 nextminus 0E+30000 -> -1E-398
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ddnextm107 nextminus -0E+30000 -> -1E-398
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-- specials
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ddnextm150 nextminus Inf -> 9.999999999999999E+384
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ddnextm151 nextminus -Inf -> -Infinity
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ddnextm152 nextminus NaN -> NaN
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ddnextm153 nextminus sNaN -> NaN Invalid_operation
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ddnextm154 nextminus NaN77 -> NaN77
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ddnextm155 nextminus sNaN88 -> NaN88 Invalid_operation
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ddnextm156 nextminus -NaN -> -NaN
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ddnextm157 nextminus -sNaN -> -NaN Invalid_operation
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ddnextm158 nextminus -NaN77 -> -NaN77
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ddnextm159 nextminus -sNaN88 -> -NaN88 Invalid_operation
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-- Nmax, Nmin, Ntiny, subnormals
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ddnextm170 nextminus 9.999999999999999E+384 -> 9.999999999999998E+384
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ddnextm171 nextminus 9.999999999999998E+384 -> 9.999999999999997E+384
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ddnextm172 nextminus 1E-383 -> 9.99999999999999E-384
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ddnextm173 nextminus 1.000000000000000E-383 -> 9.99999999999999E-384
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ddnextm174 nextminus 9E-398 -> 8E-398
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ddnextm175 nextminus 9.9E-397 -> 9.8E-397
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ddnextm176 nextminus 9.99999999999E-387 -> 9.99999999998E-387
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ddnextm177 nextminus 9.99999999999999E-384 -> 9.99999999999998E-384
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ddnextm178 nextminus 9.99999999999998E-384 -> 9.99999999999997E-384
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ddnextm179 nextminus 9.99999999999997E-384 -> 9.99999999999996E-384
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ddnextm180 nextminus 0E-398 -> -1E-398
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ddnextm181 nextminus 1E-398 -> 0E-398
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ddnextm182 nextminus 2E-398 -> 1E-398
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ddnextm183 nextminus -0E-398 -> -1E-398
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ddnextm184 nextminus -1E-398 -> -2E-398
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ddnextm185 nextminus -2E-398 -> -3E-398
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ddnextm186 nextminus -10E-398 -> -1.1E-397
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ddnextm187 nextminus -100E-398 -> -1.01E-396
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ddnextm188 nextminus -100000E-398 -> -1.00001E-393
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ddnextm189 nextminus -1.00000000000E-383 -> -1.000000000000001E-383
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ddnextm190 nextminus -1.000000000000000E-383 -> -1.000000000000001E-383
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ddnextm191 nextminus -1E-383 -> -1.000000000000001E-383
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ddnextm192 nextminus -9.999999999999998E+384 -> -9.999999999999999E+384
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ddnextm193 nextminus -9.999999999999999E+384 -> -Infinity
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-- Null tests
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ddnextm900 nextminus # -> NaN Invalid_operation
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