1------------------------------------------------------------------------ 2-- ddNextMinus.decTest -- decDouble next that is less [754r nextdown] -- 3-- Copyright (c) IBM Corporation, 1981, 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: 2.59 21 22-- All operands and results are decDoubles. 23precision: 16 24maxExponent: 384 25minExponent: -383 26extended: 1 27clamp: 1 28rounding: half_even 29 30ddnextm001 nextminus 0.9999999999999995 -> 0.9999999999999994 31ddnextm002 nextminus 0.9999999999999996 -> 0.9999999999999995 32ddnextm003 nextminus 0.9999999999999997 -> 0.9999999999999996 33ddnextm004 nextminus 0.9999999999999998 -> 0.9999999999999997 34ddnextm005 nextminus 0.9999999999999999 -> 0.9999999999999998 35ddnextm006 nextminus 1.000000000000000 -> 0.9999999999999999 36ddnextm007 nextminus 1.0 -> 0.9999999999999999 37ddnextm008 nextminus 1 -> 0.9999999999999999 38ddnextm009 nextminus 1.000000000000001 -> 1.000000000000000 39ddnextm010 nextminus 1.000000000000002 -> 1.000000000000001 40ddnextm011 nextminus 1.000000000000003 -> 1.000000000000002 41ddnextm012 nextminus 1.000000000000004 -> 1.000000000000003 42ddnextm013 nextminus 1.000000000000005 -> 1.000000000000004 43ddnextm014 nextminus 1.000000000000006 -> 1.000000000000005 44ddnextm015 nextminus 1.000000000000007 -> 1.000000000000006 45ddnextm016 nextminus 1.000000000000008 -> 1.000000000000007 46ddnextm017 nextminus 1.000000000000009 -> 1.000000000000008 47ddnextm018 nextminus 1.000000000000010 -> 1.000000000000009 48ddnextm019 nextminus 1.000000000000011 -> 1.000000000000010 49ddnextm020 nextminus 1.000000000000012 -> 1.000000000000011 50 51ddnextm021 nextminus -0.9999999999999995 -> -0.9999999999999996 52ddnextm022 nextminus -0.9999999999999996 -> -0.9999999999999997 53ddnextm023 nextminus -0.9999999999999997 -> -0.9999999999999998 54ddnextm024 nextminus -0.9999999999999998 -> -0.9999999999999999 55ddnextm025 nextminus -0.9999999999999999 -> -1.000000000000000 56ddnextm026 nextminus -1.000000000000000 -> -1.000000000000001 57ddnextm027 nextminus -1.0 -> -1.000000000000001 58ddnextm028 nextminus -1 -> -1.000000000000001 59ddnextm029 nextminus -1.000000000000001 -> -1.000000000000002 60ddnextm030 nextminus -1.000000000000002 -> -1.000000000000003 61ddnextm031 nextminus -1.000000000000003 -> -1.000000000000004 62ddnextm032 nextminus -1.000000000000004 -> -1.000000000000005 63ddnextm033 nextminus -1.000000000000005 -> -1.000000000000006 64ddnextm034 nextminus -1.000000000000006 -> -1.000000000000007 65ddnextm035 nextminus -1.000000000000007 -> -1.000000000000008 66ddnextm036 nextminus -1.000000000000008 -> -1.000000000000009 67ddnextm037 nextminus -1.000000000000009 -> -1.000000000000010 68ddnextm038 nextminus -1.000000000000010 -> -1.000000000000011 69ddnextm039 nextminus -1.000000000000011 -> -1.000000000000012 70 71-- ultra-tiny inputs 72ddnextm062 nextminus 1E-398 -> 0E-398 73ddnextm065 nextminus -1E-398 -> -2E-398 74 75-- Zeros 76ddnextm100 nextminus -0 -> -1E-398 77ddnextm101 nextminus 0 -> -1E-398 78ddnextm102 nextminus 0.00 -> -1E-398 79ddnextm103 nextminus -0.00 -> -1E-398 80ddnextm104 nextminus 0E-300 -> -1E-398 81ddnextm105 nextminus 0E+300 -> -1E-398 82ddnextm106 nextminus 0E+30000 -> -1E-398 83ddnextm107 nextminus -0E+30000 -> -1E-398 84 85-- specials 86ddnextm150 nextminus Inf -> 9.999999999999999E+384 87ddnextm151 nextminus -Inf -> -Infinity 88ddnextm152 nextminus NaN -> NaN 89ddnextm153 nextminus sNaN -> NaN Invalid_operation 90ddnextm154 nextminus NaN77 -> NaN77 91ddnextm155 nextminus sNaN88 -> NaN88 Invalid_operation 92ddnextm156 nextminus -NaN -> -NaN 93ddnextm157 nextminus -sNaN -> -NaN Invalid_operation 94ddnextm158 nextminus -NaN77 -> -NaN77 95ddnextm159 nextminus -sNaN88 -> -NaN88 Invalid_operation 96 97-- Nmax, Nmin, Ntiny, subnormals 98ddnextm170 nextminus 9.999999999999999E+384 -> 9.999999999999998E+384 99ddnextm171 nextminus 9.999999999999998E+384 -> 9.999999999999997E+384 100ddnextm172 nextminus 1E-383 -> 9.99999999999999E-384 101ddnextm173 nextminus 1.000000000000000E-383 -> 9.99999999999999E-384 102ddnextm174 nextminus 9E-398 -> 8E-398 103ddnextm175 nextminus 9.9E-397 -> 9.8E-397 104ddnextm176 nextminus 9.99999999999E-387 -> 9.99999999998E-387 105ddnextm177 nextminus 9.99999999999999E-384 -> 9.99999999999998E-384 106ddnextm178 nextminus 9.99999999999998E-384 -> 9.99999999999997E-384 107ddnextm179 nextminus 9.99999999999997E-384 -> 9.99999999999996E-384 108ddnextm180 nextminus 0E-398 -> -1E-398 109ddnextm181 nextminus 1E-398 -> 0E-398 110ddnextm182 nextminus 2E-398 -> 1E-398 111 112ddnextm183 nextminus -0E-398 -> -1E-398 113ddnextm184 nextminus -1E-398 -> -2E-398 114ddnextm185 nextminus -2E-398 -> -3E-398 115ddnextm186 nextminus -10E-398 -> -1.1E-397 116ddnextm187 nextminus -100E-398 -> -1.01E-396 117ddnextm188 nextminus -100000E-398 -> -1.00001E-393 118ddnextm189 nextminus -1.00000000000E-383 -> -1.000000000000001E-383 119ddnextm190 nextminus -1.000000000000000E-383 -> -1.000000000000001E-383 120ddnextm191 nextminus -1E-383 -> -1.000000000000001E-383 121ddnextm192 nextminus -9.999999999999998E+384 -> -9.999999999999999E+384 122ddnextm193 nextminus -9.999999999999999E+384 -> -Infinity 123 124-- Null tests 125ddnextm900 nextminus # -> NaN Invalid_operation 126 127