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------------------------------------------------------------------------
-- ddSubtract.decTest -- decDouble subtraction --
-- Copyright (c) IBM Corporation, 1981, 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
-- This set of tests are for decDoubles only; all arguments are
-- representable in a decDouble
precision: 16
maxExponent: 384
minExponent: -383
extended: 1
clamp: 1
rounding: half_even
-- [first group are 'quick confidence check']
ddsub001 subtract 0 0 -> '0'
ddsub002 subtract 1 1 -> '0'
ddsub003 subtract 1 2 -> '-1'
ddsub004 subtract 2 1 -> '1'
ddsub005 subtract 2 2 -> '0'
ddsub006 subtract 3 2 -> '1'
ddsub007 subtract 2 3 -> '-1'
ddsub011 subtract -0 0 -> '-0'
ddsub012 subtract -1 1 -> '-2'
ddsub013 subtract -1 2 -> '-3'
ddsub014 subtract -2 1 -> '-3'
ddsub015 subtract -2 2 -> '-4'
ddsub016 subtract -3 2 -> '-5'
ddsub017 subtract -2 3 -> '-5'
ddsub021 subtract 0 -0 -> '0'
ddsub022 subtract 1 -1 -> '2'
ddsub023 subtract 1 -2 -> '3'
ddsub024 subtract 2 -1 -> '3'
ddsub025 subtract 2 -2 -> '4'
ddsub026 subtract 3 -2 -> '5'
ddsub027 subtract 2 -3 -> '5'
ddsub030 subtract 11 1 -> 10
ddsub031 subtract 10 1 -> 9
ddsub032 subtract 9 1 -> 8
ddsub033 subtract 1 1 -> 0
ddsub034 subtract 0 1 -> -1
ddsub035 subtract -1 1 -> -2
ddsub036 subtract -9 1 -> -10
ddsub037 subtract -10 1 -> -11
ddsub038 subtract -11 1 -> -12
ddsub040 subtract '5.75' '3.3' -> '2.45'
ddsub041 subtract '5' '-3' -> '8'
ddsub042 subtract '-5' '-3' -> '-2'
ddsub043 subtract '-7' '2.5' -> '-9.5'
ddsub044 subtract '0.7' '0.3' -> '0.4'
ddsub045 subtract '1.3' '0.3' -> '1.0'
ddsub046 subtract '1.25' '1.25' -> '0.00'
ddsub050 subtract '1.23456789' '1.00000000' -> '0.23456789'
ddsub051 subtract '1.23456789' '1.00000089' -> '0.23456700'
ddsub060 subtract '70' '10000e+16' -> '-1.000000000000000E+20' Inexact Rounded
ddsub061 subtract '700' '10000e+16' -> '-1.000000000000000E+20' Inexact Rounded
ddsub062 subtract '7000' '10000e+16' -> '-9.999999999999999E+19' Inexact Rounded
ddsub063 subtract '70000' '10000e+16' -> '-9.999999999999993E+19' Rounded
ddsub064 subtract '700000' '10000e+16' -> '-9.999999999999930E+19' Rounded
-- symmetry:
ddsub065 subtract '10000e+16' '70' -> '1.000000000000000E+20' Inexact Rounded
ddsub066 subtract '10000e+16' '700' -> '1.000000000000000E+20' Inexact Rounded
ddsub067 subtract '10000e+16' '7000' -> '9.999999999999999E+19' Inexact Rounded
ddsub068 subtract '10000e+16' '70000' -> '9.999999999999993E+19' Rounded
ddsub069 subtract '10000e+16' '700000' -> '9.999999999999930E+19' Rounded
-- some of the next group are really constructor tests
ddsub090 subtract '00.0' '0.0' -> '0.0'
ddsub091 subtract '00.0' '0.00' -> '0.00'
ddsub092 subtract '0.00' '00.0' -> '0.00'
ddsub093 subtract '00.0' '0.00' -> '0.00'
ddsub094 subtract '0.00' '00.0' -> '0.00'
ddsub095 subtract '3' '.3' -> '2.7'
ddsub096 subtract '3.' '.3' -> '2.7'
ddsub097 subtract '3.0' '.3' -> '2.7'
ddsub098 subtract '3.00' '.3' -> '2.70'
ddsub099 subtract '3' '3' -> '0'
ddsub100 subtract '3' '+3' -> '0'
ddsub101 subtract '3' '-3' -> '6'
ddsub102 subtract '3' '0.3' -> '2.7'
ddsub103 subtract '3.' '0.3' -> '2.7'
ddsub104 subtract '3.0' '0.3' -> '2.7'
ddsub105 subtract '3.00' '0.3' -> '2.70'
ddsub106 subtract '3' '3.0' -> '0.0'
ddsub107 subtract '3' '+3.0' -> '0.0'
ddsub108 subtract '3' '-3.0' -> '6.0'
-- the above all from add; massaged and extended. Now some new ones...
-- [particularly important for comparisons]
-- NB: -xE-8 below were non-exponents pre-ANSI X3-274, and -1E-7 or 0E-7
-- with input rounding.
ddsub120 subtract '10.23456784' '10.23456789' -> '-5E-8'
ddsub121 subtract '10.23456785' '10.23456789' -> '-4E-8'
ddsub122 subtract '10.23456786' '10.23456789' -> '-3E-8'
ddsub123 subtract '10.23456787' '10.23456789' -> '-2E-8'
ddsub124 subtract '10.23456788' '10.23456789' -> '-1E-8'
ddsub125 subtract '10.23456789' '10.23456789' -> '0E-8'
ddsub126 subtract '10.23456790' '10.23456789' -> '1E-8'
ddsub127 subtract '10.23456791' '10.23456789' -> '2E-8'
ddsub128 subtract '10.23456792' '10.23456789' -> '3E-8'
ddsub129 subtract '10.23456793' '10.23456789' -> '4E-8'
ddsub130 subtract '10.23456794' '10.23456789' -> '5E-8'
ddsub131 subtract '10.23456781' '10.23456786' -> '-5E-8'
ddsub132 subtract '10.23456782' '10.23456786' -> '-4E-8'
ddsub133 subtract '10.23456783' '10.23456786' -> '-3E-8'
ddsub134 subtract '10.23456784' '10.23456786' -> '-2E-8'
ddsub135 subtract '10.23456785' '10.23456786' -> '-1E-8'
ddsub136 subtract '10.23456786' '10.23456786' -> '0E-8'
ddsub137 subtract '10.23456787' '10.23456786' -> '1E-8'
ddsub138 subtract '10.23456788' '10.23456786' -> '2E-8'
ddsub139 subtract '10.23456789' '10.23456786' -> '3E-8'
ddsub140 subtract '10.23456790' '10.23456786' -> '4E-8'
ddsub141 subtract '10.23456791' '10.23456786' -> '5E-8'
ddsub142 subtract '1' '0.999999999' -> '1E-9'
ddsub143 subtract '0.999999999' '1' -> '-1E-9'
ddsub144 subtract '-10.23456780' '-10.23456786' -> '6E-8'
ddsub145 subtract '-10.23456790' '-10.23456786' -> '-4E-8'
ddsub146 subtract '-10.23456791' '-10.23456786' -> '-5E-8'
-- additional scaled arithmetic tests [0.97 problem]
ddsub160 subtract '0' '.1' -> '-0.1'
ddsub161 subtract '00' '.97983' -> '-0.97983'
ddsub162 subtract '0' '.9' -> '-0.9'
ddsub163 subtract '0' '0.102' -> '-0.102'
ddsub164 subtract '0' '.4' -> '-0.4'
ddsub165 subtract '0' '.307' -> '-0.307'
ddsub166 subtract '0' '.43822' -> '-0.43822'
ddsub167 subtract '0' '.911' -> '-0.911'
ddsub168 subtract '.0' '.02' -> '-0.02'
ddsub169 subtract '00' '.392' -> '-0.392'
ddsub170 subtract '0' '.26' -> '-0.26'
ddsub171 subtract '0' '0.51' -> '-0.51'
ddsub172 subtract '0' '.2234' -> '-0.2234'
ddsub173 subtract '0' '.2' -> '-0.2'
ddsub174 subtract '.0' '.0008' -> '-0.0008'
-- 0. on left
ddsub180 subtract '0.0' '-.1' -> '0.1'
ddsub181 subtract '0.00' '-.97983' -> '0.97983'
ddsub182 subtract '0.0' '-.9' -> '0.9'
ddsub183 subtract '0.0' '-0.102' -> '0.102'
ddsub184 subtract '0.0' '-.4' -> '0.4'
ddsub185 subtract '0.0' '-.307' -> '0.307'
ddsub186 subtract '0.0' '-.43822' -> '0.43822'
ddsub187 subtract '0.0' '-.911' -> '0.911'
ddsub188 subtract '0.0' '-.02' -> '0.02'
ddsub189 subtract '0.00' '-.392' -> '0.392'
ddsub190 subtract '0.0' '-.26' -> '0.26'
ddsub191 subtract '0.0' '-0.51' -> '0.51'
ddsub192 subtract '0.0' '-.2234' -> '0.2234'
ddsub193 subtract '0.0' '-.2' -> '0.2'
ddsub194 subtract '0.0' '-.0008' -> '0.0008'
-- negatives of same
ddsub200 subtract '0' '-.1' -> '0.1'
ddsub201 subtract '00' '-.97983' -> '0.97983'
ddsub202 subtract '0' '-.9' -> '0.9'
ddsub203 subtract '0' '-0.102' -> '0.102'
ddsub204 subtract '0' '-.4' -> '0.4'
ddsub205 subtract '0' '-.307' -> '0.307'
ddsub206 subtract '0' '-.43822' -> '0.43822'
ddsub207 subtract '0' '-.911' -> '0.911'
ddsub208 subtract '.0' '-.02' -> '0.02'
ddsub209 subtract '00' '-.392' -> '0.392'
ddsub210 subtract '0' '-.26' -> '0.26'
ddsub211 subtract '0' '-0.51' -> '0.51'
ddsub212 subtract '0' '-.2234' -> '0.2234'
ddsub213 subtract '0' '-.2' -> '0.2'
ddsub214 subtract '.0' '-.0008' -> '0.0008'
-- more fixed, LHS swaps [really the same as testcases under add]
ddsub220 subtract '-56267E-12' 0 -> '-5.6267E-8'
ddsub221 subtract '-56267E-11' 0 -> '-5.6267E-7'
ddsub222 subtract '-56267E-10' 0 -> '-0.0000056267'
ddsub223 subtract '-56267E-9' 0 -> '-0.000056267'
ddsub224 subtract '-56267E-8' 0 -> '-0.00056267'
ddsub225 subtract '-56267E-7' 0 -> '-0.0056267'
ddsub226 subtract '-56267E-6' 0 -> '-0.056267'
ddsub227 subtract '-56267E-5' 0 -> '-0.56267'
ddsub228 subtract '-56267E-2' 0 -> '-562.67'
ddsub229 subtract '-56267E-1' 0 -> '-5626.7'
ddsub230 subtract '-56267E-0' 0 -> '-56267'
-- symmetry ...
ddsub240 subtract 0 '-56267E-12' -> '5.6267E-8'
ddsub241 subtract 0 '-56267E-11' -> '5.6267E-7'
ddsub242 subtract 0 '-56267E-10' -> '0.0000056267'
ddsub243 subtract 0 '-56267E-9' -> '0.000056267'
ddsub244 subtract 0 '-56267E-8' -> '0.00056267'
ddsub245 subtract 0 '-56267E-7' -> '0.0056267'
ddsub246 subtract 0 '-56267E-6' -> '0.056267'
ddsub247 subtract 0 '-56267E-5' -> '0.56267'
ddsub248 subtract 0 '-56267E-2' -> '562.67'
ddsub249 subtract 0 '-56267E-1' -> '5626.7'
ddsub250 subtract 0 '-56267E-0' -> '56267'
-- now some more from the 'new' add
ddsub301 subtract '1.23456789' '1.00000000' -> '0.23456789'
ddsub302 subtract '1.23456789' '1.00000011' -> '0.23456778'
-- some carrying effects
ddsub321 subtract '0.9998' '0.0000' -> '0.9998'
ddsub322 subtract '0.9998' '0.0001' -> '0.9997'
ddsub323 subtract '0.9998' '0.0002' -> '0.9996'
ddsub324 subtract '0.9998' '0.0003' -> '0.9995'
ddsub325 subtract '0.9998' '-0.0000' -> '0.9998'
ddsub326 subtract '0.9998' '-0.0001' -> '0.9999'
ddsub327 subtract '0.9998' '-0.0002' -> '1.0000'
ddsub328 subtract '0.9998' '-0.0003' -> '1.0001'
-- internal boundaries
ddsub346 subtract '10000e+9' '7' -> '9999999999993'
ddsub347 subtract '10000e+9' '70' -> '9999999999930'
ddsub348 subtract '10000e+9' '700' -> '9999999999300'
ddsub349 subtract '10000e+9' '7000' -> '9999999993000'
ddsub350 subtract '10000e+9' '70000' -> '9999999930000'
ddsub351 subtract '10000e+9' '700000' -> '9999999300000'
ddsub352 subtract '7' '10000e+9' -> '-9999999999993'
ddsub353 subtract '70' '10000e+9' -> '-9999999999930'
ddsub354 subtract '700' '10000e+9' -> '-9999999999300'
ddsub355 subtract '7000' '10000e+9' -> '-9999999993000'
ddsub356 subtract '70000' '10000e+9' -> '-9999999930000'
ddsub357 subtract '700000' '10000e+9' -> '-9999999300000'
-- zero preservation
ddsub361 subtract 1 '0.0001' -> '0.9999'
ddsub362 subtract 1 '0.00001' -> '0.99999'
ddsub363 subtract 1 '0.000001' -> '0.999999'
ddsub364 subtract 1 '0.0000000000000001' -> '0.9999999999999999'
ddsub365 subtract 1 '0.00000000000000001' -> '1.000000000000000' Inexact Rounded
ddsub366 subtract 1 '0.000000000000000001' -> '1.000000000000000' Inexact Rounded
-- some funny zeros [in case of bad signum]
ddsub370 subtract 1 0 -> 1
ddsub371 subtract 1 0. -> 1
ddsub372 subtract 1 .0 -> 1.0
ddsub373 subtract 1 0.0 -> 1.0
ddsub374 subtract 0 1 -> -1
ddsub375 subtract 0. 1 -> -1
ddsub376 subtract .0 1 -> -1.0
ddsub377 subtract 0.0 1 -> -1.0
-- leading 0 digit before round
ddsub910 subtract -103519362 -51897955.3 -> -51621406.7
ddsub911 subtract 159579.444 89827.5229 -> 69751.9211
ddsub920 subtract 333.0000000123456 33.00000001234566 -> 299.9999999999999 Inexact Rounded
ddsub921 subtract 333.0000000123456 33.00000001234565 -> 300.0000000000000 Inexact Rounded
ddsub922 subtract 133.0000000123456 33.00000001234565 -> 99.99999999999995
ddsub923 subtract 133.0000000123456 33.00000001234564 -> 99.99999999999996
ddsub924 subtract 133.0000000123456 33.00000001234540 -> 100.0000000000002 Rounded
ddsub925 subtract 133.0000000123456 43.00000001234560 -> 90.00000000000000
ddsub926 subtract 133.0000000123456 43.00000001234561 -> 89.99999999999999
ddsub927 subtract 133.0000000123456 43.00000001234566 -> 89.99999999999994
ddsub928 subtract 101.0000000123456 91.00000001234566 -> 9.99999999999994
ddsub929 subtract 101.0000000123456 99.00000001234566 -> 1.99999999999994
-- more LHS swaps [were fixed]
ddsub390 subtract '-56267E-10' 0 -> '-0.0000056267'
ddsub391 subtract '-56267E-6' 0 -> '-0.056267'
ddsub392 subtract '-56267E-5' 0 -> '-0.56267'
ddsub393 subtract '-56267E-4' 0 -> '-5.6267'
ddsub394 subtract '-56267E-3' 0 -> '-56.267'
ddsub395 subtract '-56267E-2' 0 -> '-562.67'
ddsub396 subtract '-56267E-1' 0 -> '-5626.7'
ddsub397 subtract '-56267E-0' 0 -> '-56267'
ddsub398 subtract '-5E-10' 0 -> '-5E-10'
ddsub399 subtract '-5E-7' 0 -> '-5E-7'
ddsub400 subtract '-5E-6' 0 -> '-0.000005'
ddsub401 subtract '-5E-5' 0 -> '-0.00005'
ddsub402 subtract '-5E-4' 0 -> '-0.0005'
ddsub403 subtract '-5E-1' 0 -> '-0.5'
ddsub404 subtract '-5E0' 0 -> '-5'
ddsub405 subtract '-5E1' 0 -> '-50'
ddsub406 subtract '-5E5' 0 -> '-500000'
ddsub407 subtract '-5E15' 0 -> '-5000000000000000'
ddsub408 subtract '-5E16' 0 -> '-5.000000000000000E+16' Rounded
ddsub409 subtract '-5E17' 0 -> '-5.000000000000000E+17' Rounded
ddsub410 subtract '-5E18' 0 -> '-5.000000000000000E+18' Rounded
ddsub411 subtract '-5E100' 0 -> '-5.000000000000000E+100' Rounded
-- more RHS swaps [were fixed]
ddsub420 subtract 0 '-56267E-10' -> '0.0000056267'
ddsub421 subtract 0 '-56267E-6' -> '0.056267'
ddsub422 subtract 0 '-56267E-5' -> '0.56267'
ddsub423 subtract 0 '-56267E-4' -> '5.6267'
ddsub424 subtract 0 '-56267E-3' -> '56.267'
ddsub425 subtract 0 '-56267E-2' -> '562.67'
ddsub426 subtract 0 '-56267E-1' -> '5626.7'
ddsub427 subtract 0 '-56267E-0' -> '56267'
ddsub428 subtract 0 '-5E-10' -> '5E-10'
ddsub429 subtract 0 '-5E-7' -> '5E-7'
ddsub430 subtract 0 '-5E-6' -> '0.000005'
ddsub431 subtract 0 '-5E-5' -> '0.00005'
ddsub432 subtract 0 '-5E-4' -> '0.0005'
ddsub433 subtract 0 '-5E-1' -> '0.5'
ddsub434 subtract 0 '-5E0' -> '5'
ddsub435 subtract 0 '-5E1' -> '50'
ddsub436 subtract 0 '-5E5' -> '500000'
ddsub437 subtract 0 '-5E15' -> '5000000000000000'
ddsub438 subtract 0 '-5E16' -> '5.000000000000000E+16' Rounded
ddsub439 subtract 0 '-5E17' -> '5.000000000000000E+17' Rounded
ddsub440 subtract 0 '-5E18' -> '5.000000000000000E+18' Rounded
ddsub441 subtract 0 '-5E100' -> '5.000000000000000E+100' Rounded
-- try borderline precision, with carries, etc.
ddsub461 subtract '1E+16' '1' -> '9999999999999999'
ddsub462 subtract '1E+12' '-1.111' -> '1000000000001.111'
ddsub463 subtract '1.111' '-1E+12' -> '1000000000001.111'
ddsub464 subtract '-1' '-1E+16' -> '9999999999999999'
ddsub465 subtract '7E+15' '1' -> '6999999999999999'
ddsub466 subtract '7E+12' '-1.111' -> '7000000000001.111'
ddsub467 subtract '1.111' '-7E+12' -> '7000000000001.111'
ddsub468 subtract '-1' '-7E+15' -> '6999999999999999'
-- 1234567890123456 1234567890123456 1 23456789012345
ddsub470 subtract '0.4444444444444444' '-0.5555555555555563' -> '1.000000000000001' Inexact Rounded
ddsub471 subtract '0.4444444444444444' '-0.5555555555555562' -> '1.000000000000001' Inexact Rounded
ddsub472 subtract '0.4444444444444444' '-0.5555555555555561' -> '1.000000000000000' Inexact Rounded
ddsub473 subtract '0.4444444444444444' '-0.5555555555555560' -> '1.000000000000000' Inexact Rounded
ddsub474 subtract '0.4444444444444444' '-0.5555555555555559' -> '1.000000000000000' Inexact Rounded
ddsub475 subtract '0.4444444444444444' '-0.5555555555555558' -> '1.000000000000000' Inexact Rounded
ddsub476 subtract '0.4444444444444444' '-0.5555555555555557' -> '1.000000000000000' Inexact Rounded
ddsub477 subtract '0.4444444444444444' '-0.5555555555555556' -> '1.000000000000000' Rounded
ddsub478 subtract '0.4444444444444444' '-0.5555555555555555' -> '0.9999999999999999'
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