------------------------------------------------------------------------

-- 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: 2.58

-- 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'

ddsub479 subtract '0.4444444444444444'  '-0.5555555555555554' -> '0.9999999999999998'

ddsub480 subtract '0.4444444444444444'  '-0.5555555555555553' -> '0.9999999999999997'

ddsub481 subtract '0.4444444444444444'  '-0.5555555555555552' -> '0.9999999999999996'

ddsub482 subtract '0.4444444444444444'  '-0.5555555555555551' -> '0.9999999999999995'

ddsub483 subtract '0.4444444444444444'  '-0.5555555555555550' -> '0.9999999999999994'

-- and some more, including residue effects and different roundings

rounding: half_up

ddsub500 subtract '1231234567456789' 0             -> '1231234567456789'

ddsub501 subtract '1231234567456789' 0.000000001   -> '1231234567456789' Inexact Rounded

ddsub502 subtract '1231234567456789' 0.000001      -> '1231234567456789' Inexact Rounded

ddsub503 subtract '1231234567456789' 0.1           -> '1231234567456789' Inexact Rounded

ddsub504 subtract '1231234567456789' 0.4           -> '1231234567456789' Inexact Rounded

ddsub505 subtract '1231234567456789' 0.49          -> '1231234567456789' Inexact Rounded

ddsub506 subtract '1231234567456789' 0.499999      -> '1231234567456789' Inexact Rounded

ddsub507 subtract '1231234567456789' 0.499999999   -> '1231234567456789' Inexact Rounded

ddsub508 subtract '1231234567456789' 0.5           -> '1231234567456789' Inexact Rounded

ddsub509 subtract '1231234567456789' 0.500000001   -> '1231234567456788' Inexact Rounded

ddsub510 subtract '1231234567456789' 0.500001      -> '1231234567456788' Inexact Rounded

ddsub511 subtract '1231234567456789' 0.51          -> '1231234567456788' Inexact Rounded

ddsub512 subtract '1231234567456789' 0.6           -> '1231234567456788' Inexact Rounded

ddsub513 subtract '1231234567456789' 0.9           -> '1231234567456788' Inexact Rounded

ddsub514 subtract '1231234567456789' 0.99999       -> '1231234567456788' Inexact Rounded

ddsub515 subtract '1231234567456789' 0.999999999   -> '1231234567456788' Inexact Rounded

ddsub516 subtract '1231234567456789' 1             -> '1231234567456788'

ddsub517 subtract '1231234567456789' 1.000000001   -> '1231234567456788' Inexact Rounded

ddsub518 subtract '1231234567456789' 1.00001       -> '1231234567456788' Inexact Rounded

ddsub519 subtract '1231234567456789' 1.1           -> '1231234567456788' Inexact Rounded

rounding: half_even

ddsub520 subtract '1231234567456789' 0             -> '1231234567456789'

ddsub521 subtract '1231234567456789' 0.000000001   -> '1231234567456789' Inexact Rounded

ddsub522 subtract '1231234567456789' 0.000001      -> '1231234567456789' Inexact Rounded

ddsub523 subtract '1231234567456789' 0.1           -> '1231234567456789' Inexact Rounded

ddsub524 subtract '1231234567456789' 0.4           -> '1231234567456789' Inexact Rounded

ddsub525 subtract '1231234567456789' 0.49          -> '1231234567456789' Inexact Rounded

ddsub526 subtract '1231234567456789' 0.499999      -> '1231234567456789' Inexact Rounded

ddsub527 subtract '1231234567456789' 0.499999999   -> '1231234567456789' Inexact Rounded

ddsub528 subtract '1231234567456789' 0.5           -> '1231234567456788' Inexact Rounded

ddsub529 subtract '1231234567456789' 0.500000001   -> '1231234567456788' Inexact Rounded

ddsub530 subtract '1231234567456789' 0.500001      -> '1231234567456788' Inexact Rounded

ddsub531 subtract '1231234567456789' 0.51          -> '1231234567456788' Inexact Rounded

ddsub532 subtract '1231234567456789' 0.6           -> '1231234567456788' Inexact Rounded

ddsub533 subtract '1231234567456789' 0.9           -> '1231234567456788' Inexact Rounded

ddsub534 subtract '1231234567456789' 0.99999       -> '1231234567456788' Inexact Rounded

ddsub535 subtract '1231234567456789' 0.999999999   -> '1231234567456788' Inexact Rounded

ddsub536 subtract '1231234567456789' 1             -> '1231234567456788'

ddsub537 subtract '1231234567456789' 1.00000001    -> '1231234567456788' Inexact Rounded

ddsub538 subtract '1231234567456789' 1.00001       -> '1231234567456788' Inexact Rounded

ddsub539 subtract '1231234567456789' 1.1           -> '1231234567456788' Inexact Rounded

-- critical few with even bottom digit...

ddsub540 subtract '1231234567456788' 0.499999999   -> '1231234567456788' Inexact Rounded

ddsub541 subtract '1231234567456788' 0.5           -> '1231234567456788' Inexact Rounded

ddsub542 subtract '1231234567456788' 0.500000001   -> '1231234567456787' Inexact Rounded

rounding: down

ddsub550 subtract '1231234567456789' 0             -> '1231234567456789'

ddsub551 subtract '1231234567456789' 0.000000001   -> '1231234567456788' Inexact Rounded

ddsub552 subtract '1231234567456789' 0.000001      -> '1231234567456788' Inexact Rounded

ddsub553 subtract '1231234567456789' 0.1           -> '1231234567456788' Inexact Rounded

ddsub554 subtract '1231234567456789' 0.4           -> '1231234567456788' Inexact Rounded

ddsub555 subtract '1231234567456789' 0.49          -> '1231234567456788' Inexact Rounded

ddsub556 subtract '1231234567456789' 0.499999      -> '1231234567456788' Inexact Rounded

ddsub557 subtract '1231234567456789' 0.499999999   -> '1231234567456788' Inexact Rounded

ddsub558 subtract '1231234567456789' 0.5           -> '1231234567456788' Inexact Rounded

ddsub559 subtract '1231234567456789' 0.500000001   -> '1231234567456788' Inexact Rounded

ddsub560 subtract '1231234567456789' 0.500001      -> '1231234567456788' Inexact Rounded

ddsub561 subtract '1231234567456789' 0.51          -> '1231234567456788' Inexact Rounded

ddsub562 subtract '1231234567456789' 0.6           -> '1231234567456788' Inexact Rounded

ddsub563 subtract '1231234567456789' 0.9           -> '1231234567456788' Inexact Rounded

ddsub564 subtract '1231234567456789' 0.99999       -> '1231234567456788' Inexact Rounded

ddsub565 subtract '1231234567456789' 0.999999999   -> '1231234567456788' Inexact Rounded

ddsub566 subtract '1231234567456789' 1             -> '1231234567456788'

ddsub567 subtract '1231234567456789' 1.00000001    -> '1231234567456787' Inexact Rounded

ddsub568 subtract '1231234567456789' 1.00001       -> '1231234567456787' Inexact Rounded

ddsub569 subtract '1231234567456789' 1.1           -> '1231234567456787' Inexact Rounded

-- symmetry...

rounding: half_up

ddsub600 subtract 0             '1231234567456789' -> '-1231234567456789'

ddsub601 subtract 0.000000001   '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub602 subtract 0.000001      '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub603 subtract 0.1           '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub604 subtract 0.4           '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub605 subtract 0.49          '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub606 subtract 0.499999      '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub607 subtract 0.499999999   '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub608 subtract 0.5           '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub609 subtract 0.500000001   '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub610 subtract 0.500001      '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub611 subtract 0.51          '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub612 subtract 0.6           '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub613 subtract 0.9           '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub614 subtract 0.99999       '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub615 subtract 0.999999999   '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub616 subtract 1             '1231234567456789' -> '-1231234567456788'

ddsub617 subtract 1.000000001   '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub618 subtract 1.00001       '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub619 subtract 1.1           '1231234567456789' -> '-1231234567456788' Inexact Rounded

rounding: half_even

ddsub620 subtract 0             '1231234567456789' -> '-1231234567456789'

ddsub621 subtract 0.000000001   '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub622 subtract 0.000001      '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub623 subtract 0.1           '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub624 subtract 0.4           '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub625 subtract 0.49          '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub626 subtract 0.499999      '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub627 subtract 0.499999999   '1231234567456789' -> '-1231234567456789' Inexact Rounded

ddsub628 subtract 0.5           '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub629 subtract 0.500000001   '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub630 subtract 0.500001      '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub631 subtract 0.51          '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub632 subtract 0.6           '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub633 subtract 0.9           '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub634 subtract 0.99999       '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub635 subtract 0.999999999   '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub636 subtract 1             '1231234567456789' -> '-1231234567456788'

ddsub637 subtract 1.00000001    '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub638 subtract 1.00001       '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub639 subtract 1.1           '1231234567456789' -> '-1231234567456788' Inexact Rounded

-- critical few with even bottom digit...

ddsub640 subtract 0.499999999   '1231234567456788' -> '-1231234567456788' Inexact Rounded

ddsub641 subtract 0.5           '1231234567456788' -> '-1231234567456788' Inexact Rounded

ddsub642 subtract 0.500000001   '1231234567456788' -> '-1231234567456787' Inexact Rounded

rounding: down

ddsub650 subtract 0             '1231234567456789' -> '-1231234567456789'

ddsub651 subtract 0.000000001   '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub652 subtract 0.000001      '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub653 subtract 0.1           '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub654 subtract 0.4           '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub655 subtract 0.49          '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub656 subtract 0.499999      '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub657 subtract 0.499999999   '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub658 subtract 0.5           '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub659 subtract 0.500000001   '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub660 subtract 0.500001      '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub661 subtract 0.51          '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub662 subtract 0.6           '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub663 subtract 0.9           '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub664 subtract 0.99999       '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub665 subtract 0.999999999   '1231234567456789' -> '-1231234567456788' Inexact Rounded

ddsub666 subtract 1             '1231234567456789' -> '-1231234567456788'

ddsub667 subtract 1.00000001    '1231234567456789' -> '-1231234567456787' Inexact Rounded

ddsub668 subtract 1.00001       '1231234567456789' -> '-1231234567456787' Inexact Rounded

ddsub669 subtract 1.1           '1231234567456789' -> '-1231234567456787' Inexact Rounded

-- lots of leading zeros in intermediate result, and showing effects of

-- input rounding would have affected the following

rounding: half_up

ddsub670 subtract '1234567456789' '1234567456788.1' -> 0.9

ddsub671 subtract '1234567456789' '1234567456788.9' -> 0.1

ddsub672 subtract '1234567456789' '1234567456789.1' -> -0.1

ddsub673 subtract '1234567456789' '1234567456789.5' -> -0.5

ddsub674 subtract '1234567456789' '1234567456789.9' -> -0.9

rounding: half_even

ddsub680 subtract '1234567456789' '1234567456788.1' -> 0.9

ddsub681 subtract '1234567456789' '1234567456788.9' -> 0.1

ddsub682 subtract '1234567456789' '1234567456789.1' -> -0.1

ddsub683 subtract '1234567456789' '1234567456789.5' -> -0.5

ddsub684 subtract '1234567456789' '1234567456789.9' -> -0.9

ddsub685 subtract '1234567456788' '1234567456787.1' -> 0.9

ddsub686 subtract '1234567456788' '1234567456787.9' -> 0.1

ddsub687 subtract '1234567456788' '1234567456788.1' -> -0.1

ddsub688 subtract '1234567456788' '1234567456788.5' -> -0.5

ddsub689 subtract '1234567456788' '1234567456788.9' -> -0.9

rounding: down

ddsub690 subtract '1234567456789' '1234567456788.1' -> 0.9

ddsub691 subtract '1234567456789' '1234567456788.9' -> 0.1

ddsub692 subtract '1234567456789' '1234567456789.1' -> -0.1

ddsub693 subtract '1234567456789' '1234567456789.5' -> -0.5

ddsub694 subtract '1234567456789' '1234567456789.9' -> -0.9

-- Specials

ddsub780 subtract -Inf   Inf   -> -Infinity

ddsub781 subtract -Inf   1000  -> -Infinity

ddsub782 subtract -Inf   1     -> -Infinity

ddsub783 subtract -Inf  -0     -> -Infinity

ddsub784 subtract -Inf  -1     -> -Infinity