--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/python-2.5.2/win32/Lib/test/decimaltestdata/dqSubtract.decTest Fri Apr 03 17:19:34 2009 +0100
@@ -0,0 +1,635 @@
+------------------------------------------------------------------------
+-- dqSubtract.decTest -- decQuad subtraction --
+-- Copyright (c) IBM Corporation, 1981, 2007. 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: 2.57
+
+-- This set of tests are for decQuads only; all arguments are
+-- representable in a decQuad
+extended: 1
+clamp: 1
+precision: 34
+maxExponent: 6144
+minExponent: -6143
+rounding: half_even
+
+-- [first group are 'quick confidence check']
+dqsub001 subtract 0 0 -> '0'
+dqsub002 subtract 1 1 -> '0'
+dqsub003 subtract 1 2 -> '-1'
+dqsub004 subtract 2 1 -> '1'
+dqsub005 subtract 2 2 -> '0'
+dqsub006 subtract 3 2 -> '1'
+dqsub007 subtract 2 3 -> '-1'
+
+dqsub011 subtract -0 0 -> '-0'
+dqsub012 subtract -1 1 -> '-2'
+dqsub013 subtract -1 2 -> '-3'
+dqsub014 subtract -2 1 -> '-3'
+dqsub015 subtract -2 2 -> '-4'
+dqsub016 subtract -3 2 -> '-5'
+dqsub017 subtract -2 3 -> '-5'
+
+dqsub021 subtract 0 -0 -> '0'
+dqsub022 subtract 1 -1 -> '2'
+dqsub023 subtract 1 -2 -> '3'
+dqsub024 subtract 2 -1 -> '3'
+dqsub025 subtract 2 -2 -> '4'
+dqsub026 subtract 3 -2 -> '5'
+dqsub027 subtract 2 -3 -> '5'
+
+dqsub030 subtract 11 1 -> 10
+dqsub031 subtract 10 1 -> 9
+dqsub032 subtract 9 1 -> 8
+dqsub033 subtract 1 1 -> 0
+dqsub034 subtract 0 1 -> -1
+dqsub035 subtract -1 1 -> -2
+dqsub036 subtract -9 1 -> -10
+dqsub037 subtract -10 1 -> -11
+dqsub038 subtract -11 1 -> -12
+
+dqsub040 subtract '5.75' '3.3' -> '2.45'
+dqsub041 subtract '5' '-3' -> '8'
+dqsub042 subtract '-5' '-3' -> '-2'
+dqsub043 subtract '-7' '2.5' -> '-9.5'
+dqsub044 subtract '0.7' '0.3' -> '0.4'
+dqsub045 subtract '1.3' '0.3' -> '1.0'
+dqsub046 subtract '1.25' '1.25' -> '0.00'
+
+dqsub050 subtract '1.23456789' '1.00000000' -> '0.23456789'
+dqsub051 subtract '1.23456789' '1.00000089' -> '0.23456700'
+
+dqsub060 subtract '70' '10000e+34' -> '-1.000000000000000000000000000000000E+38' Inexact Rounded
+dqsub061 subtract '700' '10000e+34' -> '-1.000000000000000000000000000000000E+38' Inexact Rounded
+dqsub062 subtract '7000' '10000e+34' -> '-9.999999999999999999999999999999999E+37' Inexact Rounded
+dqsub063 subtract '70000' '10000e+34' -> '-9.999999999999999999999999999999993E+37' Rounded
+dqsub064 subtract '700000' '10000e+34' -> '-9.999999999999999999999999999999930E+37' Rounded
+ -- symmetry:
+dqsub065 subtract '10000e+34' '70' -> '1.000000000000000000000000000000000E+38' Inexact Rounded
+dqsub066 subtract '10000e+34' '700' -> '1.000000000000000000000000000000000E+38' Inexact Rounded
+dqsub067 subtract '10000e+34' '7000' -> '9.999999999999999999999999999999999E+37' Inexact Rounded
+dqsub068 subtract '10000e+34' '70000' -> '9.999999999999999999999999999999993E+37' Rounded
+dqsub069 subtract '10000e+34' '700000' -> '9.999999999999999999999999999999930E+37' Rounded
+
+ -- some of the next group are really constructor tests
+dqsub090 subtract '00.0' '0.0' -> '0.0'
+dqsub091 subtract '00.0' '0.00' -> '0.00'
+dqsub092 subtract '0.00' '00.0' -> '0.00'
+dqsub093 subtract '00.0' '0.00' -> '0.00'
+dqsub094 subtract '0.00' '00.0' -> '0.00'
+dqsub095 subtract '3' '.3' -> '2.7'
+dqsub096 subtract '3.' '.3' -> '2.7'
+dqsub097 subtract '3.0' '.3' -> '2.7'
+dqsub098 subtract '3.00' '.3' -> '2.70'
+dqsub099 subtract '3' '3' -> '0'
+dqsub100 subtract '3' '+3' -> '0'
+dqsub101 subtract '3' '-3' -> '6'
+dqsub102 subtract '3' '0.3' -> '2.7'
+dqsub103 subtract '3.' '0.3' -> '2.7'
+dqsub104 subtract '3.0' '0.3' -> '2.7'
+dqsub105 subtract '3.00' '0.3' -> '2.70'
+dqsub106 subtract '3' '3.0' -> '0.0'
+dqsub107 subtract '3' '+3.0' -> '0.0'
+dqsub108 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.
+dqsub120 subtract '10.23456784' '10.23456789' -> '-5E-8'
+dqsub121 subtract '10.23456785' '10.23456789' -> '-4E-8'
+dqsub122 subtract '10.23456786' '10.23456789' -> '-3E-8'
+dqsub123 subtract '10.23456787' '10.23456789' -> '-2E-8'
+dqsub124 subtract '10.23456788' '10.23456789' -> '-1E-8'
+dqsub125 subtract '10.23456789' '10.23456789' -> '0E-8'
+dqsub126 subtract '10.23456790' '10.23456789' -> '1E-8'
+dqsub127 subtract '10.23456791' '10.23456789' -> '2E-8'
+dqsub128 subtract '10.23456792' '10.23456789' -> '3E-8'
+dqsub129 subtract '10.23456793' '10.23456789' -> '4E-8'
+dqsub130 subtract '10.23456794' '10.23456789' -> '5E-8'
+dqsub131 subtract '10.23456781' '10.23456786' -> '-5E-8'
+dqsub132 subtract '10.23456782' '10.23456786' -> '-4E-8'
+dqsub133 subtract '10.23456783' '10.23456786' -> '-3E-8'
+dqsub134 subtract '10.23456784' '10.23456786' -> '-2E-8'
+dqsub135 subtract '10.23456785' '10.23456786' -> '-1E-8'
+dqsub136 subtract '10.23456786' '10.23456786' -> '0E-8'
+dqsub137 subtract '10.23456787' '10.23456786' -> '1E-8'
+dqsub138 subtract '10.23456788' '10.23456786' -> '2E-8'
+dqsub139 subtract '10.23456789' '10.23456786' -> '3E-8'
+dqsub140 subtract '10.23456790' '10.23456786' -> '4E-8'
+dqsub141 subtract '10.23456791' '10.23456786' -> '5E-8'
+dqsub142 subtract '1' '0.999999999' -> '1E-9'
+dqsub143 subtract '0.999999999' '1' -> '-1E-9'
+dqsub144 subtract '-10.23456780' '-10.23456786' -> '6E-8'
+dqsub145 subtract '-10.23456790' '-10.23456786' -> '-4E-8'
+dqsub146 subtract '-10.23456791' '-10.23456786' -> '-5E-8'
+
+-- additional scaled arithmetic tests [0.97 problem]
+dqsub160 subtract '0' '.1' -> '-0.1'
+dqsub161 subtract '00' '.97983' -> '-0.97983'
+dqsub162 subtract '0' '.9' -> '-0.9'
+dqsub163 subtract '0' '0.102' -> '-0.102'
+dqsub164 subtract '0' '.4' -> '-0.4'
+dqsub165 subtract '0' '.307' -> '-0.307'
+dqsub166 subtract '0' '.43822' -> '-0.43822'
+dqsub167 subtract '0' '.911' -> '-0.911'
+dqsub168 subtract '.0' '.02' -> '-0.02'
+dqsub169 subtract '00' '.392' -> '-0.392'
+dqsub170 subtract '0' '.26' -> '-0.26'
+dqsub171 subtract '0' '0.51' -> '-0.51'
+dqsub172 subtract '0' '.2234' -> '-0.2234'
+dqsub173 subtract '0' '.2' -> '-0.2'
+dqsub174 subtract '.0' '.0008' -> '-0.0008'
+-- 0. on left
+dqsub180 subtract '0.0' '-.1' -> '0.1'
+dqsub181 subtract '0.00' '-.97983' -> '0.97983'
+dqsub182 subtract '0.0' '-.9' -> '0.9'
+dqsub183 subtract '0.0' '-0.102' -> '0.102'
+dqsub184 subtract '0.0' '-.4' -> '0.4'
+dqsub185 subtract '0.0' '-.307' -> '0.307'
+dqsub186 subtract '0.0' '-.43822' -> '0.43822'
+dqsub187 subtract '0.0' '-.911' -> '0.911'
+dqsub188 subtract '0.0' '-.02' -> '0.02'
+dqsub189 subtract '0.00' '-.392' -> '0.392'
+dqsub190 subtract '0.0' '-.26' -> '0.26'
+dqsub191 subtract '0.0' '-0.51' -> '0.51'
+dqsub192 subtract '0.0' '-.2234' -> '0.2234'
+dqsub193 subtract '0.0' '-.2' -> '0.2'
+dqsub194 subtract '0.0' '-.0008' -> '0.0008'
+-- negatives of same
+dqsub200 subtract '0' '-.1' -> '0.1'
+dqsub201 subtract '00' '-.97983' -> '0.97983'
+dqsub202 subtract '0' '-.9' -> '0.9'
+dqsub203 subtract '0' '-0.102' -> '0.102'
+dqsub204 subtract '0' '-.4' -> '0.4'
+dqsub205 subtract '0' '-.307' -> '0.307'
+dqsub206 subtract '0' '-.43822' -> '0.43822'
+dqsub207 subtract '0' '-.911' -> '0.911'
+dqsub208 subtract '.0' '-.02' -> '0.02'
+dqsub209 subtract '00' '-.392' -> '0.392'
+dqsub210 subtract '0' '-.26' -> '0.26'
+dqsub211 subtract '0' '-0.51' -> '0.51'
+dqsub212 subtract '0' '-.2234' -> '0.2234'
+dqsub213 subtract '0' '-.2' -> '0.2'
+dqsub214 subtract '.0' '-.0008' -> '0.0008'
+
+-- more fixed, LHS swaps [really the same as testcases under add]
+dqsub220 subtract '-56267E-12' 0 -> '-5.6267E-8'
+dqsub221 subtract '-56267E-11' 0 -> '-5.6267E-7'
+dqsub222 subtract '-56267E-10' 0 -> '-0.0000056267'
+dqsub223 subtract '-56267E-9' 0 -> '-0.000056267'
+dqsub224 subtract '-56267E-8' 0 -> '-0.00056267'
+dqsub225 subtract '-56267E-7' 0 -> '-0.0056267'
+dqsub226 subtract '-56267E-6' 0 -> '-0.056267'
+dqsub227 subtract '-56267E-5' 0 -> '-0.56267'
+dqsub228 subtract '-56267E-2' 0 -> '-562.67'
+dqsub229 subtract '-56267E-1' 0 -> '-5626.7'
+dqsub230 subtract '-56267E-0' 0 -> '-56267'
+-- symmetry ...
+dqsub240 subtract 0 '-56267E-12' -> '5.6267E-8'
+dqsub241 subtract 0 '-56267E-11' -> '5.6267E-7'
+dqsub242 subtract 0 '-56267E-10' -> '0.0000056267'
+dqsub243 subtract 0 '-56267E-9' -> '0.000056267'
+dqsub244 subtract 0 '-56267E-8' -> '0.00056267'
+dqsub245 subtract 0 '-56267E-7' -> '0.0056267'
+dqsub246 subtract 0 '-56267E-6' -> '0.056267'
+dqsub247 subtract 0 '-56267E-5' -> '0.56267'
+dqsub248 subtract 0 '-56267E-2' -> '562.67'
+dqsub249 subtract 0 '-56267E-1' -> '5626.7'
+dqsub250 subtract 0 '-56267E-0' -> '56267'
+
+-- now some more from the 'new' add
+dqsub301 subtract '1.23456789' '1.00000000' -> '0.23456789'
+dqsub302 subtract '1.23456789' '1.00000011' -> '0.23456778'
+
+-- some carrying effects
+dqsub321 subtract '0.9998' '0.0000' -> '0.9998'
+dqsub322 subtract '0.9998' '0.0001' -> '0.9997'
+dqsub323 subtract '0.9998' '0.0002' -> '0.9996'
+dqsub324 subtract '0.9998' '0.0003' -> '0.9995'
+dqsub325 subtract '0.9998' '-0.0000' -> '0.9998'
+dqsub326 subtract '0.9998' '-0.0001' -> '0.9999'
+dqsub327 subtract '0.9998' '-0.0002' -> '1.0000'
+dqsub328 subtract '0.9998' '-0.0003' -> '1.0001'
+
+-- internal boundaries
+dqsub346 subtract '10000e+9' '7' -> '9999999999993'
+dqsub347 subtract '10000e+9' '70' -> '9999999999930'
+dqsub348 subtract '10000e+9' '700' -> '9999999999300'
+dqsub349 subtract '10000e+9' '7000' -> '9999999993000'
+dqsub350 subtract '10000e+9' '70000' -> '9999999930000'
+dqsub351 subtract '10000e+9' '700000' -> '9999999300000'
+dqsub352 subtract '7' '10000e+9' -> '-9999999999993'
+dqsub353 subtract '70' '10000e+9' -> '-9999999999930'
+dqsub354 subtract '700' '10000e+9' -> '-9999999999300'
+dqsub355 subtract '7000' '10000e+9' -> '-9999999993000'
+dqsub356 subtract '70000' '10000e+9' -> '-9999999930000'
+dqsub357 subtract '700000' '10000e+9' -> '-9999999300000'
+
+-- zero preservation
+dqsub361 subtract 1 '0.0001' -> '0.9999'
+dqsub362 subtract 1 '0.00001' -> '0.99999'
+dqsub363 subtract 1 '0.000001' -> '0.999999'
+dqsub364 subtract 1 '0.0000000000000000000000000000000001' -> '0.9999999999999999999999999999999999'
+dqsub365 subtract 1 '0.00000000000000000000000000000000001' -> '1.000000000000000000000000000000000' Inexact Rounded
+dqsub366 subtract 1 '0.000000000000000000000000000000000001' -> '1.000000000000000000000000000000000' Inexact Rounded
+
+-- some funny zeros [in case of bad signum]
+dqsub370 subtract 1 0 -> 1
+dqsub371 subtract 1 0. -> 1
+dqsub372 subtract 1 .0 -> 1.0
+dqsub373 subtract 1 0.0 -> 1.0
+dqsub374 subtract 0 1 -> -1
+dqsub375 subtract 0. 1 -> -1
+dqsub376 subtract .0 1 -> -1.0
+dqsub377 subtract 0.0 1 -> -1.0
+
+-- leading 0 digit before round
+dqsub910 subtract -103519362 -51897955.3 -> -51621406.7
+dqsub911 subtract 159579.444 89827.5229 -> 69751.9211
+
+dqsub920 subtract 333.0000000000000000000000000123456 33.00000000000000000000000001234566 -> 299.9999999999999999999999999999999 Inexact Rounded
+dqsub921 subtract 333.0000000000000000000000000123456 33.00000000000000000000000001234565 -> 300.0000000000000000000000000000000 Inexact Rounded
+dqsub922 subtract 133.0000000000000000000000000123456 33.00000000000000000000000001234565 -> 99.99999999999999999999999999999995
+dqsub923 subtract 133.0000000000000000000000000123456 33.00000000000000000000000001234564 -> 99.99999999999999999999999999999996
+dqsub924 subtract 133.0000000000000000000000000123456 33.00000000000000000000000001234540 -> 100.0000000000000000000000000000002 Rounded
+dqsub925 subtract 133.0000000000000000000000000123456 43.00000000000000000000000001234560 -> 90.00000000000000000000000000000000
+dqsub926 subtract 133.0000000000000000000000000123456 43.00000000000000000000000001234561 -> 89.99999999999999999999999999999999
+dqsub927 subtract 133.0000000000000000000000000123456 43.00000000000000000000000001234566 -> 89.99999999999999999999999999999994
+dqsub928 subtract 101.0000000000000000000000000123456 91.00000000000000000000000001234566 -> 9.99999999999999999999999999999994
+dqsub929 subtract 101.0000000000000000000000000123456 99.00000000000000000000000001234566 -> 1.99999999999999999999999999999994
+
+-- more LHS swaps [were fixed]
+dqsub390 subtract '-56267E-10' 0 -> '-0.0000056267'
+dqsub391 subtract '-56267E-6' 0 -> '-0.056267'
+dqsub392 subtract '-56267E-5' 0 -> '-0.56267'
+dqsub393 subtract '-56267E-4' 0 -> '-5.6267'
+dqsub394 subtract '-56267E-3' 0 -> '-56.267'
+dqsub395 subtract '-56267E-2' 0 -> '-562.67'
+dqsub396 subtract '-56267E-1' 0 -> '-5626.7'
+dqsub397 subtract '-56267E-0' 0 -> '-56267'
+dqsub398 subtract '-5E-10' 0 -> '-5E-10'
+dqsub399 subtract '-5E-7' 0 -> '-5E-7'
+dqsub400 subtract '-5E-6' 0 -> '-0.000005'
+dqsub401 subtract '-5E-5' 0 -> '-0.00005'
+dqsub402 subtract '-5E-4' 0 -> '-0.0005'
+dqsub403 subtract '-5E-1' 0 -> '-0.5'
+dqsub404 subtract '-5E0' 0 -> '-5'
+dqsub405 subtract '-5E1' 0 -> '-50'
+dqsub406 subtract '-5E5' 0 -> '-500000'
+dqsub407 subtract '-5E33' 0 -> '-5000000000000000000000000000000000'
+dqsub408 subtract '-5E34' 0 -> '-5.000000000000000000000000000000000E+34' Rounded
+dqsub409 subtract '-5E35' 0 -> '-5.000000000000000000000000000000000E+35' Rounded
+dqsub410 subtract '-5E36' 0 -> '-5.000000000000000000000000000000000E+36' Rounded
+dqsub411 subtract '-5E100' 0 -> '-5.000000000000000000000000000000000E+100' Rounded
+
+-- more RHS swaps [were fixed]
+dqsub420 subtract 0 '-56267E-10' -> '0.0000056267'
+dqsub421 subtract 0 '-56267E-6' -> '0.056267'
+dqsub422 subtract 0 '-56267E-5' -> '0.56267'
+dqsub423 subtract 0 '-56267E-4' -> '5.6267'
+dqsub424 subtract 0 '-56267E-3' -> '56.267'
+dqsub425 subtract 0 '-56267E-2' -> '562.67'
+dqsub426 subtract 0 '-56267E-1' -> '5626.7'
+dqsub427 subtract 0 '-56267E-0' -> '56267'
+dqsub428 subtract 0 '-5E-10' -> '5E-10'
+dqsub429 subtract 0 '-5E-7' -> '5E-7'
+dqsub430 subtract 0 '-5E-6' -> '0.000005'
+dqsub431 subtract 0 '-5E-5' -> '0.00005'
+dqsub432 subtract 0 '-5E-4' -> '0.0005'
+dqsub433 subtract 0 '-5E-1' -> '0.5'
+dqsub434 subtract 0 '-5E0' -> '5'
+dqsub435 subtract 0 '-5E1' -> '50'
+dqsub436 subtract 0 '-5E5' -> '500000'
+dqsub437 subtract 0 '-5E33' -> '5000000000000000000000000000000000'
+dqsub438 subtract 0 '-5E34' -> '5.000000000000000000000000000000000E+34' Rounded
+dqsub439 subtract 0 '-5E35' -> '5.000000000000000000000000000000000E+35' Rounded
+dqsub440 subtract 0 '-5E36' -> '5.000000000000000000000000000000000E+36' Rounded
+dqsub441 subtract 0 '-5E100' -> '5.000000000000000000000000000000000E+100' Rounded
+
+
+-- try borderline precision, with carries, etc.
+dqsub461 subtract '1E+16' '1' -> '9999999999999999'
+dqsub462 subtract '1E+12' '-1.111' -> '1000000000001.111'
+dqsub463 subtract '1.111' '-1E+12' -> '1000000000001.111'
+dqsub464 subtract '-1' '-1E+16' -> '9999999999999999'
+dqsub465 subtract '7E+15' '1' -> '6999999999999999'
+dqsub466 subtract '7E+12' '-1.111' -> '7000000000001.111'
+dqsub467 subtract '1.111' '-7E+12' -> '7000000000001.111'
+dqsub468 subtract '-1' '-7E+15' -> '6999999999999999'
+
+-- 1234567890123456 1234567890123456 1 23456789012345
+dqsub470 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555563' -> '1.000000000000000000000000000000001' Inexact Rounded
+dqsub471 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555562' -> '1.000000000000000000000000000000001' Inexact Rounded
+dqsub472 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555561' -> '1.000000000000000000000000000000000' Inexact Rounded
+dqsub473 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555560' -> '1.000000000000000000000000000000000' Inexact Rounded
+dqsub474 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555559' -> '1.000000000000000000000000000000000' Inexact Rounded
+dqsub475 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555558' -> '1.000000000000000000000000000000000' Inexact Rounded
+dqsub476 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555557' -> '1.000000000000000000000000000000000' Inexact Rounded
+dqsub477 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555556' -> '1.000000000000000000000000000000000' Rounded
+dqsub478 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555555' -> '0.9999999999999999999999999999999999'
+dqsub479 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555554' -> '0.9999999999999999999999999999999998'
+dqsub480 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555553' -> '0.9999999999999999999999999999999997'
+dqsub481 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555552' -> '0.9999999999999999999999999999999996'
+dqsub482 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555551' -> '0.9999999999999999999999999999999995'
+dqsub483 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555550' -> '0.9999999999999999999999999999999994'
+
+-- and some more, including residue effects and different roundings
+rounding: half_up
+dqsub500 subtract '1231234555555555555555555567456789' 0 -> '1231234555555555555555555567456789'
+dqsub501 subtract '1231234555555555555555555567456789' 0.000000001 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub502 subtract '1231234555555555555555555567456789' 0.000001 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub503 subtract '1231234555555555555555555567456789' 0.1 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub504 subtract '1231234555555555555555555567456789' 0.4 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub505 subtract '1231234555555555555555555567456789' 0.49 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub506 subtract '1231234555555555555555555567456789' 0.499999 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub507 subtract '1231234555555555555555555567456789' 0.499999999 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub508 subtract '1231234555555555555555555567456789' 0.5 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub509 subtract '1231234555555555555555555567456789' 0.500000001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub510 subtract '1231234555555555555555555567456789' 0.500001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub511 subtract '1231234555555555555555555567456789' 0.51 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub512 subtract '1231234555555555555555555567456789' 0.6 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub513 subtract '1231234555555555555555555567456789' 0.9 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub514 subtract '1231234555555555555555555567456789' 0.99999 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub515 subtract '1231234555555555555555555567456789' 0.999999999 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub516 subtract '1231234555555555555555555567456789' 1 -> '1231234555555555555555555567456788'
+dqsub517 subtract '1231234555555555555555555567456789' 1.000000001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub518 subtract '1231234555555555555555555567456789' 1.00001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub519 subtract '1231234555555555555555555567456789' 1.1 -> '1231234555555555555555555567456788' Inexact Rounded
+
+rounding: half_even
+dqsub520 subtract '1231234555555555555555555567456789' 0 -> '1231234555555555555555555567456789'
+dqsub521 subtract '1231234555555555555555555567456789' 0.000000001 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub522 subtract '1231234555555555555555555567456789' 0.000001 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub523 subtract '1231234555555555555555555567456789' 0.1 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub524 subtract '1231234555555555555555555567456789' 0.4 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub525 subtract '1231234555555555555555555567456789' 0.49 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub526 subtract '1231234555555555555555555567456789' 0.499999 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub527 subtract '1231234555555555555555555567456789' 0.499999999 -> '1231234555555555555555555567456789' Inexact Rounded
+dqsub528 subtract '1231234555555555555555555567456789' 0.5 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub529 subtract '1231234555555555555555555567456789' 0.500000001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub530 subtract '1231234555555555555555555567456789' 0.500001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub531 subtract '1231234555555555555555555567456789' 0.51 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub532 subtract '1231234555555555555555555567456789' 0.6 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub533 subtract '1231234555555555555555555567456789' 0.9 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub534 subtract '1231234555555555555555555567456789' 0.99999 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub535 subtract '1231234555555555555555555567456789' 0.999999999 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub536 subtract '1231234555555555555555555567456789' 1 -> '1231234555555555555555555567456788'
+dqsub537 subtract '1231234555555555555555555567456789' 1.00000001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub538 subtract '1231234555555555555555555567456789' 1.00001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub539 subtract '1231234555555555555555555567456789' 1.1 -> '1231234555555555555555555567456788' Inexact Rounded
+-- critical few with even bottom digit...
+dqsub540 subtract '1231234555555555555555555567456788' 0.499999999 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub541 subtract '1231234555555555555555555567456788' 0.5 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub542 subtract '1231234555555555555555555567456788' 0.500000001 -> '1231234555555555555555555567456787' Inexact Rounded
+
+rounding: down
+dqsub550 subtract '1231234555555555555555555567456789' 0 -> '1231234555555555555555555567456789'
+dqsub551 subtract '1231234555555555555555555567456789' 0.000000001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub552 subtract '1231234555555555555555555567456789' 0.000001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub553 subtract '1231234555555555555555555567456789' 0.1 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub554 subtract '1231234555555555555555555567456789' 0.4 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub555 subtract '1231234555555555555555555567456789' 0.49 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub556 subtract '1231234555555555555555555567456789' 0.499999 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub557 subtract '1231234555555555555555555567456789' 0.499999999 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub558 subtract '1231234555555555555555555567456789' 0.5 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub559 subtract '1231234555555555555555555567456789' 0.500000001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub560 subtract '1231234555555555555555555567456789' 0.500001 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub561 subtract '1231234555555555555555555567456789' 0.51 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub562 subtract '1231234555555555555555555567456789' 0.6 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub563 subtract '1231234555555555555555555567456789' 0.9 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub564 subtract '1231234555555555555555555567456789' 0.99999 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub565 subtract '1231234555555555555555555567456789' 0.999999999 -> '1231234555555555555555555567456788' Inexact Rounded
+dqsub566 subtract '1231234555555555555555555567456789' 1 -> '1231234555555555555555555567456788'
+dqsub567 subtract '1231234555555555555555555567456789' 1.00000001 -> '1231234555555555555555555567456787' Inexact Rounded
+dqsub568 subtract '1231234555555555555555555567456789' 1.00001 -> '1231234555555555555555555567456787' Inexact Rounded
+dqsub569 subtract '1231234555555555555555555567456789' 1.1 -> '1231234555555555555555555567456787' Inexact Rounded
+
+-- symmetry...
+rounding: half_up
+dqsub600 subtract 0 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789'
+dqsub601 subtract 0.000000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub602 subtract 0.000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub603 subtract 0.1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub604 subtract 0.4 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub605 subtract 0.49 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub606 subtract 0.499999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub607 subtract 0.499999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub608 subtract 0.5 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub609 subtract 0.500000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub610 subtract 0.500001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub611 subtract 0.51 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub612 subtract 0.6 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub613 subtract 0.9 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub614 subtract 0.99999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub615 subtract 0.999999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub616 subtract 1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788'
+dqsub617 subtract 1.000000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub618 subtract 1.00001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub619 subtract 1.1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+
+rounding: half_even
+dqsub620 subtract 0 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789'
+dqsub621 subtract 0.000000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub622 subtract 0.000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub623 subtract 0.1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub624 subtract 0.4 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub625 subtract 0.49 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub626 subtract 0.499999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub627 subtract 0.499999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
+dqsub628 subtract 0.5 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub629 subtract 0.500000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub630 subtract 0.500001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub631 subtract 0.51 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub632 subtract 0.6 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub633 subtract 0.9 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub634 subtract 0.99999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub635 subtract 0.999999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub636 subtract 1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788'
+dqsub637 subtract 1.00000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub638 subtract 1.00001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub639 subtract 1.1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+-- critical few with even bottom digit...
+dqsub640 subtract 0.499999999 '1231234555555555555555555567456788' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub641 subtract 0.5 '1231234555555555555555555567456788' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub642 subtract 0.500000001 '1231234555555555555555555567456788' -> '-1231234555555555555555555567456787' Inexact Rounded
+
+rounding: down
+dqsub650 subtract 0 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789'
+dqsub651 subtract 0.000000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub652 subtract 0.000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub653 subtract 0.1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub654 subtract 0.4 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub655 subtract 0.49 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub656 subtract 0.499999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub657 subtract 0.499999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub658 subtract 0.5 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub659 subtract 0.500000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub660 subtract 0.500001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub661 subtract 0.51 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub662 subtract 0.6 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub663 subtract 0.9 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub664 subtract 0.99999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub665 subtract 0.999999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
+dqsub666 subtract 1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788'
+dqsub667 subtract 1.00000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456787' Inexact Rounded
+dqsub668 subtract 1.00001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456787' Inexact Rounded
+dqsub669 subtract 1.1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456787' Inexact Rounded
+
+
+-- lots of leading zeros in intermediate result, and showing effects of
+-- input rounding would have affected the following
+rounding: half_up
+dqsub670 subtract '1234567456789' '1234567456788.1' -> 0.9
+dqsub671 subtract '1234567456789' '1234567456788.9' -> 0.1
+dqsub672 subtract '1234567456789' '1234567456789.1' -> -0.1
+dqsub673 subtract '1234567456789' '1234567456789.5' -> -0.5
+dqsub674 subtract '1234567456789' '1234567456789.9' -> -0.9
+
+rounding: half_even
+dqsub680 subtract '1234567456789' '1234567456788.1' -> 0.9
+dqsub681 subtract '1234567456789' '1234567456788.9' -> 0.1
+dqsub682 subtract '1234567456789' '1234567456789.1' -> -0.1
+dqsub683 subtract '1234567456789' '1234567456789.5' -> -0.5
+dqsub684 subtract '1234567456789' '1234567456789.9' -> -0.9
+
+dqsub685 subtract '1234567456788' '1234567456787.1' -> 0.9
+dqsub686 subtract '1234567456788' '1234567456787.9' -> 0.1
+dqsub687 subtract '1234567456788' '1234567456788.1' -> -0.1
+dqsub688 subtract '1234567456788' '1234567456788.5' -> -0.5
+dqsub689 subtract '1234567456788' '1234567456788.9' -> -0.9
+
+rounding: down
+dqsub690 subtract '1234567456789' '1234567456788.1' -> 0.9
+dqsub691 subtract '1234567456789' '1234567456788.9' -> 0.1
+dqsub692 subtract '1234567456789' '1234567456789.1' -> -0.1
+dqsub693 subtract '1234567456789' '1234567456789.5' -> -0.5
+dqsub694 subtract '1234567456789' '1234567456789.9' -> -0.9
+
+-- Specials
+dqsub780 subtract -Inf Inf -> -Infinity
+dqsub781 subtract -Inf 1000 -> -Infinity
+dqsub782 subtract -Inf 1 -> -Infinity
+dqsub783 subtract -Inf -0 -> -Infinity
+dqsub784 subtract -Inf -1 -> -Infinity
+dqsub785 subtract -Inf -1000 -> -Infinity
+dqsub787 subtract -1000 Inf -> -Infinity
+dqsub788 subtract -Inf Inf -> -Infinity
+dqsub789 subtract -1 Inf -> -Infinity
+dqsub790 subtract 0 Inf -> -Infinity
+dqsub791 subtract 1 Inf -> -Infinity
+dqsub792 subtract 1000 Inf -> -Infinity
+
+dqsub800 subtract Inf Inf -> NaN Invalid_operation
+dqsub801 subtract Inf 1000 -> Infinity
+dqsub802 subtract Inf 1 -> Infinity
+dqsub803 subtract Inf 0 -> Infinity
+dqsub804 subtract Inf -0 -> Infinity
+dqsub805 subtract Inf -1 -> Infinity
+dqsub806 subtract Inf -1000 -> Infinity
+dqsub807 subtract Inf -Inf -> Infinity
+dqsub808 subtract -1000 -Inf -> Infinity
+dqsub809 subtract -Inf -Inf -> NaN Invalid_operation
+dqsub810 subtract -1 -Inf -> Infinity
+dqsub811 subtract -0 -Inf -> Infinity
+dqsub812 subtract 0 -Inf -> Infinity
+dqsub813 subtract 1 -Inf -> Infinity
+dqsub814 subtract 1000 -Inf -> Infinity
+dqsub815 subtract Inf -Inf -> Infinity
+
+dqsub821 subtract NaN Inf -> NaN
+dqsub822 subtract -NaN 1000 -> -NaN
+dqsub823 subtract NaN 1 -> NaN
+dqsub824 subtract NaN 0 -> NaN
+dqsub825 subtract NaN -0 -> NaN
+dqsub826 subtract NaN -1 -> NaN
+dqsub827 subtract NaN -1000 -> NaN
+dqsub828 subtract NaN -Inf -> NaN
+dqsub829 subtract -NaN NaN -> -NaN
+dqsub830 subtract -Inf NaN -> NaN
+dqsub831 subtract -1000 NaN -> NaN
+dqsub832 subtract -1 NaN -> NaN
+dqsub833 subtract -0 NaN -> NaN
+dqsub834 subtract 0 NaN -> NaN
+dqsub835 subtract 1 NaN -> NaN
+dqsub836 subtract 1000 -NaN -> -NaN
+dqsub837 subtract Inf NaN -> NaN
+
+dqsub841 subtract sNaN Inf -> NaN Invalid_operation
+dqsub842 subtract -sNaN 1000 -> -NaN Invalid_operation
+dqsub843 subtract sNaN 1 -> NaN Invalid_operation
+dqsub844 subtract sNaN 0 -> NaN Invalid_operation
+dqsub845 subtract sNaN -0 -> NaN Invalid_operation
+dqsub846 subtract sNaN -1 -> NaN Invalid_operation
+dqsub847 subtract sNaN -1000 -> NaN Invalid_operation
+dqsub848 subtract sNaN NaN -> NaN Invalid_operation
+dqsub849 subtract sNaN sNaN -> NaN Invalid_operation
+dqsub850 subtract NaN sNaN -> NaN Invalid_operation
+dqsub851 subtract -Inf -sNaN -> -NaN Invalid_operation
+dqsub852 subtract -1000 sNaN -> NaN Invalid_operation
+dqsub853 subtract -1 sNaN -> NaN Invalid_operation
+dqsub854 subtract -0 sNaN -> NaN Invalid_operation
+dqsub855 subtract 0 sNaN -> NaN Invalid_operation
+dqsub856 subtract 1 sNaN -> NaN Invalid_operation
+dqsub857 subtract 1000 sNaN -> NaN Invalid_operation
+dqsub858 subtract Inf sNaN -> NaN Invalid_operation
+dqsub859 subtract NaN sNaN -> NaN Invalid_operation
+
+-- propagating NaNs
+dqsub861 subtract NaN01 -Inf -> NaN1
+dqsub862 subtract -NaN02 -1000 -> -NaN2
+dqsub863 subtract NaN03 1000 -> NaN3
+dqsub864 subtract NaN04 Inf -> NaN4
+dqsub865 subtract NaN05 NaN61 -> NaN5
+dqsub866 subtract -Inf -NaN71 -> -NaN71
+dqsub867 subtract -1000 NaN81 -> NaN81
+dqsub868 subtract 1000 NaN91 -> NaN91
+dqsub869 subtract Inf NaN101 -> NaN101
+dqsub871 subtract sNaN011 -Inf -> NaN11 Invalid_operation
+dqsub872 subtract sNaN012 -1000 -> NaN12 Invalid_operation
+dqsub873 subtract -sNaN013 1000 -> -NaN13 Invalid_operation
+dqsub874 subtract sNaN014 NaN171 -> NaN14 Invalid_operation
+dqsub875 subtract sNaN015 sNaN181 -> NaN15 Invalid_operation
+dqsub876 subtract NaN016 sNaN191 -> NaN191 Invalid_operation
+dqsub877 subtract -Inf sNaN201 -> NaN201 Invalid_operation
+dqsub878 subtract -1000 sNaN211 -> NaN211 Invalid_operation
+dqsub879 subtract 1000 -sNaN221 -> -NaN221 Invalid_operation
+dqsub880 subtract Inf sNaN231 -> NaN231 Invalid_operation
+dqsub881 subtract NaN025 sNaN241 -> NaN241 Invalid_operation
+
+-- edge case spills
+dqsub901 subtract 2.E-3 1.002 -> -1.000
+dqsub902 subtract 2.0E-3 1.002 -> -1.0000
+dqsub903 subtract 2.00E-3 1.0020 -> -1.00000
+dqsub904 subtract 2.000E-3 1.00200 -> -1.000000
+dqsub905 subtract 2.0000E-3 1.002000 -> -1.0000000
+dqsub906 subtract 2.00000E-3 1.0020000 -> -1.00000000
+dqsub907 subtract 2.000000E-3 1.00200000 -> -1.000000000
+dqsub908 subtract 2.0000000E-3 1.002000000 -> -1.0000000000
+
+-- subnormals and overflows covered under Add
+
+-- Examples from SQL proposal (Krishna Kulkarni)
+dqsub1125 subtract 130E-2 120E-2 -> 0.10
+dqsub1126 subtract 130E-2 12E-1 -> 0.10
+dqsub1127 subtract 130E-2 1E0 -> 0.30
+dqsub1128 subtract 1E2 1E4 -> -9.9E+3
+
+-- Null tests
+dqsub9990 subtract 10 # -> NaN Invalid_operation
+dqsub9991 subtract # 10 -> NaN Invalid_operation