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+------------------------------------------------------------------------
+-- plus.decTest -- decimal monadic addition --
+-- 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 primarily tests the existence of the operator.
+-- Addition and rounding, and most overflows, are tested elsewhere.
+
+extended: 1
+precision: 9
+rounding: half_up
+maxExponent: 384
+minexponent: -383
+
+plux001 plus '1' -> '1'
+plux002 plus '-1' -> '-1'
+plux003 plus '1.00' -> '1.00'
+plux004 plus '-1.00' -> '-1.00'
+plux005 plus '0' -> '0'
+plux006 plus '0.00' -> '0.00'
+plux007 plus '00.0' -> '0.0'
+plux008 plus '00.00' -> '0.00'
+plux009 plus '00' -> '0'
+
+plux010 plus '-2' -> '-2'
+plux011 plus '2' -> '2'
+plux012 plus '-2.00' -> '-2.00'
+plux013 plus '2.00' -> '2.00'
+plux014 plus '-0' -> '0'
+plux015 plus '-0.00' -> '0.00'
+plux016 plus '-00.0' -> '0.0'
+plux017 plus '-00.00' -> '0.00'
+plux018 plus '-00' -> '0'
+
+plux020 plus '-2000000' -> '-2000000'
+plux021 plus '2000000' -> '2000000'
+precision: 7
+plux022 plus '-2000000' -> '-2000000'
+plux023 plus '2000000' -> '2000000'
+precision: 6
+plux024 plus '-2000000' -> '-2.00000E+6' Rounded
+plux025 plus '2000000' -> '2.00000E+6' Rounded
+precision: 3
+plux026 plus '-2000000' -> '-2.00E+6' Rounded
+plux027 plus '2000000' -> '2.00E+6' Rounded
+
+-- more fixed, potential LHS swaps if done by add 0
+precision: 9
+plux060 plus '56267E-10' -> '0.0000056267'
+plux061 plus '56267E-5' -> '0.56267'
+plux062 plus '56267E-2' -> '562.67'
+plux063 plus '56267E-1' -> '5626.7'
+plux065 plus '56267E-0' -> '56267'
+plux066 plus '56267E+0' -> '56267'
+plux067 plus '56267E+1' -> '5.6267E+5'
+plux068 plus '56267E+2' -> '5.6267E+6'
+plux069 plus '56267E+3' -> '5.6267E+7'
+plux070 plus '56267E+4' -> '5.6267E+8'
+plux071 plus '56267E+5' -> '5.6267E+9'
+plux072 plus '56267E+6' -> '5.6267E+10'
+plux080 plus '-56267E-10' -> '-0.0000056267'
+plux081 plus '-56267E-5' -> '-0.56267'
+plux082 plus '-56267E-2' -> '-562.67'
+plux083 plus '-56267E-1' -> '-5626.7'
+plux085 plus '-56267E-0' -> '-56267'
+plux086 plus '-56267E+0' -> '-56267'
+plux087 plus '-56267E+1' -> '-5.6267E+5'
+plux088 plus '-56267E+2' -> '-5.6267E+6'
+plux089 plus '-56267E+3' -> '-5.6267E+7'
+plux090 plus '-56267E+4' -> '-5.6267E+8'
+plux091 plus '-56267E+5' -> '-5.6267E+9'
+plux092 plus '-56267E+6' -> '-5.6267E+10'
+
+-- "lhs" zeros in plus and minus have exponent = operand
+plux120 plus '-0E3' -> '0E+3'
+plux121 plus '-0E2' -> '0E+2'
+plux122 plus '-0E1' -> '0E+1'
+plux123 plus '-0E0' -> '0'
+plux124 plus '+0E0' -> '0'
+plux125 plus '+0E1' -> '0E+1'
+plux126 plus '+0E2' -> '0E+2'
+plux127 plus '+0E3' -> '0E+3'
+
+plux130 plus '-5E3' -> '-5E+3'
+plux131 plus '-5E8' -> '-5E+8'
+plux132 plus '-5E13' -> '-5E+13'
+plux133 plus '-5E18' -> '-5E+18'
+plux134 plus '+5E3' -> '5E+3'
+plux135 plus '+5E8' -> '5E+8'
+plux136 plus '+5E13' -> '5E+13'
+plux137 plus '+5E18' -> '5E+18'
+
+-- specials
+plux150 plus 'Inf' -> 'Infinity'
+plux151 plus '-Inf' -> '-Infinity'
+plux152 plus NaN -> NaN
+plux153 plus sNaN -> NaN Invalid_operation
+plux154 plus NaN77 -> NaN77
+plux155 plus sNaN88 -> NaN88 Invalid_operation
+plux156 plus -NaN -> -NaN
+plux157 plus -sNaN -> -NaN Invalid_operation
+plux158 plus -NaN77 -> -NaN77
+plux159 plus -sNaN88 -> -NaN88 Invalid_operation
+
+-- overflow tests
+maxexponent: 999999999
+minexponent: -999999999
+precision: 3
+plux160 plus 9.999E+999999999 -> Infinity Inexact Overflow Rounded
+plux161 plus -9.999E+999999999 -> -Infinity Inexact Overflow Rounded
+
+-- subnormals and underflow
+precision: 3
+maxexponent: 999
+minexponent: -999
+plux210 plus 1.00E-999 -> 1.00E-999
+plux211 plus 0.1E-999 -> 1E-1000 Subnormal
+plux212 plus 0.10E-999 -> 1.0E-1000 Subnormal
+plux213 plus 0.100E-999 -> 1.0E-1000 Subnormal Rounded
+plux214 plus 0.01E-999 -> 1E-1001 Subnormal
+-- next is rounded to Emin
+plux215 plus 0.999E-999 -> 1.00E-999 Inexact Rounded Subnormal Underflow
+plux216 plus 0.099E-999 -> 1.0E-1000 Inexact Rounded Subnormal Underflow
+plux217 plus 0.009E-999 -> 1E-1001 Inexact Rounded Subnormal Underflow
+plux218 plus 0.001E-999 -> 0E-1001 Inexact Rounded Subnormal Underflow Clamped
+plux219 plus 0.0009E-999 -> 0E-1001 Inexact Rounded Subnormal Underflow Clamped
+plux220 plus 0.0001E-999 -> 0E-1001 Inexact Rounded Subnormal Underflow Clamped
+
+plux230 plus -1.00E-999 -> -1.00E-999
+plux231 plus -0.1E-999 -> -1E-1000 Subnormal
+plux232 plus -0.10E-999 -> -1.0E-1000 Subnormal
+plux233 plus -0.100E-999 -> -1.0E-1000 Subnormal Rounded
+plux234 plus -0.01E-999 -> -1E-1001 Subnormal
+-- next is rounded to Emin
+plux235 plus -0.999E-999 -> -1.00E-999 Inexact Rounded Subnormal Underflow
+plux236 plus -0.099E-999 -> -1.0E-1000 Inexact Rounded Subnormal Underflow
+plux237 plus -0.009E-999 -> -1E-1001 Inexact Rounded Subnormal Underflow
+plux238 plus -0.001E-999 -> -0E-1001 Inexact Rounded Subnormal Underflow Clamped
+plux239 plus -0.0009E-999 -> -0E-1001 Inexact Rounded Subnormal Underflow Clamped
+plux240 plus -0.0001E-999 -> -0E-1001 Inexact Rounded Subnormal Underflow Clamped
+
+-- subnormals clamped to 0-Etiny
+precision: 16
+maxExponent: 384
+minExponent: -383
+plux251 plus 7E-398 -> 7E-398 Subnormal
+plux252 plus 0E-398 -> 0E-398
+plux253 plus 7E-399 -> 1E-398 Subnormal Underflow Inexact Rounded
+plux254 plus 4E-399 -> 0E-398 Clamped Subnormal Underflow Inexact Rounded
+plux255 plus 7E-400 -> 0E-398 Clamped Subnormal Underflow Inexact Rounded
+plux256 plus 7E-401 -> 0E-398 Clamped Subnormal Underflow Inexact Rounded
+plux257 plus 0E-399 -> 0E-398 Clamped
+plux258 plus 0E-400 -> 0E-398 Clamped
+plux259 plus 0E-401 -> 0E-398 Clamped
+
+-- long operand checks
+maxexponent: 999
+minexponent: -999
+precision: 9
+plux301 plus 12345678000 -> 1.23456780E+10 Rounded
+plux302 plus 1234567800 -> 1.23456780E+9 Rounded
+plux303 plus 1234567890 -> 1.23456789E+9 Rounded
+plux304 plus 1234567891 -> 1.23456789E+9 Inexact Rounded
+plux305 plus 12345678901 -> 1.23456789E+10 Inexact Rounded
+plux306 plus 1234567896 -> 1.23456790E+9 Inexact Rounded
+
+-- still checking
+precision: 15
+plux321 plus 12345678000 -> 12345678000
+plux322 plus 1234567800 -> 1234567800
+plux323 plus 1234567890 -> 1234567890
+plux324 plus 1234567891 -> 1234567891
+plux325 plus 12345678901 -> 12345678901
+plux326 plus 1234567896 -> 1234567896
+precision: 9
+
+-- Null tests
+plu900 plus # -> NaN Invalid_operation
+
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