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

-- minus.decTest -- decimal negation                                  --

-- 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 primarily tests the existence of the operator.

-- Subtraction, rounding, and more overflows are tested elsewhere.

extended:    1

precision:   9

rounding:    half_up

maxExponent: 384

minexponent: -383

minx001 minus '1'      -> '-1'

minx002 minus '-1'     -> '1'

minx003 minus '1.00'   -> '-1.00'

minx004 minus '-1.00'  -> '1.00'

minx005 minus '0'      -> '0'

minx006 minus '0.00'   -> '0.00'

minx007 minus '00.0'   -> '0.0'

minx008 minus '00.00'  -> '0.00'

minx009 minus '00'     -> '0'

minx010 minus '-2'     -> '2'

minx011 minus '2'      -> '-2'

minx012 minus '-2.00'  -> '2.00'

minx013 minus '2.00'   -> '-2.00'

minx014 minus '-0'     -> '0'

minx015 minus '-0.00'  -> '0.00'

minx016 minus '-00.0'  -> '0.0'

minx017 minus '-00.00' -> '0.00'

minx018 minus '-00'    -> '0'

-- "lhs" zeros in plus and minus have exponent = operand

minx020 minus '-0E3'   -> '0E+3'

minx021 minus '-0E2'   -> '0E+2'

minx022 minus '-0E1'   -> '0E+1'

minx023 minus '-0E0'   -> '0'

minx024 minus '+0E0'   -> '0'

minx025 minus '+0E1'   -> '0E+1'

minx026 minus '+0E2'   -> '0E+2'

minx027 minus '+0E3'   -> '0E+3'

minx030 minus '-5E3'   -> '5E+3'

minx031 minus '-5E8'   -> '5E+8'

minx032 minus '-5E13'  -> '5E+13'

minx033 minus '-5E18'  -> '5E+18'

minx034 minus '+5E3'   -> '-5E+3'

minx035 minus '+5E8'   -> '-5E+8'

minx036 minus '+5E13'  -> '-5E+13'

minx037 minus '+5E18'  -> '-5E+18'

minx050 minus '-2000000' -> '2000000'

minx051 minus '2000000'  -> '-2000000'

precision: 7

minx052 minus '-2000000' -> '2000000'

minx053 minus '2000000'  -> '-2000000'

precision: 6

minx054 minus '-2000000' -> '2.00000E+6' Rounded

minx055 minus '2000000'  -> '-2.00000E+6' Rounded

precision: 3

minx056 minus '-2000000' -> '2.00E+6' Rounded

minx057 minus '2000000'  -> '-2.00E+6' Rounded

-- more fixed, potential LHS swaps/overlays if done by 0 subtract x

precision: 9

minx060 minus '56267E-10'   -> '-0.0000056267'

minx061 minus '56267E-5'    -> '-0.56267'

minx062 minus '56267E-2'    -> '-562.67'

minx063 minus '56267E-1'    -> '-5626.7'

minx065 minus '56267E-0'    -> '-56267'

minx066 minus '56267E+0'    -> '-56267'

minx067 minus '56267E+1'    -> '-5.6267E+5'

minx068 minus '56267E+2'    -> '-5.6267E+6'

minx069 minus '56267E+3'    -> '-5.6267E+7'

minx070 minus '56267E+4'    -> '-5.6267E+8'

minx071 minus '56267E+5'    -> '-5.6267E+9'

minx072 minus '56267E+6'    -> '-5.6267E+10'

minx080 minus '-56267E-10'  -> '0.0000056267'

minx081 minus '-56267E-5'   -> '0.56267'

minx082 minus '-56267E-2'   -> '562.67'

minx083 minus '-56267E-1'   -> '5626.7'

minx085 minus '-56267E-0'   -> '56267'

minx086 minus '-56267E+0'   -> '56267'

minx087 minus '-56267E+1'   -> '5.6267E+5'

minx088 minus '-56267E+2'   -> '5.6267E+6'

minx089 minus '-56267E+3'   -> '5.6267E+7'

minx090 minus '-56267E+4'   -> '5.6267E+8'

minx091 minus '-56267E+5'   -> '5.6267E+9'

minx092 minus '-56267E+6'   -> '5.6267E+10'

-- overflow tests

maxexponent: 999999999

minexponent: -999999999

precision: 3

minx100 minus 9.999E+999999999  -> -Infinity Inexact Overflow Rounded

minx101 minus -9.999E+999999999 ->  Infinity Inexact Overflow Rounded

-- subnormals and underflow

precision: 3

maxexponent: 999

minexponent: -999

minx110 minus  1.00E-999        ->  -1.00E-999

minx111 minus  0.1E-999         ->  -1E-1000   Subnormal

minx112 minus  0.10E-999        ->  -1.0E-1000 Subnormal

minx113 minus  0.100E-999       ->  -1.0E-1000 Subnormal Rounded

minx114 minus  0.01E-999        ->  -1E-1001   Subnormal

-- next is rounded to Emin

minx115 minus  0.999E-999       ->  -1.00E-999 Inexact Rounded Subnormal Underflow

minx116 minus  0.099E-999       ->  -1.0E-1000 Inexact Rounded Subnormal Underflow

minx117 minus  0.009E-999       ->  -1E-1001   Inexact Rounded Subnormal Underflow

minx118 minus  0.001E-999       ->  -0E-1001   Inexact Rounded Subnormal Underflow Clamped

minx119 minus  0.0009E-999      ->  -0E-1001   Inexact Rounded Subnormal Underflow Clamped

minx120 minus  0.0001E-999      ->  -0E-1001   Inexact Rounded Subnormal Underflow Clamped

minx130 minus -1.00E-999        ->   1.00E-999

minx131 minus -0.1E-999         ->   1E-1000   Subnormal

minx132 minus -0.10E-999        ->   1.0E-1000 Subnormal

minx133 minus -0.100E-999       ->   1.0E-1000 Subnormal Rounded

minx134 minus -0.01E-999        ->   1E-1001   Subnormal

-- next is rounded to Emin

minx135 minus -0.999E-999       ->   1.00E-999 Inexact Rounded Subnormal Underflow

minx136 minus -0.099E-999       ->   1.0E-1000 Inexact Rounded Subnormal Underflow

minx137 minus -0.009E-999       ->   1E-1001   Inexact Rounded Subnormal Underflow

minx138 minus -0.001E-999       ->   0E-1001   Inexact Rounded Subnormal Underflow Clamped

minx139 minus -0.0009E-999      ->   0E-1001   Inexact Rounded Subnormal Underflow Clamped

minx140 minus -0.0001E-999      ->   0E-1001   Inexact Rounded Subnormal Underflow Clamped

-- long operand checks

maxexponent: 999

minexponent: -999

precision: 9

minx301 minus 12345678000  -> -1.23456780E+10 Rounded

minx302 minus 1234567800   -> -1.23456780E+9 Rounded

minx303 minus 1234567890   -> -1.23456789E+9 Rounded

minx304 minus 1234567891   -> -1.23456789E+9 Inexact Rounded

minx305 minus 12345678901  -> -1.23456789E+10 Inexact Rounded

minx306 minus 1234567896   -> -1.23456790E+9 Inexact Rounded

precision: 15

-- still checking

minx321 minus 12345678000  -> -12345678000

minx322 minus 1234567800   -> -1234567800

minx323 minus 1234567890   -> -1234567890

minx324 minus 1234567891   -> -1234567891

minx325 minus 12345678901  -> -12345678901

minx326 minus 1234567896   -> -1234567896

-- specials

minx420 minus 'Inf'    -> '-Infinity'

minx421 minus '-Inf'   -> 'Infinity'

minx422 minus   NaN    ->  NaN

minx423 minus  sNaN    ->  NaN    Invalid_operation

minx424 minus   NaN255 ->  NaN255

minx425 minus  sNaN256 ->  NaN256 Invalid_operation

minx426 minus  -NaN    -> -NaN

minx427 minus -sNaN    -> -NaN    Invalid_operation

minx428 minus  -NaN255 -> -NaN255

minx429 minus -sNaN256 -> -NaN256 Invalid_operation

-- Null tests

minx900 minus  # -> NaN Invalid_operation