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------------------------------------------------------------------------ -- 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: 2.59 -- 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
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