Merged the decimal-branch (revisions 54886 to 58140). Decimal is now
fully updated to the latests Decimal Specification (v1.66) and the
latests test cases (v2.56).
Thanks to Mark Dickinson for all his help during this process.
diff --git a/Lib/test/decimaltestdata/ddCopySign.decTest b/Lib/test/decimaltestdata/ddCopySign.decTest
new file mode 100644
index 0000000..7c83416
--- /dev/null
+++ b/Lib/test/decimaltestdata/ddCopySign.decTest
@@ -0,0 +1,175 @@
+------------------------------------------------------------------------
+-- ddCopySign.decTest -- quiet decDouble copy with sign from rhs --
+-- 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: 2.56
+
+-- All operands and results are decDoubles.
+precision: 16
+maxExponent: 384
+minExponent: -383
+extended: 1
+clamp: 1
+rounding: half_even
+
+-- Sanity check
+ddcps001 copysign +7.50 11 -> 7.50
+
+-- Infinities
+ddcps011 copysign Infinity 11 -> Infinity
+ddcps012 copysign -Infinity 11 -> Infinity
+
+-- NaNs, 0 payload
+ddcps021 copysign NaN 11 -> NaN
+ddcps022 copysign -NaN 11 -> NaN
+ddcps023 copysign sNaN 11 -> sNaN
+ddcps024 copysign -sNaN 11 -> sNaN
+
+-- NaNs, non-0 payload
+ddcps031 copysign NaN10 11 -> NaN10
+ddcps032 copysign -NaN10 11 -> NaN10
+ddcps033 copysign sNaN10 11 -> sNaN10
+ddcps034 copysign -sNaN10 11 -> sNaN10
+ddcps035 copysign NaN7 11 -> NaN7
+ddcps036 copysign -NaN7 11 -> NaN7
+ddcps037 copysign sNaN101 11 -> sNaN101
+ddcps038 copysign -sNaN101 11 -> sNaN101
+
+-- finites
+ddcps101 copysign 7 11 -> 7
+ddcps102 copysign -7 11 -> 7
+ddcps103 copysign 75 11 -> 75
+ddcps104 copysign -75 11 -> 75
+ddcps105 copysign 7.50 11 -> 7.50
+ddcps106 copysign -7.50 11 -> 7.50
+ddcps107 copysign 7.500 11 -> 7.500
+ddcps108 copysign -7.500 11 -> 7.500
+
+-- zeros
+ddcps111 copysign 0 11 -> 0
+ddcps112 copysign -0 11 -> 0
+ddcps113 copysign 0E+4 11 -> 0E+4
+ddcps114 copysign -0E+4 11 -> 0E+4
+ddcps115 copysign 0.0000 11 -> 0.0000
+ddcps116 copysign -0.0000 11 -> 0.0000
+ddcps117 copysign 0E-141 11 -> 0E-141
+ddcps118 copysign -0E-141 11 -> 0E-141
+
+-- full coefficients, alternating bits
+ddcps121 copysign 2682682682682682 11 -> 2682682682682682
+ddcps122 copysign -2682682682682682 11 -> 2682682682682682
+ddcps123 copysign 1341341341341341 11 -> 1341341341341341
+ddcps124 copysign -1341341341341341 11 -> 1341341341341341
+
+-- Nmax, Nmin, Ntiny
+ddcps131 copysign 9.999999999999999E+384 11 -> 9.999999999999999E+384
+ddcps132 copysign 1E-383 11 -> 1E-383
+ddcps133 copysign 1.000000000000000E-383 11 -> 1.000000000000000E-383
+ddcps134 copysign 1E-398 11 -> 1E-398
+
+ddcps135 copysign -1E-398 11 -> 1E-398
+ddcps136 copysign -1.000000000000000E-383 11 -> 1.000000000000000E-383
+ddcps137 copysign -1E-383 11 -> 1E-383
+ddcps138 copysign -9.999999999999999E+384 11 -> 9.999999999999999E+384
+
+-- repeat with negative RHS
+
+-- Infinities
+ddcps211 copysign Infinity -34 -> -Infinity
+ddcps212 copysign -Infinity -34 -> -Infinity
+
+-- NaNs, 0 payload
+ddcps221 copysign NaN -34 -> -NaN
+ddcps222 copysign -NaN -34 -> -NaN
+ddcps223 copysign sNaN -34 -> -sNaN
+ddcps224 copysign -sNaN -34 -> -sNaN
+
+-- NaNs, non-0 payload
+ddcps231 copysign NaN10 -34 -> -NaN10
+ddcps232 copysign -NaN10 -34 -> -NaN10
+ddcps233 copysign sNaN10 -34 -> -sNaN10
+ddcps234 copysign -sNaN10 -34 -> -sNaN10
+ddcps235 copysign NaN7 -34 -> -NaN7
+ddcps236 copysign -NaN7 -34 -> -NaN7
+ddcps237 copysign sNaN101 -34 -> -sNaN101
+ddcps238 copysign -sNaN101 -34 -> -sNaN101
+
+-- finites
+ddcps301 copysign 7 -34 -> -7
+ddcps302 copysign -7 -34 -> -7
+ddcps303 copysign 75 -34 -> -75
+ddcps304 copysign -75 -34 -> -75
+ddcps305 copysign 7.50 -34 -> -7.50
+ddcps306 copysign -7.50 -34 -> -7.50
+ddcps307 copysign 7.500 -34 -> -7.500
+ddcps308 copysign -7.500 -34 -> -7.500
+
+-- zeros
+ddcps311 copysign 0 -34 -> -0
+ddcps312 copysign -0 -34 -> -0
+ddcps313 copysign 0E+4 -34 -> -0E+4
+ddcps314 copysign -0E+4 -34 -> -0E+4
+ddcps315 copysign 0.0000 -34 -> -0.0000
+ddcps316 copysign -0.0000 -34 -> -0.0000
+ddcps317 copysign 0E-141 -34 -> -0E-141
+ddcps318 copysign -0E-141 -34 -> -0E-141
+
+-- full coefficients, alternating bits
+ddcps321 copysign 2682682682682682 -34 -> -2682682682682682
+ddcps322 copysign -2682682682682682 -34 -> -2682682682682682
+ddcps323 copysign 1341341341341341 -34 -> -1341341341341341
+ddcps324 copysign -1341341341341341 -34 -> -1341341341341341
+
+-- Nmax, Nmin, Ntiny
+ddcps331 copysign 9.999999999999999E+384 -34 -> -9.999999999999999E+384
+ddcps332 copysign 1E-383 -34 -> -1E-383
+ddcps333 copysign 1.000000000000000E-383 -34 -> -1.000000000000000E-383
+ddcps334 copysign 1E-398 -34 -> -1E-398
+
+ddcps335 copysign -1E-398 -34 -> -1E-398
+ddcps336 copysign -1.000000000000000E-383 -34 -> -1.000000000000000E-383
+ddcps337 copysign -1E-383 -34 -> -1E-383
+ddcps338 copysign -9.999999999999999E+384 -34 -> -9.999999999999999E+384
+
+-- Other kinds of RHS
+ddcps401 copysign 701 -34 -> -701
+ddcps402 copysign -720 -34 -> -720
+ddcps403 copysign 701 -0 -> -701
+ddcps404 copysign -720 -0 -> -720
+ddcps405 copysign 701 +0 -> 701
+ddcps406 copysign -720 +0 -> 720
+ddcps407 copysign 701 +34 -> 701
+ddcps408 copysign -720 +34 -> 720
+
+ddcps413 copysign 701 -Inf -> -701
+ddcps414 copysign -720 -Inf -> -720
+ddcps415 copysign 701 +Inf -> 701
+ddcps416 copysign -720 +Inf -> 720
+
+ddcps420 copysign 701 -NaN -> -701
+ddcps421 copysign -720 -NaN -> -720
+ddcps422 copysign 701 +NaN -> 701
+ddcps423 copysign -720 +NaN -> 720
+ddcps425 copysign -720 +NaN8 -> 720
+
+ddcps426 copysign 701 -sNaN -> -701
+ddcps427 copysign -720 -sNaN -> -720
+ddcps428 copysign 701 +sNaN -> 701
+ddcps429 copysign -720 +sNaN -> 720
+ddcps430 copysign -720 +sNaN3 -> 720
+