Decimal Testcases, version 2.44 Copyright (c) IBM Corporation, 2009. All rights reserved. ©	7 Apr 2009
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Appendix A – Changes

This appendix lists changes since the first public draft of this document.

Changes in Draft 0.18 (13 July 2001)

Two new testcase groups, randomDouble and randomSingle, have been added.
Minor corrections and clarifications have been made.

Changes in Draft 0.20 (25 September 2001)

The rounding testcase group now includes tests for the ceiling and floor modes.

Changes in Version 1.00 (21 November 2001)

The specification has been enhanced to include tests for extended value arithmetic (including subnormal values and values such as NaN and Infinity). In particular:

A new version directive has been added to allow a formal version number to be indicated.
A new extended directive controls the extended-values setting.
Operands and results with extended values are now possible.
A new operation, integer (round-to-integer) has been added.
Three new testcase groups, extend, integer, and randomBound32, have been added.

Changes in Version 1.02 (30 November 2001)

A new operation, remaindernear (IEEE remainder) has been added, together with a testcase group of the same name.
Some underflow and overflow exception results and conditions have been corrected.

Changes in Version 1.03 (20 March 2002)

Three new operations and testcase groups (abs, max, and min) have been added.
Corrected the description of the maxexponent directive; a value of zero is permitted.

Changes in Version 2.01 (3 July 2002)

This version marks a major update of the testcases to match the new combined arithmetic specification. The underlying syntax, etc., of the testcases is unchanged, but specific changes include:

Each testcase group has been split into two groups, one with the extended directive set to 1 and the other with it set to 0.
One new operation and (pair of) testcase groups (trim) has been added.
The extended testcase group has been removed and its testcases incorporated into other groups.

Changes in Version 2.06 (1 September 2002)

This version incorporates updates to testcases for subnormal numbers (previous testcases included subnormals which were more precise than allowed by IEEE 754), and also adds testcases for rounding to-number conversions. The subnormal condition has been added, and subnormal numbers may be rounded and/or inexact (in the latter case, underflow is raised).

In this document:

The subnormal condition has been added.
The conversion underflow and conversion overflow conditions have been removed (these conditions now raise underflow or overflow, respectively).
The operand to the toSci and toEng operations is now subject to rounding.
Minor clarifications have been added.

Changes in Version 2.09 (8 October 2002)

The normalize and squareroot operations and testcase groups have been added.
Extended tests now admit unrounded long operands without input rounding; the Lost_digits condition can therefore only occur when extended is 0.
Three cases in remaindernear.decTest which should have produced Division_impossible, but did not, have been corrected (and extra tests have been added).

Changes in Version 2.19 (21 February 2003)

The testcase groups are now separated into two .zip files, one for extended operations and the other for subset arithmetic.
The default setting for the extended directive is now 1.
A new required directive, minexponent, has been added.
A new condition, clamped, has been added.
Hexadecimal representation notations have been added, in preparation for the new decimal32, decimal64, and decimal128 testcase groups which have replaced the old single and double format groups.

Changes in Version 2.21 (3 March 2003)

A new directive, clamp, allows testing of clamped operations without requiring a specific concrete format.
A new testcase group, clamp, has been added.
A new operator, apply has been added. This works like toSci and toEng except that the result does not have to be in one of the strict canonical formats.

Changes in Version 2.25 (13 June 2003)

The quantize operation and testcase group have been added.

Changes in Version 2.27 (23 July 2003)

The integer (round-to-integer) operation has been replaced by the tointegral (round-to-integral-value) operation. The latter implements the IEEE 754-2008 operation (no Inexact flag, etc.).

Changes in Version 2.31 (29 August 2003)

The samequantum operation and testcase group have been added.

Changes in Version 2.35 (27 November 2005)

The exp, ln, and log10 operations and testcase groups have been added.
The power testcase group has been greatly extended, to cover non-integer second operands, and the powersqrt testcase group has been added.

Changes in Version 2.36 (28 April 2006)

The comparetotal operation and testcase group has been added; this operation compares two numbers using IEEE 754-2008 total ordering.

Changes in Version 2.38 (16 March 2007)

Testcases may now have up to three operands (for fma).
The following operations and testcase groups have been added:and, canonical, class, comparesig, comparetotmag, copy, copyabs, copynegate, copysign, fma, invert, logb, maxmag, minmag, nextminus, nextplus, nexttoward, or, rotate, scaleb, shift, tointegralx, xor.

Changes in Version 2.40 (22 May 2007)

Testcase groups that test only using the precisions and ranges of the three decimal formats in the IEEE 754-2008 standard have been added. These are grouped under the names decSingle, decDouble, and decQuad, where each includes further groups whose names are prefixed with ds, dd, and dq respectively. There are nearly 30,000 testcases in these new groups.
The decimal32, decimal64, and decimal128 groups have been renamed to dsEncode, ddEncode and dqEncode respectively, to match the naming scheme for the other fixed-size testcases.
A new rounding mode has been added: 05up (‘round for re-reound’, where only 0 and 5 might be rounded up; other last-place digits round down).
The normalize operation and testcase group has been renamed reduce to avoid confusion.

Changes in Version 2.43 (29 Jul 2008)

References to IEEE 854 and the old IEEE 754 standard have been removed and/or changed to refer to IEEE 754-2008, and specific URLs for the General Decimal Arithmetic site have been removed.

Also, all references to the General Decimal Arithmetic website have been updated to http://speleotrove.com/decimal (its new location).

Changes in Version 2.44 (24 Mar 2009)

The document is now formatted using OpenOffice (generated from GML), for improved PDF files with bookmarks, hot links, etc. There are no technical changes.

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