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| <TITLE>Berkeley TestFloat History</TITLE> |
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| <H1>History of Berkeley TestFloat, to Release 3</H1> |
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| <P> |
| John R. Hauser<BR> |
| 2015 February 16<BR> |
| </P> |
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| <P> |
| Releases of Berkeley TestFloat normally parallel those of Berkeley SoftFloat, |
| on which TestFloat is based. |
| Each TestFloat release necessarily incorporates all bug fixes from the |
| corresponding release of SoftFloat. |
| </P> |
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| <H3>Release 3 (2015 February)</H3> |
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| <UL> |
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| <LI> |
| Complete rewrite, funded by the University of California, Berkeley, and |
| consequently having a different use license than earlier releases. |
| Visible changes included different names for testable functions and command |
| options. |
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| <LI> |
| Reinstated separate programs for generating test cases |
| (<CODE>testfloat_ver</CODE>) and verifying test results |
| (<CODE>testfloat_gen</CODE>), as alternatives to the all-in-one |
| <CODE>testfloat</CODE> program (which remained supported). |
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| <LI> |
| Added support for testing conversions between floating-point and unsigned |
| integers, both <NOBR>32-bit</NOBR> and <NOBR>64-bit</NOBR>. |
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| <LI> |
| Added support for testing a fused multiply-add operation, for all testable |
| floating-point formats except <NOBR>80-bit</NOBR> double-extended-precision. |
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| <LI> |
| Added support for testing a fifth rounding mode, <CODE>near_maxMag</CODE> |
| (round to nearest, with ties to maximum magnitude, away from zero). |
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| <LI> |
| Added <CODE>timesoftfloat</CODE> (previously found in the Berkeley SoftFloat |
| package). |
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| </UL> |
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| <H3>Release 2c (2015 January)</H3> |
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| <UL> |
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| <LI> |
| Fixed mistakes affecting some <NOBR>64-bit</NOBR> processors. |
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| <LI> |
| Made minor updates to the documentation, including improved wording for the |
| legal restrictions on using TestFloat releases <NOBR>through 2c</NOBR> (not |
| applicable to <NOBR>Release 3</NOBR> or later). |
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| </UL> |
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| <P> |
| There was never a <NOBR>Release 2b</NOBR>. |
| </P> |
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| <H3>Release 2a (1998 December)</H3> |
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| <UL> |
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| <LI> |
| Added support for testing conversions between floating-point and |
| <NOBR>64-bit</NOBR> signed integers. |
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| <LI> |
| Improved the Makefiles. |
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| </UL> |
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| <H3>Release 2 (1997 June)</H3> |
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| <UL> |
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| <LI> |
| Integrated the generation of test cases and the checking of system results into |
| a single program. |
| (Before they were separate programs, normally joined by explicit command-line |
| pipes.) |
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| <LI> |
| Improved the sequence of test cases. |
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| <LI> |
| Added support for testing <NOBR>80-bit</NOBR> double-extended-precision and |
| <NOBR>128-bit</NOBR> quadruple precision. |
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| <LI> |
| Made program output more readable, and added new command arguments. |
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| <LI> |
| Reduced dependence on the quality of the standard <CODE>rand</CODE> function |
| for generating test cases. |
| (Previously naively expected <CODE>rand</CODE> to be able to generate good |
| random bits for the entire machine word width.) |
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| <LI> |
| Created <CODE>testsoftfloat</CODE>, with its own simpler complete software |
| floating-point (“slowfloat”) for comparison purposes. |
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| <LI> |
| Made some changes to the source file structure, including renaming |
| <CODE>environment.h</CODE> to <CODE>milieu.h</CODE> (to avoid confusion with |
| environment variables). |
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| </UL> |
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| <H3>Release 1a (1996 July)</H3> |
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| <UL> |
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| <LI> |
| Added the <CODE>-tininessbefore</CODE> and <CODE>-tininessafter</CODE> options |
| to control whether tininess should be detected before or after rounding. |
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| </UL> |
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| <H3>Release 1 (1996 July)</H3> |
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| <UL> |
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| <LI> |
| Original release. |
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| </UL> |
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| </BODY> |
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