audk/StdLib/LibC/Softfloat/softfloat-history.txt

$NetBSD: softfloat-history.txt,v 1.1 2000/06/06 08:15:08 bjh21 Exp $

History of Major Changes to SoftFloat, up to Release 2a

John R. Hauser
1998 December 16


- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Release 2a (1998 December)

-- Added functions to convert between 64-bit integers (int64) and all
   supported floating-point formats.

-- Fixed a bug in all 64-bit-version square root functions except
   `float32_sqrt' that caused the result sometimes to be off by 1 unit in
   the last place (1 ulp) from what it should be.  (Bug discovered by Paul
   Donahue.)

-- Improved the makefiles.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Release 2 (1997 June)

-- Created the 64-bit (bits64) version, adding the floatx80 and float128
   formats.

-- Changed the source directory structure, splitting the sources into a
   `bits32' and a `bits64' version.  Renamed `environment.h' to `milieu.h'
   (to avoid confusion with environment variables).

-- Fixed a small error that caused `float64_round_to_int' often to round the
   wrong way in nearest/even mode when the operand was between 2^20 and 2^21
   and halfway between two integers.

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Release 1a (1996 July)

-- Corrected a mistake that caused borderline underflow cases not to raise
   the underflow flag when they should have.  (Problem reported by Doug
   Priest.)

-- Added the `float_detect_tininess' variable to control whether tininess is
   detected before or after rounding.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Release 1 (1996 July)

-- Original release.

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StdLib/LibC: Add software floating point library from NetBSD Floating point processing is not supported on ARM for UEFI. In order to support UEFI applications in AppPkg we use this library to provide the required functionality. Changes as compared to the NetBSD version: - Formatting changes (tabs to spaces, DOS line endings etc). - Disable exceptions as described in the float_raise() function. - Disable definition of 'Symbolic Boolean literals' in milieu.h. Source originally from: NetBSD project - Source: http://cvsweb.netbsd.org/bsdweb.cgi/?only_with_tag=MAIN - Licensing and Copyright: http://www.netbsd.org/about/redistribution.html Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Harry Liebel <Harry.Liebel@arm.com> Reviewed-by: Olivier Martin <Olivier.Martin@arm.com> Reviewed-by: Daryl McDaniel <edk2-lists@mc2research.org> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18116 6f19259b-4bc3-4df7-8a09-765794883524 2015-07-30 11:50:51 +02:00			$NetBSD: softfloat-history.txt,v 1.1 2000/06/06 08:15:08 bjh21 Exp $

			`History of Major Changes to SoftFloat, up to Release 2a`

			`John R. Hauser`
			`1998 December 16`


			`- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
			`Release 2a (1998 December)`

			`-- Added functions to convert between 64-bit integers (int64) and all`
			`supported floating-point formats.`

			`-- Fixed a bug in all 64-bit-version square root functions except`
			`float32_sqrt' that caused the result sometimes to be off by 1 unit in
			`the last place (1 ulp) from what it should be. (Bug discovered by Paul`
			`Donahue.)`

			`-- Improved the makefiles.`

			`- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
			`Release 2 (1997 June)`

			`-- Created the 64-bit (bits64) version, adding the floatx80 and float128`
			`formats.`

			`-- Changed the source directory structure, splitting the sources into a`
			`bits32' and a `bits64' version. Renamed `environment.h' to `milieu.h'
			`(to avoid confusion with environment variables).`

			-- Fixed a small error that caused `float64_round_to_int' often to round the
			`wrong way in nearest/even mode when the operand was between 2^20 and 2^21`
			`and halfway between two integers.`

			`- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
			`Release 1a (1996 July)`

			`-- Corrected a mistake that caused borderline underflow cases not to raise`
			`the underflow flag when they should have. (Problem reported by Doug`
			`Priest.)`

			-- Added the `float_detect_tininess' variable to control whether tininess is
			`detected before or after rounding.`

			`- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`
			`Release 1 (1996 July)`

			`-- Original release.`

			`- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -`