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From:	Rugxulo <rugxulo AT gmail DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: GCC 2.6.3 and Cygnus' -mfpflaw patch
Date:	Thu, 31 Dec 2009 10:39:59 -0800 (PST)
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Hi,

On Dec 28, 11:04=A0pm, Rugxulo <rugx DOT  DOT  DOT  AT gmail DOT com> wrote:
>
> Does anyone know anything about the Cygnus patch to GCC 2.6.3 to deal
> with the FDIV bug?

No responses? Bah. I know there's one guy around here with a buggy
Pentium (not counting CWS), but I forget his name. Didn't DJ used to
work for Cygnus? So he don't know nuthin'?  :-/

Long story short, I recompiled GCC 2.6.3, but the compiled .EXE for my
silly example seems to be the same whether using -mfpflaw or not.
Perhaps the changes were in libgcc.a (which BTW wasn't recompiled,
dunno why)??

Anyways, here's my stupid example .BAT just for testing (couldn't
figure out how to write a makefile using "ifeq" to test MAKE_VERSION
to use specific things for v1 ["3.71"] or v2).

Here's a download for ya:

http://rapidshare.com/files/328509374/586fdiv.zip.html
MD5: 70B3BCFAA011062D3490CC437586E327

(that .ZIP contains v1 and v2 .EXEs as well as the .BAT below)

I'm open to suggestions!! I don't have the hardware to test this
myself!! Is the Cygnus patch good for anything??

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
@echo off
if "%DJGPP%"=3D=3D"" goto end

set FDIV=3D586fdiv
set FDIVEXE=3D%FDIV%.exe
set MYGO32=3D\armslurp\djgpp.v1\bin\go32.exe
set GCCFLAGS=3D-s -O %1 %2 %3

if not "%1"=3D=3D"clean" goto begin
for %%a in (%FDIV% %FDIVEXE%) do if exist %%a del %%a
goto end

:begin
if exist %FDIV%.c goto compile
echo #include "stdio.h" >%FDIV%.c
echo int main() { >>%FDIV%.c
echo printf("\nCompiled by GCC %%d.%%d.x\n" >>%FDIV%.c
echo "\n4195835.0/3145727.0 =3D %%le\n" >>%FDIV%.c
echo "(Wrong would say 1.3337...)\n",__GNUC__,__GNUC_MINOR__, >>%FDIV
%.c
echo 4195835.0/3145727.0); >>%FDIV%.c
echo return 0;} >>%FDIV%.c

:compile
REM **************************************************
ls /dev/env/DJDIR/bin/djsplit.exe
cls
if errorlevel 1 set GCCFLAGS=3D%GCCFLAGS% -mfpflaw
REM **************************************************

if not exist %FDIV%.c goto end
echo on
gcc %GCCFLAGS% %FDIV%.c -o %FDIV%
@echo off

if not exist go32.exe if not exist %FDIVEXE% copy /b %MYGO32% . >NUL
if exist go32.e* if not exist %FDIVEXE% copy /b go32.e*+%FDIV% %FDIVEXE
% >NUL
if exist %FDIVEXE% upx -qqq --best --lzma %FDIVEXE%
if not exist go32.exe stubit %FDIVEXE% >NUL
if exist go32.exe ren %FDIVEXE% fdiv-dj1.exe
if not exist go32.exe ren %FDIVEXE% fdiv-dj2.exe
for %%a in (fdiv-dj?.exe) do call %%a

:end
if exist %MYGO32% if exist go32.exe del go32.exe
for %%a in (%FDIV% 586fdiv.c 586fdiv.bak) do if exist %%a del %%a
for %%a in (GCCFLAGS FDIV FDIVEXE MYGO32) do set %%a=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

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