Experimental Physics and
Industrial Control System

Johnny Tang <[email protected]> · Thu, 22 Aug 96 16:47:39 EDT

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Mailer: Elm [revision: 70.85]

Gabor wrote:
> I'm working on dbStaticLib.c modification and this is 
> now working on PC (!) (R3.13.alphaX) and R3.12.2.D but only 
> on processors which has FP. I have discussed with Matthias,
> and he told me, that the hack we have on LC board startup scripts:
> --
> # hack gnu fp-soft library error
> ___fixunssfsi = 0x800000
> --
>  
> is not enought - he has red something from you. Could you help me ?
> Regards, 
> 
> Gabor

To compile EPICS or vxWorks applications to be run on 68LC040 or
68EC040 (mv162 without hardware floating support), -msoft-float
flag must be used with cc68k cross compiler and that flag must
come AFTER "-m68040" on the cc68k command line.

If you are using 5.1.1 or earlier version of vxWorks mv162lc BSP,
you do need fix libMC68040gnuvx.a library. The hack gnu fp-soft
library with " ___fixunssfsi = 0x800000 " is only hoping that
there will be no actually calls to ___fixunssfsi in your
vxWorks applications or EPICS in your case.

I recommend you to use vxWorks 5.2 or 5.3 vxWorks. If for some reasons
you really want to use 5.1.1 and try to fix gnu soft-fp library,
you may use the following procedure as a reference:

Delete the following modules in libMC68040gnuvx.a :
gccUss040Alib pow fmod support log__L exp__E

Extract the following modules in libMC68020gnuvx.a and add
them into libMC68040gnuvx.a:
floatLib shell shellLib gccMathLib mathSoftALib
gccUssALib uss_dpfncs uss_dpopns uss_fpfncs uss_fpopns
uss_xlfncs modf frexp ldexp

ar68k -d libMC68040gnuvx.a <del-module>
ar68k -x libMC68020gnuvx.a <extract-module>
ar68k -r libMC68040gnuvx.a <add-module>

Hope it helps,

Johnny Tang

--
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Johnny Tang     Voice: (804)249-7239  E-Mail: [email protected]
Jefferson Lab
Continuous Electron Beam Accelerator Facility
12000 Jefferson Avenue, MS 85A
Newport News, Virginia 23606
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System