MIPS pr3900 floating point issue

MIPS pr3900 floating point issue

[alain.vitry]

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Hello, 

I use egcs-2.91.66 configured as a croos-compiler on a i386 host. I got the binary version, so didn't configured it myself.

I'm working with a PR3900 type MIPS core. Those core don't have a Floating Point Unit, nor floating point registers.
When using -msoft-float, I am supposed to use the libgcc soft floating point emulation. However, I cannot prevent gcc from using fp registers.
When looking at gcc specs:

$ mips-linux-gcc -dumpspecs | grep r3900
.
%{m3900:-mips1 -mcpu=r3900 -mfp32 -mgp32}...

The option -mfp32 is defined as the default, which means gcc assume 32 bit fp registers are available.

I am aware of two soft-float emulation libraries: Gofast and libgcc. However I can't figure out how emulation can be achieved if gcc keeps using fp registers. 

I must miss a command line option or a configuration flag, could someone help me with this matter ?

Thanks,
Alain
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NetCourrier, votre bureau virtuel sur Internet : Mail, Agenda, Clubs, Toolbar...
Une gamme d'outils gratuits et performants à votre service.
Web/Wap : www.netcourrier.com
Téléphone/Fax : 08 92 69 00 21 (0,34 E TTC/min - 2,21 F TTC/min)
Minitel: 3615 NETCOURRIER (0,15 E TTC/min - 1,00 F TTC/min)