MPC8572 Compiler problem.

[dmitrshard]

Hello, everyone!

I have trouble with MPC8572DS board. I make bareboard application (.elf). I use powerpc-linux-gnu compiler. Trouble is with floating-point instructions. In my bareboard application i use unsigned long long numbers and compiler makes

lfd	f0,16(r31)

stfd

f0,8(r9)

instructions wich write in floating-point registers but MPC8572DS havent floating-point registers. I know about MSR[SPE] bit.

What compiler flags or compiler i need to use to avoid this error.

Thanks.

[marius_grigoras]

Hi,

You can make a try also using CW and using the default bare-metal toolchain from our PA compiler (not gcc based).

Regards,

Marius

[bpe]

The following options are used by QorIQ SDK for e500v2 based processors:

-mcpu=8548 -mabi=spe -mspe -mfloat-gprs=double

For more information on available registers refer to E500CORERM, Section 2.2

Have a great day,
Platon

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