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Re: gcc -mspe -misel


Kai Ruottu kirjoitti:
Most probably your compiler was not targeted to the right variant of PowerPC CPU... There are the 'generic', 'spe' and 'altivec' variants for PPC.
For instance the target name should be 'powerpc-eabispe' or 'powerpc-eabisimaltivec' instead of the generic 'powerpc-eabi', if wanting to produce
any code for the 'SPE' or 'e500' variant or for one of the Altivec types, or just wanting this code generation being the default. Older GCCs before
gcc-4.0 could require the target name being different for getting any code for the 'e500' type CPUs...
My guess was confirmed by the following clause from a year ago, seen on the 'gcc' maillist :

"As another secondary issue, I consider it a bug in the PowerPC back end that command-line options (like -misel) are silently ignored in the default
configuration."


written by Mark Mitchell, CodeSourcery, LLC, one of the GCC developers...


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