experimental simd PPC fails without VSX?

[Iain Sandoe]

Hi Folks,

on powerpc-darwin9 (m64) ...

FAIL: experimental/simd/standard_abi_usable.cc -maltivec -O2 -Wno-psabi  
(test for excess errors)
FAIL: experimental/simd/standard_abi_usable_2.cc -maltivec -O2 -Wno-psabi  
(test for excess errors)

It seems that testing __ALTIVEC__ is not sufficient, since the tests need  
an ISA that supports double ops?

I’m not sure if the conditions need amending, or if the simd suite is just  
unusable on a machine with only support for 32b float/int vector ops?

(depending on the answer to that, we need to figure out the amendment, or  
skip the suite for < power7)

thanks
Iain