Adhemerval Zanella 08cee2a464 powerpc: Fix fsqrt build in libm [BZ#16576] ...

Some powerpc64 processors (e5500 core for instance) does not provide the
fsqrt instruction, however current check to use in math_private.h is
__WORDSIZE and _ARCH_PWR4 (ISA 2.02).  This is patch change it to use
the compiler flag _ARCH_PPCSQ (which is the same condition GCC uses to
decide whether to generate fsqrt instruction).

It fixes BZ#16576.

2015-01-28 05:59:16 -05:00

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