tree bd6f4940d3f2b9cf238c3bed80f1343aa71e265a
parent 42f7c78fe39d64546ee1d1b19d6657c56fb10ee7
author DRC <information@libjpeg-turbo.org> 1605559095 -0600
committer DRC <information@libjpeg-turbo.org> 1605561582 -0600

Build: Set FLOATTEST more intelligently

The "32bit" vs. "64bit" floating point test results actually have
nothing to do with the FPU.  That was a fallacious assumption based on
the observation that, with multiple CPU types, 32-bit and 64-bit builds
produce different floating point test results.  It seems that this is,
in fact, due to differing compiler behavior-- more specifically, whether
fused multiply-add (FMA) instructions are used to combine multiple
floating point operations into a single instruction ("floating point
expression contraction".)  GCC does this by default if the target
supports FMA instructions, which PowerPC and AArch64 targets both do.

Fixes #468