Fix #79595: zend_init_fpu() alters FPU precision

On startup, PHP deliberately changes the floating point control word to
enforce binary64 format for the calculations for best consistency
across platforms.  However, this is unnessary for x86_64 architectures,
because in this case SSE instructions are used by default, and there is
no good reason to pass `-mfpmath=i387` or such.

Therefore, we can skip the modification, which has the benefit that
system libraries are free to work in the mode of their liking.

0 files changed, 0 insertions, 0 deletions