cvs commit: src/lib/msun/src e_hypot.c e_hypotf.c

[Bruce Evans]

bde         2008-03-30 17:28:27 UTC

  FreeBSD src repository

  Modified files:
    lib/msun/src         e_hypot.c e_hypotf.c 
  Log:
  Use the expression fabs(x+0.0)-fabs(y+0.0) instead of
                     fabs(x+0.0)+fabs(y+0.0) when mixing NaNs.  This improves
  consistency of the result by making it harder for the compiler to reorder
  the operands.  (FP addition is not necessarily commutative because the
  order of operands makes a difference on some machines iff the operands are
  both NaNs.)
  
  Revision  Changes    Path
  1.11      +1 -1      src/lib/msun/src/e_hypot.c
  1.12      +1 -1      src/lib/msun/src/e_hypotf.c