tree cd0173a02590ead4fe7064a9b8f6ebf12a341ec5
parent f5091eee4abe73c64959e53bda684bd689569643
author Serguei Katkov <serguei.i.katkov@intel.com> 1429511372 +0600
committer Serguei Katkov <serguei.i.katkov@intel.com> 1429552036 +0600

Incorrect transformation of (sub,neg) to (sub) for fp

A pair (sub,neg) should not be transformed to (sub) for
floating point operations, otherwise we can lose the sign of
zero for instructions like this:
  - (A - B) != B - A if B == A

Change-Id: I4d612612d4dc0a067fac5721ad206f74168bcd36
Signed-off-by: Serguei Katkov <serguei.i.katkov@intel.com>