On Wed, 9 Feb 2005, Vincent Lefevre wrote: > There are no reasons not to fix it. For those who fear a performance The x86 back-end needs changing so it no longer pretends that x87 floating point operates other than on "long double". The front ends need to model excess precision explicitly so that they can handle an expression of type "double" being represented as long double and a cast from double to double removing excess precision; even -ffloat-store only deals with assignment, not casts, and I don't know whether precision will be discarded properly by function call and return either. Then the front ends need some way of representing the present vague semantics for -ffast-math when down-conversions to double on assignment aren't required. -- Joseph S. Myers http://www.srcf.ucam.org/~jsm28/gcc/ jsm@xxxxxxxxxxxxxxxx (personal mail) joseph@xxxxxxxxxxxxxxxx (CodeSourcery mail) jsm28@xxxxxxxxxxx (Bugzilla assignments and CCs)
