c++ Programming Glossary: x87

http://stackoverflow.com/questions/11176990/opencl-floating-point-precision

of functional units that handle floating point numbers x87 FPU which operates with the much higher extended precision of.. does not assume that SSE is available and generates usual x87 FPU code to do the math. In this case operations like data i.. i data i is performed as follows data i is pushed onto the x87 FPU stack using the FLD DWORD PTR data i data i data i is computed..

Is < faster than <=? [closed]

http://stackoverflow.com/questions/12135518/is-faster-than

the clock period. Edit Floating Point This holds true for x87 floating point as well Pretty much same code as above but with..

Why doesn't (int)0.9999999999999999999728949456878623891498136799780L == 0 (possible GCC bug)?

http://stackoverflow.com/questions/16831464/why-doesnt-int0-9999999999999999999728949456878623891498136799780l-0-poss

which it is using. It seems that your implementation uses x87 style 80bit long double and is rounding to the nearest value..

Is there a standard sign function (signum, sgn) in C/C++?

http://stackoverflow.com/questions/1903954/is-there-a-standard-sign-function-signum-sgn-in-c-c

internal high precision representation e.g. 80 bit on x87 and avoid a premature round to zero. Caveats It's a template..

Usefulness of signaling NaN?

http://stackoverflow.com/questions/2247447/usefulness-of-signaling-nan

NaN I've recently read up quite a bit on IEEE 754 and the x87 architecture. I was thinking of using NaN as a missing value.. them. Here is a summary of what I know all of this using x87 and VC _EM_INVALID the IEEE invalid exception controls the behavior.. the IEEE invalid exception controls the behavior of the x87 when encountering NaNs If _EM_INVALID is masked the exception..

GCC problem with raw double type comparisons

http://stackoverflow.com/questions/2497825/gcc-problem-with-raw-double-type-comparisons

on the optimization settings suggests it might be the x87 extended precision messing with things as Michael Burr says..

Fast multiplication/division by 2 for floats and doubles (C/C++)

http://stackoverflow.com/questions/7720668/fast-multiplication-division-by-2-for-floats-and-doubles-c-c

eax fmul st st 1 fstp qword ptr esp eax 8 30h I knew the x87 FP stack was aweful but 500 times worse is kinda ridiculous... one op and storing from it but it's a good example for why x87 is not the way to go for anything perf. related. share improve..