The comparison is between floating-point expressions that contain only integer values. float x = 0.0; for (x=0.0;x!=100.0;x+=1.0) { … if (random) break; } if (3*x+4==2*x-1) … if (3*x+4 == 1.3) One of the operands is0.0, unless you use the option flag-detect-bad-fl...
One floating-point comparison problem is that what you see is not exactly how your numbers are represented in memory. You can haveX := 99.9999964andY "= 100.000003numbers, which both are shown as 100 but they are not equal: usesSystem.SysUtils;varX,Y:Single;beginX:=99.9999964;Y:=100.000003...
It could have to do with the fact that doubles in C/C++ are 64bit, but computation could be done at higher precision (the floating point registers of your cpu are wider (96 bit), so that not even a statement like cos(x)==cos(x) could be true. Reference: http://www.parashift.co...
versions and NVCC compiler options that affect floating point calculations. InChapter 5we consider some issues regarding the comparison of CPU and GPU results. Finally, inChapter 6we conclude with concrete recommendations to programmers that deal with numeric issues relating to floating point on the ...
Floating point arithmetic comparison circuitdoi:US2965297 AAlrich John CUSUS2965297 * 1957年8月8日 1960年12月20日 Burroughs Corporation Floating point arithmetic comparison circuit
http://stackoverflow.com/questions/485175/is-it-safe-to-check-floating-point-values-for-equality-to-0-in-c-net It issafeto expect that the comparison will returntrueif and only if the double variable has a value of exactly0.0(which in your original code snippet is, of course, the case...
With the fixed precision of floating point numbers in computers there are additional considerations with absolute error. If the absolute error is too small for the numbers being compared then the epsilon comparison may have no effect, because the finite precision of the floats may not be able to...
http://stackoverflow.com/questions/485175/is-it-safe-to-check-floating-point-values-for-equality-to-0-in-c-net It issafeto expect that the comparison will returntrueif and only if the double variable has a value of exactly0.0(which in your original code snippet is, of course, the case...
Subject: [RISCV] Codegen support for floating point comparison operations This patch also includes extensive tests targeted at select and br+fcmp IR inputs. --- lib/Target/RISCV/RISCVISelLowering.cpp | 17 +- lib/Target/RISCV/RISCVInstrInfo.cpp | 19 +- lib/Target/RISCV/RISCV...
I am not sure how to check forNaNwithout including<math.h>. So to get an actual comparison, I believe you would have to do something like this: boolis_zero_point_five(doublenum) {// private union, used to get the// bitwise representation of the floatuniondouble_to_u32{uint64_tas_...