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"Состоялся релиз системной библиотеки Glibc 2.22" Отправлено Аноним, 16-Авг-15 04:15
> Типа модно, молодежно? asm volatile ("fsin") уже не катит. Ну, к сожалению, не все такие профи и в курсе всяких мелких нюансов, типа https://software.intel.com/blogs/2014/10/09/fsin-documentati... > As an example, let us consider a double precision argument x that is as close as possible to the > mathematical value of ∏, i.e. x is the best 53-bit approximation of ∏. In FSIN, this argument is reduced by > subtracting the 66-bit approximation PI of ∏ from it, which means that the reduced argument has only 13 > bits that are correct. The reduced argument is also very small, and sin(x-PI) ≈ FSIN(x-PI) ≈ x-PI has also only > around 13 bits that are correct. This means that the ulp error can be of the order of 2^40 ≈ 10^12  ulps in this case.