3 ms·
I've read this a few places recently but I can't figure out how? https://godbolt.org/z/Mbjs73qar https://godbolt.org/z/Mbjs73qar -- using doubles I get AVX inst
by andrewf 3y ago
I've read this a few places recently but I can't figure out how? https://godbolt.org/z/Mbjs73qar https://godbolt.org/z/Mbjs73qar -- using doubles I get AVX instructions but using 128-bit floats calls some very hefty runtime support functions.
- gpderetta 3y agoThere is no true quad support on x86. GCC implements double-double quads[1] via software emulation on many targets. [1] https://en.wikipedia.org/wiki/Quadruple-precision_floating-point_format#Double-double_arithmetic https://en.wikipedia.org/wiki/Quadruple-precision_floating-p...