double-double trouble

[TimoVJL]

This site offers a double-double library
https://www.davidhbailey.com/dhbsoftware/

but with asmc it should be able to create a library for 128 bit float ?

[jack]

Hi TimoVJL
some years ago I did some fiddling with double-double/quad-double and compared it with soft-float http://www.jhauser.us/arithmetic/SoftFloat.html
at the time of my tests I found that soft-float was quite a bit faster but with soft-float you have to write your own elementary transcendental functions, I adapted some of 128-bit transcendental functions from http://www.moshier.net/ to FreeBasic, but after a while I got bored
for input/output I used ioldoubl.c from http://www.moshier.net/smldbl12.zip and gdtoa from https://www.netlib.org/fp/

[nidud]

Asmc use __float128 internally so that is included in LIBC. There is also a standalone
library (using the same source) for Win 32/64 and Linux.

quadmath.inc

See also:
Large integers and floats

[TimoVJL]

Thanks nidud