Hi guys, 2015-10-22 12:54 GMT+02:00 Martell Malone <[email protected]>: > Hi guys, > > Can someone confirm the format of long double for the x86_x64 target of > mingw-w64. > > Under i686 it is x87 80 bit precision > But under x86_64?
It is also 80 bit precision. We kept it the same as for linux x86_64 targets.In general this is already an extension of x64 ABI, as for the MS' compiler 'long double' has just 64-bit precision. > Is it sse2 128 or 80 bit or is it still x87 We use for 80 bit still x87 opcodes. Indeed it could be an improvement to use a soft-emu using sse2 instructions and just down-scale to 80-bit precision from it. At least for x86_64 this might be indeed a speed-improvement in some cases. > Kind regards > Martell Regards, Kai ------------------------------------------------------------------------------ _______________________________________________ Mingw-w64-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
