在 2019/12/16 22:12, Liu Hao 写道: > 在 2019/12/16 17:49, Liu Hao 写道: > > This chart was wrong. It should look like follows, where each character > represents a bit: > > |---------Z---------| ; 53 bits > |------X1--Y1------| ; 52 bits > |-------X2--Y1------| ; 53 bits > |------X1--Y2-------| ; 53 bits > |-------X2--Y2-------| ; 54 bits <inexact> > ^ ^ > MSB ULP > (Bit 52) (Bit 0) > > Summing the result from top to bottom might cause a roundoff error at ULP.
I pushed this patch temporarily as it resolves the double-rounding problem. I hope someone would come up with a solution to this in the future. -- Best regards, LH_Mouse _______________________________________________ Mingw-w64-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
