[ros-dev] [ros-diffs] [jimtabor] 33830: Move xform data from W structure into DcLevel within unions.

[James Tabor]

Hi,

I'm going to explain this ONCE:

1st: The move was to conserve and reduce space and size of the current
structure.


Writing a floating point package could be hard to do or just copyleft
one off the net.... Problem is if we do the later it will most likely
not be compatible with M$ SFPP. BTW, M$ did patent their strange and
unusual floating point package. Which means I can not write one! Just
writing the storage emulation is almost a problem too... But due to US
patent law I can just do what I did, to "Talk to the Interface" with
the storage emulation.

Keeping the current state of ReactOS FP is my first choice. We use the
speed of the FPU which is part of the main processor and reduce the
size of the source. (Two pluses so far, Speed and Small Size.) The
storage emulation for gdi32 is important for compatibility and with
ReactOS concept of drop in replacement and play.

Thanks,
my 1EU


References:

Fast floating-point truncation to integer form - US Patent 6535898:
http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=US6535898&F=0

Use of indices for queries with comparisons based on a function:
http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=EP1193619&F=0

System and method for fast and smooth rendering of lit, textured spheres:
http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=EP1227443&F=0

John R. Hauser  SoftFloat  package :
http://www.jhauser.us/arithmetic/SoftFloat.html

IEEE 754 floating-point test software:
http://www.math.utah.edu/~beebe/software/ieee/