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OS/2 Shareware BBS: 10 Tools
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10-Tools.zip
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fft32_a.zip
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README
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1995-01-21
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pcfft32.asm
pcfft32.obj
This is a 32 bit version of J.G.G. Dobbe's assembly language fft routines for
OS/2. (See the February 1995 edition of Dr. Dobb's Journal for the article on
fft's these came from.)
pcfft16.asm
pcfft16.obj
This is a slight modification of the original dos version of the code for use
with OS/2 16 bit c.
On my machine: an Epson equity 386/20 with a TI 486DLC-40 replacement processor
the 32 bit version of the code is approximately 15% faster than the 16 bit
version (running with MSC 5.1) This is not too much of a surprise since most of
the time is spent in the coprocessor - which runs at pretty much the same speed
in both 32 and 16 bit segments.
I am responsible for the 32 bit adaptation & modifying the 16 bit version so
that they would work with OS/2 compilers. To get the unmodified version (for
use with a 16 bit dos compiler) see the Dr. Dobb's forum on CompuServe (go DDJ)
The pcfft32.obj and pcfft16.obj files were produced with MASM 6.0 running under
OS/2.
These routines require an Intel style math coprocessor - 387 or above.
Bob Canup 73513,216