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CT60 and related things BBS
| FPU emul on CT60 |
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Posted by: guillaume tello
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Feb,17.2011-13:30
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Hi!
After some work with POV I saw that this program runs much slower under TOS than under Mint!
I searched for an explanation and I think I have it:
- no difference on a TT between TOS and Mint because of the 68882.
- no difference with system calls because during "rendering" (the calculation under POV) there are no system calls.
So I wrote another little program that heavily uses the FPU and found the difference!
With Arithmetic functions, same time (+,-,*,/,sqr)
WIth scientific computations, 5 times slower !!! (sin, cos, atn, exp...)
On a 68060 those last functions are emulated by software. So, the soft part under TOS is 5 times slower than under Mint !!!
You can see the results of this test at:
http://gtello.pagesperso-orange.fr/kronos_soft.htm
(test 5, bottome of the page)
Who can help having a good maths library under TOS ??
Guillaume.
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