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Benchmark results for Weitek coprocessors
Since neither a Weitek coprocessor nor a compiler that generates code for the Weitek chips were available,
performance data for the Weitek Abacus is given here according to Weitek documents and scaled to show
performance of a 33 MHz system. The benchmarks were compiled using highly-optimizing 32-bit compilers.
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Single Precision |
Double Precision |
Double Precision |
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3167 |
4167 |
3167 |
4167 |
387 |
487 |
| Linpack MFLOPS |
1.8 |
5.0 |
0.8 |
3.2 |
0.4 |
1.6 |
| Whetstone kWhet/sec |
7470 |
22700 |
4900 |
14000 |
3290 |
12300 |
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Note that for the Intel coprocessors, running programs in single vs. double-precision doesn't provide much
of an performance advantage since all internal calculations are always done in extended precision. Using Weitek
coprocessors, however, performance nearly doubles in single-precision mode. For double-precision calculations
using only basic arithmetic, the Weitek Abacus can at most provide performance at twice the level of the respective
Intel coprocessor (387/486) at the same clock speed.
Comparison of floating-point performance
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Single Precision |
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Weitek 4167-33 |
intel 486DX-33 |
intel 486DX2-66 |
| Linpack MFLOPS |
5.0 |
1.8 |
3.5 |
| Whetstones kWhet/sec |
22700 |
12700 |
25500 |
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Double Precision |
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Weitek 4167-33 |
intel 486DX-33 |
intel 486DX2-66 |
| Linpack MFLOPS |
3.5 |
1.6 |
3.1 |
| Whetstones kWhet/sec |
14000 |
12300 |
24700 |
Information © Norbert Juffa, Karlsruhe, Germany [excerpt of COPRO16A.TXT]
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