Benchmarking the SGI: Floating point faster than integer?
James Helman
jim at baroque.Stanford.EDU
Wed Sep 12 06:51:29 AEST 1990
[repost, original apparently lost in NNTP land]
The program is a rather extreme benchmark. A more balanced program
representative of your application would make more sense as a
purchasing critereon.
But if you want raw multiplication speeds, each of the FORTRAN
multiplies is actually two loads, a multiply and a store. If you edit
the assembly code to discount the loads and stores by repeating the
mul instruction N times, the FP multiply is actually 3X faster than
the integer!!!
Jim Helman
Department of Applied Physics Durand 012
Stanford University FAX: (415) 725-3377
(jim at KAOS.stanford.edu) Work: (415) 723-9127
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