If I compile my Microblaze project for Virtex2pro, the compiler uses the mul instruction (hw multiplier) as expected. If I only change to Spartan3e and recompile, the compiler uses __mulsi3 (sw multiplier).
Why won't it use the hw multiplier in Spartan3e?
I am using ISE 7.1sp4, EDK 7.1.2, xc2vp4, xc3s250e
Alan Nishjioka snipped-for-privacy@nishioka.com
Never mind. I just noticed a missing -mno-xl-soft-mul flag from the Spartan3e compile. I think it is a bug in EDK that it is missing from the EDK generated command, however.
Alan Nishioka
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