[comp.arch] Performance increase - a suggestion really RISC FP

mash@mips.COM (John Mashey) (01/31/88)

In article <3127@phri.UUCP> roy@phri.UUCP (Roy Smith) writes:
>In article <28200089@ccvaxa> aglew@ccvaxa.UUCP writes:
>> I wonder how much interest might be out there for a true double-precision
>> floating point engine ....

>	Actually, I wonder if a RISC-FPP would make sense....

Made a lot of sense to us.  MIPS R2010 FPU is a single-chip RISC (+-*/, no
transcendentals) FPU, optimized heavily to make the most frequent operations go
fast in double precision.  The cycle counts are:

		SP	DP
Add/Sub		 2	 2
Multiply	 4	 5
Divide		12	19


-- 
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