12 Dec
2005
12 Dec
'05
3:40 p.m.
Eric J Korpela wrote:
On 8088, not 32-bit; see my previous message for timings. 64-bit, yes.
I was always a
little disappointed that the 8087 didn't speed up integer
math
any (FDIV was at least 193 cycles, whereas DIV is never more than 162)...
I
could have really used that.
It speeds up 32 bit and 64 bit integer math..... Even on newer processors it was floating point was
useful for many non-FP
things. Desipte intel's documentation to the contrary, the fastest block
transfer loop on the (pre-MMX) Pentium was done using FILDQ-FISTPQ.
Ah yes, I almost crapped a brick when I found that out!
--
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
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