28 Mar
2016
28 Mar
'16
7:26 a.m.
From: Charles Anthony
the missing piece of the rounding algorithim has been
identified:
Only round if the mantissa was shifted more then 71 bits.
Wow. I'm really impressed that they implemented that in hardware, back then!
Then again, they threw so many gates at the Multics CPU, I guess they figured
a few more wouldn't matter... ;-)
Noel
28 Mar
28 Mar
8:32 a.m.
On Mon, Mar 28, 2016 at 7:26 AM, Noel Chiappa <jnc at mercury.lcs.mit.edu wrote:
The floating point actually predates Multics (GE-635 I believe); I suspect
that the driving force for sophisticated floating point was the growing
'scientific computing' market, remember this was Cold War era and the
military was spending piles of money on nuclear weapon research. (I don't
have any documentation, just my informal understanding of mainframe
history.)
-- Charles
Noel
From: Charles
Anthony
the missing piece of the rounding algorithim has
been identified:
Only round if the mantissa was shifted more then 71 bits.
Wow. I'm really impressed that they implemented that in hardware, back
then!
Then again, they threw so many gates at the Multics CPU, I guess they
figured
a few more wouldn't matter... ;-)
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