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- Re: Disadvanteges of Windowed Register File (like Am29k)
On Thu, 02 Sep 2010 23:15:18 +0200, Terje Mathisen <"terje.mathisen at
Could you tell me why this is such a desirable feature? It is somewhat
counter-intuitive (at least to my intuition) as dividing a number
continually by (any power of) 2 doesn't give a zero at the end; it
also offends adaptive filters as this is what they seem to expect. I
- Re: Disadvanteges of Windowed Register File (like Am29k)
In article <ggtgp-AFF78F.01514102092...@n ews.isp.giganews.com>,
I read the SPARC programmers manual, the FPU is not a kludge,
just stupid, par for the course for a company that picked register
windows.
You get 16 Double Precision registers, or 32 singles, or 8 quads.
Penny wise, pound foolish, completely stupid.
- Re: Fans could generate electricity and damage motherboard ?
He's said as much. It's DimBulb who won't admit to the obvious.
- Re: Fans could generate electricity and damage motherboard ?
Yes, thank Christ no one has mentioned that.
- Re: Fans could generate electricity and damage motherboard ?
Skybuck Flying, you have ASPERGERS don't you?
- Re: Disadvanteges of Windowed Register File (like Am29k)
Although I haven't gone and looked for this patent, if it exists I
imagine that it is not on having such an instruction, but, rather, on
having both the traditional arithmetic right shift for 2'scomplement,
and this instruction.
I.e. having both a A >> n
where one version produces floor(A/2^n) and the other produces
- Re: Disadvanteges of Windowed Register File (like Am29k)
[link]
''The company is accelerating a 300-mm capacity expansion in
all three fabs, increasing 300-mm capacity from about 50 kwspm
currently to over 100 kwspm by 4Q '11. The shell of its New York
Fab 8 will be completed by the end of this month, and we believe
- Re: Fans could generate electricity and damage motherboard ?
A motor can act as a generator.
BTW, I used to have a computer running without a case. It worked OK,
although I had to cover it when the dog was inside (the dog had
overactive salivary glands, like 2 dog-food-filled icicles hanging from
the corners of his mouth).
[snip]
- Re: Disadvanteges of Windowed Register File (like Am29k)
On 03/09/2010 02:50, in article
9YWdnVGCqfzRyR3RnZ2dnUVZ_gqdn. ..@giganews.com, "Andy Glew" <"newsgroup at
KDF9's shift-right-arithmetic instruction was specified to correctly round
the result, ca 1960.
- Re: Disadvanteges of Windowed Register File (like Am29k)
IMHO it would be stupid to change the definition of arithmetic right
shift on 2's complement machines at this point in time. It will cause
code that works correctly now to break.
However, it is reasonable to provide a shift instruction that does what
Mitch wants. Blaine Gaither wanted such a Divide by 2^n instruction at
- Re: Disadvanteges of Windowed Register File (like Am29k)
yes.
- Re: Disadvanteges of Windowed Register File (like Am29k)
Overflow detection in address computations is also a major source of
security bugs.
What, you aren't going to claim that this is not true?
- Re: Disadvanteges of Windowed Register File (like Am29k)
By the way, GPU instructions such as those on the AMD r700,
[link]
are 64 bits wide - two 32 bit words.
9 bit sourceopeerand speecifiers, of which 7 bitscan be used to specify
a register. and even then, the registers are 128 bits wide.
- Re: Fans could generate electricity and damage motherboard ?
No one has yet mentioned the fan bearings being driven so fast that they
become damaged. It is easy to destroy a ball bearing with a compressed
air hose, especially if you are cleaning the bearing with a solvent at
the time you over spin it.
Wilby
- Re: Disadvanteges of Windowed Register File (like Am29k)
(The below assumes you're using C or C++; I'm not sure how well this
translates to other compiled languages.)
Each platform, as part of its ABI, defines a standard convention for
user-mode* function calls. In general, your compiler will use that
calling convention by default for all functions and function calls.