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Nvidia Said to Take On Intel in Tablet Computer Chips
Nvidia Said to Take On Intel in Tablet Computer Chips - Bloomberg
"Trying to replicate the performance of Intel chips using software -- an approach Transmeta tried about a decade ago -- hasn’t worked before because it’s hard to deliver enough performance to run computer programs like Microsoft Corp.’s Windows fast enough, according to In-Stat’s McGregor. Intel’s X86 technology has taken over the PC and server industries, displacing companies such as Motorola Inc., whose chips once ran Apple computers. " http://www.bloomberg.com/news/2010-0...rocessors.html |
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Nvidia Said to Take On Intel in Tablet Computer Chips
On Sun, 15 Aug 2010 13:26:06 -0400, Yousuf Khan
wrote: [...]"Intel’s X86 technology has taken over the PC and server industries, displacing companies such as Motorola Inc., whose chips once ran Apple computers. " Wow. "Breaking news", eh? Did somebody set the Way Back Machine to the 1990s - when "Motorola" and "computer" were still used in the same sentence? Sheesh... obcsiphc: Good luck to emulators everywhere. As always, they're gonna need it... /daytripper |
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Nvidia Said to Take On Intel in Tablet Computer Chips
On 15/08/2010 8:09 PM, daytripper wrote:
On Sun, 15 Aug 2010 13:26:06 -0400, Yousuf wrote: [...]"Intel’s X86 technology has taken over the PC and server industries, displacing companies such as Motorola Inc., whose chips once ran Apple computers. " Wow. "Breaking news", eh? Did somebody set the Way Back Machine to the 1990s - when "Motorola" and "computer" were still used in the same sentence? Sheesh... obcsiphc: Good luck to emulators everywhere. As always, they're gonna need it... /daytripper They really need to take over VIA, and get their core. The core is modern. Yousuf Khan |
#4
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Nvidia Said to Take On Intel in Tablet Computer Chips
On Aug 15, 8:09*pm, daytripper wrote:
.. obcsiphc: Good luck to emulators everywhere. As always, they're gonna need it... As I understand it, x86 now emulates x86. There must be patents related to instruction decode that make it hard for others to play, as the ISA and the physical operations of the microprocessor are now separated by microcode for [almost?] all processors outside the embedded space. I don't really know of exceptions. Robert. |
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Nvidia Said to Take On Intel in Tablet Computer Chips
On 16/08/2010 5:51 PM, Robert Myers wrote:
On Aug 15, 8:09 pm, wrote: . obcsiphc: Good luck to emulators everywhere. As always, they're gonna need it... As I understand it, x86 now emulates x86. There must be patents related to instruction decode that make it hard for others to play, as the ISA and the physical operations of the microprocessor are now separated by microcode for [almost?] all processors outside the embedded space. I don't really know of exceptions. Robert. In most modern implementations of x86, certain common instructions are considered hard-coded, while others are emulated through microcode. Most floating point instructions are a series of more basic instructions. Yousuf Khan |
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Nvidia Said to Take On Intel in Tablet Computer Chips
On Aug 17, 1:52*pm, Yousuf Khan wrote:
In most modern implementations of x86, certain common instructions are considered hard-coded, while others are emulated through microcode. Most floating point instructions are a series of more basic instructions. I'll take the word of real computer architects on this one, Yousuf. Past the decode stage, the ISA doesn't matter. Programmers and others like to talk about ISA's because that's all they understand. ISA is irrelevant now. Whatever obstacles there are to "emulating" x86 have nothing to do with the ISA. Robert. |
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Nvidia Said to Take On Intel in Tablet Computer Chips
On 17/08/2010 2:06 PM, Robert Myers wrote:
I'll take the word of real computer architects on this one, Yousuf. Past the decode stage, the ISA doesn't matter. Programmers and others like to talk about ISA's because that's all they understand. ISA is irrelevant now. Whatever obstacles there are to "emulating" x86 have nothing to do with the ISA. Yeah, who's that? Yousuf Khan |
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Nvidia Said to Take On Intel in Tablet Computer Chips
Robert Myers wrote:
On Aug 17, 1:52 pm, Yousuf Khan wrote: In most modern implementations of x86, certain common instructions are considered hard-coded, while others are emulated through microcode. Most floating point instructions are a series of more basic instructions. I'll take the word of real computer architects on this one, Yousuf. Past the decode stage, the ISA doesn't matter. It doesn't matter except in cases where it does What's behind decode stage is still strongly tied to ISA. Stuff like retirement logic, memory ordering, or even such basic stuff like execution pipeline arangement is dictated by ISA. And the rest is optimised for a particular ISA (or performance will be lousy). Even transmeta chip was optimised for x86 ISA emulation -- without that performance would be even lousier. What doesn't matter beind decode is layout of various instructions (ie. where is an opcode, where are registers described, etc.). That's important stuff as that is the stuff distinguishing RISC from CISC. But that's not all the stuff -- things like number of registers, memory ordering requirements, etc *do* matter alot (and is stall part of an ISA). rgds \SK -- "Never underestimate the power of human stupidity" -- L. Lang -- http://www.tajga.org -- (some photos from my travels) |
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ISA does not matter
In article
, Robert Myers wrote: On Aug 17, 1:52*pm, Yousuf Khan wrote: In most modern implementations of x86, certain common instructions are considered hard-coded, while others are emulated through microcode. Most floating point instructions are a series of more basic instructions. I'll take the word of real computer architects on this one, Yousuf. Past the decode stage, the ISA doesn't matter. Programmers and others like to talk about ISA's because that's all they understand. ISA is irrelevant now. Whatever obstacles there are to "emulating" x86 have nothing to do with the ISA. Robert. You are wrong. I give you the example of Apple's AltiVec instruction set. AltiVec at introduction gave the PowerPC chips a 10x speed advantage on a bunch of important graphical benchmarks, and makes the vector processor useful in a wide variety of other tasks that are not normally thought of as vector code. (Filesystem block allocation, etc.) Ultimately this one innovation alone was not enough for PowerPC to overcome all the disadvantages of competing against Intel, but it did level the playing field for a decade. AltiVec came from a software firm, those "real computer architects" idea of innovation was Thumb1 and MIPS16, bunch of (CENSORED). Brett |
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Nvidia Said to Take On Intel in Tablet Computer Chips
On Tue, 17 Aug 2010 13:52:14 -0400, Yousuf Khan
wrote: On 16/08/2010 5:51 PM, Robert Myers wrote: On Aug 15, 8:09 pm, wrote: . obcsiphc: Good luck to emulators everywhere. As always, they're gonna need it... As I understand it, x86 now emulates x86. There must be patents related to instruction decode that make it hard for others to play, as the ISA and the physical operations of the microprocessor are now separated by microcode for [almost?] all processors outside the embedded space. I don't really know of exceptions. Robert. In most modern implementations of x86, certain common instructions are considered hard-coded, while others are emulated through microcode. Most floating point instructions are a series of more basic instructions. Yousuf Khan ooooh..."emulated through microcode" seems rather pejorative, considering the obvious alternative design styles might never yield a functional device in your lifetime ;-) /daytripper |
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