Adding "write protect" with call instruction, removing "write protect" with return instruction.
Hello, I just had an idea how to protect the return address on the stack. The call instruction could make that region "write protected". The return instruction would then remove the "write protection". This would not prevent buffers overruns persee, but it would at least prevent the return address from be... 30 May 2010 19:46
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Hi Larry, Been on vacation lately? Find something to manage insomnia? Got a library card finally? Maybe found a meatloaf recipe at long last? Got a day job? GG ... 29 May 2010 00:39
https://semipublic.comp-arch.net/wiki/Batched_Instruction_Windowing_for_Single_Threaded_Execution == Assumptions == Say you want to speed up a single thread of execution. Say you have N processors to "spread" the execution across. Or say that you have N "execution clusters" (e.g. see [[Multicluster Microarc... 5 Jun 2010 23:27
Larrabee Dead http://www.semiaccurate.com/2010/05/27/larrabee-alive-and-well/ 'Note: For what it's worth, the leading candidate at Sony right now is an internal design that several describe as "Emotion Engine based". Sony should have waited for Larrabee three.....' Without a console win Larrabee is dead, ... 3 Jun 2010 19:00
SMT exploiting 21264-like clustering?
Another obvious (possibly half-way decent) idea: Use the duplicated register file of a clustered processor design like the Alpha 21264 to hold distinct contexts. Such a static partitioning might not be advisable under two simultaneous threads usually, but at four (reasonably active) threads, static partitioning ... 2 Jun 2010 02:14
Lolling at programmers, how many ways are there to create a bitmask ? ;) :)
On 2010-05-27, James Harris <james.harris.1(a)googlemail.com> wrote: On 27 May, 17:06, "Skybuck Flying" <IntoTheFut...(a)hotmail.com> wrote: I think to get rid of a branch (branches slow down cpu's) and thereby speed up the code. If you need a branch for this, you've done it wrong. Would you rather writ... 28 May 2010 20:21
Calculating longword pointer, which method is faster ?
Hello, There is a bit position which needs to be converted to the longword position in "byte pointer/offset form". Method 1: Divide the bit position by 32 (bits) and then to multiply it by 8 (bits). The division gets rid of the remainder/fraction, the integer part is then multiplied with 8 (bits) again ... 28 May 2010 10:24
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Is this group moderated at all? I browse using google groups and there are tons of spammers, which is a bit frustrating. I came to find out about XMOS, not XANAX... DK ... 27 May 2010 07:03