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Comments:
<0> anyone got a url to a nice source on writing a boot loader for x86?
<0> for newbies?
<1> http://www.nondot.org/sabre/os/articles/TheBootProcess/
<0> markos_64: THANK YOU!
<2> morning all
<3> talrasha! i kicked his *** a lot of with my necromancer
<1> yawn?
<4> yeah! me too
<1> also, hi steffylove/misha
<4> though, it was "baal" more appropriately
<4> hi markos_64 :D
<5> markos_64: i think you may know the answer to this, does printf round down or truncate after the hundredths value with .2%f? IE, 3.431 becomes 3.43...but i can't figure out if its truncating or rounding down. 3.435 becomes 3.46
<5> .%2f rather
<5> %.2f even heh
<5> ***embler code hasn't helped any
<1> johnjay: SUSv3 sayeth that 'The low-order digit shall be rounded in an implementation-defined manner.'
<1> johnjay: so, basically, it can be either way.
<5> I see, you wouldn what implementation is define
<5> you wouldn't happen to know which implementation is defined by glibc would you?
<1> round to nearest, it seems.
<1> with 5 rounded up
<5> speaking from a billing perspective, there isn't a real difference between truncating and rounding down is there?
<1> -sive numbers
<1> other than that, no.
<5> -sive numbers?
<1> yah. like -0.3. rounding down, it's -1. Truncating, 0.
<6> johnjay, check with your countries taxation/accounting rules for rounding some countries do have advice on this (UK vat does)
<5> rounding to the nearest hundredth i meant, like with %.2f
<1> this doesn't matter.
<1> -0.123 is -0.13 rounded down. -0.12 truncated.
<1> but glibc uses round-to-nearest.
<5> so in that case glibc rounds to -.12 correct?
<1> yea
<5> the thing is, it outputs -.13 when I do:
<5> printf("%.2f\n",-.126);
<1> round to nearest.
<1> do i have to repeat it once again?
<6> we had an accounting program that truncated every invoice line (and the total) so made a monthly error of that got me an inspection from the Customs and Excise
<5> markos_64: no, i understand what you are saying. but the discrepency with -.125 rounding to -.125 whereas .125 rounding to .126 ?
<5> err
<5> 1.3
<5> no, wait, it does not.
<1> you drunk or what?
<5> heh
<7> Design a new opcode for SRC, reset, (op =18), that does a hard reset or a soft reset, depending upon the value of c1<0>.
<7> 1. Hard reset if c1<0> = 0
<7> 2. Soft reset if c1<0> = 1
<7> wtf does that mean?!?!?!
<7> :)
<8> 'lo
<9> http://verb.org.ua/ia-32-instructions-database/
<1> do you have plain-SQL version of that?
<1> and do you have 64-bit support?
<9> yes, it is a plain sql... and no, no 64-bit at the moment, but it is planned
<10> its 64 bit as soon as I finish testing the 32 bit version
<1> hm... where is the plain-SQL version downloadable?
<9> http://verb.org.ua/files/ia-32-instrdb.tar.bz2 or here http://verb.org.ua/gitweb/?p=ia-32-instrdb.git;a=blob_plain;h=8ea169141debd021219b3c2b888063952d3ccd2a;f=ia32instrs.sql
<9> the best option is fetching up-to-date repository version
<10> you need the schema sql too
<9> http://verb.org.ua/gitweb/?p=ia-32-instrdb.git;a=blob_plain;h=c3ff01c9b5d23fb5605151e55ab5ccb1a35d625c;f=schema.sql
<1> nice
<9> is it ok to ***ume that no instruction could have XX+r* and then 1+ opcode bytes?
<9> so, +rb, +rw, +rd, +ro could appear only at the end of opcode sequence
<1> no instruction currently does it, and i doubt there will ever be one where it matters.
<1> but then, this is x86. it is kludged from each and every side possible. YMMV.
<9> hm
<9> then I doubt whether I should move +r* from opcode field to format... but then, it will be so nice for my ***embling function
<9> if finding it in format
<9> i need to understand whether all instructions have byte values first, then /r or /N or +r* or whatever
<9> it appears to be quite important :]
<9> there is only 16 instructions with +r*? heh
<11> hi
<1> :wq
<1> whoops
<3> hehe
<1> btw, does any of you happen to know a simple and painless way to implement a sane mutex using only test-and-set operation and futex interface?
<1> got it, i think
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