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Comments:
<0> hey
<0> take care all
<1> hello all
<1> ppl any one alive ?
<2> yeah
<3> Who cares if we're alive or not...
<1> i do ,how can i find the founder
<3> I bet he doesn't even know he's lost.
<1> does he come alive at any time ?
<1> Ace1013
<3> Not usually at this time of day.
<1> ok
<1> for how long uv been here in this channel as an op ?
<3> He's usually around late at night, or early morning.
<3> Couple of years or so.
<3> Those are central european times, btw.
<1> did u know a dude with niick cerberos ?
<3> Nope
<3> Sounds vaguely familiar, but I don't think I've ever spoken to him.
<1> man i was sop here 5 years ago
<1> :)
<1> i used to come here still in 2000
<3> I can't remember when I first came here.
<1> def where are you from ?
<3> UK originally.
<1> kewl
<1> iv been to england
<4> using indirect addressing i want to access 3rd element of array of struct
<4> asume name of the array is people
<4> mov bx, offset people
<4> lea dx, person ptr [bx][3] doesnt do it for me
<5> woohoo
<5> a questiopn
<4> can i give different meaning to offset? since its displacement in bytes from the start address
<1> Ace1013 at last got ya
<4> anyway to tell masm that this offset there means 2 elements of person struct to skip
<5> blackbox: Which ***embler?
<4> MASM 5
<5> yes, scale
<5> how many bytes is each struct?
<5> cheerio tortured :)
<5> are you cerber0s?
<1> nope
<5> ok
<1> iam if you remeber anthrax}{
<1> :)
<5> aha
<4> "type person" can give that
<1> how ya doin dude
<5> long time no see :)
<1> yep
<1> it has been 5 years
<4> asume there are 10 bytes
<5> blackbox: "type person" won't cut it. You need it to be a power of two less than 16
<1> Ace1013 we'll talk later after you finish the dude ok
<5> ***embly is not so high level. Although masm tries to make it look that way. ***embly is much cooler :)
<5> there is a scale on x86
<5> you can do for example:
<5> lea edx, [person+ebx*4]
<4> ebx has the base address of array?
<5> if you can ***ume you have a 386 or newer, it might be wise to use 32 bit regs
<5> no
<5> ebx was an index
<4> person is the struct
<5> presuming each struct element was 4 bytes
<5> you can have a scale, index and base
<5> in 32 bit modes
<5> in 16 bit modes you have to choose something like bx+si, bx+di etc.
<5> basically you can use either bp or bx in combination with si og di
<5> and add an offset to that
<5> in 32 bit modes you can use any two registers, scale one of them by a power of two, and add a label/constant
<4> person is the name of the struct what does that specify in the lea example you gave?
<5> this is legal for example:
<5> brb, phone
<4> shouldnt person be 'people' instead (name of array of person)
<5> yeh, people
<5> sorry
<5> anyway, you can do things like:
<4> hmmmm i didnt know i could multiply as well
<5> mov eax, DWORD [eax+ecx*8+people] (nasm syntax)
<5> in 32-bit modes you can
<5> not in 16 bit modes
<5> the addressing uses an extra byte
<5> so "type person" is no good
<5> there is hardwired machinery in the cpu to read a certain two bits of a certain SIB-byte (scale-index-base) in the resulting machine code, interpreting it as a scale of a power of two
<5> you can't scale an index by 3
<5> if you wanted to, you'd have to mul it seperately
<5> or worse still, add it to itself twice
<4> oh thanks alot
<5> np :)
<5> of course, in masm, you will be writing "byte ptr [blablabla]" or something similar
<4> i can use scale only if my struct is of size in power of 2 and less than 16 right?
<5> chanserv is a rewdbwoy
<5> yup
<5> scale can be 1, 2, 4 or 8
<5> you can actually use lea as a mul sometimes too. Like "lea ebx, [ebx*8]"
<5> can be good for optimation
<5> can do "lea ebx, [ebx+ebx*4]" too, to mul by five. There are tricks like that
<4> cool
<5> *optimisation
<5> yup :)
<5> I have to run, I'm late for work
<5> ttyl :)
<5> good luck
<4> thanks once again
<5> np :)
<6> hello sir ;)
<5> hey :) (I've got to run, ttyl :) )
<6> good day sir :)
<1> Scooby_foo u r from india right ?
<6> torturedsoul: yes.
<1> i remeber you
<1> oraaaa
<1> another nick i know
<1> lol
<1> 5 years ago we had a fight with you here
<1> lol
<1> kia hal he ?
<6> fight with me 5 years back?
<6> I have been in #***embly for less than 4 years.
<1> when i say 5 i dont mean to say 365*5 || 365.333333*5
<6> oh well, I have been using this nick for barely two years.
<6> may be less.
<1> i remeber an indian coming to this chan long time back
<1> and he was keeping saying SIR
<6> most likely it was me.
<1> yes it is
<1> becuase evrey sentence u used sir
<1> anyway
<1> how is your ***embly going ?
<6> do you find something wrong with it?
<1> dont ask mer
<1> don't ask me
<1> about this
<1> i know you indians have your point of view about respect
<1> and i look naturly at that
<1> no negativly || positivly
<1> do u get me
<1> >?
<6> yes.
<1> how is your ***embly going ?
<6> bad, ace sir hasn't been teaching lately.
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