Re: newbie: MUL product

På Thu, 29 Mar 2007 17:48:39 +0200, skrev Herbert Kleebauer <klee@xxxxxxxxx>:

Brian wrote:
On Thu, 29 Mar 2007 17:04:48 +0200, Herbert Kleebauer <klee@xxxxxxxxx>

>00000104: 66 f7 26 010e mulu.l val2,r0,r1|r0

What if my multiplier and multiplicand are both 32-bit to begin with,
and I'm in a 32 bit environment.

Are my options in that case as follows:

Define a QWORD (64-bit) "product" variable
move offset of product variable to register
?????

copy edx (high dword) to offset of product variable
copy eax (low dword) to (offset + 4)

copy eax to product_variable
copy edx to product_variable+4

Don't know the MASM syntax, someting like:

mov dword ptr product_variable,eax
mov dword ptr product_variable+4,edx

Or in a readable way:

move.l r0,product_variable
move.l r1,product_variable+4

and even more readable:

mov ebx Productvariable
mov D$ebx eax
mov D$ebx+4 edx

and in (\\o//'ex)

BB Productvariable
89 03
89 53 04

BB and 89 both are mov.
Does that mean that "mov, move" is a generalization?

Herbert, you assembler is simply bloat. :)






.

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