I am trying to move a specific value generated by the user into a dq? to use SSE2 arithmetic on it

when I use the FPU I use dword and do something like this


but I can't do this for dq words

how would I get eax into buffer1 if it was a dq?

thanks srry for the noob question

A DQ sized value is 64-bits so it won't fit into a 32-bit register. There are various options.

thanks for helping revolution, but I still can't get it to do what I want.
I have a proc that will calculate the area of a triangle and shove the result into the eax register

I was wondering how can I get the eax register into the buffer1 dq ?

in the example you provided I don't understand why the value is their, and frankly I have never seen half of the instructions, lol.

i tried this


but instead of buffer1 containing 1.0 it contained 0.00781

thanks

Oh, so you want to convert from single precision to double? Is that your query?

If so then perhaps:

thanks revolution, you taught me something new again, lol

if you don't mind could you explain to me a few things on the first code you posted.

first of all what was the first code for(what is the purpose of it?)
second I have never seen multiple instructions on the same line? like the "mov eax,value and 0xffffffff "
lastly I know what the [buffer1+4] is but I have never seen the [buffer1+4*0] what is the * for?

thanks for helping me!

There are not multiple instructions on one line. It is an "expression" that is evaluated by fasm to get the final constant. "value" is 64-bits so it is broken into two pieces of 32-bits and placed into the buffer. And the * is just a multiply, the same as +, - and / where fasm computes the value at assembly time. So 4*0 is just 0, and 4*1 is 4.

oh okay. thanks!