Re: SSE2 register addition (linux gas)

Alexander Knopf a écrit :
quick questions about the above.

i'm writing a program that handles large numbers, over 128 bits.
now i understand i could just put 4 DWord sections of any number into an
xmm register, put another 4 DWords into a second and add them.
however, i don't know how the carry flag is handled.
so questions as follows:
1) which byte order would i have to use ?
2) would the carry bit be added to the next higher dword ?
3) what happens if the highest dword addition produces a carry ?

any help is greatly appreciated.

-Alexander Knopf


I would check first if there is a 128 bit ADD instruction...

.

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