Data definition directive for 16-bytes operands

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Hunter

Joined: 07 Jun 2006
Posts: 41

Hunter

Does FASM support data definition directives for 16-bytes operands (for example ddq)?

11 Oct 2006, 10:11

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid

i think that it would be problem... fasm internally stores integers as 8byte values

11 Oct 2006, 10:20

Hunter

Joined: 07 Jun 2006
Posts: 41

Hunter

Tomasz, what do you think about it? Is it really big problem? This data definition directive would be very convenient Smile

13 Oct 2006, 14:45

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid

Hunter: can you give some example where you will use these numbers?

13 Oct 2006, 15:01

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 7802
Location: Kraków, Poland

Tomasz Grysztar

Look at the WIN64/MANDEL example, which uses the 16-byte packed data types. I don't know of any other appliance of such data sizes.

13 Oct 2006, 15:32

Hunter

Joined: 07 Jun 2006
Posts: 41

Hunter

Examples? SSE, SSE2, SSE3, SSSE3 and forthcoming SSE4.

13 Oct 2006, 17:01

Reverend

Joined: 24 Aug 2004
Posts: 408
Location: Poland

Reverend

For my SSE use (my processor doesn't have later SSE extensions) I use:

Code:

data_definition1 rd 4
data_definition2 dd 1.0, 2.0, 3.0, 4.0

movups xmm0, dqword [data_definition1]
movups xmm1, dqword [data_definition2]

17 Oct 2006, 12:26

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