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[XviD-devel] fixed point multiply instead of divisions?


To: "xvid-devel" <xvid-devel@xxxxxxxx>
Subject: [XviD-devel] fixed point multiply instead of divisions?
From: "carlo.bramix" <carlo.bramix@xxxxxxxxx>
Date: Wed, 27 Sep 2006 23:16:16 +0200
Delivered-to: itdp@localhost
Delivered-to: xvid-devel@s8.lansco.de

Hello,
after fixing my problem for the unsupported opcode, I was thinking about the 
need of the final 64 bit signed division.
Is it really required or it could be changed with a multiply with the inverse 
of the divisor?
While I was going to write this message, I saw that quantize_mpeg_xmm.asm isn't 
using an IDIV opcode, but it already has what I'm currently suggesting.
I don't know how much big could be these two numbers, so I wonder if it could 
be done.

Sincerely,

Carlo Bramini.

PS:
Although I didn't write it previously, I would like to thank you now.
You may ask me: "Why???"
It's simple, I saw that you added my name too into the header of cbp_mmx.asm
Thanks a lot! It's really a great honor for me!
Sorry for these delayed greetings...



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