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Re: 128 bit floating point arithmetic
- From: "Jiri Hladky" <hladky dot jiri at seznam dot cz>
- To: Eljay Love-Jensen <eljay at adobe dot com>
- Cc: gcc-help at gcc dot gnu dot org
- Date: Mon, 16 Feb 2004 22:26:08 +0100
- Subject: Re: 128 bit floating point arithmetic
- References: <4031038E.29810.CF7B01C6@localhost>
- Reply-to: hladky dot jiri at seznam dot cz
Hi Eljay,
thank you very much for your response.
> A quick Google search indicates that the Pentium 4 does not > natively support 128-bit floating point arithmetic. It does
I'm sorry that I did not check more deeply, you are right.
Pentium 4 (including Prescott) supports just SIMD on two
doubles or 4 floats. However, what about Athlon64? On web
page
http://www.devx.com/amd/Article/17962
there is mentioned that
"New native instructions for 64-bit integer and 128-bit floating-
point arithmetic"
On the other hand, I have checked the set of instructions for
Athlon64 and it does not seem that it supports 128-bit floating
point arithmetic. Any comments on this? Which processors
supports 128-bit floating point arithmetic? I just know about
sparc64, pa64, ia64-hpux and alpha-osf5.
Thank you very much!
Jirka