This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: Improve -msse documentation (Was: Sorting out the list of P4 issues)

From: Richard Henderson <rth at redhat dot com>
To: Jan Hubicka <jh at suse dot cz>
Cc: Tom Womack <tom at womack dot net>, gcc at gcc dot gnu dot org
Date: Thu, 7 Feb 2002 13:21:45 -0800
Subject: Re: Improve -msse documentation (Was: Sorting out the list of P4 issues)
References: <008701c1af1c$060c50a0$5637f380@maths.nottingham.ac.uk> <20020207112340.GE26252@atrey.karlin.mff.cuni.cz>

Ok with changes:

> ! These switches enable or disable the use of MMX, SSE and 3Dnow extensions.
> ! This includes availablity of new builtins as well as limited amount of

						     as a limited

> ! automatical SSE code generation.  @xref{X86 Built-in Functions}, for

    automatic

> ! To enable automatical usage of SSE extensions for single precesion scalar

		automatic use				     precision 
> ! arithmetics and SSE2 extensions for double precision scalar arithmetics,

    arithmetic (twice).

> ! The option is implied by appropriate @option{-march} settings.

    The @option{-msse} option	certain

> ! @option{-mfpmath} needs to be always controlled manually as it changes ABI
> ! behaviour.

The @option{-mfpmath} option must be used explicitly as it changes the ABI.

> ! Automatical vectorization is not supported yet.

Automatic.



r~

References:
- Sorting out the list of P4 issues
  - From: Tom Womack
- Improve -msse documentation (Was: Sorting out the list of P4 issues)
  - From: Jan Hubicka

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]