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target/5610: Not clear how to get FP operations to use SSE
- From: tom at womack dot net
- To: gcc-gnats at gcc dot gnu dot org
- Date: 6 Feb 2002 14:24:08 -0000
- Subject: target/5610: Not clear how to get FP operations to use SSE
- Reply-to: tom at womack dot net
>Number: 5610
>Category: target
>Synopsis: Not clear how to get FP operations to use SSE
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: unassigned
>State: open
>Class: doc-bug
>Submitter-Id: net
>Arrival-Date: Wed Feb 06 06:26:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: Thomas Womack
>Release: gcc-3.1-20020204
>Organization:
>Environment:
>Description:
The option "-msse-math" appears in doc/invoke.texi (line 484, in the list of i386 and x86-64 options), but the compiler does not recognise it.
This option is now spelt "-mfpmath=sse".
I think SSE2 should be mentioned explicitly as an instruction-set extension in line 7766 (along with MMX, SSE and 3dNow), and (though -mfp-math=sse does reference -msse2) that the documentation for -msse should include a line like "to have SSE/SSE2 instructions generated automatically from floating-point code, see @option{-mfpmath=sse}". Also, -msse2 should be added to the @opindex entries around that line.
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: