Re: other/10301: Side effects of architecture specific flags are not documented.

[Garen <garen@wsu.edu>]

The following reply was made to PR other/10301; it has been noted by GNATS.

From: Garen <garen@wsu.edu>
To: gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org,
	hubicka@gcc.gnu.org, garen@garen.net
Cc:  
Subject: Re: other/10301: Side effects of architecture specific flags are not documented.
Date: Thu, 24 Apr 2003 06:38:31 -0700

 According to http://gcc.gnu.org/gcc-3.2/changes.html, which says:
 
 Fixed common compiler crashes with SSE instruction set enabled (implied by 
 -march=pentium3, pentium4, athlon-xp)
 
 I still don't see those implications of -msse and -msse2 anywhere in the 
 manual still.  I don't see how that couldn't be "confusing".
 
 In the x86 option sections the flags are listed with no info:
 
 -mmmx 
 -mno-mmx 
 
 -msse 
 -mno-sse 
 
 -msse2 
 -mno-sse2 
 
 -m3dnow 
 
 It would be nice if instead it was something like:
 
 -mmmx	Enable MMX instructions.  Implied by -march=pentium-mmx, -march=pentium2
 
 -mno-mmx	Disable MMX instructions.
 
 -msse	Enable SSE instructions.  Implied by -march=pentium3, -march=athlon-*
 -mno-sse	Disable SSE instructions.
 
 -msse2	Enable SSE2 instructions.  Implied by -march=pentium4, ...
 -mno-sse2	Disable SSE2 instructions.
 
 -m3dnow	Enable 3DNow! instructions.  Implied by -march=athlon-*