cvs commit: src/lib/msun/alpha fenv.h src/lib/msun/amd64 fenv.h src/lib/msun/arm fenv.h src/lib/msun/i387 fenv.h src/lib/msun/ia64 fenv.h src/lib/msun/powerpc fenv.h src/lib/msun/sparc64 fenv.h

[Kris Kennaway]

On Fri, Jan 14, 2005 at 07:09:23AM +0000, David Schultz wrote:
> das         2005-01-14 07:09:23 UTC
> 
>   FreeBSD src repository
> 
>   Modified files:
>     lib/msun/alpha       fenv.h 
>     lib/msun/amd64       fenv.h 
>     lib/msun/arm         fenv.h 
>     lib/msun/i387        fenv.h 
>     lib/msun/ia64        fenv.h 
>     lib/msun/powerpc     fenv.h 
>     lib/msun/sparc64     fenv.h 
>   Log:
>   Mark all inline asms that read the floating-point control or status
>   registers as volatile.  Instructions that *wrote* to FP state were
>   already marked volatile, but apparently gcc has license to move
>   non-volatile asms past volatile asms.  This broke amd64's feupdateenv
>   at -O2 due to a WAR conflict between fnstsw and fldenv there.

Do you think this is likely to the cause of the build failures
reported with a number of ports when world is compiled with -O2
(i.e. does the feupdateenv failure cascade to other commonly-used
parts of the code)?

Kris

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