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Re: Preprocessor macro for -mfpmath=sse ?


On Fri, May 03, 2002 at 08:16:03PM -0700, Tim Prince wrote:
> On Friday 03 May 2002 11:56, Sylvain Pion wrote:
> > I have implemented some interval arithmetic code which has to work around
> > the well known non-compliance (IEEE 754) issues of x86's floating point
> > unit. I would like to get rid of these costly workarounds when I compile
> > with -mfpmath=sse.
> > Would you consider adding a preprocessor macro that I could test for ?
> 
> I believe the pre-defined macros __SSE__ and __SSE2__ are intended for such 
> purposes.  

Where are they predefined ?
I don't see these macros :

~> gcc -v -c -mfpmath=sse -msse foo.c 
Reading specs from [...]
Thread model: single
gcc version 3.2 20020502 (experimental)
 ./gcc/Linux_trunc/bin/../lib/gcc-lib/i686-pc-linux-gnu/3.2/cc1 -lang-c -quiet
-v -iprefix ./gcc/Linux_trunc/bin/../lib/gcc-lib/i686-pc-linux-gnu/3.2/
-D__GNUC__=3 -D__GNUC_MINOR__=2 -D__GNUC_PATCHLEVEL__=0 -D__ELF__ -Dunix
-D__gnu_linux__ -Dlinux -D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__
-D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1
-Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__
-D__tune_pentiumpro__ foo.c -quiet -dumpbase foo.c -mfpmath=sse -msse -version
-o /tmp/ccFd2R6k.s


I would expect to see -D__SSE__ or such here.

-- 
Sylvain


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