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Re: [fortran,patch] Support for IEEE underflow control on x86/x86_64
- From: FX <fxcoudert at gmail dot com>
- To: Uros Bizjak <ubizjak at gmail dot com>
- Cc: Fortran List <fortran at gcc dot gnu dot org>, gcc-patches <gcc-patches at gcc dot gnu dot org>
- Date: Thu, 3 Jul 2014 11:42:44 +0200
- Subject: Re: [fortran,patch] Support for IEEE underflow control on x86/x86_64
- Authentication-results: sourceware.org; auth=none
- References: <184DE738-2E8A-4310-A1FB-8BF351C2F88A at gmail dot com> <CAFULd4apPf0hQSARz2QKNjTCU3m24YQi3mFU0mUWV5RbwdwOkg at mail dot gmail dot com>
> (I don't think -O0 is needed, but have to check with a testsuite run.)
On x86_64-apple-darwin, -O0 or -O1 are needed: at -O2 my “use_real” call is optimized out anyway, and the division simplified at compile time.
FX