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Re: [PATCH] make gcc generate fnmadd, fnmsub with -ffat-math
- From: Richard Henderson <rth at redhat dot com>
- To: Segher Boessenkool <segher at chello dot nl>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Tue, 9 Apr 2002 17:38:03 -0700
- Subject: Re: [PATCH] make gcc generate fnmadd, fnmsub with -ffat-math
- References: <3CB362D8.9A5767B4@chello.nl>
On Tue, Apr 09, 2002 at 11:53:29PM +0200, Segher Boessenkool wrote:
> + /* For floating point minus operations, test whether exchanging
> + operands and negating the result matches an instruction,
> + but only if doing unsafe math optimizations. */
Err, no. You should be doing this somewhere under
combine_simplify_rtx or in simplify-rtx.c.
r~