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Re: [PATCH] Sparc exp(), expf() performance improvement
From: Patrick McGehearty <patrick.mcgehearty@oracle.com>
Date: Wed, 2 Aug 2017 14:53:19 -0500
> I concur that it would be beneficial to use -mcpu=niagara4 for
> selected libm functions, but do not believe it should be default on
> without more extensive testing (and likely more compiler tuning).
This is precisely what has been suggested, have an niagara4 IFUNC
vector for math functions that benefit greatly from the fp<-->int
register move instructions.