[PATCH] Sparc exp(), expf() performance improvement

[David Miller]

From: Patrick McGehearty <patrick.mcgehearty@oracle.com>
Date: Mon, 31 Jul 2017 15:39:29 -0400

> This PATCH is intended to improve exp() and expf() performance on Sparc.
> These changes will only be active on Sparc platforms and only for
> those platforms that support HWCAP_SPARC_CRYPTO (niagara4 and later).

Can you explain which instructions exactly help make the compiled
C code for exp() and expf() faster instead of being vague like
this?

Wouldn't the new C code you are adding be faster on other CPUs as
well, even without gcc generating instructions for Niagara 4 and
later?

Thank you.