Date: Sat, 10 Jun 2017 13:25:00 -0400 From: David Edelsohn <dje.gcc@...il.com> To: musl@...ts.openwall.com Subject: Re: [PATCH] s390x: Add single instruction math functions On Sat, Jun 10, 2017 at 11:36 AM, Szabolcs Nagy <nsz@...t70.net> wrote: > * David Edelsohn <dje.gcc@...il.com> [2017-06-09 10:51:25 -0400]: >> The following patch is a start at single instruction math functions >> for s390x architecture to increase performance. > > looks good, i wonder why gcc does not have builtins support for > ceil, floor, nearbyint, round and trunc > > (on aarch64 the builtins expand to single instruction with > -fno-math-errno, but on s390x they remain libc calls Both the functions and builtins are converted to single instructions for me. What architecture level is your GCC assuming? > at some point we plan to have some internal header to turn > math/string calls into builtins when compiling musl with gcc) I have a patch set ready for powerpc64 teed up after this patch. Thanks, David
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