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[Bug math/20495] SIMD sincosf implementation lacks VEX encoded version
- From: "andrew.n.senkevich at gmail dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 25 Aug 2016 19:13:30 +0000
- Subject: [Bug math/20495] SIMD sincosf implementation lacks VEX encoded version
- Auto-submitted: auto-generated
- References: <bug-20495-131@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=20495
Andrew Senkevich <andrew.n.senkevich at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-08-25
Ever confirmed|0 |1
--- Comment #5 from Andrew Senkevich <andrew.n.senkevich at gmail dot com> ---
Thanks.
Investigation shows that it is degradation from 2.22 to 2.23 releases.
Simplified testcase is
#include <math.h>
#define NUM 9000*1000
float valsA[NUM];
float a[NUM];
int main(void)
{
int i;
for (i = 0; i < NUM; ++i)
{
a[i] += sinf(valsA[i]);
}
return (int)a[NUM-1];
}
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