[Bug math/20495] SIMD sincosf implementation lacks VEX encoded version

andrew.n.senkevich at gmail dot com sourceware-bugzilla@sourceware.org
Thu Aug 25 19:13:00 GMT 2016


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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