Re: [POC] verifying UTF-8 using SIMD instructions

[Amit Khandekar]

Hi,

Just a quick question before I move on to review the patch ... The
improvement looks like it is only meant for x86 platforms. Can this be
done in a portable way by arranging for auto-vectorization ? Something
like commit 88709176236caf. This way it would benefit other platforms
as well.

I tried to compile the following code using -O3, and the assembly does
have vectorized instructions.

#include <stdio.h>
int main()
{
        int i;
        char s1[200] = "abcdewhruerhetr";
        char s2[200] = "oweurietiureuhtrethre";
        char s3[200] = {0};

    for (i = 0; i < sizeof(s1); i++)
    {
        s3[i] = s1[i] ^ s2[i];
    }

    printf("%s\n", s3);
}