mailing list of musl libc

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 #include <math.h>
#include <stdint.h>

long long llrintf(float x)
{
    long long r;

    __asm__ __volatile__(
    "frint.s %[x], %[orig_x]            \n\t"
    "ftintrz.w.s %[x], %[x]             \n\t"
    "movfr2gr.s %[result], %[x]         \n\t"
    : [result]"+r"(r), [x]"+f"(x)
    : [orig_x]"f"(x)
    :);

    return r;
}