编译器内联调用std::frexp了吗?

编译器浏览器说程序调用 frexp

这是不是意味着编译器没有为 弗雷克斯 ?

代码是用 g++ -Ofast -march=native

Code at compiler explorer

测试(c++):

#include <Eigen/Eigen>
using namespace Eigen;
void log2_extract_mantissa(ArrayXXf& x) {
    // rip mantissa out of floats and store the result as int in-place.
    std::int32_t* int_data = reinterpret_cast<std::int32_t*>(x.data());
    for(Index i = 0; i < x.size(); ++i) {
        std::frexp(x.data()[i], int_data + i);
    }
}

...
.L3:
        vmovss  xmm0, DWORD PTR [rax+rbx*4]
        lea     rdi, [r12+rbx*4]
        call    frexpf
        mov     rax, QWORD PTR [rbp+16]
        inc     rbx
        imul    rax, QWORD PTR [rbp+8]
        cmp     rbx, rax
        jl      .L7
...