Function core::arch::x86::_mm_getexp_round_ss

pub unsafe fn _mm_getexp_round_ss(
    a: __m128, 
    b: __m128, 
    const SAE: i32
) -> __m128

🔬 This is a nightly-only experimental API. (stdsimd #48556)

This is supported on x86 and target feature avx512f only.

Convert the exponent of the lower single-precision (32-bit) floating-point element in b to a single-precision (32-bit) floating-point number representing the integer exponent, store the result in the lower element of dst, and copy the upper 3 packed elements from a to the upper elements of dst. This intrinsic essentially calculates floor(log2(x)) for the lower element.
Exceptions can be suppressed by passing _MM_FROUND_NO_EXC in the sae parameter.

Intel’s documentation