_mm_getmant_sh in core::arch::x86 - Rust
Description: Normalize the mantissas of the lower half-precision (16-bit) floating-point element in b, store the result in the lower element of dst, and copy the upper 7 packed elements from a to the upper elements of dst. This intrinsic essentially calculates `±(2^k)*|x.significand|`, where k depends on the interval range defined by norm and the sign depends on sign and the source sign.

core::arch::x86

# Function _mm_getmant_sh

Source

    pub unsafe fn _mm_getmant_sh(
        a: __m128h,
        b: __m128h,
        const NORM: _MM_MANTISSA_NORM_ENUM,
        const SIGN: _MM_MANTISSA_SIGN_ENUM,
    ) -> __m128h

🔬This is a nightly-only experimental API. (`stdarch_x86_avx512_f16` #127213)
Available on (x86 or x86-64) and target feature `avx512fp16` and x86 only.
Expand description

Normalize the mantissas of the lower half-precision (16-bit) floating-point element in b, store the result in the lower element of dst, and copy the upper 7 packed elements from a to the upper elements of dst. This intrinsic essentially calculates `±(2^k)*|x.significand|`, where k depends on the interval range defined by norm and the sign depends on sign and the source sign.

The mantissa is normalized to the interval specified by interv, which can take the following values:

    _MM_MANT_NORM_1_2     // interval [1, 2)
    _MM_MANT_NORM_p5_2    // interval [0.5, 2)
    _MM_MANT_NORM_p5_1    // interval [0.5, 1)
    _MM_MANT_NORM_p75_1p5 // interval [0.75, 1.5)

The sign is determined by sc which can take the following values:

    _MM_MANT_SIGN_src     // sign = sign(src)
    _MM_MANT_SIGN_zero    // sign = 0
    _MM_MANT_SIGN_nan     // dst = NaN if sign(src) = 1

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