core::arch::x86_64

# Function _mm512_getmant_round_ph

source

    pub unsafe fn _mm512_getmant_round_ph(
        a: __m512h,
        const NORM: _MM_MANTISSA_NORM_ENUM,
        const SIGN: _MM_MANTISSA_SIGN_ENUM,
        const SAE: i32,
    ) -> __m512h

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

Normalize the mantissas of packed half-precision (16-bit) floating-point elements in a, and store the results in 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. Exceptions can be suppressed by passing _MM_FROUND_NO_EXC in the sae parameter

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

Exceptions can be suppressed by passing _MM_FROUND_NO_EXC in the sae parameter

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