## _mm512_maskz_fmaddsub_round_ph

# Function _mm512_maskz_fmaddsub_round_ph

1.94.0 · Source

    pub fn _mm512_maskz_fmaddsub_round_ph(
        k: __mmask32,
        a: __m512h,
        b: __m512h,
        c: __m512h,
        const ROUNDING: i32,
    ) -> __m512h

Available on x86 and target feature `avx512fp16` only.
Expand description

Multiply packed half-precision (16-bit) floating-point elements in a and b, alternatively add and subtract packed elements in c to/from the intermediate result, and store the results in dst using zeromask k (the element is zeroed out when the corresponding mask bit is not set).

Rounding is done according to the rounding parameter, which can be one of:

- `_MM_FROUND_TO_NEAREST_INT` | `_MM_FROUND_NO_EXC` : round to nearest and suppress exceptions
- `_MM_FROUND_TO_NEG_INF` | `_MM_FROUND_NO_EXC` : round down and suppress exceptions
- `_MM_FROUND_TO_POS_INF` | `_MM_FROUND_NO_EXC` : round up and suppress exceptions
- `_MM_FROUND_TO_ZERO` | `_MM_FROUND_NO_EXC` : truncate and suppress exceptions
- `_MM_FROUND_CUR_DIRECTION` : use `MXCSR.RC` - see `_MM_SET_ROUNDING_MODE`

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