Skip to main content

## _mm512_mask3_fnmsub_round_ph

# Function _mm512_mask3_fnmsub_round_ph

1.94.0 · Source

    pub fn _mm512_mask3_fnmsub_round_ph(
        a: __m512h,
        b: __m512h,
        c: __m512h,
        k: __mmask32,
        const ROUNDING: i32,
    ) -> __m512h

Available on x86-64 and target feature `avx512fp16` only.
Expand description

Multiply packed half-precision (16-bit) floating-point elements in a and b, subtract packed elements in c from the negated intermediate result, and store the results in dst using writemask k (the element is copied from c 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`

Intel’s documentation