## _mm_maskz_sub_round_sh

# Function _mm_maskz_sub_round_sh

Source

    pub fn _mm_maskz_sub_round_sh(
        k: __mmask8,
        a: __m128h,
        b: __m128h,
        const ROUNDING: i32,
    ) -> __m128h

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

Subtract the lower half-precision (16-bit) floating-point elements in b from a, store the result in the lower element of dst, and copy the upper 7 packed elements from a to the upper elements of dst using zeromask k (the element is zeroed out when mask bit 0 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