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## _mm_mask_add_round_ss

# Function _mm_mask_add_round_ss

1.89.0 · Source

    pub fn _mm_mask_add_round_ss(
        src: __m128,
        k: __mmask8,
        a: __m128,
        b: __m128,
        const ROUNDING: i32,
    ) -> __m128

Available on x86-64 and target feature `avx512f` only.
Expand description

Add the lower single-precision (32-bit) floating-point element in a and b, store the result in the lower element of dst using writemask k (the element is copied from src when mask bit 0 is not set), and copy the upper 3 packed elements from a to the upper elements of dst.\

Rounding is done according to the rounding[3:0] 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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