## _mm_maskz_reduce_round_sd

# Function _mm_maskz_reduce_round_sd

1.89.0 · Source

    pub fn _mm_maskz_reduce_round_sd(
        k: __mmask8,
        a: __m128d,
        b: __m128d,
        const IMM8: i32,
        const SAE: i32,
    ) -> __m128d

Available on (x86 or x86-64) and target feature `avx512dq` and x86 only.
Expand description

Extract the reduced argument of the lower double-precision (64-bit) floating-point element in b by the number of bits specified by imm8, store the result in the lower element of dst using zeromask k (the element is zeroed out when mask bit 0 is not set), and copy the upper element from a to the upper element of dst. Rounding is done according to the imm8 parameter, which can be one of:

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

Exceptions can be suppressed by passing _MM_FROUND_NO_EXC in the sae parameter.

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