# Function core::arch::x86::_mm_maskz_reduce_round_ss

source ·

    pub unsafe fn _mm_maskz_reduce_round_ss(
        k: __mmask8,
        a: __m128,
        b: __m128,
        const IMM8: i32,
        const SAE: i32,
    ) -> __m128

🔬This is a nightly-only experimental API. (`stdarch_x86_avx512` #111137)
Available on (x86 or x86-64) and target feature `avx512dq` and x86 only.
Expand description

Extract the reduced argument of the lower single-precision (32-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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