core::arch::x86::_mm_mask_roundscale_sd - Rust
Description: API documentation for the Rust `_mm_mask_roundscale_sd` fn in crate `core`.
Keywords: rust, rustlang, rust-lang, _mm_mask_roundscale_sd

# [−][src]Function core::arch::x86::_mm_mask_roundscale_sd

    pub unsafe fn _mm_mask_roundscale_sd(
        src: __m128d,
        k: __mmask8,
        a: __m128d,
        b: __m128d,
        imm8: i32
    ) -> __m128d

🔬 This is a nightly-only experimental API. (`stdsimd` #48556)
This is supported on x86 and target feature `avx512f` only.

Round the lower double-precision (64-bit) floating-point element in b to the number of fraction bits specified by imm8, 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 element from a to the upper element of dst.
Rounding is done according to the imm8[2:0] 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

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