core::arch::x86_64::_mm_roundscale_ss - Rust
Description: API documentation for the Rust `_mm_roundscale_ss` fn in crate `core`.
Keywords: rust, rustlang, rust-lang, _mm_roundscale_ss

# [−][src]Function core::arch::x86_64::_mm_roundscale_ss

    pub unsafe fn _mm_roundscale_ss(a: __m128, b: __m128, imm8: i32) -> __m128

🔬 This is a nightly-only experimental API. (`stdsimd` #48556)
This is supported on x86-64 and target feature `avx512f` only.

Round the lower single-precision (32-bit) floating-point element in b to the number of fraction bits specified by imm8, store the result in the lower element of dst, and copy the upper 3 packed elements from a to the upper elements 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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