simd_bool.rs - source
Description: Source of the Rust file `/Users/erlendbasso/.cargo/registry/src/github.com-1ecc6299db9ec823/simba-0.8.0/src/simd/simd_bool.rs`.
Keywords: rust, rustlang, rust-lang

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    use crate::simd::SimdValue;
    use std::ops::{BitAnd, BitOr, BitXor, Not};

    /// Lane-wise generalization of `bool` for SIMD booleans.
    ///
    /// This trait implemented by `bool` as well as SIMD boolean types like `packed_simd::m32x4`.
    /// It is designed to abstract the behavior of booleans so it can work with multi-lane boolean
    /// values in an AoSoA setting.
    pub trait SimdBool:
        Copy
        + BitAnd<Self, Output = Self>
        + BitOr<Self, Output = Self>
        + BitXor<Self, Output = Self>
        + Not<Output = Self>
    {
        /// A bit mask representing the boolean state of each lanes of `self`.
        ///
        /// The `i-th` bit of the result is `1` iff. the `i-th` lane of `self` is `true`.
        fn bitmask(self) -> u64;
        /// Lane-wise bitwise and of the vector elements.
        fn and(self) -> bool;
        /// Lane-wise bitwise or of the vector elements.
        fn or(self) -> bool;
        /// Lane-wise bitwise xor of the vector elements.
        fn xor(self) -> bool;
        /// Are all vector lanes true?
        fn all(self) -> bool;
        /// Is any vector lane true?
        fn any(self) -> bool;
        /// Are all vector lanes false?
        fn none(self) -> bool;
        /// Merges the value of `if_value()` and `else_value()` depending on the lanes of `self`.
        ///
        /// - For each lane of `self` containing `1`, the result will contain the corresponding lane of `if_value()`.
        /// - For each lane of `self` containing `0`, the result will contain the corresponding lane of `else_value()`.
        ///
        /// The implementor of this trait is free to choose on what cases `if_value` and `else_value` are actually
        /// called.
        fn if_else<Res: SimdValue<SimdBool = Self>>(
            self,
            if_value: impl FnOnce() -> Res,
            else_value: impl FnOnce() -> Res,
        ) -> Res;

        /// Merges the value of `if_value()` and `else_if.1()` and `else_value()` depending on the lanes of `self` and `else_if.0()`.
        ///
        /// - For each lane of `self` containing `1`, the result will contain the corresponding lane of `if_value()`.
        /// - For each lane of `self` containing `0` but with a corresponding lane of `else_if.0()` containing `1`, the result will contain the corresponding lane of `else_if.1()`.
        /// - For each lane of `self` containing `0` but with a corresponding lane of `else_if.0()` containing `0`, the result will contain the corresponding lane of `else_value()`.
        ///
        /// The implementor of this trait is free to choose on what cases any of those closures are implemented.
        fn if_else2<Res: SimdValue<SimdBool = Self>>(
            self,
            if_value: impl FnOnce() -> Res,
            else_if: (impl FnOnce() -> Self, impl FnOnce() -> Res),
            else_value: impl FnOnce() -> Res,
        ) -> Res;

        /// Merges the value of `if_value()` and `else_if.1()` and `else_else_if.1()` and `else_value()` depending on the lanes of `self` and `else_if.0()` and `else_else_if.0()`.
        ///
        /// - For each lane of `self` containing `1`, the result will contain the corresponding lane of `if_value()`.
        /// - For each lane of `self` containing `0` but with a corresponding lane of `else_if.0()` containing `1`, the result will contain the corresponding lane of `else_if.1()`.
        /// - For each lane of `self` containing `0` and `else_if.0()` containing `0` and `else_else_if.0()` containing `1`, the result will contain the corresponding lane of `else_else_if.1()`.
        /// - Other lanes will contain the corresponding lane of `else_value()`.
        ///
        /// The implementor of this trait is free to choose on what cases any of those closures are implemented.
        fn if_else3<Res: SimdValue<SimdBool = Self>>(
            self,
            if_value: impl FnOnce() -> Res,
            else_if: (impl FnOnce() -> Self, impl FnOnce() -> Res),
            else_else_if: (impl FnOnce() -> Self, impl FnOnce() -> Res),
            else_value: impl FnOnce() -> Res,
        ) -> Res;
    }

    impl SimdBool for bool {
        #[inline(always)]
        fn bitmask(self) -> u64 {
            self as u64
        }

        #[inline(always)]
        fn and(self) -> bool {
            self
        }

        #[inline(always)]
        fn or(self) -> bool {
            self
        }

        #[inline(always)]
        fn xor(self) -> bool {
            self
        }

        #[inline(always)]
        fn all(self) -> bool {
            self
        }

        #[inline(always)]
        fn any(self) -> bool {
            self
        }

        #[inline(always)]
        fn none(self) -> bool {
            !self
        }

        #[inline(always)]
        fn if_else<Res: SimdValue<SimdBool = Self>>(
            self,
            if_value: impl FnOnce() -> Res,
            else_value: impl FnOnce() -> Res,
        ) -> Res {
            if self {
                if_value()
            } else {
                else_value()
            }
        }

        #[inline(always)]
        fn if_else2<Res: SimdValue<SimdBool = Self>>(
            self,
            if_value: impl FnOnce() -> Res,
            else_if: (impl FnOnce() -> Self, impl FnOnce() -> Res),
            else_value: impl FnOnce() -> Res,
        ) -> Res {
            if self {
                if_value()
            } else if else_if.0() {
                else_if.1()
            } else {
                else_value()
            }
        }

        #[inline(always)]
        fn if_else3<Res: SimdValue<SimdBool = Self>>(
            self,
            if_value: impl FnOnce() -> Res,
            else_if: (impl FnOnce() -> Self, impl FnOnce() -> Res),
            else_else_if: (impl FnOnce() -> Self, impl FnOnce() -> Res),
            else_value: impl FnOnce() -> Res,
        ) -> Res {
            if self {
                if_value()
            } else if else_if.0() {
                else_if.1()
            } else if else_else_if.0() {
                else_else_if.1()
            } else {
                else_value()
            }
        }
    }