compute 0.2.3

A crate for statistical computing.
Documentation 
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// #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
// use std::arch::x86_64::*;

// /// Vector-vector operations.
// #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
// macro_rules! makefn_vops_binary_simd {
//     ($opname: ident, $op: tt, $unsafeop: tt) => {
//         #[doc = "Implements a loop-unrolled version of the `"]
//         #[doc = stringify!($op)]
//         #[doc = "` function to be applied element-wise to two vectors."]
//         pub(crate) fn $opname(v1: &[f64], v2: &[f64]) -> Vec<f64> {
//             assert_eq!(v1.len(), v2.len());
//             let n = v1.len();

//             // let mut v = vec![0.; n];
//             let mut v = Vec::with_capacity(n);
//             unsafe {
//                 v.set_len(n);
//             }
//             let chunks = (n - (n % 8)) / 8;

//             #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
//             unsafe {
//                 (v1.chunks_exact(8).zip(v2.chunks_exact(8)))
//                 .enumerate()
//                 .for_each(|(idx, (i, j))| {
//                     let a_pd = _mm256_loadu_pd(i.as_ptr());
//                     let b_pd = _mm256_loadu_pd(j.as_ptr());
//                     let c_pd = $unsafeop(a_pd, b_pd);
//                     _mm256_storeu_pd(
//                         (v.as_mut_ptr() as *mut f64).add((idx * 8)),
//                         c_pd,
//                     );
//                     let a_pd = _mm256_loadu_pd(i.as_ptr().offset(4));
//                     let b_pd = _mm256_loadu_pd(j.as_ptr().offset(4));
//                     let c_pd = $unsafeop(a_pd, b_pd);
//                     _mm256_storeu_pd(
//                         (v.as_mut_ptr() as *mut f64).add((idx * 8 + 4)),
//                         c_pd,
//                     );
//                 });
//             }

//             // do the rest
//             for j in (chunks * 8)..n {
//                 v[j] = v1[j] $op v2[j];
//             }

//             v
//         }
//     }
// }

/// Vector-vector operations.
macro_rules! makefn_vops_binary {
    ($opname: ident, $op: tt) => {
        #[doc = "Implements a loop-unrolled version of the `"]
        #[doc = stringify!($op)]
        #[doc = "` function to be applied element-wise to two vectors."]
        pub(crate) fn $opname(v1: &[f64], v2: &[f64]) -> Vec<f64> {
            assert_eq!(v1.len(), v2.len());
            let n = v1.len();

            // let mut v = vec![0.; n];
            let mut v = Vec::with_capacity(n);
            unsafe {
                v.set_len(n);
            }
            let chunks = (n - (n % 8)) / 8;

            {
                // unroll
                for i in 0..chunks {
                    let idx = i * 8;
                    assert!(n > idx + 7);
                    v[idx] = v1[idx] $op v2[idx];
                    v[idx + 1] = v1[idx + 1] $op v2[idx + 1];
                    v[idx + 2] = v1[idx + 2] $op v2[idx + 2];
                    v[idx + 3] = v1[idx + 3] $op v2[idx + 3];
                    v[idx + 4] = v1[idx + 4] $op v2[idx + 4];
                    v[idx + 5] = v1[idx + 5] $op v2[idx + 5];
                    v[idx + 6] = v1[idx + 6] $op v2[idx + 6];
                    v[idx + 7] = v1[idx + 7] $op v2[idx + 7];
                }
            }

            // do the rest
            for j in (chunks * 8)..n {
                v[j] = v1[j] $op v2[j];
            }

            v
        }
    }
}

// #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
// makefn_vops_binary_simd!(vadd, +, _mm256_add_pd);
// #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
// makefn_vops_binary_simd!(vsub, -, _mm256_sub_pd);
// #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
// makefn_vops_binary_simd!(vmul, *, _mm256_mul_pd);
// #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
// makefn_vops_binary_simd!(vdiv, /, _mm256_div_pd);

makefn_vops_binary!(vadd, +);
makefn_vops_binary!(vsub, -);
makefn_vops_binary!(vmul, *);
makefn_vops_binary!(vdiv, /);

/// Vector-vector mutating operations.
macro_rules! makefn_vops_binary_mut {
    ($opname: ident, $op:tt) => {
        #[doc = "Implements a loop-unrolled version of the `"]
        #[doc = stringify!($op)]
        #[doc = "` function to be applied element-wise to two vectors."]
        pub(crate) fn $opname(v1: &mut [f64], v2: &[f64]) {
            assert_eq!(v1.len(), v2.len());
            let n = v1.len();

            let chunks = (n - (n % 8)) / 8;

            // unroll
            for i in 0..chunks {
                let idx = i * 8;
                assert!(n > idx + 7);
               v1[idx] $op v2[idx];
               v1[idx + 1] $op v2[idx + 1];
               v1[idx + 2] $op v2[idx + 2];
               v1[idx + 3] $op v2[idx + 3];
               v1[idx + 4] $op v2[idx + 4];
               v1[idx + 5] $op v2[idx + 5];
               v1[idx + 6] $op v2[idx + 6];
               v1[idx + 7] $op v2[idx + 7];
            }

            // do the rest
            for j in (chunks * 8)..n {
                v1[j] $op v2[j];
            }
        }
    }
}

makefn_vops_binary_mut!(vadd_mut, +=);
makefn_vops_binary_mut!(vsub_mut, -=);
makefn_vops_binary_mut!(vmul_mut, *=);
makefn_vops_binary_mut!(vdiv_mut, /=);

/// Single vector operations.
macro_rules! makefn_vops_unary {
    ($opname: ident, $op:ident) => {
        #[doc = "Implements a loop-unrolled version of the `"]
        #[doc = stringify!($op)]
        #[doc = "` function to be applied element-wise to a vector."]
        pub(crate) fn $opname(v1: &[f64]) -> Vec<f64> {
            let n = v1.len();

            // let mut v = vec![0.; n];
            let mut v = Vec::with_capacity(n);
            unsafe {
                v.set_len(n);
            }

            let chunks = (n - (n % 8)) / 8;

            // unroll
            for i in 0..chunks {
                let idx = i * 8;
                assert!(n > idx + 7);
                v[idx] = v1[idx].$op();
                v[idx + 1] = v1[idx + 1].$op();
                v[idx + 2] = v1[idx + 2].$op();
                v[idx + 3] = v1[idx + 3].$op();
                v[idx + 4] = v1[idx + 4].$op();
                v[idx + 5] = v1[idx + 5].$op();
                v[idx + 6] = v1[idx + 6].$op();
                v[idx + 7] = v1[idx + 7].$op();
            }

            // do the rest
            for j in (chunks * 8)..n {
                v[j] = v1[j].$op();
            }

            v
        }
    };
}

makefn_vops_unary!(vln, ln);
makefn_vops_unary!(vln1p, ln_1p);
makefn_vops_unary!(vlog10, log10);
makefn_vops_unary!(vlog2, log2);
makefn_vops_unary!(vexp, exp);
makefn_vops_unary!(vexp2, exp2);
makefn_vops_unary!(vexpm1, exp_m1);
makefn_vops_unary!(vsin, sin);
makefn_vops_unary!(vcos, cos);
makefn_vops_unary!(vtan, tan);
makefn_vops_unary!(vsinh, sinh);
makefn_vops_unary!(vcosh, cosh);
makefn_vops_unary!(vtanh, tanh);
makefn_vops_unary!(vasin, asin);
makefn_vops_unary!(vacos, acos);
makefn_vops_unary!(vatan, atan);
makefn_vops_unary!(vasinh, asinh);
makefn_vops_unary!(vacosh, acosh);
makefn_vops_unary!(vatanh, atanh);
makefn_vops_unary!(vsqrt, sqrt);
makefn_vops_unary!(vcbrt, cbrt);
makefn_vops_unary!(vabs, abs);
makefn_vops_unary!(vfloor, floor);
makefn_vops_unary!(vceil, ceil);
makefn_vops_unary!(vtoradians, to_radians);
makefn_vops_unary!(vtodegrees, to_degrees);
makefn_vops_unary!(vrecip, recip);
makefn_vops_unary!(vround, round);
makefn_vops_unary!(vsignum, signum);

/// Single vector operations with a single argument.
macro_rules! makefn_vops_unary_with_arg_i {
    ($opname: ident, $op:ident, $argtype: ident) => {
        #[doc = "Implements a loop-unrolled version of the `"]
        #[doc = stringify!($op)]
        #[doc = "` function to be applied element-wise to a vector."]
        pub(crate) fn $opname(v1: &[f64], arg: $argtype) -> Vec<f64> {
            let n = v1.len();

            // let mut v = vec![0.; n];
            let mut v = Vec::with_capacity(n);
            unsafe {
                v.set_len(n);
            }
            let chunks = (n - (n % 8)) / 8;

            if arg == 2 {
                // unroll
                for i in 0..chunks {
                    let idx = i * 8;
                    assert!(n > idx + 7);
                    v[idx] = v1[idx] * v1[idx];
                    v[idx + 1] = v1[idx + 1] * v1[idx + 1];
                    v[idx + 2] = v1[idx + 2] * v1[idx + 2];
                    v[idx + 3] = v1[idx + 3] * v1[idx + 3];
                    v[idx + 4] = v1[idx + 4] * v1[idx + 4];
                    v[idx + 5] = v1[idx + 5] * v1[idx + 5];
                    v[idx + 6] = v1[idx + 6] * v1[idx + 6];
                    v[idx + 7] = v1[idx + 7] * v1[idx + 7];
                }
            } else if arg == 3 {
                for i in 0..chunks {
                    let idx = i * 8;
                    assert!(n > idx + 7);
                    v[idx] = v1[idx] * v1[idx] * v1[idx];
                    v[idx + 1] = v1[idx + 1] * v1[idx + 1] * v1[idx + 1];
                    v[idx + 2] = v1[idx + 2] * v1[idx + 2] * v1[idx + 2];
                    v[idx + 3] = v1[idx + 3] * v1[idx + 3] * v1[idx + 3];
                    v[idx + 4] = v1[idx + 4] * v1[idx + 4] * v1[idx + 4];
                    v[idx + 5] = v1[idx + 5] * v1[idx + 5] * v1[idx + 5];
                    v[idx + 6] = v1[idx + 6] * v1[idx + 6] * v1[idx + 6];
                    v[idx + 7] = v1[idx + 7] * v1[idx + 7] * v1[idx + 7];
                }
            } else {
                // unroll
                for i in 0..chunks {
                    let idx = i * 8;
                    assert!(n > idx + 7);
                    v[idx] = v1[idx].$op(arg);
                    v[idx + 1] = v1[idx + 1].$op(arg);
                    v[idx + 2] = v1[idx + 2].$op(arg);
                    v[idx + 3] = v1[idx + 3].$op(arg);
                    v[idx + 4] = v1[idx + 4].$op(arg);
                    v[idx + 5] = v1[idx + 5].$op(arg);
                    v[idx + 6] = v1[idx + 6].$op(arg);
                    v[idx + 7] = v1[idx + 7].$op(arg);
                }
            }

            // do the rest
            for j in (chunks * 8)..n {
                v[j] = v1[j].$op(arg);
            }

            v
        }
    };
}

macro_rules! makefn_vops_unary_with_arg_f {
    ($opname: ident, $op:ident, $argtype: ident) => {
        #[doc = "Implements a loop-unrolled version of the `"]
        #[doc = stringify!($op)]
        #[doc = "` function to be applied element-wise to a vector."]
        pub(crate) fn $opname(v1: &[f64], arg: $argtype) -> Vec<f64> {
            let n = v1.len();

            // let mut v = vec![0.; n];
            let mut v = Vec::with_capacity(n);
            unsafe {
                v.set_len(n);
            }
            let chunks = (n - (n % 8)) / 8;

            // unroll
            for i in 0..chunks {
                let idx = i * 8;
                assert!(n > idx + 7);
                v[idx] = v1[idx].$op(arg);
                v[idx + 1] = v1[idx + 1].$op(arg);
                v[idx + 2] = v1[idx + 2].$op(arg);
                v[idx + 3] = v1[idx + 3].$op(arg);
                v[idx + 4] = v1[idx + 4].$op(arg);
                v[idx + 5] = v1[idx + 5].$op(arg);
                v[idx + 6] = v1[idx + 6].$op(arg);
                v[idx + 7] = v1[idx + 7].$op(arg);
            }

            // do the rest
            for j in (chunks * 8)..n {
                v[j] = v1[j].$op(arg);
            }

            v
        }
    };
}

makefn_vops_unary_with_arg_i!(vpowi, powi, i32);
makefn_vops_unary_with_arg_f!(vpowf, powf, f64);

/// Vector-scalar operations.
macro_rules! makefn_vsops {
    ($opname: ident, $op:tt) => {
        #[doc = "Implements a loop-unrolled version of the `"]
        #[doc = stringify!($op)]
        #[doc = "` function to be applied element-wise between"]
        #[doc = "a vector and a scalar (in that order)."]
        pub(crate) fn $opname(v1: &[f64], scalar: f64) -> Vec<f64> {
            let n = v1.len();

            // let mut v = vec![0.; n];
            let mut v = Vec::with_capacity(n);
            unsafe {
                v.set_len(n);
            }
            let chunks = (n - (n % 8)) / 8;

            // unroll
            for i in 0..chunks {
                let idx = i * 8;
                assert!(n > idx + 7);
                v[idx] = v1[idx] $op scalar;
                v[idx + 1] = v1[idx + 1] $op scalar;
                v[idx + 2] = v1[idx + 2] $op scalar;
                v[idx + 3] = v1[idx + 3] $op scalar;
                v[idx + 4] = v1[idx + 4] $op scalar;
                v[idx + 5] = v1[idx + 5] $op scalar;
                v[idx + 6] = v1[idx + 6] $op scalar;
                v[idx + 7] = v1[idx + 7] $op scalar;
            }

            // do the rest
            for j in (chunks * 8)..n {
                v[j] = v1[j] $op scalar;
            }

            v
        }
    }
}

makefn_vsops!(vsadd, +);
makefn_vsops!(vssub, -);
makefn_vsops!(vsmul, *);
makefn_vsops!(vsdiv, /);

/// Vector-scalar mutating operations.
macro_rules! makefn_vsops_mut {
    ($opname: ident, $op:tt) => {
        #[doc = "Implements a loop-unrolled version of the `"]
        #[doc = stringify!($op)]
        #[doc = "` function to be applied element-wise between"]
        #[doc = "a vector and a scalar (in that order)."]
        pub(crate) fn $opname(v1: &mut [f64], scalar: f64) {
            let n = v1.len();

            let chunks = (n - (n % 8)) / 8;

            // unroll
            for i in 0..chunks {
                let idx = i * 8;
                assert!(n > idx + 7);
                v1[idx] $op scalar;
                v1[idx + 1] $op scalar;
                v1[idx + 2] $op scalar;
                v1[idx + 3] $op scalar;
                v1[idx + 4] $op scalar;
                v1[idx + 5] $op scalar;
                v1[idx + 6] $op scalar;
                v1[idx + 7] $op scalar;
            }

            // do the rest
            for j in (chunks * 8)..n {
                v1[j] $op scalar;
            }
        }
    }
}

makefn_vsops_mut!(vsadd_mut, +=);
makefn_vsops_mut!(vssub_mut, -=);
makefn_vsops_mut!(vsmul_mut, *=);
makefn_vsops_mut!(vsdiv_mut, /=);

/// Scalar-vector operations.
macro_rules! makefn_svops {
    ($opname: ident, $op:tt) => {
        #[doc = "Implements a loop-unrolled version of the `"]
        #[doc = stringify!($op)]
        #[doc = "` function to be applied element-wise between"]
        #[doc = "a scalar and a vector (in that order)."]
        pub(crate) fn $opname(scalar: f64, v1: &[f64]) -> Vec<f64> {
            let n = v1.len();

            // let mut v = vec![0.; n];
            let mut v = Vec::with_capacity(n);
            unsafe {
                v.set_len(n);
            }
            let chunks = (n - (n % 8)) / 8;

            // unroll
            for i in 0..chunks {
                let idx = i * 8;
                assert!(n > idx + 7);
                v[idx] = scalar $op v1[idx];
                v[idx + 1] = scalar $op v1[idx + 1];
                v[idx + 2] = scalar $op v1[idx + 2];
                v[idx + 3] = scalar $op v1[idx + 3];
                v[idx + 4] = scalar $op v1[idx + 4];
                v[idx + 5] = scalar $op v1[idx + 5];
                v[idx + 6] = scalar $op v1[idx + 6];
                v[idx + 7] = scalar $op v1[idx + 7];
            }

            // do the rest
            for j in (chunks * 8)..n {
                v[j] = scalar $op v1[j];
            }

            v
        }
    }
}

makefn_svops!(svadd, +);
makefn_svops!(svsub, -);
makefn_svops!(svmul, *);
makefn_svops!(svdiv, /);