Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 274 insertions, 0 deletions

diff --git a/third_party/rust/rand/src/distributions/integer.rs b/third_party/rust/rand/src/distributions/integer.rs
new file mode 100644
index 0000000000..19ce71599c
--- /dev/null
+++ b/third_party/rust/rand/src/distributions/integer.rs
@@ -0,0 +1,274 @@
+// Copyright 2018 Developers of the Rand project.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! The implementations of the `Standard` distribution for integer types.
+
+use crate::distributions::{Distribution, Standard};
+use crate::Rng;
+#[cfg(all(target_arch = "x86", feature = "simd_support"))]
+use core::arch::x86::{__m128i, __m256i};
+#[cfg(all(target_arch = "x86_64", feature = "simd_support"))]
+use core::arch::x86_64::{__m128i, __m256i};
+use core::num::{NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU8, NonZeroUsize,
+    NonZeroU128};
+#[cfg(feature = "simd_support")] use packed_simd::*;
+
+impl Distribution<u8> for Standard {
+    #[inline]
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> u8 {
+        rng.next_u32() as u8
+    }
+}
+
+impl Distribution<u16> for Standard {
+    #[inline]
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> u16 {
+        rng.next_u32() as u16
+    }
+}
+
+impl Distribution<u32> for Standard {
+    #[inline]
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> u32 {
+        rng.next_u32()
+    }
+}
+
+impl Distribution<u64> for Standard {
+    #[inline]
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> u64 {
+        rng.next_u64()
+    }
+}
+
+impl Distribution<u128> for Standard {
+    #[inline]
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> u128 {
+        // Use LE; we explicitly generate one value before the next.
+        let x = u128::from(rng.next_u64());
+        let y = u128::from(rng.next_u64());
+        (y << 64) | x
+    }
+}
+
+impl Distribution<usize> for Standard {
+    #[inline]
+    #[cfg(any(target_pointer_width = "32", target_pointer_width = "16"))]
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> usize {
+        rng.next_u32() as usize
+    }
+
+    #[inline]
+    #[cfg(target_pointer_width = "64")]
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> usize {
+        rng.next_u64() as usize
+    }
+}
+
+macro_rules! impl_int_from_uint {
+    ($ty:ty, $uty:ty) => {
+        impl Distribution<$ty> for Standard {
+            #[inline]
+            fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> $ty {
+                rng.gen::<$uty>() as $ty
+            }
+        }
+    };
+}
+
+impl_int_from_uint! { i8, u8 }
+impl_int_from_uint! { i16, u16 }
+impl_int_from_uint! { i32, u32 }
+impl_int_from_uint! { i64, u64 }
+impl_int_from_uint! { i128, u128 }
+impl_int_from_uint! { isize, usize }
+
+macro_rules! impl_nzint {
+    ($ty:ty, $new:path) => {
+        impl Distribution<$ty> for Standard {
+            fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> $ty {
+                loop {
+                    if let Some(nz) = $new(rng.gen()) {
+                        break nz;
+                    }
+                }
+            }
+        }
+    };
+}
+
+impl_nzint!(NonZeroU8, NonZeroU8::new);
+impl_nzint!(NonZeroU16, NonZeroU16::new);
+impl_nzint!(NonZeroU32, NonZeroU32::new);
+impl_nzint!(NonZeroU64, NonZeroU64::new);
+impl_nzint!(NonZeroU128, NonZeroU128::new);
+impl_nzint!(NonZeroUsize, NonZeroUsize::new);
+
+#[cfg(feature = "simd_support")]
+macro_rules! simd_impl {
+    ($(($intrinsic:ident, $vec:ty),)+) => {$(
+        impl Distribution<$intrinsic> for Standard {
+            #[inline]
+            fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> $intrinsic {
+                $intrinsic::from_bits(rng.gen::<$vec>())
+            }
+        }
+    )+};
+
+    ($bits:expr,) => {};
+    ($bits:expr, $ty:ty, $($ty_more:ty,)*) => {
+        simd_impl!($bits, $($ty_more,)*);
+
+        impl Distribution<$ty> for Standard {
+            #[inline]
+            fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> $ty {
+                let mut vec: $ty = Default::default();
+                unsafe {
+                    let ptr = &mut vec;
+                    let b_ptr = &mut *(ptr as *mut $ty as *mut [u8; $bits/8]);
+                    rng.fill_bytes(b_ptr);
+                }
+                vec.to_le()
+            }
+        }
+    };
+}
+
+#[cfg(feature = "simd_support")]
+simd_impl!(16, u8x2, i8x2,);
+#[cfg(feature = "simd_support")]
+simd_impl!(32, u8x4, i8x4, u16x2, i16x2,);
+#[cfg(feature = "simd_support")]
+simd_impl!(64, u8x8, i8x8, u16x4, i16x4, u32x2, i32x2,);
+#[cfg(feature = "simd_support")]
+simd_impl!(128, u8x16, i8x16, u16x8, i16x8, u32x4, i32x4, u64x2, i64x2,);
+#[cfg(feature = "simd_support")]
+simd_impl!(256, u8x32, i8x32, u16x16, i16x16, u32x8, i32x8, u64x4, i64x4,);
+#[cfg(feature = "simd_support")]
+simd_impl!(512, u8x64, i8x64, u16x32, i16x32, u32x16, i32x16, u64x8, i64x8,);
+#[cfg(all(
+    feature = "simd_support",
+    any(target_arch = "x86", target_arch = "x86_64")
+))]
+simd_impl!((__m128i, u8x16), (__m256i, u8x32),);
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_integers() {
+        let mut rng = crate::test::rng(806);
+
+        rng.sample::<isize, _>(Standard);
+        rng.sample::<i8, _>(Standard);
+        rng.sample::<i16, _>(Standard);
+        rng.sample::<i32, _>(Standard);
+        rng.sample::<i64, _>(Standard);
+        rng.sample::<i128, _>(Standard);
+
+        rng.sample::<usize, _>(Standard);
+        rng.sample::<u8, _>(Standard);
+        rng.sample::<u16, _>(Standard);
+        rng.sample::<u32, _>(Standard);
+        rng.sample::<u64, _>(Standard);
+        rng.sample::<u128, _>(Standard);
+    }
+
+    #[test]
+    fn value_stability() {
+        fn test_samples<T: Copy + core::fmt::Debug + PartialEq>(zero: T, expected: &[T])
+        where Standard: Distribution<T> {
+            let mut rng = crate::test::rng(807);
+            let mut buf = [zero; 3];
+            for x in &mut buf {
+                *x = rng.sample(Standard);
+            }
+            assert_eq!(&buf, expected);
+        }
+
+        test_samples(0u8, &[9, 247, 111]);
+        test_samples(0u16, &[32265, 42999, 38255]);
+        test_samples(0u32, &[2220326409, 2575017975, 2018088303]);
+        test_samples(0u64, &[
+            11059617991457472009,
+            16096616328739788143,
+            1487364411147516184,
+        ]);
+        test_samples(0u128, &[
+            296930161868957086625409848350820761097,
+            145644820879247630242265036535529306392,
+            111087889832015897993126088499035356354,
+        ]);
+        #[cfg(any(target_pointer_width = "32", target_pointer_width = "16"))]
+        test_samples(0usize, &[2220326409, 2575017975, 2018088303]);
+        #[cfg(target_pointer_width = "64")]
+        test_samples(0usize, &[
+            11059617991457472009,
+            16096616328739788143,
+            1487364411147516184,
+        ]);
+
+        test_samples(0i8, &[9, -9, 111]);
+        // Skip further i* types: they are simple reinterpretation of u* samples
+
+        #[cfg(feature = "simd_support")]
+        {
+            // We only test a sub-set of types here and make assumptions about the rest.
+
+            test_samples(u8x2::default(), &[
+                u8x2::new(9, 126),
+                u8x2::new(247, 167),
+                u8x2::new(111, 149),
+            ]);
+            test_samples(u8x4::default(), &[
+                u8x4::new(9, 126, 87, 132),
+                u8x4::new(247, 167, 123, 153),
+                u8x4::new(111, 149, 73, 120),
+            ]);
+            test_samples(u8x8::default(), &[
+                u8x8::new(9, 126, 87, 132, 247, 167, 123, 153),
+                u8x8::new(111, 149, 73, 120, 68, 171, 98, 223),
+                u8x8::new(24, 121, 1, 50, 13, 46, 164, 20),
+            ]);
+
+            test_samples(i64x8::default(), &[
+                i64x8::new(
+                    -7387126082252079607,
+                    -2350127744969763473,
+                    1487364411147516184,
+                    7895421560427121838,
+                    602190064936008898,
+                    6022086574635100741,
+                    -5080089175222015595,
+                    -4066367846667249123,
+                ),
+                i64x8::new(
+                    9180885022207963908,
+                    3095981199532211089,
+                    6586075293021332726,
+                    419343203796414657,
+                    3186951873057035255,
+                    5287129228749947252,
+                    444726432079249540,
+                    -1587028029513790706,
+                ),
+                i64x8::new(
+                    6075236523189346388,
+                    1351763722368165432,
+                    -6192309979959753740,
+                    -7697775502176768592,
+                    -4482022114172078123,
+                    7522501477800909500,
+                    -1837258847956201231,
+                    -586926753024886735,
+                ),
+            ]);
+        }
+    }
+}