1 files changed, 73 insertions, 0 deletions
diff --git a/vendor/crypto-bigint/src/limb/shl.rs b/vendor/crypto-bigint/src/limb/shl.rs
new file mode 100644
index 000000000..c0003ddbb
--- /dev/null
+++ b/vendor/crypto-bigint/src/limb/shl.rs
@@ -0,0 +1,73 @@
+//! Limb left bitshift
+
+use crate::{Limb, Word};
+use core::ops::{Shl, ShlAssign};
+
+impl Limb {
+    /// Computes `self << rhs`.
+    #[inline(always)]
+    pub const fn shl(self, rhs: Self) -> Self {
+        Limb(self.0 << rhs.0)
+    }
+}
+
+impl Shl for Limb {
+    type Output = Self;
+
+    #[inline(always)]
+    fn shl(self, rhs: Self) -> Self::Output {
+        self.shl(rhs)
+    }
+}
+
+impl Shl<usize> for Limb {
+    type Output = Self;
+
+    #[inline(always)]
+    fn shl(self, rhs: usize) -> Self::Output {
+        self.shl(Limb(rhs as Word))
+    }
+}
+
+impl ShlAssign for Limb {
+    #[inline(always)]
+    fn shl_assign(&mut self, other: Self) {
+        *self = self.shl(other);
+    }
+}
+
+impl ShlAssign<usize> for Limb {
+    #[inline(always)]
+    fn shl_assign(&mut self, other: usize) {
+        *self = self.shl(Limb(other as Word));
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::Limb;
+
+    #[test]
+    fn shl1() {
+        assert_eq!(Limb(1) << 1, Limb(2));
+    }
+
+    #[test]
+    fn shl2() {
+        assert_eq!(Limb(1) << 2, Limb(4));
+    }
+
+    #[test]
+    fn shl_assign1() {
+        let mut l = Limb(1);
+        l <<= 1;
+        assert_eq!(l, Limb(2));
+    }
+
+    #[test]
+    fn shl_assign2() {
+        let mut l = Limb(1);
+        l <<= 2;
+        assert_eq!(l, Limb(4));
+    }
+}