diff --git a/src/int/mod.rs b/src/int/mod.rs
index 8a469d90..128fdfdc 100644
--- a/src/int/mod.rs
+++ b/src/int/mod.rs
@@ -188,6 +188,7 @@ macro_rules! int_impl {
     };
 }
 
+int_impl!(i16, u16, 16);
 int_impl!(i32, u32, 32);
 int_impl!(i64, u64, 64);
 int_impl!(i128, u128, 128);
@@ -229,6 +230,8 @@ macro_rules! large_int {
     };
 }
 
+large_int!(u32, u16, u16, 16);
+large_int!(i32, u16, i16, 16);
 large_int!(u64, u32, u32, 32);
 large_int!(i64, u32, i32, 32);
 large_int!(u128, u64, u64, 64);
diff --git a/src/int/shift.rs b/src/int/shift.rs
index 408f8f3c..674c3ee8 100644
--- a/src/int/shift.rs
+++ b/src/int/shift.rs
@@ -20,6 +20,7 @@ trait Ashl: Int + LargeInt {
     }
 }
 
+impl Ashl for u32 {}
 impl Ashl for u64 {}
 impl Ashl for u128 {}
 
@@ -47,6 +48,7 @@ trait Ashr: Int + LargeInt {
     }
 }
 
+impl Ashr for i32 {}
 impl Ashr for i64 {}
 impl Ashr for i128 {}
 
@@ -70,10 +72,16 @@ trait Lshr: Int + LargeInt {
     }
 }
 
+impl Lshr for u32 {}
 impl Lshr for u64 {}
 impl Lshr for u128 {}
 
 intrinsics! {
+    #[maybe_use_optimized_c_shim]
+    pub extern "C" fn __ashlsi3(a: u32, b: u32) -> u32 {
+        a.ashl(b)
+    }
+
     #[maybe_use_optimized_c_shim]
     #[arm_aeabi_alias = __aeabi_llsl]
     pub extern "C" fn __ashldi3(a: u64, b: u32) -> u64 {
@@ -84,6 +92,11 @@ intrinsics! {
         a.ashl(b)
     }
 
+    #[maybe_use_optimized_c_shim]
+    pub extern "C" fn __ashrsi3(a: i32, b: u32) -> i32 {
+        a.ashr(b)
+    }
+
     #[maybe_use_optimized_c_shim]
     #[arm_aeabi_alias = __aeabi_lasr]
     pub extern "C" fn __ashrdi3(a: i64, b: u32) -> i64 {
@@ -94,6 +107,11 @@ intrinsics! {
         a.ashr(b)
     }
 
+    #[maybe_use_optimized_c_shim]
+    pub extern "C" fn __lshrsi3(a: u32, b: u32) -> u32 {
+        a.lshr(b)
+    }
+
     #[maybe_use_optimized_c_shim]
     #[arm_aeabi_alias = __aeabi_llsr]
     pub extern "C" fn __lshrdi3(a: u64, b: u32) -> u64 {
diff --git a/testcrate/build.rs b/testcrate/build.rs
index e1d4cf9e..5a91a120 100644
--- a/testcrate/build.rs
+++ b/testcrate/build.rs
@@ -857,6 +857,10 @@ fn main() {
     );
 
     // int/shift.rs
+    gen(
+        |(a, b): (MyU32, MyU32)| Some(a.0 << (b.0 % 32)),
+        "builtins::int::shift::__ashlsi3(a, b % 32)",
+    );
     gen(
         |(a, b): (MyU64, MyU32)| Some(a.0 << (b.0 % 64)),
         "builtins::int::shift::__ashldi3(a, b % 64)",
@@ -865,6 +869,10 @@ fn main() {
         |(a, b): (MyU128, MyU32)| Some(a.0 << (b.0 % 128)),
         "builtins::int::shift::__ashlti3(a, b % 128)",
     );
+    gen(
+        |(a, b): (MyI32, MyU32)| Some(a.0 >> (b.0 % 32)),
+        "builtins::int::shift::__ashrsi3(a, b % 32)",
+    );
     gen(
         |(a, b): (MyI64, MyU32)| Some(a.0 >> (b.0 % 64)),
         "builtins::int::shift::__ashrdi3(a, b % 64)",
@@ -873,6 +881,10 @@ fn main() {
         |(a, b): (MyI128, MyU32)| Some(a.0 >> (b.0 % 128)),
         "builtins::int::shift::__ashrti3(a, b % 128)",
     );
+    gen(
+        |(a, b): (MyU32, MyU32)| Some(a.0 >> (b.0 % 32)),
+        "builtins::int::shift::__lshrsi3(a, b % 32)",
+    );
     gen(
         |(a, b): (MyU64, MyU32)| Some(a.0 >> (b.0 % 64)),
         "builtins::int::shift::__lshrdi3(a, b % 64)",
@@ -1285,6 +1297,7 @@ my_integer! {
     struct MyI32(i32);
     struct MyI64(i64);
     struct MyI128(i128);
+    struct MyU16(u16);
     struct MyU32(u32);
     struct MyU64(u64);
     struct MyU128(u128);