diff --git a/compiler/rustc_ast/src/ast.rs b/compiler/rustc_ast/src/ast.rs
index 31dd358ad51..970e35221e1 100644
--- a/compiler/rustc_ast/src/ast.rs
+++ b/compiler/rustc_ast/src/ast.rs
@@ -1909,22 +1909,28 @@ pub struct FnSig {
 #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
 #[derive(Encodable, Decodable, HashStable_Generic)]
 pub enum FloatTy {
+    F16,
     F32,
     F64,
+    F128,
 }
 
 impl FloatTy {
     pub fn name_str(self) -> &'static str {
         match self {
+            FloatTy::F16 => "f16",
             FloatTy::F32 => "f32",
             FloatTy::F64 => "f64",
+            FloatTy::F128 => "f128",
         }
     }
 
     pub fn name(self) -> Symbol {
         match self {
+            FloatTy::F16 => sym::f16,
             FloatTy::F32 => sym::f32,
             FloatTy::F64 => sym::f64,
+            FloatTy::F128 => sym::f128,
         }
     }
 }
diff --git a/compiler/rustc_middle/src/ty/mod.rs b/compiler/rustc_middle/src/ty/mod.rs
index 6fdb03c0bab..f005a240504 100644
--- a/compiler/rustc_middle/src/ty/mod.rs
+++ b/compiler/rustc_middle/src/ty/mod.rs
@@ -1991,8 +1991,10 @@ pub fn uint_ty(uty: ast::UintTy) -> UintTy {
 
 pub fn float_ty(fty: ast::FloatTy) -> FloatTy {
     match fty {
+        ast::FloatTy::F16 => FloatTy::F16,
         ast::FloatTy::F32 => FloatTy::F32,
         ast::FloatTy::F64 => FloatTy::F64,
+        ast::FloatTy::F128 => FloatTy::F128,
     }
 }