auto merge of #13415 : thestinger/rust/f128, r=alexcrichton

This currently requires linking against a library like libquadmath (or
libgcc), because compiler-rt barely has any support for this and most
hardware does not yet have 128-bit precision floating point. For this
reason, it's currently hidden behind a feature gate.

When compiler-rt is updated to trunk, some tests can be added for
constant evaluation since there will be support for the comparison
operators.

Closes #13381

1 files changed, 8 insertions, 0 deletions

diff --git a/src/libstd/reflect.rs b/src/libstd/reflect.rs
index e64a6b86d02..45f214e26fb 100644
--- a/src/libstd/reflect.rs
+++ b/src/libstd/reflect.rs
@@ -176,6 +176,14 @@ impl<V:TyVisitor + MovePtr> TyVisitor for MovePtrAdaptor<V> {
         true
     }
 
+    #[cfg(not(stage0))]
+    fn visit_f128(&mut self) -> bool {
+        self.align_to::<f128>();
+        if ! self.inner.visit_f128() { return false; }
+        self.bump_past::<f128>();
+        true
+    }
+
     fn visit_char(&mut self) -> bool {
         self.align_to::<char>();
         if ! self.inner.visit_char() { return false; }