1 files changed, 8 insertions, 0 deletions
diff --git a/compiler/rustc_const_eval/src/interpret/machine.rs b/compiler/rustc_const_eval/src/interpret/machine.rs
index e22629993fb..1725635e0b4 100644
--- a/compiler/rustc_const_eval/src/interpret/machine.rs
+++ b/compiler/rustc_const_eval/src/interpret/machine.rs
@@ -289,6 +289,9 @@ pub trait Machine<'tcx>: Sized {
         a
     }
 
+    /// Determines whether the `fmuladd` intrinsics fuse the multiply-add or use separate operations.
+    fn float_fuse_mul_add(_ecx: &mut InterpCx<'tcx, Self>) -> bool;
+
     /// Called before a basic block terminator is executed.
     #[inline]
     fn before_terminator(_ecx: &mut InterpCx<'tcx, Self>) -> InterpResult<'tcx> {
@@ -673,6 +676,11 @@ pub macro compile_time_machine(<$tcx: lifetime>) {
     }
 
     #[inline(always)]
+    fn float_fuse_mul_add(_ecx: &mut InterpCx<$tcx, Self>) -> bool {
+        true
+    }
+
+    #[inline(always)]
     fn ub_checks(_ecx: &InterpCx<$tcx, Self>) -> InterpResult<$tcx, bool> {
         // We can't look at `tcx.sess` here as that can differ across crates, which can lead to
         // unsound differences in evaluating the same constant at different instantiation sites.