diff --git a/src/eval_context.rs b/src/eval_context.rs
index b0c01aed9e13..713c01602c78 100644
--- a/src/eval_context.rs
+++ b/src/eval_context.rs
@@ -359,51 +359,6 @@ impl<'a, 'tcx> EvalContext<'a, 'tcx> {
         Ok(())
     }
 
-    fn binop_with_overflow(
-        &mut self,
-        op: mir::BinOp,
-        left: &mir::Operand<'tcx>,
-        right: &mir::Operand<'tcx>,
-    ) -> EvalResult<'tcx, (PrimVal, bool)> {
-        let left_ty    = self.operand_ty(left);
-        let right_ty   = self.operand_ty(right);
-        let left_kind  = self.ty_to_primval_kind(left_ty)?;
-        let right_kind = self.ty_to_primval_kind(right_ty)?;
-        let left_val   = self.eval_operand_to_primval(left)?;
-        let right_val  = self.eval_operand_to_primval(right)?;
-        operator::binary_op(op, left_val, left_kind, right_val, right_kind)
-    }
-
-    /// Applies the binary operation `op` to the two operands and writes a tuple of the result
-    /// and a boolean signifying the potential overflow to the destination.
-    pub(super) fn intrinsic_with_overflow(
-        &mut self,
-        op: mir::BinOp,
-        left: &mir::Operand<'tcx>,
-        right: &mir::Operand<'tcx>,
-        dest: Lvalue<'tcx>,
-        dest_ty: Ty<'tcx>,
-    ) -> EvalResult<'tcx, ()> {
-        let (val, overflowed) = self.binop_with_overflow(op, left, right)?;
-        let val = Value::ByValPair(val, PrimVal::from_bool(overflowed));
-        self.write_value(val, dest, dest_ty)
-    }
-
-    /// Applies the binary operation `op` to the arguments and writes the result to the
-    /// destination. Returns `true` if the operation overflowed.
-    pub(super) fn intrinsic_overflowing(
-        &mut self,
-        op: mir::BinOp,
-        left: &mir::Operand<'tcx>,
-        right: &mir::Operand<'tcx>,
-        dest: Lvalue<'tcx>,
-        dest_ty: Ty<'tcx>,
-    ) -> EvalResult<'tcx, bool> {
-        let (val, overflowed) = self.binop_with_overflow(op, left, right)?;
-        self.write_primval(dest, val, dest_ty)?;
-        Ok(overflowed)
-    }
-
     fn assign_fields<I: IntoIterator<Item = u64>>(
         &mut self,
         dest: Lvalue<'tcx>,
diff --git a/src/operator.rs b/src/operator.rs
index 5a6182d0be76..6e656d69f655 100644
--- a/src/operator.rs
+++ b/src/operator.rs
@@ -1,10 +1,14 @@
 use rustc::mir;
+use rustc::ty::Ty;
 
 use error::{EvalError, EvalResult};
+use eval_context::EvalContext;
+use lvalue::Lvalue;
 use memory::Pointer;
 use value::{
     PrimVal,
     PrimValKind,
+    Value,
     bits_to_f32,
     bits_to_f64,
     f32_to_bits,
@@ -12,6 +16,53 @@ use value::{
     bits_to_bool,
 };
 
+impl<'a, 'tcx> EvalContext<'a, 'tcx> {
+    fn binop_with_overflow(
+        &mut self,
+        op: mir::BinOp,
+        left: &mir::Operand<'tcx>,
+        right: &mir::Operand<'tcx>,
+    ) -> EvalResult<'tcx, (PrimVal, bool)> {
+        let left_ty    = self.operand_ty(left);
+        let right_ty   = self.operand_ty(right);
+        let left_kind  = self.ty_to_primval_kind(left_ty)?;
+        let right_kind = self.ty_to_primval_kind(right_ty)?;
+        let left_val   = self.eval_operand_to_primval(left)?;
+        let right_val  = self.eval_operand_to_primval(right)?;
+        binary_op(op, left_val, left_kind, right_val, right_kind)
+    }
+
+    /// Applies the binary operation `op` to the two operands and writes a tuple of the result
+    /// and a boolean signifying the potential overflow to the destination.
+    pub(super) fn intrinsic_with_overflow(
+        &mut self,
+        op: mir::BinOp,
+        left: &mir::Operand<'tcx>,
+        right: &mir::Operand<'tcx>,
+        dest: Lvalue<'tcx>,
+        dest_ty: Ty<'tcx>,
+    ) -> EvalResult<'tcx, ()> {
+        let (val, overflowed) = self.binop_with_overflow(op, left, right)?;
+        let val = Value::ByValPair(val, PrimVal::from_bool(overflowed));
+        self.write_value(val, dest, dest_ty)
+    }
+
+    /// Applies the binary operation `op` to the arguments and writes the result to the
+    /// destination. Returns `true` if the operation overflowed.
+    pub(super) fn intrinsic_overflowing(
+        &mut self,
+        op: mir::BinOp,
+        left: &mir::Operand<'tcx>,
+        right: &mir::Operand<'tcx>,
+        dest: Lvalue<'tcx>,
+        dest_ty: Ty<'tcx>,
+    ) -> EvalResult<'tcx, bool> {
+        let (val, overflowed) = self.binop_with_overflow(op, left, right)?;
+        self.write_primval(dest, val, dest_ty)?;
+        Ok(overflowed)
+    }
+}
+
 macro_rules! overflow {
     ($op:ident, $l:expr, $r:expr) => ({
         let (val, overflowed) = $l.$op($r);