diff --git a/lang/src/backend/hbvm.rs b/lang/src/backend/hbvm.rs
index b2b61fc69..61982d6bf 100644
--- a/lang/src/backend/hbvm.rs
+++ b/lang/src/backend/hbvm.rs
@@ -413,8 +413,15 @@ impl Nodes {
                             && self.is_const(self[o].inputs[2])
                             && op.cond_op(self[o].ty).is_none())
             }),
+            Kind::BinOp { op: TokenKind::Mul } if node.ty.is_float() => {
+                false
+                    && node.outputs.iter().all(|&n| {
+                        self[n].kind == Kind::BinOp { op: TokenKind::Add }
+                            && self[n].inputs[1] == nid
+                    })
+            }
             Kind::BinOp { op: TokenKind::Add | TokenKind::Sub } => {
-                self.is_locked(node.inputs[1])
+                (self.is_locked(node.inputs[1]) && !self[node.inputs[1]].ty.is_float())
                     || (self.is_const(node.inputs[2])
                         && node.outputs.iter().all(|&n| self.uses_direct_offset_of(n, nid, tys)))
             }
diff --git a/lang/src/backend/hbvm/regalloc.rs b/lang/src/backend/hbvm/regalloc.rs
index 89eccf839..0d080da19 100644
--- a/lang/src/backend/hbvm/regalloc.rs
+++ b/lang/src/backend/hbvm/regalloc.rs
@@ -348,6 +348,18 @@ impl HbvmBackend {
                             && let Some(op) = op.imm_binop(node.ty)
                         {
                             self.emit(op(atr(nid), atr(lhs), value as _));
+                        } else if node.kind == (Kind::BinOp { op: TokenKind::Add })
+                            && node.ty.is_float()
+                            && nodes.is_locked(lhs)
+                        {
+                            let fma = [instrs::fma32, instrs::fma64]
+                                [node.ty.simple_size().unwrap().ilog2() as usize - 2];
+                            self.emit(fma(
+                                atr(nid),
+                                atr(nodes[lhs].inputs[1]),
+                                atr(nodes[lhs].inputs[2]),
+                                atr(rhs),
+                            ));
                         } else if let Some(against) = op.cmp_against() {
                             let op_ty = nodes[rhs].ty;
                             let [dst, lhs, rhs] = [atr(nid), atr(lhs), atr(rhs)];