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-rw-r--r--mppa_k1c/Machregs.v5
1 files changed, 4 insertions, 1 deletions
diff --git a/mppa_k1c/Machregs.v b/mppa_k1c/Machregs.v
index cd8c6606..6e0efe28 100644
--- a/mppa_k1c/Machregs.v
+++ b/mppa_k1c/Machregs.v
@@ -213,7 +213,10 @@ Global Opaque
Definition two_address_op (op: operation) : bool :=
match op with
- | Omadd | Omaddimm _ | Omaddl | Omaddlimm _
+ | Omadd | Omaddimm _
+ | Omaddl | Omaddlimm _
+ | Omsub | Omsubimm _
+ | Omsubl | Omsublimm _
| Oselect _ | Oselectl _ | Oselectf _ | Oselectfs _
| Oinsf _ _ | Oinsfl _ _ => true
| _ => false