diff --git a/constants.py b/constants.py
index 1298aa7b..0f4e7771 100644
--- a/constants.py
+++ b/constants.py
@@ -165,8 +165,10 @@
     'srli_rv32',
     'umax32',
     'c_mop_1',
+    'c_sspush_x1',
     'c_mop_3',
     'c_mop_5',
+    'c_sspopchk_x5',
     'c_mop_7',
     'c_mop_9',
     'c_mop_11',
@@ -201,6 +203,9 @@
     'mop_r_26',
     'mop_r_27',
     'mop_r_28',
+    'sspopchk_x1',
+    'sspopchk_x5',
+    'ssrdp',
     'mop_r_29',
     'mop_r_30',
     'mop_r_31',
@@ -213,4 +218,6 @@
     'mop_rr_5',
     'mop_rr_6',
     'mop_rr_7',
+    'sspush_x1',
+    'sspush_x5',
 ]