diff --git a/rvfi/insns/README.md b/rvfi/insns/README.md
index 1c5de27..5382933 100644
--- a/rvfi/insns/README.md
+++ b/rvfi/insns/README.md
@@ -102,12 +102,19 @@ Below is a list of instructions currently supported by this port of the riscv-fo
       - `InsnSlliw`: SLLIW instruction
       - `InsnSrliw`: SRLIW instruction
       - `InsnSraiw`: SRAIW instruction
+  - `InsnRV64IRType`: RV64I R-Type Instruction
+    - `InsnAddw`: ADDW instruction
+    - `InsnSubw`: SUBW instruction
+    - `InsnSllw`: SLLW instruction
+    - `InsnSrlw`: SRLW instruction
+    - `InsnSraw`: SRAW instruction
   - `InsnSd`: SD instruction
 
 ### ISAs
 
 - `IsaRV32I`: RV32I Base ISA
 - `IsaRV32M`: RV32M Standard Extension
+- `IsaRV64I`: RV64I Base ISA
 
 ## Core-specific parameters