From 29c5e52574e3461249df2da305eed4bca82fd993 Mon Sep 17 00:00:00 2001
From: Donald Sebastian Leung <dl@m-labs.hk>
Date: Fri, 31 Jul 2020 11:56:22 +0800
Subject: [PATCH] Categorize RV32IM instructions by type

---
 insns/insn_types.md | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 insns/insn_types.md

diff --git a/insns/insn_types.md b/insns/insn_types.md
new file mode 100644
index 0000000..5228a1f
--- /dev/null
+++ b/insns/insn_types.md
@@ -0,0 +1,11 @@
+# RV32IM Instruction Types
+
+| Instruction type | Instructions |
+| --- | --- |
+| U-type | lui, auipc |
+| UJ-type | jal |
+| I-type | jalr, lb, lh, lw, lbu, lhu, addi, slti, sltiu, xori, ori, andi |
+| SB-type | beq, bne, blt, bge, bltu, bgeu |
+| S-type | sb, sh, sw |
+| I-type (shift variation) | slli, srli, srai |
+| R-type | add, sub, sll, slt, sltu, xor, srl, sra, or, and, mul, mulh, mulhsu, mulhu, div, divu, rem, remu |