insns/insn_types.md

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+# 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 |