1 files changed, 114 insertions, 1 deletions
diff --git a/src/common.svh b/src/common.svh
index 42fdb71..67a87d2 100644
--- a/src/common.svh
+++ b/src/common.svh
@@ -1,6 +1,119 @@
 `ifndef __COMMON_SVH__
 `define __COMMON_SVH__
 
-`define NOP 0
+`define RV_OP_FIELD 6:0
+typedef logic [31:0] rv_t;
+typedef logic [31:0] xlen_t;
+
+typedef struct packed {
+	logic [6:0] funct7;
+	logic [4:0] rs2;
+	logic [4:0] rs1;
+	logic [2:0] funct3;
+	logic [4:0] rd;
+	logic [6:0] op;
+} rtype_t;
+
+typedef struct packed {
+	logic [11:0] imm;
+	logic [4:0] rs1;
+	logic [2:0] funct3;
+	logic [4:0] rd;
+	logic [6:0] op;
+} itype_t;
+
+typedef struct packed {
+	logic [6:0] imm1;
+	logic [4:0] rs2;
+	logic [4:0] rs1;
+	logic [2:0] funct3;
+	logic [4:0] imm0;
+	logic [6:0] op;
+} stype_t;
+
+typedef struct packed {
+	logic [0:0] imm3;
+	logic [5:0] imm2;
+	logic [4:0] rs2;
+	logic [4:0] rs1;
+	logic [2:0] funct3;
+	logic [3:0] imm1;
+	logic [0:0] imm0;
+	logic [6:0] op;
+} btype_t;
+
+typedef struct packed {
+	logic [19:0] imm;
+	logic [4:0] rd;
+	logic [6:0] op;
+} utype_t;
+
+typedef struct packed {
+	logic [0:0] imm3;
+	logic [9:0] imm2;
+	logic [0:0] imm1;
+	logic [7:0] imm0;
+	logic [4:0] rd;
+	logic [6:0] op;
+} jtype_t;
+
+typedef enum logic [6:0] {
+	LOAD      = 7'b0000011,
+	LOAD_FP   = 7'b0000111,
+	MISC_MEM  = 7'b0001111,
+	OP_IMM    = 7'b0010011,
+	AUIPC     = 7'b0010111,
+	OP_IMM_32 = 7'b0011011,
+
+	STORE     = 7'b0100011,
+	STORE_FP  = 7'b0100111,
+	AMO       = 7'b0101111,
+	OP        = 7'b0110011,
+	LUI       = 7'b0110111,
+	OP_32     = 7'b0111011,
+
+	MADD     = 7'b1000011,
+	MSUB     = 7'b1000111,
+	NMSUB    = 7'b1001011,
+	NMADD    = 7'b1001111,
+	OP_FP    = 7'b1010011,
+
+	BRANCH   = 7'b1100011,
+	JALR     = 7'b1100111,
+	JAL      = 7'b1101111,
+	SYSTEM   = 7'b1110011
+} opcode_t;
+
+typedef logic[7:0] port_t;
+
+typedef enum port_t {
+	NOP = 8'b00000000,
+	REG = 8'b00100000,
+	ALU = 8'b01000000
+} port_base_t;
+
+typedef struct packed {
+	port_t src;
+	port_t dst;
+} mov_t;
+
+typedef logic[7:0] op_t;
+typedef logic[19:0] imm_t;
+
+typedef struct packed {
+	mov_t[1:0] in;
+	mov_t out;
+	op_t op;
+	imm_t imm;
+} insn_t;
+
+typedef enum op_t {
+	ALU_ADD,
+	ALU_SUB,
+	ALU_ADDI
+} alu_op_t;
+
+`define rn(r) (REG + port_t'(r))
+`define alu(fu) (ALU + port_t'(fu))
 
 `endif /* __COMMON_SVH__ */