svgb/rtl/cpu/cpu_pkg.svh

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package cpu_pkg;
typedef enum logic [2:0] {
REG8_B = 3'h00,
REG8_C = 3'h01,
REG8_D = 3'h02,
REG8_E = 3'h03,
REG8_H = 3'h04,
REG8_L = 3'h05,
REG8_PHL = 3'h06,
REG8_A = 3'h07
} reg8_t;
typedef enum logic [1:0] {
REG16_BC = 2'h00,
REG16_DE = 2'h01,
REG16_HL = 2'h02,
REG16_SP_AF = 2'h03
} reg16_t;
typedef enum logic [1:0] {
CC_NZ = 2'h00,
CC_Z = 2'h01,
CC_NC = 2'h02,
CC_C = 2'h03
} cc_t;
typedef enum logic [2:0] {
ALU_OP_ADD = 3'h00,
ALU_OP_ADC = 3'h01,
ALU_OP_SUB = 3'h02,
ALU_OP_SBC = 3'h03,
ALU_OP_AND = 3'h04,
ALU_OP_XOR = 3'h05,
ALU_OP_OR = 3'h06,
ALU_OP_CP = 3'h07
} alu_op_t;
typedef enum logic [2:0] {
SHIFT_OP_RLC = 3'h00,
SHIFT_OP_RRC = 3'h01,
SHIFT_OP_RL = 3'h02,
SHIFT_OP_RR = 3'h03,
SHIFT_OP_SLA = 3'h04,
SHIFT_OP_SRA = 3'h05,
SHIFT_OP_SLL = 3'h06,
SHIFT_OP_SRL = 3'h07
} shift_op_t;
typedef struct packed {
logic b;
logic s;
logic r;
logic [2:0] operand;
} bsr_op_t;
typedef struct packed {
logic inc;
logic dec;
logic dst_a;
} incdec_op_t;
typedef struct packed {
logic update_a;
logic update_f;
logic alu_op_valid;
alu_op_t alu_op;
logic shift_op_valid;
shift_op_t shift_op;
logic bsr_op_valid;
bsr_op_t bsr_op;
logic incdec_op_valid;
incdec_op_t incdec_op;
} alu_ctrl_t;
typedef enum {
ADDR_SRC_PC,
ADDR_SRC_SP,
ADDR_SRC_REG16, // TODO reuse BUS_Q
ADDR_SRC_REG8, // TODO reuse BUS_Q
ADDR_SRC_OPERAND8,
ADDR_SRC_OPERAND16,
ADDR_SRC_BUS_P,
ADDR_SRC_BUS_Q
} addr_src_t;
typedef enum {
BUS_SRC_A,
BUS_SRC_F,
BUS_SRC_REG8,
BUS_SRC_OPERAND8_H,
BUS_SRC_OPERAND8_L,
BUS_SRC_ALU,
BUS_SRC_MEM,
BUS_SRC_PC_H,
BUS_SRC_PC_L,
BUS_SRC_REG16_H,
BUS_SRC_REG16_L
} bus_src_t;
typedef enum {
BUS_DST_SP_H,
BUS_DST_SP_L,
BUS_DST_ALU,
BUS_DST_REG8,
BUS_DST_REG16_H,
BUS_DST_REG16_L,
BUS_DST_PC_H,
BUS_DST_PC_L,
BUS_DST_MEM
} bus_dst_t;
typedef struct packed {
bus_src_t src;
bus_dst_t dst;
logic wen;
} bus_ctrl_t;
typedef enum {
BUS16_SRC_REG16,
BUS16_SRC_ALU16,
BUS16_SRC_SP
} bus16_src_t;
typedef enum {
BUS16_DST_REG16,
BUS16_DST_ALU16,
BUS16_DST_SP
} bus16_dst_t;
typedef struct packed {
bus16_src_t src;
bus16_dst_t dst;
logic wen;
} bus16_ctrl_t;
typedef enum {
PC_SRC_INC,
PC_SRC_OPERAND8,
PC_SRC_OPERAND16,
PC_SRC_BUS
} pc_src_t;
endpackage : cpu_pkg