mirror of
https://github.com/sxpert/hp-saturn
synced 2024-11-16 19:50:19 +01:00
132 lines
No EOL
2.6 KiB
Verilog
132 lines
No EOL
2.6 KiB
Verilog
`ifndef _DEF_ALU
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`define _DEF_ALU
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// stuff (where should that go ?)
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`define T_SET 0
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`define T_TEST 1
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`define T_DIR_OUT 0
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`define T_DIR_IN 1
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`define T_PTR_0 0
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`define T_PTR_1 1
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`define FT_NONE 0
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`define FT_A_B 1
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`define FT_F 2
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`define FT_FIELD_P 0
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`define FT_FIELD_WP 1
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`define FT_FIELD_XS 2
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`define FT_FIELD_X 3
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`define FT_FIELD_S 4
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`define FT_FIELD_M 5
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`define FT_FIELD_B 6
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`define FT_FIELD_W 7
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`define FT_FIELD_NONE 14
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`define FT_FIELD_A 15
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/*
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*
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* Opcodes for the ALU
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*
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*/
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// copy / exchange
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`define ALU_OP_ZERO 0
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`define ALU_OP_COPY 1
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`define ALU_OP_EXCH 2
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// shifts
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`define ALU_OP_SHL 3
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`define ALU_OP_SHR 4
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// logic
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`define ALU_OP_AND 5
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`define ALU_OP_OR 6
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// bit set/reset
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`define ALU_OP_RST_BIT 7
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`define ALU_OP_SET_BIT 8
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// arithmetic
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`define ALU_OP_2CMPL 9
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`define ALU_OP_1CMPL 10
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`define ALU_OP_INC 11
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`define ALU_OP_DEC 12
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`define ALU_OP_ADD 13
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`define ALU_OP_SUB 14
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// tests
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`define ALU_OP_TEST_EQ 15
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`define ALU_OP_TEST_NEQ 16
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// relative jump
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`define ALU_OP_JMP_REL2 17
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`define ALU_OP_JMP_REL3 18
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`define ALU_OP_JMP_REL4 19
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`define ALU_OP_JMP_ABS5 20
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`define ALU_OP_CLR_MASK 21
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`define ALU_OP_SET_CRY 28
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`define ALU_OP_TEST_GO 30
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`define ALU_OP_NOP 31
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/*
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*
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* Registers
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*
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*/
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`define ALU_REG_A 0
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`define ALU_REG_B 1
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`define ALU_REG_C 2
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`define ALU_REG_D 3
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`define ALU_REG_D0 4
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`define ALU_REG_D1 5
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`define ALU_REG_PC 6
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`define ALU_REG_RSTK 7
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`define ALU_REG_R0 8
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`define ALU_REG_R1 9
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`define ALU_REG_R2 10
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`define ALU_REG_R3 11
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`define ALU_REG_R4 12
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//13
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//14
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//15
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`define ALU_REG_DAT0 16
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`define ALU_REG_DAT1 17
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`define ALU_REG_HST 18
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`define ALU_REG_ST 19
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`define ALU_REG_P 20
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`define ALU_REG_M 21
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`define ALU_REG_IMM 22
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`define ALU_REG_ADDR 23
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`define ALU_REG_ZERO 30
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`define ALU_REG_NONE 31
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// specific bits
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`define ALU_HST_XM 0
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`define ALU_HST_SB 1
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`define ALU_HST_SR 2
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`define ALU_HST_MP 3
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/*
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*
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* instruction types
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*
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*/
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`define INSTR_TYPE_NOP 0
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`define INSTR_TYPE_ALU 1
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`define INSTR_TYPE_SET_MODE 2
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`define INSTR_TYPE_JUMP 3
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`define INSTR_TYPE_RTN 4
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`define INSTR_TYPE_LOAD_LENGTH 5
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`define INSTR_TYPE_LOAD 6
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`define INSTR_TYPE_MEM_READ 7
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`define INSTR_TYPE_MEM_WRITE 8
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`define INSTR_TYPE_CONFIG 9
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`define INSTR_TYPE_RESET 10
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`define INSTR_TYPE_NONE 15
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`endif |