164 lines
4.2 KiB
JavaScript
Executable File
164 lines
4.2 KiB
JavaScript
Executable File
match= {
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reg: "(ibank|dbank|sp|r[0-3])",
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imm8: "~?#(0b[0-1]{1,8}|(0x)?[0-9]{1,3})",
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label: "[A-z][A-z0-9]*",
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flags: "(INPUT|OVERFLOW|NEGATIVE|CARRY|ZERO)"
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}
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instructions = {
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match: match,
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registers:[
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"ibank",
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"dbank",
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"sp",
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"r0",
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"r1",
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"r2",
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"r3"
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],
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flags:[
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"INPUT",
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"OVERFLOW",
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"NEGATIVE",
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"CARRY",
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"ZERO"
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],
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arg_patterns:[
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[
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{ pattern: [ match.reg, match.reg ], mode: 0 },
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{ pattern: [ match.reg, match.imm8 ], mode: 1 },
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],
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[
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{ pattern: [ match.reg ], mode: 0 }
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],
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[
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{ pattern: [ match.reg ], mode: 1 }
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],
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[
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{ pattern: [ match.flags, match.reg ], mode: 0 },
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{ pattern: [ match.flags, match.imm8 ], mode: 1 },
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],
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[
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{ pattern: [ match.reg ], mode: 0 },
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{ pattern: [ match.imm8 ], mode: 1 },
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],
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[
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{ pattern: [ ], mode: 0 }
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],
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[
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{ pattern: [ ], mode: 1 }
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]
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],
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opcodes:[
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{
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opcode: 0b0000,
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mnemonic:"add",
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patterns: 0,
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description: "Adds the immediate data, or the contents of the register given as the second operand to the register given as first operand."
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},
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{
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opcode: 0b0001,
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mnemonic:"sub",
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patterns: 0,
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description: "Subtracts the immediate data, or the contents of the register given as the third operand to the register given as the first operand."
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},
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{
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opcode:0b0010,
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mnemonic: "adc",
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patterns: 0,
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description: "Adds the two operands plus the carry flag, stores in the first operand register."
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},
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{
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opcode:0b0011,
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mnemonic:"subb",
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patterns:0,
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description: "Subtracts the second operand plus the carry flag from the first operand."
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},
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{
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opcode:0b0100,
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mnemonic:"nand",
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patterns:0,
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description:"Performs logical NAND on the two operands; stores in first operand register."
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},
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{
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opcode:0b0101,
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mnemonic: "xor",
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patterns:0,
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description:"Performs logical XOR on the two operands; stores in first operand register."
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},
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{
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opcode:0b0110,
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mnemonic:"sll",
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patterns:0,
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description:"Shifts bits in the first operand register left by the amount specified in the second operand."
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},
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{
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opcode:0b0111,
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mnemonic:"srl",
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patterns:0,
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description:"Shifts bits in the first operand register right by the amount specified in the second operand."
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},
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{
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opcode:0b1000,
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mnemonic:"mov",
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patterns:0,
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description: "Copies the register or data in the second operand into the first operand register."
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},
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{
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opcode:0b1001,
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mnemonic:"ldb",
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patterns:0,
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description:"Loads the byte into the first operand register at the address specified in the second operand."
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},
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{
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opcode:0b1010,
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mnemonic:"stb",
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patterns:0,
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description:"Stores the contents of the first operand register into the address specified in the second operand."
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},
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{
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opcode:0b1011,
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mnemonic:"push",
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patterns:1,
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description:"Pushes the contents of the specified register onto the stack."
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},
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{
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opcode:0b1011,
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mnemonic:"pop",
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patterns:2,
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description:"Pops the first item of the stack into the specified register"
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},
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{
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opcode:0b1100,
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mnemonic:"bflag",
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patterns:3,
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description: "Branches to the specified memory address if the specified flag bit is set."
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},
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{
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opcode:0b1101,
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mnemonic:"jmp",
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patterns:4,
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description:"Branches unconditionally to the specified memory address."
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},
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{
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opcode:0b1110,
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"menmonic":"jsr",
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patterns:4,
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description:"Branches unconditionally to the specified memory address and push the lower 8 bits of (program counter + 2) onto the stack."
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},
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{
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opcode:0b1111,
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mnemonic:"setipg",
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patterns:5,
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description:"Sets the instruction page register to the upper 8 bits of (program counter + 4)."
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},
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{
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opcode:0b1111,
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mnemonic:"ret",
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patterns:6,
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description:"Pulls the lower 8 bits of the return address from the stack and jumps to it."
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}
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]
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}
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