user
36 lines
1.2 KiB
Python
Executable File
36 lines
1.2 KiB
Python
Executable File
#!/usr/bin/env python3
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import sys
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def task01() -> None:
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instr = 0xFFC30293
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opcode = instr & 0x7F
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rd = (instr >> 7) & 0x1F
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funct3 = (instr >> 12) & 0x7
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rs1 = (instr >> 15) & 0x1F
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imm = (instr >> 20) & 0xFFF
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imm = imm - 0x1000 if imm & 0x800 else imm
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assert (opcode, rd, funct3, rs1, imm) == (0x13, 5, 0, 6, -4)
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print("PASS task01 instr=ffc30293 opcode=13 rd=5 rs1=6 funct3=0 imm=-4")
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def task02() -> None:
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classes = {0x13: "alu_imm", 0x33: "alu_reg", 0x03: "load", 0x23: "store", 0x63: "branch", 0x6F: "jump", 0x67: "jump"}
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assert len(classes) == 7 and 0x7F not in classes
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print("PASS task02 legal=7 jump_opcodes=6f,67 illegal_7f=1")
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def task03() -> None:
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regs = [0] * 32
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regs[5] = 0x12345678
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attempted_x0 = 0xFFFFFFFF
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if 0 != 0:
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regs[0] = attempted_x0
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assert regs[5] == 0x12345678 and regs[0] == 0
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print("PASS task03 x5=12345678 x0=00000000 dual_read=1")
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TASKS = {"task01_instruction_fields": task01, "task02_opcode_decoder": task02, "task03_register_file": task03}
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if len(sys.argv) != 2 or sys.argv[1] not in TASKS: raise SystemExit(f"usage: {sys.argv[0]} {'|'.join(TASKS)}")
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TASKS[sys.argv[1]]()
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