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added parse_rs_rs_imm method to InstructionSet, used for branch instructions

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Anton Lydike 2021-04-19 08:53:35 +02:00
parent d40c80cb81
commit 1abeab6f2d
1 changed files with 14 additions and 0 deletions
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14
riscemu/instructions/InstructionSet.py
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@ -78,6 +78,20 @@ class InstructionSet(ABC):
to_unsigned(self.get_reg_content(ins, 1)), \
to_unsigned(ins.get_imm(2))
def parse_rs_rs_imm(self, ins: 'LoadedInstruction', signed=True) -> Tuple[int, int, int]:
"""
Assumes the command is in <name> rs1, rs2, imm format
Returns the values in rs1, rs2 and the immediate imm
"""
if signed:
return self.get_reg_content(ins, 0), \
self.get_reg_content(ins, 1), \
ins.get_imm(2)
else:
return to_unsigned(self.get_reg_content(ins, 0)), \
to_unsigned(self.get_reg_content(ins, 1)), \
to_unsigned(ins.get_imm(2))
def get_reg_content(self, ins: 'LoadedInstruction', ind: int) -> int:
"""
get the register name from ins and then return the register contents