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[decoder] removed sign extension for CSR type instructions

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This commit is contained in:
Anton Lydike 2021-06-08 11:31:58 +02:00
parent c25b9f2343
commit 639f91b192
1 changed files with 5 additions and 1 deletions
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6
riscemu/decoder/formats.py
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@ -98,6 +98,10 @@ def decode_i_shamt(ins: int) -> List[int]:
return decode_i(ins)
def decode_i_unsigned(ins: int) -> List[int]:
return [rd(ins), rs1(ins), imm110(ins)]
INSTRUCTION_ARGS_DECODER: Dict[int, Callable[[int], List[int]]] = {
0x00: decode_i,
0x04: decode_i_shamt,
@ -108,5 +112,5 @@ INSTRUCTION_ARGS_DECODER: Dict[int, Callable[[int], List[int]]] = {
0x18: decode_b,
0x19: decode_i,
0x1b: decode_j,
0x1c: decode_i
0x1c: decode_i_unsigned
}