diff options
Diffstat (limited to 'atk16_asm/asm_ops.py')
| -rw-r--r-- | atk16_asm/asm_ops.py | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/atk16_asm/asm_ops.py b/atk16_asm/asm_ops.py index 3198d4c..65cf0da 100644 --- a/atk16_asm/asm_ops.py +++ b/atk16_asm/asm_ops.py @@ -124,7 +124,7 @@ def expand_jpr(addr_reg: str) -> ExpandResult: @register_primitive def make_jpi(meta: Meta, symbols: Symbols, imm: int | str) -> int: """JPI 0110 XXXI IIII IIII""" - imm_e = eval_expr(symbols, str(imm), bits=9) + imm_e = eval_expr(symbols, str(imm), bits=16) imm_e = imm_e - meta.address - 1 if imm_e < -(2 ** 8) or imm_e >= 2 ** 8: @@ -157,8 +157,12 @@ def expand_brr(flag_s: str, addr_reg: str) -> ExpandResult: def make_bri(meta: Meta, symbols: Symbols, flag_s: str, imm: int | str) -> int: """BRI 1000 XFFI IIII IIII""" flag_s_e = eval_expr(symbols, flag_s, bits=2) - imm_e = eval_expr(symbols, str(imm), bits=9) + imm_e = eval_expr(symbols, str(imm), bits=16) imm_e = imm_e - meta.address - 1 + + if imm_e < -(2 ** 8) or imm_e >= 2 ** 8: + raise Exception(f"jpi imm value is not representable in 9 bits: {imm_e}") + imm_e = imm_e & (0b111111111) word = (0b1000 << 12) + \ (flag_s_e << 9) + \ |