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cpu16dasm.cpp: Use util::sext to sign-extend 4-bit constants

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AJR 2023-08-27 10:52:48 -04:00
parent 1825256239
commit 59e8aef15e
1 changed files with 1 additions and 9 deletions
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10
src/devices/cpu/m68hc16/cpu16dasm.cpp
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@ -1294,15 +1294,7 @@ offs_t cpu16_disassembler::disassemble(std::ostream &stream, offs_t pc, const cp
case mode::XYO: case mode::XYO:
assert(page == 0); assert(page == 0);
util::stream_format(stream, "%-6s", info.m_name); util::stream_format(stream, "%-6s%d, %d", info.m_name, util::sext(opcode >> 4, 4), util::sext(opcode, 4));
if (BIT(opcode, 7))
util::stream_format(stream, "-%d, ", 8 - BIT(opcode, 4, 3));
else
util::stream_format(stream, "%d, ", BIT(opcode, 4, 3));
if (BIT(opcode, 3))
util::stream_format(stream, "-%d", 8 - BIT(opcode, 0, 3));
else
util::stream_format(stream, "%d", BIT(opcode, 0, 3));
return 2 | SUPPORTED | info.m_flags; return 2 | SUPPORTED | info.m_flags;
case mode::IND: case mode::IND: