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sigma2: Use util::sext in disassembler

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This commit is contained in:
AJR 2022-11-17 10:22:52 -05:00
parent 52e284e556
commit f73845fb01
1 changed files with 2 additions and 2 deletions
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4
src/devices/cpu/sigma2/sigma2d.cpp
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@ -92,7 +92,7 @@ offs_t sigma2_disassembler::dasm_memory_reference(std::ostream &stream, offs_t p
if (BIT(inst, 11))
{
// Self-relative addressing
util::stream_format(stream, "X'%04X'", (pc + (inst & 0x00ff) - (inst & 0x0100)) & 0xffff);
util::stream_format(stream, "X'%04X'", (pc + util::sext(inst, 9)) & 0xffff);
if (BIT(inst, 9))
stream << ',' << m_reg_names[4];
}
@ -341,7 +341,7 @@ offs_t sigma2_disassembler::disassemble(std::ostream &stream, offs_t pc, const d
if ((inst & 0xf000) == 0x6000)
{
// Conditional branch instructions use self-relative addressing only
util::stream_format(stream, "%-8sX'%04X'", s_bc_names[BIT(inst, 9, 3)], (pc + (inst & 0x00ff) - (inst & 0x0100)) & 0xffff);
util::stream_format(stream, "%-8sX'%04X'", s_bc_names[BIT(inst, 9, 3)], (pc + util::sext(inst, 9)) & 0xffff);
return 1 | STEP_COND | SUPPORTED;
}
else if ((inst & 0xf000) == 0x7000)