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Add 'call' instruction

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This commit is contained in:
Jason Turner 2021-05-12 07:51:58 -06:00
parent 905e850abb
commit a6f012878e
1 changed files with 12 additions and 0 deletions
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12
src/6502-c++.cpp
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@ -95,6 +95,7 @@ struct AVR : ASMLine
brne, brne,
brsh, brsh,
call,
clr, clr,
com, com,
cp, cp,
@ -155,6 +156,7 @@ struct AVR : ASMLine
if (o == "rol") { return OpCode::rol; } if (o == "rol") { return OpCode::rol; }
if (o == "ror") { return OpCode::ror; } if (o == "ror") { return OpCode::ror; }
if (o == "rcall") { return OpCode::rcall; } if (o == "rcall") { return OpCode::rcall; }
if (o == "call") { return OpCode::call; }
if (o == "ld") { return OpCode::ld; } if (o == "ld") { return OpCode::ld; }
if (o == "sub") { return OpCode::sub; } if (o == "sub") { return OpCode::sub; }
if (o == "subi") { return OpCode::subi; } if (o == "subi") { return OpCode::subi; }
@ -355,9 +357,19 @@ void translate_instruction(const Personality &personality, std::vector<mos6502>
case AVR::OpCode::ror: case AVR::OpCode::ror:
instructions.emplace_back(mos6502::OpCode::ror, personality.get_register(o1_reg_num)); instructions.emplace_back(mos6502::OpCode::ror, personality.get_register(o1_reg_num));
return; return;
case AVR::OpCode::call:
if (o1.value != ".") {
instructions.emplace_back(mos6502::OpCode::jsr, o1);
return;
}
throw std::runtime_error("Unhandled call");
case AVR::OpCode::rcall: case AVR::OpCode::rcall:
if (o1.value != ".") { if (o1.value != ".") {
instructions.emplace_back(mos6502::OpCode::jsr, o1); instructions.emplace_back(mos6502::OpCode::jsr, o1);
} else {
// just push in 2 bytes
instructions.emplace_back(mos6502::OpCode::pha);
instructions.emplace_back(mos6502::OpCode::pha);
} }
return; return;