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Handle retl to some extent

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This commit is contained in:
Jason Turner 2016-09-08 18:57:10 -06:00
parent 03d360ac56
commit aa9657f0b8
1 changed files with 11 additions and 1 deletions
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12
src/main.cpp
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@ -346,7 +346,8 @@ struct i386 : ASMLine
pushl, pushl,
sbbb, sbbb,
negb, negb,
notb notb,
retl
}; };
static OpCode parse_opcode(Type t, const std::string &o) static OpCode parse_opcode(Type t, const std::string &o)
@ -391,6 +392,7 @@ struct i386 : ASMLine
if (o == "negb") return OpCode::negb; if (o == "negb") return OpCode::negb;
if (o == "sbbb") return OpCode::sbbb; if (o == "sbbb") return OpCode::sbbb;
if (o == "pushl") return OpCode::pushl; if (o == "pushl") return OpCode::pushl;
if (o == "retl") return OpCode::retl;
} }
} }
throw std::runtime_error("Unknown opcode: " + o); throw std::runtime_error("Unknown opcode: " + o);
@ -463,6 +465,10 @@ void translate_instruction(std::vector<mos6502> &instructions, const i386::OpCod
case i386::OpCode::ret: case i386::OpCode::ret:
instructions.emplace_back(mos6502::OpCode::rts); instructions.emplace_back(mos6502::OpCode::rts);
break; break;
case i386::OpCode::retl:
/// \todo I don't know if this is completely correct for retl translation
instructions.emplace_back(mos6502::OpCode::rts);
break;
case i386::OpCode::movl: case i386::OpCode::movl:
if (o1.type == Operand::Type::reg && o2.type == Operand::Type::reg) { if (o1.type == Operand::Type::reg && o2.type == Operand::Type::reg) {
instructions.emplace_back(mos6502::OpCode::lda, get_register(o1.reg_num)); instructions.emplace_back(mos6502::OpCode::lda, get_register(o1.reg_num));
@ -557,6 +563,10 @@ void translate_instruction(std::vector<mos6502> &instructions, const i386::OpCod
// ands the values // ands the values
instructions.emplace_back(mos6502::OpCode::lda, Operand(o1.type, fixup_8bit_literal(o1.value))); instructions.emplace_back(mos6502::OpCode::lda, Operand(o1.type, fixup_8bit_literal(o1.value)));
instructions.emplace_back(mos6502::OpCode::bit, get_register(o2.reg_num)); instructions.emplace_back(mos6502::OpCode::bit, get_register(o2.reg_num));
} else if (o1.type == Operand::Type::literal && o2.type == Operand::Type::literal) {
// ands the values
instructions.emplace_back(mos6502::OpCode::lda, Operand(o1.type, fixup_8bit_literal(o1.value)));
instructions.emplace_back(mos6502::OpCode::bit, o2);
} else { } else {
throw std::runtime_error("Cannot translate testb instruction"); throw std::runtime_error("Cannot translate testb instruction");
} }