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Implement thumb1_SUB_reg

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This commit is contained in:
MerryMage 2016-07-08 18:49:30 +08:00
parent df0c324923
commit 92142d5a22
8 changed files with 59 additions and 2 deletions
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8
src/frontend/ir_emitter.cpp
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@ -106,6 +106,14 @@ IREmitter::ResultAndCarryAndOverflow IREmitter::AddWithCarry(IR::ValuePtr a, IR:
return {result, carry_out, overflow};
}
IREmitter::ResultAndCarryAndOverflow IREmitter::SubWithCarry(IR::ValuePtr a, IR::ValuePtr b, IR::ValuePtr carry_in) {
// This is equivalent to AddWithCarry(a, Not(b), carry_in).
auto result = Inst(IR::Opcode::SubWithCarry, {a, b, carry_in});
auto carry_out = Inst(IR::Opcode::GetCarryFromOp, {result});
auto overflow = Inst(IR::Opcode::GetOverflowFromOp, {result});
return {result, carry_out, overflow};
}
IR::ValuePtr IREmitter::And(IR::ValuePtr a, IR::ValuePtr b) {
return Inst(IR::Opcode::And, {a, b});
}