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add type of recognition

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This commit is contained in:
water
2020-10-03 15:27:17 -04:00
parent 649a8879e5
commit b7cee7b666
4 changed files with 249 additions and 27 deletions
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decompiler/IR/BasicOpBuilder.cpp
+31 -1
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@@ -695,6 +695,17 @@ BranchDelay get_branch_delay(Instruction& i, int idx) {
BranchDelay b(BranchDelay::SET_REG_TRUE);
b.destination = make_reg(i.get_dst(0).get_reg(), idx);
return b;
} else if (i.kind == InstructionKind::LW && i.get_src(1).is_reg(make_gpr(Reg::S7)) &&
i.get_src(0).is_sym()) {
if (i.get_src(0).get_sym() == "binteger") {
BranchDelay b(BranchDelay::SET_BINTEGER);
b.destination = make_reg(i.get_dst(0).get_reg(), idx);
return b;
} else if (i.get_src(0).get_sym() == "pair") {
BranchDelay b(BranchDelay::SET_PAIR);
b.destination = make_reg(i.get_dst(0).get_reg(), idx);
return b;
}
}
BranchDelay b(BranchDelay::UNKNOWN);
return b;
@@ -737,7 +748,13 @@ std::shared_ptr<IR> try_beql(Instruction& instr, Instruction& next_instr, int id
return std::make_shared<IR_Branch>(
Condition(Condition::FALSE, make_reg(instr.get_src(1).get_reg(), idx), nullptr, nullptr),
instr.get_src(2).get_label(), get_branch_delay(next_instr, idx), true);
} else if (instr.kind == InstructionKind::BEQL) {
} else if (instr.kind == InstructionKind::BEQL && instr.get_src(1).is_reg(make_gpr(Reg::R0))) {
return std::make_shared<IR_Branch>(
Condition(Condition::ZERO, make_reg(instr.get_src(0).get_reg(), idx), nullptr, nullptr),
instr.get_src(2).get_label(), get_branch_delay(next_instr, idx), true);
}
else if (instr.kind == InstructionKind::BEQL) {
return std::make_shared<IR_Branch>(
Condition(Condition::EQUAL, make_reg(instr.get_src(0).get_reg(), idx),
make_reg(instr.get_src(1).get_reg(), idx), nullptr),
@@ -765,6 +782,16 @@ std::shared_ptr<IR> try_beq(Instruction& instr, Instruction& next_instr, int idx
return nullptr;
}
std::shared_ptr<IR> try_bgtzl(Instruction& instr, Instruction& next_instr, int idx) {
if (instr.kind == InstructionKind::BGTZL) {
return std::make_shared<IR_Branch>(
Condition(Condition::GREATER_THAN_ZERO_SIGNED, make_reg(instr.get_src(0).get_reg(), idx),
nullptr, nullptr),
instr.get_src(1).get_label(), get_branch_delay(next_instr, idx), true);
}
return nullptr;
}
std::shared_ptr<IR> try_daddiu(Instruction& i0, Instruction& i1, int idx) {
if (i0.kind == InstructionKind::DADDIU && i1.kind == InstructionKind::MOVN &&
i0.get_src(0).get_reg() == make_gpr(Reg::S7)) {
@@ -1219,6 +1246,9 @@ void add_basic_ops_to_block(Function* func, const BasicBlock& block, LinkedObjec
case InstructionKind::BEQ:
result = try_beq(i, next, instr);
break;
case InstructionKind::BGTZL:
result = try_bgtzl(i, next, instr);
break;
case InstructionKind::BEQL:
result = try_beql(i, next, instr);
break;