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This commit is contained in:
water
2020-10-04 11:37:47 -04:00
parent 4b90634e93
commit f70ae6dad3
5 changed files with 104 additions and 25 deletions
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decompiler/IR/BasicOpBuilder.cpp
+18
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@@ -723,6 +723,11 @@ BranchDelay get_branch_delay(Instruction& i, int idx) {
b.source = make_reg(i.get_src(0).get_reg(), idx);
b.source2 = make_reg(i.get_src(1).get_reg(), idx);
return b;
} else if (is_gpr_3(i, InstructionKind::DSUBU, {}, make_gpr(Reg::R0), {})) {
BranchDelay b(BranchDelay::NEGATE);
b.destination = make_reg(i.get_dst(0).get_reg(), idx);
b.source = make_reg(i.get_src(1).get_reg(), idx);
return b;
}
BranchDelay b(BranchDelay::UNKNOWN);
return b;
@@ -819,6 +824,16 @@ std::shared_ptr<IR> try_bgezl(Instruction& instr, Instruction& next_instr, int i
return nullptr;
}
std::shared_ptr<IR> try_bltzl(Instruction& instr, Instruction& next_instr, int idx) {
if (instr.kind == InstructionKind::BLTZL) {
return std::make_shared<IR_Branch>(
Condition(Condition::LESS_THAN_ZERO, 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)) {
@@ -1279,6 +1294,9 @@ void add_basic_ops_to_block(Function* func, const BasicBlock& block, LinkedObjec
case InstructionKind::BGEZL:
result = try_bgezl(i, next, instr);
break;
case InstructionKind::BLTZL:
result = try_bltzl(i, next, instr);
break;
case InstructionKind::BEQL:
result = try_beql(i, next, instr);
break;