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Implement Thumb PUSH instruction

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This commit is contained in:
MerryMage 2016-07-18 15:11:16 +01:00
parent 9109b226af
commit f7e3d7b8d2
10 changed files with 191 additions and 54 deletions
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41
src/backend_x64/reg_alloc.cpp
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@ -106,7 +106,7 @@ Gen::X64Reg RegAlloc::UseRegister(IR::Value* use_value, std::initializer_list<Ho
} else if (HostLocIsRegister(current_location)) {
ASSERT(hostloc_state[current_location] == HostLocState::Idle);
code->XCHG(32, Gen::R(hostloc_to_x64.at(current_location)), Gen::R(hostloc_to_x64.at(new_location)));
code->XCHG(32, Gen::R(hostloc_to_x64.at(new_location)), Gen::R(hostloc_to_x64.at(current_location)));
hostloc_state[new_location] = HostLocState::Use;
std::swap(hostloc_to_value[new_location], hostloc_to_value[current_location]);
@ -118,6 +118,43 @@ Gen::X64Reg RegAlloc::UseRegister(IR::Value* use_value, std::initializer_list<Ho
return hostloc_to_x64.at(new_location);
}
Gen::X64Reg RegAlloc::UseScratchRegister(IR::Value* use_value, std::initializer_list<HostLoc> desired_locations) {
ASSERT(std::all_of(desired_locations.begin(), desired_locations.end(), HostLocIsRegister));
ASSERT_MSG(remaining_uses.find(use_value) != remaining_uses.end(), "use_value has not been defined");
ASSERT_MSG(!ValueLocations(use_value).empty(), "use_value has not been defined");
ASSERT_MSG(remaining_uses[use_value] != 0, "use_value ran out of uses. (Use-d an IR::Value* too many times)");
HostLoc current_location = ValueLocations(use_value).front();
HostLoc new_location = SelectARegister(desired_locations);
if (HostLocIsSpill(current_location)) {
if (IsRegisterOccupied(new_location)) {
SpillRegister(new_location);
}
code->MOV(32, Gen::R(hostloc_to_x64.at(new_location)), SpillToOpArg(current_location));
hostloc_state[new_location] = HostLocState::Scratch;
remaining_uses[use_value]--;
} else if (HostLocIsRegister(current_location)) {
ASSERT(hostloc_state[current_location] == HostLocState::Idle);
if (IsRegisterOccupied(new_location)) {
SpillRegister(new_location);
}
code->MOV(32, Gen::R(hostloc_to_x64.at(new_location)), Gen::R(hostloc_to_x64.at(current_location)));
hostloc_state[new_location] = HostLocState::Scratch;
remaining_uses[use_value]--;
} else {
ASSERT_MSG(0, "Invalid current_location");
}
return hostloc_to_x64.at(new_location);
}
Gen::X64Reg RegAlloc::ScratchRegister(std::initializer_list<HostLoc> desired_locations) {
ASSERT(std::all_of(desired_locations.begin(), desired_locations.end(), HostLocIsRegister));
@ -161,7 +198,7 @@ void RegAlloc::HostCall(IR::Value* result_def, IR::Value* arg0_use, IR::Value* a
for (size_t i = 0; i < AbiArgs.size(); i++) {
if (args[i]) {
UseRegister(args[i], {AbiArgs[i]});
UseScratchRegister(args[i], {AbiArgs[i]});
} else {
ScratchRegister({AbiArgs[i]});
}