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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "context_arm.h"
#include "object.h"
#include "runtime_support.h"
namespace art {
namespace arm {
ArmContext::ArmContext() {
#ifndef NDEBUG
// Initialize registers with easy to spot debug values
for (int i = 0; i < 16; i++) {
gprs_[i] = 0xEBAD6070+i;
}
for (int i = 0; i < 32; i++) {
fprs_[i] = 0xEBAD8070+i;
}
#endif
}
void ArmContext::FillCalleeSaves(const Frame& fr) {
Method* method = fr.GetMethod();
uint32_t core_spills = method->GetCoreSpillMask();
uint32_t fp_core_spills = method->GetFpSpillMask();
size_t spill_count = __builtin_popcount(core_spills);
size_t fp_spill_count = __builtin_popcount(fp_core_spills);
if (spill_count > 0) {
// Lowest number spill is furthest away, walk registers and fill into context
int j = 1;
for (int i = 0; i < 16; i++) {
if (((core_spills >> i) & 1) != 0) {
gprs_[i] = fr.LoadCalleeSave(spill_count - j);
j++;
}
}
}
if (fp_spill_count > 0) {
// Lowest number spill is furthest away, walk registers and fill into context
int j = 1;
for (int i = 0; i < 32; i++) {
if (((fp_core_spills >> i) & 1) != 0) {
fprs_[i] = fr.LoadCalleeSave(spill_count + fp_spill_count - j);
j++;
}
}
}
}
void ArmContext::DoLongJump() {
#if defined(__arm__)
art_do_long_jump(&gprs_[0], &fprs_[S0]);
#else
UNIMPLEMENTED(FATAL);
#endif
}
} // namespace arm
} // namespace art
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