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Use a 64-bit bitmap rather than a 32-bit bitmap.

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This commit is contained in:
Dr. Chat
2015-12-28 10:52:22 -06:00
committed by Ben Vanik
parent 764dcba75a
commit 6108ff1608
3 changed files with 25 additions and 24 deletions
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26
src/xenia/base/bit_map.cc
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@@ -19,18 +19,18 @@ BitMap::BitMap() = default;
BitMap::BitMap(size_t size_bits) { Resize(size_bits); }
BitMap::BitMap(uint32_t* data, size_t size_bits) {
assert_true(size_bits % 32 == 0);
BitMap::BitMap(uint64_t* data, size_t size_bits) {
assert_true(size_bits % kDataSizeBits == 0);
data_.resize(size_bits / 32);
std::memcpy(data_.data(), data, size_bits / 32);
data_.resize(size_bits / kDataSizeBits);
std::memcpy(data_.data(), data, size_bits / kDataSizeBits);
}
size_t BitMap::Acquire() {
for (size_t i = 0; i < data_.size(); i++) {
uint32_t entry = 0;
uint32_t new_entry = 0;
int acquired_idx = -1;
uint64_t entry = 0;
uint64_t new_entry = 0;
int64_t acquired_idx = -1;
do {
entry = data_[i];
@@ -42,7 +42,7 @@ size_t BitMap::Acquire() {
}
// Entry has a free bit. Acquire it.
uint32_t bit = 1 << (kDataSizeBits - index - 1);
uint64_t bit = 1ull << (kDataSizeBits - index - 1);
new_entry = entry & ~bit;
assert_not_zero(entry & bit);
@@ -62,10 +62,10 @@ void BitMap::Release(size_t index) {
auto slot = index / kDataSizeBits;
index -= slot * kDataSizeBits;
uint32_t bit = 1 << (kDataSizeBits - index - 1);
uint64_t bit = 1ull << (kDataSizeBits - index - 1);
uint32_t entry = 0;
uint32_t new_entry = 0;
uint64_t entry = 0;
uint64_t new_entry = 0;
do {
entry = data_[slot];
assert_zero(entry & bit);
@@ -76,8 +76,8 @@ void BitMap::Release(size_t index) {
void BitMap::Resize(size_t new_size_bits) {
auto old_size = data_.size();
assert_true(new_size_bits % 32 == 0);
data_.resize(new_size_bits / 32);
assert_true(new_size_bits % kDataSizeBits == 0);
data_.resize(new_size_bits / kDataSizeBits);
// Initialize new entries.
if (data_.size() > old_size) {