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common/bit_util: Replace CLZ/CTZ operations with standardized ones

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Makes for less code that we need to maintain.
This commit is contained in:
Lioncash
2021-01-15 02:02:57 -05:00
parent c8bf0caca0
commit 8620de6b20
10 changed files with 17 additions and 113 deletions
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4
src/video_core/cdma_pusher.cpp
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@ -18,10 +18,10 @@
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#include <bit>
#include "command_classes/host1x.h"
#include "command_classes/nvdec.h"
#include "command_classes/vic.h"
#include "common/bit_util.h"
#include "video_core/cdma_pusher.h"
#include "video_core/command_classes/nvdec_common.h"
#include "video_core/engines/maxwell_3d.h"
@ -56,7 +56,7 @@ void CDmaPusher::Step() {
for (const u32 value : values) {
if (mask != 0) {
const u32 lbs = Common::CountTrailingZeroes32(mask);
const auto lbs = static_cast<u32>(std::countr_zero(mask));
mask &= ~(1U << lbs);
ExecuteCommand(static_cast<u32>(offset + lbs), value);
continue;

2
src/video_core/cdma_pusher.h
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@ -126,7 +126,7 @@ private:
s32 count{};
s32 offset{};
s32 mask{};
u32 mask{};
bool incrementing{};
// Queue of command lists to be processed

4
src/video_core/command_classes/codecs/h264.cpp
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@ -19,7 +19,7 @@
//
#include <array>
#include "common/bit_util.h"
#include <bit>
#include "video_core/command_classes/codecs/h264.h"
#include "video_core/gpu.h"
#include "video_core/memory_manager.h"
@ -266,7 +266,7 @@ void H264BitWriter::WriteExpGolombCodedInt(s32 value) {
}
void H264BitWriter::WriteExpGolombCodedUInt(u32 value) {
const s32 size = 32 - Common::CountLeadingZeroes32(static_cast<s32>(value + 1));
const s32 size = 32 - std::countl_zero(value + 1);
WriteBits(1, size);
value -= (1U << (size - 1)) - 1;