From 8620de6b2030bef35360d029354f672cde8978f1 Mon Sep 17 00:00:00 2001 From: Lioncash Date: Fri, 15 Jan 2021 02:02:57 -0500 Subject: common/bit_util: Replace CLZ/CTZ operations with standardized ones Makes for less code that we need to maintain. --- src/common/bit_util.h | 76 -------------------------- src/core/hle/kernel/k_priority_queue.h | 4 +- src/core/hle/kernel/k_scheduler.cpp | 8 ++- src/core/hle/kernel/memory/page_heap.h | 4 +- src/core/hle/kernel/process_capability.cpp | 4 +- src/tests/CMakeLists.txt | 1 - src/tests/common/bit_utils.cpp | 23 -------- src/video_core/cdma_pusher.cpp | 4 +- src/video_core/cdma_pusher.h | 2 +- src/video_core/command_classes/codecs/h264.cpp | 4 +- 10 files changed, 17 insertions(+), 113 deletions(-) delete mode 100644 src/tests/common/bit_utils.cpp diff --git a/src/common/bit_util.h b/src/common/bit_util.h index 29f59a9a3..685e7fc9b 100644 --- a/src/common/bit_util.h +++ b/src/common/bit_util.h @@ -21,82 +21,6 @@ template return sizeof(T) * CHAR_BIT; } -#ifdef _MSC_VER -[[nodiscard]] inline u32 CountLeadingZeroes32(u32 value) { - unsigned long leading_zero = 0; - - if (_BitScanReverse(&leading_zero, value) != 0) { - return 31 - leading_zero; - } - - return 32; -} - -[[nodiscard]] inline u32 CountLeadingZeroes64(u64 value) { - unsigned long leading_zero = 0; - - if (_BitScanReverse64(&leading_zero, value) != 0) { - return 63 - leading_zero; - } - - return 64; -} -#else -[[nodiscard]] inline u32 CountLeadingZeroes32(u32 value) { - if (value == 0) { - return 32; - } - - return static_cast(__builtin_clz(value)); -} - -[[nodiscard]] inline u32 CountLeadingZeroes64(u64 value) { - if (value == 0) { - return 64; - } - - return static_cast(__builtin_clzll(value)); -} -#endif - -#ifdef _MSC_VER -[[nodiscard]] inline u32 CountTrailingZeroes32(u32 value) { - unsigned long trailing_zero = 0; - - if (_BitScanForward(&trailing_zero, value) != 0) { - return trailing_zero; - } - - return 32; -} - -[[nodiscard]] inline u32 CountTrailingZeroes64(u64 value) { - unsigned long trailing_zero = 0; - - if (_BitScanForward64(&trailing_zero, value) != 0) { - return trailing_zero; - } - - return 64; -} -#else -[[nodiscard]] inline u32 CountTrailingZeroes32(u32 value) { - if (value == 0) { - return 32; - } - - return static_cast(__builtin_ctz(value)); -} - -[[nodiscard]] inline u32 CountTrailingZeroes64(u64 value) { - if (value == 0) { - return 64; - } - - return static_cast(__builtin_ctzll(value)); -} -#endif - #ifdef _MSC_VER [[nodiscard]] inline u32 MostSignificantBit32(const u32 value) { diff --git a/src/core/hle/kernel/k_priority_queue.h b/src/core/hle/kernel/k_priority_queue.h index 99fb8fe93..0dc929040 100644 --- a/src/core/hle/kernel/k_priority_queue.h +++ b/src/core/hle/kernel/k_priority_queue.h @@ -8,11 +8,11 @@ #pragma once #include +#include #include #include "common/assert.h" #include "common/bit_set.h" -#include "common/bit_util.h" #include "common/common_types.h" #include "common/concepts.h" @@ -268,7 +268,7 @@ private: } constexpr s32 GetNextCore(u64& affinity) { - const s32 core = Common::CountTrailingZeroes64(affinity); + const s32 core = std::countr_zero(affinity); ClearAffinityBit(affinity, core); return core; } diff --git a/src/core/hle/kernel/k_scheduler.cpp b/src/core/hle/kernel/k_scheduler.cpp index 42f0ea483..12b5619fb 100644 --- a/src/core/hle/kernel/k_scheduler.cpp +++ b/src/core/hle/kernel/k_scheduler.cpp @@ -5,6 +5,8 @@ // This file references various implementation details from Atmosphere, an open-source firmware for // the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX. +#include + #include "common/assert.h" #include "common/bit_util.h" #include "common/fiber.h" @@ -31,12 +33,12 @@ static void IncrementScheduledCount(Kernel::Thread* thread) { void KScheduler::RescheduleCores(KernelCore& kernel, u64 cores_pending_reschedule, Core::EmuThreadHandle global_thread) { - u32 current_core = global_thread.host_handle; + const u32 current_core = global_thread.host_handle; bool must_context_switch = global_thread.guest_handle != InvalidHandle && (current_core < Core::Hardware::NUM_CPU_CORES); while (cores_pending_reschedule != 0) { - u32 core = Common::CountTrailingZeroes64(cores_pending_reschedule); + const auto core = static_cast(std::countr_zero(cores_pending_reschedule)); ASSERT(core < Core::Hardware::NUM_CPU_CORES); if (!must_context_switch || core != current_core) { auto& phys_core = kernel.PhysicalCore(core); @@ -109,7 +111,7 @@ u64 KScheduler::UpdateHighestPriorityThreadsImpl(KernelCore& kernel) { // Idle cores are bad. We're going to try to migrate threads to each idle core in turn. while (idle_cores != 0) { - u32 core_id = Common::CountTrailingZeroes64(idle_cores); + const auto core_id = static_cast(std::countr_zero(idle_cores)); if (Thread* suggested = priority_queue.GetSuggestedFront(core_id); suggested != nullptr) { s32 migration_candidates[Core::Hardware::NUM_CPU_CORES]; size_t num_candidates = 0; diff --git a/src/core/hle/kernel/memory/page_heap.h b/src/core/hle/kernel/memory/page_heap.h index 22b0de860..131093284 100644 --- a/src/core/hle/kernel/memory/page_heap.h +++ b/src/core/hle/kernel/memory/page_heap.h @@ -8,11 +8,11 @@ #pragma once #include +#include #include #include "common/alignment.h" #include "common/assert.h" -#include "common/bit_util.h" #include "common/common_funcs.h" #include "common/common_types.h" #include "core/hle/kernel/memory/memory_types.h" @@ -105,7 +105,7 @@ private: ASSERT(depth == 0); return -1; } - offset = offset * 64 + Common::CountTrailingZeroes64(v); + offset = offset * 64 + static_cast(std::countr_zero(v)); ++depth; } while (depth < static_cast(used_depths)); diff --git a/src/core/hle/kernel/process_capability.cpp b/src/core/hle/kernel/process_capability.cpp index 0f128c586..0566311b6 100644 --- a/src/core/hle/kernel/process_capability.cpp +++ b/src/core/hle/kernel/process_capability.cpp @@ -2,6 +2,8 @@ // Licensed under GPLv2 or any later version // Refer to the license.txt file included. +#include + #include "common/bit_util.h" #include "common/logging/log.h" #include "core/hle/kernel/errors.h" @@ -60,7 +62,7 @@ constexpr CapabilityType GetCapabilityType(u32 value) { u32 GetFlagBitOffset(CapabilityType type) { const auto value = static_cast(type); - return static_cast(Common::BitSize() - Common::CountLeadingZeroes32(value)); + return static_cast(Common::BitSize() - static_cast(std::countl_zero(value))); } } // Anonymous namespace diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt index 8a606b448..33fa89583 100644 --- a/src/tests/CMakeLists.txt +++ b/src/tests/CMakeLists.txt @@ -1,6 +1,5 @@ add_executable(tests common/bit_field.cpp - common/bit_utils.cpp common/fibers.cpp common/param_package.cpp common/ring_buffer.cpp diff --git a/src/tests/common/bit_utils.cpp b/src/tests/common/bit_utils.cpp deleted file mode 100644 index 479b5995a..000000000 --- a/src/tests/common/bit_utils.cpp +++ /dev/null @@ -1,23 +0,0 @@ -// Copyright 2017 Citra Emulator Project -// Licensed under GPLv2 or any later version -// Refer to the license.txt file included. - -#include -#include -#include "common/bit_util.h" - -namespace Common { - -TEST_CASE("BitUtils::CountTrailingZeroes", "[common]") { - REQUIRE(Common::CountTrailingZeroes32(0) == 32); - REQUIRE(Common::CountTrailingZeroes64(0) == 64); - REQUIRE(Common::CountTrailingZeroes32(9) == 0); - REQUIRE(Common::CountTrailingZeroes32(8) == 3); - REQUIRE(Common::CountTrailingZeroes32(0x801000) == 12); - REQUIRE(Common::CountTrailingZeroes64(9) == 0); - REQUIRE(Common::CountTrailingZeroes64(8) == 3); - REQUIRE(Common::CountTrailingZeroes64(0x801000) == 12); - REQUIRE(Common::CountTrailingZeroes64(0x801000000000UL) == 36); -} - -} // namespace Common diff --git a/src/video_core/cdma_pusher.cpp b/src/video_core/cdma_pusher.cpp index 94679d5d1..33b3c060b 100644 --- a/src/video_core/cdma_pusher.cpp +++ b/src/video_core/cdma_pusher.cpp @@ -18,10 +18,10 @@ // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. // +#include #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(std::countr_zero(mask)); mask &= ~(1U << lbs); ExecuteCommand(static_cast(offset + lbs), value); continue; diff --git a/src/video_core/cdma_pusher.h b/src/video_core/cdma_pusher.h index 8ca70b6dd..e5f212c1a 100644 --- a/src/video_core/cdma_pusher.h +++ b/src/video_core/cdma_pusher.h @@ -126,7 +126,7 @@ private: s32 count{}; s32 offset{}; - s32 mask{}; + u32 mask{}; bool incrementing{}; // Queue of command lists to be processed diff --git a/src/video_core/command_classes/codecs/h264.cpp b/src/video_core/command_classes/codecs/h264.cpp index 65bbeac78..fea6aed98 100644 --- a/src/video_core/command_classes/codecs/h264.cpp +++ b/src/video_core/command_classes/codecs/h264.cpp @@ -19,7 +19,7 @@ // #include -#include "common/bit_util.h" +#include #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(value + 1)); + const s32 size = 32 - std::countl_zero(value + 1); WriteBits(1, size); value -= (1U << (size - 1)) - 1; -- cgit v1.2.3