perf: `type_id` conversion algorithm

src/core/benchmark/group.cc

@@ -94,7 +94,7 @@ static void RawCodeToTypeId(benchmark::State &state) {
 
 }
 
-// BENCHMARK(CommonCodeToTypeId)->Arg(8)->Arg(64)->Arg(256);
+BENCHMARK(CommonCodeToTypeId)->Arg(8)->Arg(64)->Arg(256);
 BENCHMARK(RawCodeToTypeId)->Arg(8)->Arg(64)->Arg(256);
 
 BENCHMARK_MAIN();

src/core/group/internal/group.cc

@@ -1,97 +1,20 @@
 #include "group/group.h"
 
-#include <utils/common.h>
-
-/// 1. n_1x1 + (n_1x2 + n_2x1) * 2 <= 14
-/// 2. (n_1x1 != 0) && (n_2x1 != 7)
-struct block_num_t {
-    uint8_t n_1x1 = 0; /// [0, 14]
-    uint8_t n_1x2 = 0; /// [0, 7]
-    uint8_t n_2x1 = 0; /// [0, 7]
-};
-/// n_space = 16 - n_1x1 - (n_1x2 + n_2x1) * 2
-
-using klotski::range_reverse;
-
-uint32_t my_type_id(uint32_t n_1x2, uint32_t n_2x1, uint32_t n_1x1) noexcept { // block_num_t -> type_id
-
-    // n = 0 | n_21 ~ 1 | n_11 ~ 15 | => 15
-    // n = 1 | n_21 ~ 2 | n_11 ~ 13 | => 26
-    // n = 2 | n_21 ~ 3 | n_11 ~ 11 | => 33
-    // n = 3 | n_21 ~ 4 | n_11 ~ 9  | => 36
-    // n = 4 | n_21 ~ 5 | n_11 ~ 7  | => 35
-    // n = 5 | n_21 ~ 6 | n_11 ~ 5  | => 30
-    // n = 6 | n_21 ~ 7 | n_11 ~ 3  | => 21
-    // n = 7 | n_21 ~ 8 | n_11 ~ 1  | => 8
-
-    // input -> n / n_2x1 / n_1x1
-
-    constexpr uint32_t offset[8] = {0, 15, 41, 74, 110, 145, 175, 196};
-
-    uint32_t n = n_1x2 + n_2x1;
-
-    return offset[n] + (15 - n*2) * n_2x1 + n_1x1;
-
-}
-
-uint32_t type_id_pro(int n, int n_2x1, int n_1x1) {
-
-    constexpr uint32_t offset[8] = {0, 15, 41, 74, 110, 145, 175, 196};
-
-    return offset[n] + (15 - n*2) * n_2x1 + n_1x1;
-
+static KLSK_INLINE uint32_t type_id(const int n, const int n_2x1, const int n_1x1) {
+    constexpr int offset[8] = {0, 15, 41, 74, 110, 145, 175, 196};
+    return offset[n] + (15 - n * 2) * n_2x1 + n_1x1;
 }
 
-uint32_t common_code_pro(uint64_t common_code) {
+uint32_t klotski::cases::common_code_to_type_id(const uint64_t common_code) {
     const auto range = static_cast<uint32_t>(common_code);
     const auto n_1x1 = std::popcount((range >> 1) & range & 0x55555555);
     const auto n_2x1 = std::popcount((range >> 1) & ~range & 0x55555555);
-    return type_id_pro(std::popcount(range) - n_1x1 * 2, n_2x1, n_1x1);
-}
-
-uint32_t raw_code_pro(uint64_t raw_code) {
-    // 1x1 -> 011
-    // 1x2 -> 001
-    // 2x1 -> 010
-
-    ///    0    2    4    9    2    4    9    2    4    9    2    4    9    2    4    9
-    /// 0000 0010 0100 1001 0010 0100 1001 0010 0100 1001 0010 0100 1001 0010 0100 1001
-    uint64_t k_1x1 = (~raw_code >> 2) & (raw_code >> 1) & raw_code & (uint64_t)0x0249249249249249;
-    // uint64_t k_1x2 = (~raw_code >> 2) & (~raw_code >> 1) & raw_code & (uint64_t)0x0249249249249249;
-    // uint64_t k_2x1 = (~raw_code >> 2) & (raw_code >> 1) & ~raw_code & (uint64_t)0x0249249249249249;
-
-    // 0010 0100 1001 -> 249
-    // uint64_t k_1x2 = (~raw_code >> 1) & raw_code & (uint64_t)0x0249249249249249;
-    uint64_t k_2x1 = (raw_code >> 1) & ~raw_code & (uint64_t)0x0249249249249249;
-
-    auto n_1x1 = std::popcount(k_1x1);
-    // auto n_1x2 = std::popcount(k_1x2);
-    auto n_2x1 = std::popcount(k_2x1);
-
-    uint64_t k_ = ((raw_code >> 1) ^ raw_code) & (uint64_t)0x0249249249249249;
-    auto n_ = std::popcount(k_);
-
-    // popcount = 10 + BLOCK_1x1 * 2 + (BLOCK_1x2 + BLOCK_2x1) * 4
-    // auto n_1x1 = (std::popcount(raw_code) - 10 - (n_1x2 + n_2x1) * 4) / 2;
-
-    uint64_t k_1x1_ = (raw_code >> 1) & raw_code & (uint64_t)0x0249249249249249;
-    auto n_1x1_ = std::popcount(k_1x1_) - n_ - 3;
-
-    // 0100 1001 0010 -> 492
-    uint64_t k_1x1__ = (~raw_code >> 1) & raw_code & (uint64_t)0x0492492492492492;
-    auto n_1x1__ = std::popcount(k_1x1__) - n_2x1;
-
-    // return my_type_id(n_1x2, n_2x1, n_1x1);
-    // return type_id_pro(n_2x1 + n_1x2, n_2x1, n_1x1);
-    return type_id_pro(n_, n_2x1, n_1x1_);
-}
-
-uint32_t klotski::cases::common_code_to_type_id(uint64_t common_code) {
-    // return cal_type_id(cal_common_block_num(common_code));
-    return common_code_pro(common_code);
+    return type_id(std::popcount(range) - n_1x1 * 2, n_2x1, n_1x1);
 }
 
-uint32_t klotski::cases::raw_code_to_type_id(uint64_t raw_code) {
-    // return cal_type_id(cal_raw_block_num(raw_code));
-    return raw_code_pro(raw_code);
+uint32_t klotski::cases::raw_code_to_type_id(const uint64_t raw_code) {
+    const auto n = std::popcount(((raw_code >> 1) ^ raw_code) & 0x0249249249249249);
+    const auto n_2x1 = std::popcount((raw_code >> 1) & ~raw_code & 0x0249249249249249);
+    const auto n_1x1 = std::popcount((raw_code >> 1) & raw_code & 0x0249249249249249) - n - 3;
+    return type_id(n, n_2x1, n_1x1);
 }