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feat: demo of AllCases fast search

master
Dnomd343 2 years ago
parent
b5a6ab04ec
commit
ce74bdbaa9
3 changed files with 188 additions and 8 deletions
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  1. 185
      src/all_cases/all_cases.cc
  2. 3
      src/all_cases/all_cases.h
  3. 8
      src/main.cc

185
src/all_cases/all_cases.cc
View File

@ -35,17 +35,194 @@ void AllCases::build() { // ensure that all cases available
}
}
//int32_t AllCases::check_case(uint32_t head, uint32_t range) { // whether the head and range is valid
//
// uint32_t mask = 0b110011 << head; // fill 2x2 block
//
// for (int addr = 0; range; range >>= 2) { // traverse every 2-bits
//
// while (mask >> addr & 0b1) {
// ++addr; // search next not filled block
// }
//
// switch (range & 0b11) {
// case 0b00: // space block
// case 0b11: // 1x1 block
// mask |= 0b1 << addr; // fill 1x1 block
// break;
// case 0b10: // 2x1 block
// if (addr > 15 || mask >> (addr + 4) & 0b1) { // invalid address
// return false;
// }
// mask |= 0b10001 << addr; // fill 2x1 block
// break;
// case 0b01: // 1x2 block
// if ((addr & 0b11) == 0b11 || mask >> (addr + 1) & 0b1) { // invalid address
// return false;
// }
// mask |= 0b11 << addr; // fill 1x2 block
// break;
// }
// }
//
// return true; // valid case
//
//}
uint32_t AllCases::check_case(uint32_t head, uint32_t range) { // whether the head and range is valid
uint32_t num = 1;
uint32_t mask = 0b110011 << head; // fill 2x2 block
for (int addr = 0; range; range >>= 2, ++num) { // traverse every 2-bits
while (mask >> addr & 0b1) {
++addr; // search next not filled block
}
switch (range & 0b11) {
case 0b00: // space block
case 0b11: // 1x1 block
mask |= 0b1 << addr; // fill 1x1 block
break;
case 0b10: // 2x1 block
if (addr > 15 || mask >> (addr + 4) & 0b1) { // invalid address
return num;
}
mask |= 0b10001 << addr; // fill 2x1 block
break;
case 0b01: // 1x2 block
if ((addr & 0b11) == 0b11 || mask >> (addr + 1) & 0b1) { // invalid address
return num;
}
mask |= 0b11 << addr; // fill 1x2 block
break;
}
}
return 0; // valid case
}
#include <iostream>
void AllCases::build_data() { // find all cases
for (uint32_t head = 0; head < 16; ++head) { // address of 2x2 block
// auto range = Common::range_reverse(0xA5740000);
// A 5 7 4
// 10 10 01 01 01 11 01 00
// !!
// search start at
// 10 10 01 01 01 11 10 ...
// auto offset = check_case(0, range);
//
// auto delta = (uint32_t)1 << (32 - check_case(0, range) * 2);
//
// auto next_at_least = Common::range_reverse(range) + delta;
//
// printf("next at least -> %08X\n", next_at_least);
/// 4258152: 0xA573F000
/// 4258153: 0xA5740000
/// 4258154: 0xA5743000
/// 4258155: 0xA574C000
/// 4258156: 0xA5770000
/// 4258157: 0xA5780000
/// 4258158: 0xA5783000
/// 4258159: 0xA578C000
// auto br = BasicRanges::fetch();
//
// uint32_t ret;
// for (auto i = 4258152; i <= 4258159; ++i) {
// printf("check: %08X (%d) -> ", Common::range_reverse(br->at(i)), i);
//
// if ((ret = check_case(0, br->at(i))) == 0) {
// std::cout << "ok" << std::endl;
// } else {
// std::cout << "error" << std::endl;
//
//// std::cout << "ret = " << ret << std::endl;
//
// auto delta = (uint32_t)1 << (32 - ret * 2);
// auto mask = 0xFFFFFFFF << (32 - ret * 2);
// auto next_at_least = (Common::range_reverse(br->at(i)) & mask) + delta;
//
// for (;;) {
// ++i;
// if (Common::range_reverse(br->at(i)) >= next_at_least) {
// break;
// }
// std::cout << "skip -> next" << std::endl;
// }
//
//
// printf("next at least: %08X\n", next_at_least);
//
// }
// }
/// A 5 7 7 0 0 00
/// 1010 0101 0111 0111 0000 0000 ...
// return;
// for (uint32_t head = 0; head < 16; ++head) { // address of 2x2 block
for (uint32_t head = 0; head < 1; ++head) { // address of 2x2 block
if ((head & 0b11) == 0b11) {
continue; // invalid 2x2 address
}
/// head -> 0/1/2 / 4/5/6 / 8/9/10 / 12/13/14
data[head].reserve(ALL_CASES_SIZE[head]); // memory pre-allocated
for (auto const &range : *BasicRanges::fetch()) { // check base on 2x2 address and range
if (Common::check_case(head, range)) {
data[head].emplace_back(Common::range_reverse(range)); // found valid case
// for (const auto &range : *BasicRanges::fetch()) { // check base on 2x2 address and range
// printf("%08X -> ", Common::range_reverse(range));
// if (check_case(head, range)) {
// printf("ok\n");
// data[head].emplace_back(Common::range_reverse(range)); // found valid case
// } else {
// printf("error\n");
// }
// }
uint32_t ret;
auto br = BasicRanges::fetch();
for (auto i = 0; i < br->size(); ++i) {
printf("%d: %08X -> ", i, Common::range_reverse(br->at(i)));
if ((ret = check_case(0, br->at(i))) == 0) {
printf("ok\n");
} else {
printf("error\n");
auto delta = (uint32_t)1 << (32 - ret * 2);
auto mask = 0xFFFFFFFF << (32 - ret * 2);
auto next_at_least = (Common::range_reverse(br->at(i)) & mask) + delta;
printf("next at least: %08X\n", next_at_least);
for (;;) {
++i;
if (Common::range_reverse(br->at(i)) >= next_at_least) {
break;
}
std::cout << "skip -> next" << std::endl;
}
}
}
}
}

3
src/all_cases/all_cases.h
View File

@ -24,4 +24,7 @@ private:
static std::vector<uint32_t> data[16];
static void build_data();
static uint32_t check_case(uint32_t head, uint32_t range);
};

8
src/main.cc
View File

@ -241,14 +241,14 @@ int main() {
// }
// load_ranges();
BasicRanges::build();
std::cout << "size: " << BasicRanges::fetch()->size() << std::endl;
// BasicRanges::build();
// std::cout << "size: " << BasicRanges::fetch()->size() << std::endl;
// for (const auto &range : *BasicRanges::fetch()) {
// printf("%08X\n", range);
// }
AllCases::build();
std::cerr << (clock() - start_time) * 1000 / CLOCKS_PER_SEC << "ms" << std::endl;
// std::cerr << (clock() - start_time) * 1000000 / CLOCKS_PER_SEC << "us" << std::endl;
// std::cout << "complete benchmark" << std::endl;

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