1 files changed, 74 insertions, 0 deletions
diff --git a/xmrstak/backend/cpu/minethd.hpp b/xmrstak/backend/cpu/minethd.hpp
new file mode 100644
index 0000000..40383cf
--- /dev/null
+++ b/xmrstak/backend/cpu/minethd.hpp
@@ -0,0 +1,74 @@
+#pragma once
+#include <thread>
+#include <vector>
+#include <atomic>
+#include <mutex>
+#include "../../crypto/cryptonight.h"
+#include "../miner_work.h"
+#include "../IBackend.hpp"
+#include "../GlobalStates.hpp"
+#include <iostream>
+
+namespace xmrstak
+{
+namespace cpu
+{
+
+class minethd : public IBackend
+{
+public:
+	static std::vector<IBackend*> thread_starter(uint32_t threadOffset, miner_work& pWork);
+	static bool self_test();
+
+	typedef void (*cn_hash_fun)(const void*, size_t, void*, cryptonight_ctx*);
+
+	static cn_hash_fun func_selector(bool bHaveAes, bool bNoPrefetch);
+	static void thd_setaffinity(std::thread::native_handle_type h, uint64_t cpu_id);
+
+	static cryptonight_ctx* minethd_alloc_ctx();
+
+private:
+
+	typedef void (*cn_hash_fun_dbl)(const void*, size_t, void*, cryptonight_ctx* __restrict, cryptonight_ctx* __restrict);
+	static cn_hash_fun_dbl func_dbl_selector(bool bHaveAes, bool bNoPrefetch);
+
+	minethd(miner_work& pWork, size_t iNo, bool double_work, bool no_prefetch, int64_t affinity);
+
+	// We use the top 10 bits of the nonce for thread and resume
+	// This allows us to resume up to 128 threads 4 times before
+	// we get nonce collisions
+	// Bottom 22 bits allow for an hour of work at 1000 H/s
+	inline uint32_t calc_start_nonce(uint32_t resume)
+	{
+		return reverseBits<uint32_t>(static_cast<uint32_t>(iThreadNo + GlobalStates::inst().iThreadCount * resume));
+	}
+
+	// Limited version of the nonce calc above
+	inline uint32_t calc_nicehash_nonce(uint32_t start, uint32_t resume)
+	{ 
+		return start | ( ( reverseBits<uint32_t>(static_cast<uint32_t>(iThreadNo + GlobalStates::inst().iThreadCount * resume)) >> 4u ) );
+	}
+
+	void work_main();
+	void double_work_main();
+	void consume_work();
+
+	uint64_t iJobNo;
+
+	static miner_work oGlobalWork;
+	miner_work oWork;
+
+	void pin_thd_affinity();
+	// Held by the creating context to prevent a race cond with oWorkThd = std::thread(...)
+	std::mutex work_thd_mtx;
+
+	std::thread oWorkThd;
+	uint8_t iThreadNo;
+	int64_t affinity;
+
+	bool bQuit;
+	bool bNoPrefetch;
+};
+
+} // namespace cpu
+} // namepsace xmrstak