Initial upload v3.4.7

algo/skein/skein2.c

@@ -0,0 +1,81 @@
+#include "miner.h"
+#include "algo-gate-api.h"
+#include <string.h>
+#include <stdint.h>
+
+#include "sph_skein.h"
+
+// ctx caching seems slower with this algo
+//typedef struct {
+//        sph_skein512_context skein;
+//} skein2_ctx_holder;
+
+//skein2_ctx_holder skein2_ctx;
+
+//void init_skein2_ctx()
+//{
+//        sph_skein512_init(&skein2_ctx.skein);
+//}
+
+void skein2hash(void *output, const void *input)
+{
+	sph_skein512_context ctx_skein;
+
+	uint32_t hash[16];
+
+	sph_skein512_init(&ctx_skein);
+	sph_skein512(&ctx_skein, input, 80);
+	sph_skein512_close(&ctx_skein, hash);
+
+	sph_skein512_init(&ctx_skein);
+	sph_skein512(&ctx_skein, hash, 64);
+	sph_skein512_close(&ctx_skein, hash);
+
+	memcpy(output, hash, 32);
+
+}
+
+int scanhash_skein2(int thr_id, struct work *work,
+	uint32_t max_nonce, uint64_t *hashes_done)
+{
+        uint32_t *pdata = work->data;
+        uint32_t *ptarget = work->target;
+	uint32_t _ALIGN(64) hash64[8];
+	uint32_t _ALIGN(64) endiandata[20];
+	const uint32_t Htarg = ptarget[7];
+	const uint32_t first_nonce = pdata[19];
+	uint32_t n = first_nonce;
+
+        swab32_array( endiandata, pdata, 20 );
+
+	do {
+		be32enc(&endiandata[19], n);
+		skein2hash(hash64, endiandata);
+		if (hash64[7] < Htarg && fulltest(hash64, ptarget)) {
+			*hashes_done = n - first_nonce + 1;
+			pdata[19] = n;
+			return true;
+		}
+		n++;
+
+	} while (n < max_nonce && !work_restart[thr_id].restart);
+
+	*hashes_done = n - first_nonce + 1;
+	pdata[19] = n;
+
+	return 0;
+}
+
+int64_t skein2_get_max64 ()
+{
+  return 0x7ffffLL;
+}
+
+bool register_skein2_algo( algo_gate_t* gate )
+{
+  gate->scanhash  = (void*)&scanhash_skein2;
+  gate->hash      = (void*)&skein2hash;
+  gate->get_max64 = (void*)&skein2_get_max64;
+  return true;
+};
+