v3.7.9

algo/x14/veltor.c

@@ -0,0 +1,103 @@
+#include "veltor-gate.h"
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "algo/skein/sph_skein.h"
+#include "algo/gost/sph_gost.h"
+#include "algo/shavite/sph_shavite.h"
+#include "algo/shabal/sph_shabal.h"
+
+typedef struct {
+     sph_gost512_context     gost;
+     sph_shavite512_context  shavite;
+     sph_skein512_context    skein;
+     sph_shabal512_context   shabal;
+} veltor_ctx_holder;
+
+veltor_ctx_holder veltor_ctx __attribute__ ((aligned (64)));
+static __thread sph_skein512_context veltor_skein_mid
+                               __attribute__ ((aligned (64)));
+
+void init_veltor_ctx()
+{
+     sph_gost512_init( &veltor_ctx.gost );
+     sph_shavite512_init( &veltor_ctx.shavite );
+     sph_skein512_init( &veltor_ctx.skein);
+     sph_shabal512_init( &veltor_ctx.shabal);
+}
+
+void veltor_skein512_midstate( const void* input )
+{
+    memcpy( &veltor_skein_mid, &veltor_ctx.skein, sizeof veltor_skein_mid );
+    sph_skein512( &veltor_skein_mid, input, 64 );
+}
+
+void veltor_hash(void *output, const void *input)
+{
+	uint32_t _ALIGN(64) hashA[16], hashB[16];
+
+        veltor_ctx_holder ctx __attribute__ ((aligned (64)));
+        memcpy( &ctx, &veltor_ctx, sizeof(veltor_ctx) );
+
+        const int midlen = 64;            // bytes
+        const int tail   = 80 - midlen;   // 16
+
+        memcpy( &ctx.skein, &veltor_skein_mid, sizeof veltor_skein_mid );
+        sph_skein512( &ctx.skein, input + midlen, tail );
+
+	sph_skein512_close(&ctx.skein, hashA);
+
+        sph_shavite512(&ctx.shavite, hashA, 64);
+        sph_shavite512_close(&ctx.shavite, hashB);
+
+        sph_shabal512(&ctx.shabal, hashB, 64);
+        sph_shabal512_close(&ctx.shabal, hashA);
+
+	sph_gost512(&ctx.gost, hashA, 64);
+	sph_gost512_close(&ctx.gost, hashB);
+
+	memcpy(output, hashB, 32);
+}
+
+int scanhash_veltor(int thr_id, struct work *work, uint32_t max_nonce, uint64_t *hashes_done)
+{
+	uint32_t _ALIGN(128) hash[8];
+	uint32_t _ALIGN(128) endiandata[20];
+	uint32_t *pdata = work->data;
+	uint32_t *ptarget = work->target;
+
+	const uint32_t Htarg = ptarget[7];
+	const uint32_t first_nonce = pdata[19];
+	uint32_t nonce = first_nonce;
+	volatile uint8_t *restart = &(work_restart[thr_id].restart);
+
+	if (opt_benchmark)
+		ptarget[7] = 0x0cff;
+
+	// we need bigendian data...
+	for (int i=0; i < 19; i++) {
+		be32enc(&endiandata[i], pdata[i]);
+	}
+
+        veltor_skein512_midstate( endiandata );
+
+	do {
+		be32enc(&endiandata[19], nonce);
+		veltor_hash(hash, endiandata);
+
+		if (hash[7] <= Htarg && fulltest(hash, ptarget)) {
+			work_set_target_ratio(work, hash);
+			pdata[19] = nonce;
+			*hashes_done = pdata[19] - first_nonce;
+			return 1;
+		}
+		nonce++;
+
+	} while (nonce < max_nonce && !(*restart));
+
+	pdata[19] = nonce;
+	*hashes_done = pdata[19] - first_nonce + 1;
+	return 0;
+}