Refactor the CPU scanhash_* functions to use a common API. Fixes bugs.

- Before, some returned bool, and others returned int (which was then turned
  into a bool with a comparison); now, everything returns a bool
- Before, some set hashes_done to nonce - 1 when a share was found and others
  set it to nonce + 1 or 2. This caused some algorithms to scan/submit shares
  twice with the new cpu_scanhash function. Now, it has all been replaced with
  last_nonce, which is set to the final nonce checked by the scanhash_* func.
- VIA needs the full data, and cannot use midstate. All the others were
  expecting midstate and data+64 for their parameters. Now, we pass midstate
  and the full data pointer, and let the scanhash_* function choose which to
  use.

main.c

@@ -146,7 +146,6 @@ const char *algo_names[] = {
 #endif
 };
 
-typedef void (*sha256_func)();
 static const sha256_func sha256_funcs[] = {
 	[ALGO_C]		= (sha256_func)scanhash_c,
 #ifdef WANT_SSE2_4WAY
@@ -488,34 +487,20 @@ static double bench_algo_stage3(
 	struct timeval end;
 	struct timeval start;
 	uint32_t max_nonce = (1<<22);
-	unsigned long hashes_done = 0;
+	uint32_t last_nonce = 0;
 
 	gettimeofday(&start, 0);
-		#if defined(WANT_VIA_PADLOCK)
-
-			// For some reason, the VIA padlock hasher has a different API ...
-			if (ALGO_VIA==algo) {
-				(void)scanhash_via(
-					0,
-					work.data,
-					work.target,
-					max_nonce,
-					&hashes_done,
-					work.blk.nonce
-				);
-			} else
-		#endif
 			{
 				sha256_func func = sha256_funcs[algo];
 				(*func)(
 					0,
 					work.midstate,
-					work.data + 64,
+					work.data,
 					work.hash1,
 					work.hash,
 					work.target,
 					max_nonce,
-					&hashes_done,
+					&last_nonce,
 					work.blk.nonce
 				);
 			}
@@ -528,7 +513,7 @@ static double bench_algo_stage3(
 
 	double rate = -1.0;
 	if (0<usec_elapsed) {
-		rate = (1.0*hashes_done)/usec_elapsed;
+		rate = (1.0*(last_nonce+1))/usec_elapsed;
 	}
 	return rate;
 }
@@ -5465,102 +5450,28 @@ static uint64_t cpu_scanhash(struct thr_info *thr, struct work *work, uint64_t m
 {
 	const int thr_id = thr->id;
 
-	long unsigned int hashes_done = 0;
 	uint32_t first_nonce = work->blk.nonce;
-	bool rc = false;
+	uint32_t last_nonce;
+	bool rc;
+
+CPUSearch:
+	last_nonce = first_nonce;
+	rc = false;
 
 	/* scan nonces for a proof-of-work hash */
-	switch (opt_algo) {
-	case ALGO_C:
-		rc = scanhash_c(thr_id, work->midstate, work->data + 64,
-			        work->hash1, work->hash, work->target,
-				max_nonce, &hashes_done,
-				work->blk.nonce);
-		break;
-#ifdef WANT_X8632_SSE2
-	case ALGO_SSE2_32: {
-		unsigned int rc5 =
-		        scanhash_sse2_32(thr_id, work->midstate, work->data + 64,
-					 work->hash1, work->hash,
-					 work->target,
-				         max_nonce, &hashes_done,
-					 work->blk.nonce);
-		rc = (rc5 == -1) ? false : true;
-		}
-		break;
-#endif
-#ifdef WANT_X8664_SSE2
-	case ALGO_SSE2_64: {
-		unsigned int rc5 =
-		        scanhash_sse2_64(thr_id, work->midstate, work->data + 64,
-					 work->hash1, work->hash,
-					 work->target,
-				         max_nonce, &hashes_done,
-					 work->blk.nonce);
-		rc = (rc5 == -1) ? false : true;
-		}
-		break;
-#endif
-#ifdef WANT_X8664_SSE4
-	case ALGO_SSE4_64: {
-		unsigned int rc5 =
-		        scanhash_sse4_64(thr_id, work->midstate, work->data + 64,
-					 work->hash1, work->hash,
-					 work->target,
-				         max_nonce, &hashes_done,
-					 work->blk.nonce);
-		rc = (rc5 == -1) ? false : true;
-		}
-		break;
-#endif
-#ifdef WANT_SSE2_4WAY
-	case ALGO_4WAY: {
-		unsigned int rc4 =
-			ScanHash_4WaySSE2(thr_id, work->midstate, work->data + 64,
-					  work->hash1, work->hash,
-					  work->target,
-					  max_nonce, &hashes_done,
-					  work->blk.nonce);
-		rc = (rc4 == -1) ? false : true;
-		}
-		break;
-#endif
-#ifdef WANT_ALTIVEC_4WAY
-        case ALGO_ALTIVEC_4WAY:
 	{
-            unsigned int rc4 = ScanHash_altivec_4way(thr_id, work->midstate, work->data + 64,
-                    work->hash1, work->hash,
+		sha256_func func = sha256_funcs[opt_algo];
+		rc = (*func)(
+			thr_id,
+			work->midstate,
+			work->data,
+			work->hash1,
+			work->hash,
 			work->target,
-                    max_nonce, &hashes_done,
-                    work->blk.nonce);
-            rc = (rc4 == -1) ? false : true;
-        }
-        break;
-#endif
-#ifdef WANT_VIA_PADLOCK
-	case ALGO_VIA:
-		rc = scanhash_via(thr_id, work->data, work->target,
-				  max_nonce, &hashes_done,
-				  work->blk.nonce);
-		break;
-#endif
-	case ALGO_CRYPTOPP:
-		rc = scanhash_cryptopp(thr_id, work->midstate, work->data + 64,
-			        work->hash1, work->hash, work->target,
-				max_nonce, &hashes_done,
-				work->blk.nonce);
-		break;
-#ifdef WANT_CRYPTOPP_ASM32
-	case ALGO_CRYPTOPP_ASM32:
-		rc = scanhash_asm32(thr_id, work->midstate, work->data + 64,
-			        work->hash1, work->hash, work->target,
-				max_nonce, &hashes_done,
-				work->blk.nonce);
-		break;
-#endif
-	default:
-		/* should never happen */
-		applog(LOG_ERR, "Unrecognized hash algorithm! This should be impossible!");
+			max_nonce,
+			&last_nonce,
+			work->blk.nonce
+		);
 	}
 
 	/* if nonce found, submit work */
@@ -5570,10 +5481,15 @@ static uint64_t cpu_scanhash(struct thr_info *thr, struct work *work, uint64_t m
 		if (unlikely(!submit_work_sync(thr, work))) {
 			applog(LOG_ERR, "Failed to submit_work_sync in miner_thread %d", thr_id);
 		}
+		work->blk.nonce = last_nonce + 1;
+		goto CPUSearch;
 	}
+	else
+	if (unlikely(last_nonce == first_nonce))
+		return 0;
 
-	work->blk.nonce = hashes_done;
-	return (uint64_t)hashes_done - first_nonce;
+	work->blk.nonce = last_nonce + 1;
+	return last_nonce - first_nonce + 1;
 }
 
 struct device_api cpu_api = {

miner.h

@@ -381,57 +381,62 @@ extern json_t *json_rpc_call(CURL *curl, const char *url, const char *userpass,
 extern char *bin2hex(const unsigned char *p, size_t len);
 extern bool hex2bin(unsigned char *p, const char *hexstr, size_t len);
 
-extern unsigned int ScanHash_4WaySSE2(int, const unsigned char *pmidstate,
-	unsigned char *pdata, unsigned char *phash1, unsigned char *phash,
-	const unsigned char *ptarget,
-	uint32_t max_nonce, unsigned long *nHashesDone, uint32_t nonce);
-
-extern unsigned int ScanHash_altivec_4way(int thr_id, const unsigned char *pmidstate,
+typedef bool (*sha256_func)(int thr_id, const unsigned char *pmidstate,
 	unsigned char *pdata,
 	unsigned char *phash1, unsigned char *phash,
 	const unsigned char *ptarget,
-	uint32_t max_nonce, unsigned long *nHashesDone, uint32_t nonce);
+	uint32_t max_nonce,
+	uint32_t *last_nonce,
+	uint32_t nonce);
 
-extern unsigned int scanhash_sse2_amd64(int, const unsigned char *pmidstate,
+extern bool ScanHash_4WaySSE2(int, const unsigned char *pmidstate,
 	unsigned char *pdata, unsigned char *phash1, unsigned char *phash,
 	const unsigned char *ptarget,
-	uint32_t max_nonce, unsigned long *nHashesDone);
+	uint32_t max_nonce, uint32_t *last_nonce, uint32_t nonce);
+
+extern bool ScanHash_altivec_4way(int thr_id, const unsigned char *pmidstate,
+	unsigned char *pdata,
+	unsigned char *phash1, unsigned char *phash,
+	const unsigned char *ptarget,
+	uint32_t max_nonce, uint32_t *last_nonce, uint32_t nonce);
 
-extern bool scanhash_via(int, unsigned char *data_inout,
+extern bool scanhash_via(int, const unsigned char *pmidstate,
+	unsigned char *pdata,
+	unsigned char *phash1, unsigned char *phash,
 	const unsigned char *target,
-	uint32_t max_nonce, unsigned long *hashes_done, uint32_t n);
+	uint32_t max_nonce, uint32_t *last_nonce, uint32_t n);
 
 extern bool scanhash_c(int, const unsigned char *midstate, unsigned char *data,
 	      unsigned char *hash1, unsigned char *hash,
 	      const unsigned char *target,
-	      uint32_t max_nonce, unsigned long *hashes_done, uint32_t n);
+	      uint32_t max_nonce, uint32_t *last_nonce, uint32_t n);
 
 extern bool scanhash_cryptopp(int, const unsigned char *midstate,unsigned char *data,
 	      unsigned char *hash1, unsigned char *hash,
 	      const unsigned char *target,
-	      uint32_t max_nonce, unsigned long *hashes_done, uint32_t n);
+	      uint32_t max_nonce, uint32_t *last_nonce, uint32_t n);
 
 extern bool scanhash_asm32(int, const unsigned char *midstate,unsigned char *data,
 	      unsigned char *hash1, unsigned char *hash,
 	      const unsigned char *target,
-	      uint32_t max_nonce, unsigned long *hashes_done, uint32_t nonce);
+	      uint32_t max_nonce, uint32_t *last_nonce, uint32_t nonce);
 
-extern int scanhash_sse2_64(int, const unsigned char *pmidstate, unsigned char *pdata,
+extern bool scanhash_sse2_64(int, const unsigned char *pmidstate, unsigned char *pdata,
 	unsigned char *phash1, unsigned char *phash,
 	const unsigned char *ptarget,
-	uint32_t max_nonce, unsigned long *nHashesDone,
+	uint32_t max_nonce, uint32_t *last_nonce,
 	uint32_t nonce);
 
-extern int scanhash_sse4_64(int, const unsigned char *pmidstate, unsigned char *pdata,
+extern bool scanhash_sse4_64(int, const unsigned char *pmidstate, unsigned char *pdata,
 	unsigned char *phash1, unsigned char *phash,
 	const unsigned char *ptarget,
-	uint32_t max_nonce, unsigned long *nHashesDone,
+	uint32_t max_nonce, uint32_t *last_nonce,
 	uint32_t nonce);
 
-extern int scanhash_sse2_32(int, const unsigned char *pmidstate, unsigned char *pdata,
+extern bool scanhash_sse2_32(int, const unsigned char *pmidstate, unsigned char *pdata,
 	unsigned char *phash1, unsigned char *phash,
 	const unsigned char *ptarget,
-	uint32_t max_nonce, unsigned long *nHashesDone,
+	uint32_t max_nonce, uint32_t *last_nonce,
 	uint32_t nonce);
 
 extern int

sha256_4way.c

@@ -101,14 +101,16 @@ static const unsigned int pSHA256InitState[8] =
 {0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
 
 
-unsigned int ScanHash_4WaySSE2(int thr_id, const unsigned char *pmidstate,
+bool ScanHash_4WaySSE2(int thr_id, const unsigned char *pmidstate,
 	unsigned char *pdata,
 	unsigned char *phash1, unsigned char *phash,
 	const unsigned char *ptarget,
-	uint32_t max_nonce, unsigned long *nHashesDone,
+	uint32_t max_nonce, uint32_t *last_nonce,
 	uint32_t nonce)
 {
-    unsigned int *nNonce_p = (unsigned int*)(pdata + 12);
+    unsigned int *nNonce_p = (unsigned int*)(pdata + 76);
+
+	pdata += 64;
 
     work_restart[thr_id].restart = 0;
 
@@ -132,17 +134,18 @@ unsigned int ScanHash_4WaySSE2(int thr_id, const unsigned char *pmidstate,
                     ((unsigned int*)phash)[i] = thash[i][j];
 
 		if (fulltest(phash, ptarget)) {
-			*nHashesDone = nonce;
-			*nNonce_p = nonce + j;
-                	return nonce + j;
+					nonce += j;
+					*last_nonce = nonce;
+					*nNonce_p = nonce;
+					return true;
 		}
             }
         }
 
         if ((nonce >= max_nonce) || work_restart[thr_id].restart)
         {
-            *nHashesDone = nonce;
-            return -1;
+            *last_nonce = nonce;
+            return false;
         }
     }
 }

sha256_altivec_4way.c

@@ -74,14 +74,16 @@ static const unsigned int pSHA256InitState[8] =
 {0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
 
 
-unsigned int ScanHash_altivec_4way(int thr_id, const unsigned char *pmidstate,
+bool ScanHash_altivec_4way(int thr_id, const unsigned char *pmidstate,
 	unsigned char *pdata,
 	unsigned char *phash1, unsigned char *phash,
 	const unsigned char *ptarget,
-	uint32_t max_nonce, unsigned long *nHashesDone,
+	uint32_t max_nonce, uint32_t *last_nonce,
 	uint32_t nonce)
 {
-    unsigned int *nNonce_p = (unsigned int*)(pdata + 12);
+    unsigned int *nNonce_p = (unsigned int*)(pdata + 76);
+
+	pdata += 64;
 
     work_restart[thr_id].restart = 0;
 
@@ -104,17 +106,18 @@ unsigned int ScanHash_altivec_4way(int thr_id, const unsigned char *pmidstate,
                     ((unsigned int*)phash)[i] = thash[i][j];
 
 		if (fulltest(phash, ptarget)) {
-			*nHashesDone = nonce;
-			*nNonce_p = nonce + j;
-                	return nonce + j;
+					nonce += j;
+					*last_nonce = nonce;
+					*nNonce_p = nonce;
+					return true;
 		}
             }
         }
 
         if ((nonce >= max_nonce) || work_restart[thr_id].restart)
         {
-            *nHashesDone = nonce;
-            return -1;
+            *last_nonce = nonce;
+            return false;
         }
 
         nonce += NPAR;

sha256_cryptopp.c

@@ -97,11 +97,13 @@ bool scanhash_cryptopp(int thr_id, const unsigned char *midstate,
 		unsigned char *data,
 	        unsigned char *hash1, unsigned char *hash,
 		const unsigned char *target,
-	        uint32_t max_nonce, unsigned long *hashes_done,
+	        uint32_t max_nonce, uint32_t *last_nonce,
 		uint32_t n)
 {
 	uint32_t *hash32 = (uint32_t *) hash;
-	uint32_t *nonce = (uint32_t *)(data + 12);
+	uint32_t *nonce = (uint32_t *)(data + 76);
+
+	data += 64;
 
 	work_restart[thr_id].restart = 0;
 
@@ -113,12 +115,12 @@ bool scanhash_cryptopp(int thr_id, const unsigned char *midstate,
 		runhash(hash, hash1, sha256_init_state);
 
 		if (unlikely((hash32[7] == 0) && fulltest(hash, target))) {
-			*hashes_done = n;
+			*last_nonce = n;
 			return true;
 		}
 
 		if ((n >= max_nonce) || work_restart[thr_id].restart) {
-			*hashes_done = n;
+			*last_nonce = n;
 			return false;
 		}
 	}
@@ -579,11 +581,13 @@ bool scanhash_asm32(int thr_id, const unsigned char *midstate,
 		unsigned char *data,
 	        unsigned char *hash1, unsigned char *hash,
 		const unsigned char *target,
-	        uint32_t max_nonce, unsigned long *hashes_done,
+	        uint32_t max_nonce, uint32_t *last_nonce,
 		uint32_t n)
 {
 	uint32_t *hash32 = (uint32_t *) hash;
-	uint32_t *nonce = (uint32_t *)(data + 12);
+	uint32_t *nonce = (uint32_t *)(data + 76);
+
+	data += 64;
 
 	work_restart[thr_id].restart = 0;
 
@@ -595,12 +599,12 @@ bool scanhash_asm32(int thr_id, const unsigned char *midstate,
 		runhash32(hash, hash1, sha256_init_state);
 
 		if (unlikely((hash32[7] == 0) && fulltest(hash, target))) {
-			*hashes_done = n;
+			*last_nonce = n;
 			return true;
 		}
 
 		if ((n >= max_nonce) || work_restart[thr_id].restart) {
-			*hashes_done = n;
+			*last_nonce = n;
 			return false;
 		}
 	}

sha256_generic.c

@@ -242,13 +242,15 @@ const uint32_t sha256_init_state[8] = {
 bool scanhash_c(int thr_id, const unsigned char *midstate, unsigned char *data,
 	        unsigned char *hash1, unsigned char *hash,
 		const unsigned char *target,
-	        uint32_t max_nonce, unsigned long *hashes_done,
+	        uint32_t max_nonce, uint32_t *last_nonce,
 		uint32_t n)
 {
 	uint32_t *hash32 = (uint32_t *) hash;
-	uint32_t *nonce = (uint32_t *)(data + 12);
+	uint32_t *nonce = (uint32_t *)(data + 76);
 	unsigned long stat_ctr = 0;
 
+	data += 64;
+
 	work_restart[thr_id].restart = 0;
 
 	while (1) {
@@ -261,12 +263,12 @@ bool scanhash_c(int thr_id, const unsigned char *midstate, unsigned char *data,
 		stat_ctr++;
 
 		if (unlikely((hash32[7] == 0) && fulltest(hash, target))) {
-			*hashes_done = n;
+			*last_nonce = n;
 			return true;
 		}
 
 		if ((n >= max_nonce) || work_restart[thr_id].restart) {
-			*hashes_done = n;
+			*last_nonce = n;
 			return false;
 		}
 	}

sha256_sse2_amd64.c

@@ -50,14 +50,14 @@ const uint32_t sha256_init[8]__attribute__((aligned(0x100))) =
 __m128i g_4sha256_k[64];
 __m128i sha256_consts_m128i[64]__attribute__((aligned(0x1000)));
 
-int scanhash_sse2_64(int thr_id, const unsigned char *pmidstate,
+bool scanhash_sse2_64(int thr_id, const unsigned char *pmidstate,
 	unsigned char *pdata,
 	unsigned char *phash1, unsigned char *phash,
 	const unsigned char *ptarget,
-	uint32_t max_nonce, unsigned long *nHashesDone,
+	uint32_t max_nonce, uint32_t *last_nonce,
 	uint32_t nonce)
 {
-    uint32_t *nNonce_p = (uint32_t *)(pdata + 12);
+    uint32_t *nNonce_p = (uint32_t *)(pdata + 76);
     uint32_t m_midstate[8], m_w[16], m_w1[16];
     __m128i m_4w[64] __attribute__ ((aligned (0x100)));
     __m128i m_4hash[64] __attribute__ ((aligned (0x100)));
@@ -65,6 +65,8 @@ int scanhash_sse2_64(int thr_id, const unsigned char *pmidstate,
     __m128i offset;
     int i;
 
+	pdata += 64;
+
     work_restart[thr_id].restart = 0;
 
     /* For debugging */
@@ -114,19 +116,20 @@ int scanhash_sse2_64(int thr_id, const unsigned char *pmidstate,
 		}
 
 		if (fulltest(phash, ptarget)) {
-		     *nHashesDone = nonce;
-		     *nNonce_p = nonce + j;
-		     return nonce + j;
+		     nonce += j;
+		     *last_nonce = nonce + 1;
+		     *nNonce_p = nonce;
+		     return true;
 		}
 	}
 
-	nonce += 4;
-
         if (unlikely((nonce >= max_nonce) || work_restart[thr_id].restart))
         {
-            *nHashesDone = nonce;
-            return -1;
+			*last_nonce = nonce;
+			return false;
 	}
+
+	nonce += 4;
    }
 }
 

sha256_sse2_i386.c

@@ -50,14 +50,14 @@ const uint32_t sha256_32init[8]__attribute__((aligned(0x100))) =
 __m128i g_4sha256_k[64];
 __m128i sha256_consts_m128i[64]__attribute__((aligned(0x1000)));
 
-int scanhash_sse2_32(int thr_id, const unsigned char *pmidstate,
+bool scanhash_sse2_32(int thr_id, const unsigned char *pmidstate,
 	unsigned char *pdata,
 	unsigned char *phash1, unsigned char *phash,
 	const unsigned char *ptarget,
-	uint32_t max_nonce, unsigned long *nHashesDone,
+	uint32_t max_nonce, uint32_t *last_nonce,
 	uint32_t nonce)
 {
-    uint32_t *nNonce_p = (uint32_t *)(pdata + 12);
+    uint32_t *nNonce_p = (uint32_t *)(pdata + 76);
     uint32_t m_midstate[8], m_w[16], m_w1[16];
     __m128i m_4w[64] __attribute__ ((aligned (0x100)));
     __m128i m_4hash[64] __attribute__ ((aligned (0x100)));
@@ -65,6 +65,8 @@ int scanhash_sse2_32(int thr_id, const unsigned char *pmidstate,
     __m128i offset;
     int i;
 
+	pdata += 64;
+
     work_restart[thr_id].restart = 0;
 
     /* For debugging */
@@ -116,19 +118,20 @@ int scanhash_sse2_32(int thr_id, const unsigned char *pmidstate,
 		}
 
 		if (fulltest(phash, ptarget)) {
-		     *nHashesDone = nonce;
-		     *nNonce_p = nonce + j;
-		     return nonce + j;
+		     nonce += j;
+		     *last_nonce = nonce;
+		     *nNonce_p = nonce;
+		     return true;
+		}
 	}
+
+	if (unlikely((nonce >= max_nonce) || work_restart[thr_id].restart)) {
+		*last_nonce = nonce;
+		return false;
 	}
 
 	nonce += 4;
 
-        if (unlikely((nonce >= max_nonce) || work_restart[thr_id].restart))
-        {
-            *nHashesDone = nonce;
-            return -1;
-	}
    }
 }
 

sha256_sse4_amd64.c

@@ -49,19 +49,21 @@ static uint32_t g_sha256_hinit[8] =
 
 __m128i g_4sha256_k[64];
 
-int scanhash_sse4_64(int thr_id, const unsigned char *pmidstate,
+bool scanhash_sse4_64(int thr_id, const unsigned char *pmidstate,
 	unsigned char *pdata,
 	unsigned char *phash1, unsigned char *phash,
 	const unsigned char *ptarget,
-	uint32_t max_nonce, unsigned long *nHashesDone,
+	uint32_t max_nonce, uint32_t *last_nonce,
 	uint32_t nonce)
 {
-    uint32_t *nNonce_p = (uint32_t *)(pdata + 12);
+    uint32_t *nNonce_p = (uint32_t *)(pdata + 76);
     uint32_t m_midstate[8], m_w[16], m_w1[16];
     __m128i m_4w[64], m_4hash[64], m_4hash1[64];
     __m128i offset;
     int i;
 
+	pdata += 64;
+
     work_restart[thr_id].restart = 0;
 
     /* For debugging */
@@ -113,19 +115,20 @@ int scanhash_sse4_64(int thr_id, const unsigned char *pmidstate,
 		}
 
 		if (fulltest(phash, ptarget)) {
-		     *nHashesDone = nonce;
-		     *nNonce_p = nonce + j;
-		     return nonce + j;
+			nonce += j;
+			*last_nonce = nonce;
+			*nNonce_p = nonce;
+			return true;
 		}
 	}
 
-	nonce += 4;
-
         if (unlikely((nonce >= max_nonce) || work_restart[thr_id].restart))
         {
-            *nHashesDone = nonce;
-            return -1;
+			*last_nonce = nonce;
+			return false;
 	}
+
+	nonce += 4;
    }
 }
 

sha256_via.c

@@ -19,9 +19,11 @@ static void via_sha256(void *hash, void *buf, unsigned len)
 		     :"memory");
 }
 
-bool scanhash_via(int thr_id, unsigned char *data_inout,
+bool scanhash_via(int thr_id, const unsigned char *pmidstate,
+	unsigned char *data_inout,
+	unsigned char *phash1, unsigned char *phash,
 	const unsigned char *target,
-		  uint32_t max_nonce, unsigned long *hashes_done,
+		  uint32_t max_nonce, uint32_t *last_nonce,
 		  uint32_t n)
 {
 	unsigned char data[128] __attribute__((aligned(128)));
@@ -70,12 +72,12 @@ bool scanhash_via(int thr_id, unsigned char *data_inout,
 				dout32[i] = swab32(data32[i]);
 			}
 
-			*hashes_done = n;
+			*last_nonce = n;
 			return true;
 		}
 
 		if ((n >= max_nonce) || work_restart[thr_id].restart) {
-			*hashes_done = n;
+			*last_nonce = n;
 			return false;
 		}
 	}