Merge branch 'publictests' of https://github.com/xcthulhu/go-ethereum into xcthulhu-publictests

.gitignore

@@ -6,6 +6,7 @@
 
 /tmp
 */**/*un~
+*/**/*.test
 *un~
 .DS_Store
 */**/.DS_Store

Godeps/Godeps.json

@@ -15,6 +15,11 @@
 			"Comment": "null-15",
 			"Rev": "12e4b4183793ac4b061921e7980845e750679fd0"
 		},
+		{
+			"ImportPath": "github.com/ethereum/ethash",
+			"Comment": "v17-23-g2561e13",
+			"Rev": "2561e1322a7e8e3d4a2cc903c44b1e96340bcb27"
+		},
 		{
 			"ImportPath": "github.com/ethereum/serpent-go",
 			"Rev": "5767a0dbd759d313df3f404dadb7f98d7ab51443"

Godeps/_workspace/src/github.com/ethereum/ethash/.gitignore

+.idea/
+.DS_Store
+*/**/*un~
+.vagrant/
+cpp-build/

Godeps/_workspace/src/github.com/ethereum/ethash/CMakeLists.txt

+cmake_minimum_required(VERSION 2.8.2)
+project(ethash)
+
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")
+set(ETHHASH_LIBS ethash)
+
+if (WIN32 AND WANT_CRYPTOPP)
+	add_subdirectory(cryptopp)
+endif()
+
+add_subdirectory(libethash)
+add_subdirectory(libethash-cl EXCLUDE_FROM_ALL)
+add_subdirectory(benchmark EXCLUDE_FROM_ALL)
+add_subdirectory(test EXCLUDE_FROM_ALL)

Godeps/_workspace/src/github.com/ethereum/ethash/benchmark/CMakeLists.txt

+include_directories(..)
+
+set(CMAKE_BUILD_TYPE Release)
+
+if (MSVC)
+	add_definitions("/openmp")
+endif()
+
+if (NOT MPI_FOUND)
+    find_package(MPI)
+endif()
+
+if (NOT CRYPTOPP_FOUND)
+	find_package(CryptoPP 5.6.2)
+endif()
+
+if (CRYPTOPP_FOUND)
+	add_definitions(-DWITH_CRYPTOPP)
+endif()
+
+if (NOT OpenCL_FOUND)
+	find_package(OpenCL)
+endif()
+if (OpenCL_FOUND)
+	add_definitions(-DWITH_OPENCL)
+	include_directories(${OpenCL_INCLUDE_DIRS})
+	list(APPEND FILES ethash_cl_miner.cpp ethash_cl_miner.h)
+endif()
+
+if (MPI_FOUND)
+    include_directories(${MPI_INCLUDE_PATH})
+    add_executable (Benchmark_MPI_FULL benchmark.cpp)
+    target_link_libraries (Benchmark_MPI_FULL ${ETHHASH_LIBS} ${MPI_LIBRARIES})
+    SET_TARGET_PROPERTIES(Benchmark_MPI_FULL PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS} ${MPI_COMPILE_FLAGS} -DFULL -DMPI")
+
+    add_executable (Benchmark_MPI_LIGHT benchmark.cpp)
+    target_link_libraries (Benchmark_MPI_LIGHT ${ETHHASH_LIBS} ${MPI_LIBRARIES})
+    SET_TARGET_PROPERTIES(Benchmark_MPI_LIGHT PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS} ${MPI_COMPILE_FLAGS} -DMPI")
+endif()
+
+add_executable (Benchmark_FULL benchmark.cpp)
+target_link_libraries (Benchmark_FULL ${ETHHASH_LIBS})
+SET_TARGET_PROPERTIES(Benchmark_FULL PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS} -DFULL")
+
+add_executable (Benchmark_LIGHT benchmark.cpp)
+target_link_libraries (Benchmark_LIGHT ${ETHHASH_LIBS})
+
+if (OpenCL_FOUND)
+	add_executable (Benchmark_CL benchmark.cpp)
+	target_link_libraries (Benchmark_CL ${ETHHASH_LIBS} ethash-cl)
+	SET_TARGET_PROPERTIES(Benchmark_CL PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS} -DOPENCL")
+endif()
+

Godeps/_workspace/src/github.com/ethereum/ethash/benchmark/benchmark.cpp

+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file benchmark.cpp
+ * @author Tim Hughes <tim@twistedfury.com>
+ * @date 2015
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <libethash/ethash.h>
+#include <libethash/util.h>
+#ifdef OPENCL
+#include <libethash-cl/ethash_cl_miner.h>
+#endif
+#include <vector>
+#include <algorithm>
+
+#ifdef WITH_CRYPTOPP
+#include <libethash/SHA3_cryptopp.h>
+#include <string>
+
+#else
+#include "libethash/sha3.h"
+#endif // WITH_CRYPTOPP
+
+#undef min
+#undef max
+
+#if defined(OPENCL)
+const unsigned trials = 1024*1024*32;
+#elif defined(FULL)
+const unsigned trials = 1024*1024/8;
+#else
+const unsigned trials = 1024*1024/1024;
+#endif
+uint8_t g_hashes[1024*32];
+
+static char nibbleToChar(unsigned nibble)
+{
+	return (char) ((nibble >= 10 ? 'a'-10 : '0') + nibble);
+}
+
+static uint8_t charToNibble(char chr)
+{
+	if (chr >= '0' && chr <= '9')
+	{
+		return (uint8_t) (chr - '0');
+	}
+	if (chr >= 'a' && chr <= 'z')
+	{
+		return (uint8_t) (chr - 'a' + 10);
+	}
+	if (chr >= 'A' && chr <= 'Z')
+	{
+		return (uint8_t) (chr - 'A' + 10);
+	}
+	return 0;
+}
+
+static std::vector<uint8_t> hexStringToBytes(char const* str)
+{
+	std::vector<uint8_t> bytes(strlen(str) >> 1);
+	for (unsigned i = 0; i != bytes.size(); ++i)
+	{
+		bytes[i] = charToNibble(str[i*2 | 0]) << 4;
+		bytes[i] |= charToNibble(str[i*2 | 1]);
+	}
+	return bytes;
+}
+
+static std::string bytesToHexString(uint8_t const* bytes, unsigned size)
+{
+	std::string str;
+	for (unsigned i = 0; i != size; ++i)
+	{
+		str += nibbleToChar(bytes[i] >> 4);
+		str += nibbleToChar(bytes[i] & 0xf);
+	}
+	return str;
+}
+
+extern "C" int main(void)
+{
+	// params for ethash
+	ethash_params params;
+	ethash_params_init(&params, 0);
+	//params.full_size = 262147 * 4096;	// 1GBish;
+	//params.full_size = 32771 * 4096;	// 128MBish;
+	//params.full_size = 8209 * 4096;	// 8MBish;
+	//params.cache_size = 8209*4096;
+	//params.cache_size = 2053*4096;
+	uint8_t seed[32], previous_hash[32];
+
+	memcpy(seed, hexStringToBytes("9410b944535a83d9adf6bbdcc80e051f30676173c16ca0d32d6f1263fc246466").data(), 32);
+	memcpy(previous_hash, hexStringToBytes("c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470").data(), 32);
+	
+	// allocate page aligned buffer for dataset
+#ifdef FULL
+	void* full_mem_buf = malloc(params.full_size + 4095);
+	void* full_mem = (void*)((uintptr_t(full_mem_buf) + 4095) & ~4095);
+#endif
+	void* cache_mem_buf = malloc(params.cache_size + 63);
+	void* cache_mem = (void*)((uintptr_t(cache_mem_buf) + 63) & ~63);
+
+	ethash_cache cache;
+	cache.mem = cache_mem;
+	
+	// compute cache or full data
+	{
+		clock_t startTime = clock();
+		ethash_mkcache(&cache, &params, seed);
+		clock_t time = clock() - startTime;
+
+		uint8_t cache_hash[32];
+		SHA3_256(cache_hash, (uint8_t const*)cache_mem, params.cache_size);
+		debugf("ethash_mkcache: %ums, sha3: %s\n", (unsigned)((time*1000)/CLOCKS_PER_SEC), bytesToHexString(cache_hash,sizeof(cache_hash)).data());
+
+		// print a couple of test hashes
+		{
+			const clock_t startTime = clock();
+			ethash_return_value hash;
+			ethash_light(&hash, &cache, &params, previous_hash, 0);
+			const clock_t time = clock() - startTime;
+			debugf("ethash_light test: %ums, %s\n", (unsigned)((time*1000)/CLOCKS_PER_SEC), bytesToHexString(hash.result, 32).data());
+		}
+
+		#ifdef FULL
+			startTime = clock();
+			ethash_compute_full_data(full_mem, &params, &cache);
+			time = clock() - startTime;
+			debugf("ethash_compute_full_data: %ums\n", (unsigned)((time*1000)/CLOCKS_PER_SEC));
+		#endif // FULL
+	}
+
+#ifdef OPENCL
+	ethash_cl_miner miner;
+	{
+		const clock_t startTime = clock();
+		if (!miner.init(params, seed))
+			exit(-1);
+		const clock_t time = clock() - startTime;
+        debugf("ethash_cl_miner init: %ums\n", (unsigned)((time*1000)/CLOCKS_PER_SEC));
+	}
+#endif
+
+
+#ifdef FULL
+    {
+        const clock_t startTime = clock();
+		ethash_return_value hash;
+        ethash_full(&hash, full_mem, &params, previous_hash, 0);
+        const clock_t time = clock() - startTime;
+        debugf("ethash_full test: %uns, %s\n", (unsigned)((time*1000000)/CLOCKS_PER_SEC), bytesToHexString(hash.result, 32).data());
+    }
+#endif
+
+#ifdef OPENCL
+	// validate 1024 hashes against CPU
+	miner.hash(g_hashes, previous_hash, 0, 1024);
+	for (unsigned i = 0; i != 1024; ++i)
+	{
+		ethash_return_value hash;
+		ethash_light(&hash, &cache, &params, previous_hash, i);
+		if (memcmp(hash.result, g_hashes + 32*i, 32) != 0)
+		{
+			debugf("nonce %u failed: %s %s\n", i, bytesToHexString(g_hashes + 32*i, 32).c_str(), bytesToHexString(hash.result, 32).c_str());
+			static unsigned c = 0;
+			if (++c == 16)
+			{
+				exit(-1);
+			}
+		}
+	}
+#endif
+
+
+	clock_t startTime = clock();
+	unsigned hash_count = trials;
+	
+	#ifdef OPENCL
+	{
+		struct search_hook : ethash_cl_miner::search_hook
+		{
+			unsigned hash_count;
+			std::vector<uint64_t> nonce_vec;
+
+			virtual bool found(uint64_t const* nonces, uint32_t count)
+			{
+				nonce_vec.assign(nonces, nonces + count);
+				return false;
+			}
+
+			virtual bool searched(uint64_t start_nonce, uint32_t count)
+			{
+				// do nothing
+				hash_count += count;
+				return hash_count >= trials;
+			}
+		};
+		search_hook hook;
+		hook.hash_count = 0;
+
+		miner.search(previous_hash, 0x000000ffffffffff, hook);
+
+		for (unsigned i = 0; i != hook.nonce_vec.size(); ++i)
+		{
+			uint64_t nonce = hook.nonce_vec[i];
+			ethash_return_value hash;
+			ethash_light(&hash, &cache, &params, previous_hash, nonce);
+			debugf("found: %.8x%.8x -> %s\n", unsigned(nonce>>32), unsigned(nonce), bytesToHexString(hash.result, 32).c_str());
+		}
+
+		hash_count = hook.hash_count;
+	}
+	#else
+	{
+		//#pragma omp parallel for
+		for (int nonce = 0; nonce < trials; ++nonce)
+		{
+			ethash_return_value hash;
+			#ifdef FULL
+				ethash_full(&hash, full_mem, &params, previous_hash, nonce);
+			#else
+				ethash_light(&hash, &cache, &params, previous_hash, nonce);
+			#endif // FULL
+		}
+	}
+	#endif
+	
+	clock_t time = std::max((clock_t)1u, clock() - startTime);
+	
+	unsigned read_size = ACCESSES * MIX_BYTES;
+	debugf(			
+		"hashrate: %8u, bw: %6u MB/s\n",
+		(unsigned)(((uint64_t)hash_count*CLOCKS_PER_SEC)/time),
+		(unsigned)((((uint64_t)hash_count*read_size*CLOCKS_PER_SEC)/time) / (1024*1024))
+		);
+
+	free(cache_mem_buf);
+#ifdef FULL
+	free(full_mem_buf);
+#endif
+
+	return 0;
+}

Godeps/_workspace/src/github.com/ethereum/ethash/cmake/modules/FindCryptoPP.cmake

+# Module for locating the Crypto++ encryption library.
+#
+# Customizable variables:
+#   CRYPTOPP_ROOT_DIR
+#     This variable points to the CryptoPP root directory. On Windows the
+#     library location typically will have to be provided explicitly using the
+#     -D command-line option. The directory should include the include/cryptopp,
+#     lib and/or bin sub-directories.
+#
+# Read-only variables:
+#   CRYPTOPP_FOUND
+#     Indicates whether the library has been found.
+#
+#   CRYPTOPP_INCLUDE_DIRS
+#     Points to the CryptoPP include directory.
+#
+#   CRYPTOPP_LIBRARIES
+#     Points to the CryptoPP libraries that should be passed to
+#     target_link_libararies.
+#
+#
+# Copyright (c) 2012 Sergiu Dotenco
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+INCLUDE (FindPackageHandleStandardArgs)
+
+FIND_PATH (CRYPTOPP_ROOT_DIR
+  NAMES cryptopp/cryptlib.h include/cryptopp/cryptlib.h
+  PATHS ENV CRYPTOPPROOT
+  DOC "CryptoPP root directory")
+
+# Re-use the previous path:
+FIND_PATH (CRYPTOPP_INCLUDE_DIR
+  NAMES cryptopp/cryptlib.h
+  HINTS ${CRYPTOPP_ROOT_DIR}
+  PATH_SUFFIXES include
+  DOC "CryptoPP include directory")
+
+FIND_LIBRARY (CRYPTOPP_LIBRARY_DEBUG
+  NAMES cryptlibd cryptoppd
+  HINTS ${CRYPTOPP_ROOT_DIR}
+  PATH_SUFFIXES lib
+  DOC "CryptoPP debug library")
+
+FIND_LIBRARY (CRYPTOPP_LIBRARY_RELEASE
+  NAMES cryptlib cryptopp
+  HINTS ${CRYPTOPP_ROOT_DIR}
+  PATH_SUFFIXES lib
+  DOC "CryptoPP release library")
+
+IF (CRYPTOPP_LIBRARY_DEBUG AND CRYPTOPP_LIBRARY_RELEASE)
+  SET (CRYPTOPP_LIBRARY
+    optimized ${CRYPTOPP_LIBRARY_RELEASE}
+    debug ${CRYPTOPP_LIBRARY_DEBUG} CACHE DOC "CryptoPP library")
+ELSEIF (CRYPTOPP_LIBRARY_RELEASE)
+  SET (CRYPTOPP_LIBRARY ${CRYPTOPP_LIBRARY_RELEASE} CACHE DOC
+    "CryptoPP library")
+ENDIF (CRYPTOPP_LIBRARY_DEBUG AND CRYPTOPP_LIBRARY_RELEASE)
+
+IF (CRYPTOPP_INCLUDE_DIR)
+  SET (_CRYPTOPP_VERSION_HEADER ${CRYPTOPP_INCLUDE_DIR}/cryptopp/config.h)
+
+  IF (EXISTS ${_CRYPTOPP_VERSION_HEADER})
+    FILE (STRINGS ${_CRYPTOPP_VERSION_HEADER} _CRYPTOPP_VERSION_TMP REGEX
+      "^#define CRYPTOPP_VERSION[ \t]+[0-9]+$")
+
+    STRING (REGEX REPLACE
+      "^#define CRYPTOPP_VERSION[ \t]+([0-9]+)" "\\1" _CRYPTOPP_VERSION_TMP
+      ${_CRYPTOPP_VERSION_TMP})
+
+    STRING (REGEX REPLACE "([0-9]+)[0-9][0-9]" "\\1" CRYPTOPP_VERSION_MAJOR
+      ${_CRYPTOPP_VERSION_TMP})
+    STRING (REGEX REPLACE "[0-9]([0-9])[0-9]" "\\1" CRYPTOPP_VERSION_MINOR
+      ${_CRYPTOPP_VERSION_TMP})
+    STRING (REGEX REPLACE "[0-9][0-9]([0-9])" "\\1" CRYPTOPP_VERSION_PATCH
+      ${_CRYPTOPP_VERSION_TMP})
+
+    SET (CRYPTOPP_VERSION_COUNT 3)
+    SET (CRYPTOPP_VERSION
+      ${CRYPTOPP_VERSION_MAJOR}.${CRYPTOPP_VERSION_MINOR}.${CRYPTOPP_VERSION_PATCH})
+  ENDIF (EXISTS ${_CRYPTOPP_VERSION_HEADER})
+ENDIF (CRYPTOPP_INCLUDE_DIR)
+
+SET (CRYPTOPP_INCLUDE_DIRS ${CRYPTOPP_INCLUDE_DIR})
+SET (CRYPTOPP_LIBRARIES ${CRYPTOPP_LIBRARY})
+
+MARK_AS_ADVANCED (CRYPTOPP_INCLUDE_DIR CRYPTOPP_LIBRARY CRYPTOPP_LIBRARY_DEBUG
+  CRYPTOPP_LIBRARY_RELEASE)
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS (CryptoPP REQUIRED_VARS CRYPTOPP_ROOT_DIR
+  CRYPTOPP_INCLUDE_DIR CRYPTOPP_LIBRARY VERSION_VAR CRYPTOPP_VERSION)
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/cmake/modules/FindOpenCL.cmake

+#
+#  This file taken from FindOpenCL project @ http://gitorious.com/findopencl
+#
+# - Try to find OpenCL
+# This module tries to find an OpenCL implementation on your system. It supports
+# AMD / ATI, Apple and NVIDIA implementations, but shoudl work, too.
+#
+# Once done this will define
+#  OPENCL_FOUND        - system has OpenCL
+#  OPENCL_INCLUDE_DIRS  - the OpenCL include directory
+#  OPENCL_LIBRARIES    - link these to use OpenCL
+#
+# WIN32 should work, but is untested
+
+FIND_PACKAGE( PackageHandleStandardArgs )
+
+SET (OPENCL_VERSION_STRING "0.1.0")
+SET (OPENCL_VERSION_MAJOR 0)
+SET (OPENCL_VERSION_MINOR 1)
+SET (OPENCL_VERSION_PATCH 0)
+
+IF (APPLE)
+
+  FIND_LIBRARY(OPENCL_LIBRARIES OpenCL DOC "OpenCL lib for OSX")
+  FIND_PATH(OPENCL_INCLUDE_DIRS OpenCL/cl.h DOC "Include for OpenCL on OSX")
+  FIND_PATH(_OPENCL_CPP_INCLUDE_DIRS OpenCL/cl.hpp DOC "Include for OpenCL CPP bindings on OSX")
+
+ELSE (APPLE)
+
+	IF (WIN32)
+	
+	    FIND_PATH(OPENCL_INCLUDE_DIRS CL/cl.h)
+	    FIND_PATH(_OPENCL_CPP_INCLUDE_DIRS CL/cl.hpp)
+	
+	    # The AMD SDK currently installs both x86 and x86_64 libraries
+	    # This is only a hack to find out architecture
+	    IF( ${CMAKE_SYSTEM_PROCESSOR} STREQUAL "AMD64" )
+	    	SET(OPENCL_LIB_DIR "$ENV{ATISTREAMSDKROOT}/lib/x86_64")
+			SET(OPENCL_LIB_DIR "$ENV{ATIINTERNALSTREAMSDKROOT}/lib/x86_64")
+	    ELSE (${CMAKE_SYSTEM_PROCESSOR} STREQUAL "AMD64")
+	    	SET(OPENCL_LIB_DIR "$ENV{ATISTREAMSDKROOT}/lib/x86")
+	   		SET(OPENCL_LIB_DIR "$ENV{ATIINTERNALSTREAMSDKROOT}/lib/x86")
+	    ENDIF( ${CMAKE_SYSTEM_PROCESSOR} STREQUAL "AMD64" )
+
+	    # find out if the user asked for a 64-bit build, and use the corresponding 
+	    # 64 or 32 bit NVIDIA library paths to the search:
+	    STRING(REGEX MATCH "Win64" ISWIN64 ${CMAKE_GENERATOR})
+	    IF("${ISWIN64}" STREQUAL "Win64") 
+	    	FIND_LIBRARY(OPENCL_LIBRARIES OpenCL.lib ${OPENCL_LIB_DIR} $ENV{CUDA_LIB_PATH} $ENV{CUDA_PATH}/lib/x64)
+	    ELSE("${ISWIN64}" STREQUAL "Win64") 
+	    	FIND_LIBRARY(OPENCL_LIBRARIES OpenCL.lib ${OPENCL_LIB_DIR} $ENV{CUDA_LIB_PATH} $ENV{CUDA_PATH}/lib/Win32)
+	    ENDIF("${ISWIN64}" STREQUAL "Win64") 
+
+	    GET_FILENAME_COMPONENT(_OPENCL_INC_CAND ${OPENCL_LIB_DIR}/../../include ABSOLUTE)
+	    
+	    # On Win32 search relative to the library
+	    FIND_PATH(OPENCL_INCLUDE_DIRS CL/cl.h PATHS "${_OPENCL_INC_CAND}" $ENV{CUDA_INC_PATH} $ENV{CUDA_PATH}/include)
+	    FIND_PATH(_OPENCL_CPP_INCLUDE_DIRS CL/cl.hpp PATHS "${_OPENCL_INC_CAND}" $ENV{CUDA_INC_PATH} $ENV{CUDA_PATH}/include)
+	
+	ELSE (WIN32)
+
+            # Unix style platforms
+            FIND_LIBRARY(OPENCL_LIBRARIES OpenCL
+              ENV LD_LIBRARY_PATH
+            )
+
+            GET_FILENAME_COMPONENT(OPENCL_LIB_DIR ${OPENCL_LIBRARIES} PATH)
+            GET_FILENAME_COMPONENT(_OPENCL_INC_CAND ${OPENCL_LIB_DIR}/../../include ABSOLUTE)
+
+            # The AMD SDK currently does not place its headers
+            # in /usr/include, therefore also search relative
+            # to the library
+            FIND_PATH(OPENCL_INCLUDE_DIRS CL/cl.h PATHS ${_OPENCL_INC_CAND} "/usr/local/cuda/include")
+            FIND_PATH(_OPENCL_CPP_INCLUDE_DIRS CL/cl.hpp PATHS ${_OPENCL_INC_CAND} "/usr/local/cuda/include")
+
+	ENDIF (WIN32)
+
+ENDIF (APPLE)
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS( OpenCL DEFAULT_MSG OPENCL_LIBRARIES OPENCL_INCLUDE_DIRS )
+
+IF( _OPENCL_CPP_INCLUDE_DIRS )
+	SET( OPENCL_HAS_CPP_BINDINGS TRUE )
+	LIST( APPEND OPENCL_INCLUDE_DIRS ${_OPENCL_CPP_INCLUDE_DIRS} )
+	# This is often the same, so clean up
+	LIST( REMOVE_DUPLICATES OPENCL_INCLUDE_DIRS )
+ENDIF( _OPENCL_CPP_INCLUDE_DIRS )
+
+MARK_AS_ADVANCED(
+  OPENCL_INCLUDE_DIRS
+)
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/cryptopp/CMakeLists.txt

+set(LIBRARY cryptopp)
+
+include_directories(../../cryptopp)
+
+# todo, subset
+file(GLOB HEADERS "../../cryptopp/*.h")
+file(GLOB SOURCE "../../cryptopp/*.cpp")
+
+add_library(${LIBRARY} ${HEADERS} ${SOURCE})
+
+set(CRYPTOPP_INCLUDE_DIRS "../.." PARENT_SCOPE)
+set(CRYPTOPP_LIBRARIES ${LIBRARY} PARENT_SCOPE)
+set(CRYPTOPP_FOUND TRUE PARENT_SCOPE)

Godeps/_workspace/src/github.com/ethereum/ethash/ethash.go

+package ethash
+
+/*
+#cgo CFLAGS: -std=gnu99 -Wall
+#include "libethash/ethash.h"
+#include "libethash/util.c"
+#include "libethash/internal.c"
+#include "libethash/sha3.c"
+*/
+import "C"
+
+import (
+	"bytes"
+	"encoding/binary"
+	"log"
+	"math/big"
+	"math/rand"
+	"sync"
+	"time"
+	"unsafe"
+
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/pow"
+)
+
+var powlogger = logger.NewLogger("POW")
+
+type DAG struct {
+	SeedBlockNum uint64
+	dag          unsafe.Pointer // full GB of memory for dag
+}
+
+type ParamsAndCache struct {
+	params       *C.ethash_params
+	cache        *C.ethash_cache
+	SeedBlockNum uint64
+}
+
+type Ethash struct {
+	turbo          bool
+	HashRate       int64
+	chainManager   pow.ChainManager
+	dag            *DAG
+	paramsAndCache *ParamsAndCache
+	nextdag        unsafe.Pointer
+	ret            *C.ethash_return_value
+	dagMutex       *sync.Mutex
+	cacheMutex     *sync.Mutex
+}
+
+func parseNonce(nonce []byte) (uint64, error) {
+	nonceBuf := bytes.NewBuffer(nonce)
+	nonceInt, err := binary.ReadUvarint(nonceBuf)
+	if err != nil {
+		return 0, err
+	}
+	return nonceInt, nil
+}
+
+const epochLength uint64 = 30000
+
+func getSeedBlockNum(blockNum uint64) uint64 {
+	var seedBlockNum uint64 = 0
+	if blockNum >= 2*epochLength {
+		seedBlockNum = ((blockNum / epochLength) - 1) * epochLength
+	}
+	return seedBlockNum
+}
+
+func makeParamsAndCache(chainManager pow.ChainManager, blockNum uint64) *ParamsAndCache {
+	seedBlockNum := getSeedBlockNum(blockNum)
+	paramsAndCache := &ParamsAndCache{
+		params:       new(C.ethash_params),
+		cache:        new(C.ethash_cache),
+		SeedBlockNum: seedBlockNum,
+	}
+	C.ethash_params_init(paramsAndCache.params, C.uint32_t(seedBlockNum))
+	paramsAndCache.cache.mem = C.malloc(paramsAndCache.params.cache_size)
+	seedHash := chainManager.GetBlockByNumber(seedBlockNum).Header().Hash()
+	log.Println("Params", paramsAndCache.params)
+
+	log.Println("Making Cache")
+	start := time.Now()
+	C.ethash_mkcache(paramsAndCache.cache, paramsAndCache.params, (*C.uint8_t)((unsafe.Pointer)(&seedHash[0])))
+	log.Println("Took:", time.Since(start))
+	return paramsAndCache
+}
+
+func (pow *Ethash) updateCache() {
+	pow.cacheMutex.Lock()
+	seedNum := getSeedBlockNum(pow.chainManager.CurrentBlock().NumberU64())
+	if pow.paramsAndCache.SeedBlockNum != seedNum {
+		pow.paramsAndCache = makeParamsAndCache(pow.chainManager, pow.chainManager.CurrentBlock().NumberU64())
+	}
+	pow.cacheMutex.Unlock()
+}
+
+func makeDAG(p *ParamsAndCache) *DAG {
+	d := &DAG{
+		dag:          C.malloc(p.params.full_size),
+		SeedBlockNum: p.SeedBlockNum,
+	}
+	C.ethash_compute_full_data(d.dag, p.params, p.cache)
+	return d
+}
+
+func (pow *Ethash) updateDAG() {
+	pow.cacheMutex.Lock()
+	pow.dagMutex.Lock()
+
+	seedNum := getSeedBlockNum(pow.chainManager.CurrentBlock().NumberU64())
+	if pow.dag == nil || pow.dag.SeedBlockNum != seedNum {
+		pow.dag = nil
+		log.Println("Making Dag")
+		start := time.Now()
+		pow.dag = makeDAG(pow.paramsAndCache)
+		log.Println("Took:", time.Since(start))
+	}
+
+	pow.dagMutex.Unlock()
+	pow.cacheMutex.Unlock()
+}
+
+func New(chainManager pow.ChainManager) *Ethash {
+	return &Ethash{
+		turbo:          false,
+		paramsAndCache: makeParamsAndCache(chainManager, chainManager.CurrentBlock().NumberU64()),
+		chainManager:   chainManager,
+		dag:            nil,
+		ret:            new(C.ethash_return_value),
+		cacheMutex:     new(sync.Mutex),
+		dagMutex:       new(sync.Mutex),
+	}
+}
+
+func (pow *Ethash) DAGSize() uint64 {
+	return uint64(pow.paramsAndCache.params.full_size)
+}
+
+func (pow *Ethash) CacheSize() uint64 {
+	return uint64(pow.paramsAndCache.params.cache_size)
+}
+
+func (pow *Ethash) GetSeedHash(blockNum uint64) []byte {
+	return pow.chainManager.GetBlockByNumber(getSeedBlockNum(blockNum)).Header().Hash()
+}
+
+func (pow *Ethash) Stop() {
+	pow.cacheMutex.Lock()
+	pow.dagMutex.Lock()
+	if pow.paramsAndCache.cache != nil {
+		C.free(pow.paramsAndCache.cache.mem)
+	}
+	if pow.dag != nil {
+		C.free(pow.dag.dag)
+	}
+	pow.dagMutex.Unlock()
+	pow.cacheMutex.Unlock()
+}
+
+func (pow *Ethash) Search(block pow.Block, stop <-chan struct{}) ([]byte, []byte, []byte) {
+	pow.updateDAG()
+
+	// Not very elegant, multiple mining instances are not supported
+	pow.dagMutex.Lock()
+	pow.cacheMutex.Lock()
+	defer pow.cacheMutex.Unlock()
+	defer pow.dagMutex.Unlock()
+
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	miningHash := block.HashNoNonce()
+	diff := block.Difficulty()
+	log.Println("difficulty", diff)
+	i := int64(0)
+	start := time.Now().UnixNano()
+	t := time.Now()
+
+	nonce := uint64(r.Int63())
+
+	for {
+		select {
+		case <-stop:
+			powlogger.Infoln("Breaking from mining")
+			pow.HashRate = 0
+			pow.dagMutex.Unlock()
+			return nil, nil, nil
+		default:
+			i++
+
+			if time.Since(t) > (1 * time.Second) {
+				elapsed := time.Now().UnixNano() - start
+				hashes := ((float64(1e9) / float64(elapsed)) * float64(i)) / 1000
+				pow.HashRate = int64(hashes)
+				powlogger.Infoln("Hashing @", pow.HashRate, "khash")
+
+				t = time.Now()
+			}
+
+			cMiningHash := (*C.uint8_t)(unsafe.Pointer(&miningHash))
+			cnonce := C.uint64_t(nonce)
+			log.Printf("seed hash, nonce: %x %x\n", miningHash, nonce)
+			// pow.hash is the output/return of ethash_full
+			C.ethash_full(pow.ret, pow.dag.dag, pow.paramsAndCache.params, cMiningHash, cnonce)
+			res := C.ethash_check_difficulty((*C.uint8_t)(&pow.ret.result[0]), (*C.uint8_t)(unsafe.Pointer(&diff.Bytes()[0])))
+			if res == 1 {
+				mixDigest := C.GoBytes(unsafe.Pointer(&pow.ret.mix_hash[0]), 32)
+				// We don't really nead 32 bytes here
+				buf := make([]byte, 32)
+				binary.PutUvarint(buf, nonce)
+				return buf, mixDigest, pow.GetSeedHash(block.NumberU64())
+			}
+			nonce += 1
+		}
+
+		if !pow.turbo {
+			time.Sleep(20 * time.Microsecond)
+		}
+	}
+}
+
+func (pow *Ethash) Verify(block pow.Block) bool {
+	// Make sure the SeedHash is set correctly
+	if bytes.Compare(block.SeedHash(), pow.GetSeedHash(block.NumberU64())) != 0 {
+		log.Println("Block had wrong SeedHash")
+		log.Println("Expected: ", pow.GetSeedHash(block.NumberU64()))
+		log.Println("Actual: ", block.SeedHash())
+		return false
+	}
+
+	nonceInt, err := parseNonce(block.Nonce())
+	if err != nil {
+		log.Println("nonce to int err:", err)
+		return false
+	}
+	return pow.verify(block.HashNoNonce(), block.MixDigest(), block.Difficulty(), block.NumberU64(), nonceInt)
+}
+
+func (pow *Ethash) verify(hash []byte, mixDigest []byte, difficulty *big.Int, blockNum uint64, nonce uint64) bool {
+	// First check: make sure header, mixDigest, nonce are correct without hitting the DAG
+	// This is to prevent DOS attacks
+	chash := (*C.uint8_t)(unsafe.Pointer(&hash))
+	cnonce := C.uint64_t(nonce)
+	cmixDigest := (*C.uint8_t)(unsafe.Pointer(&mixDigest))
+	cdifficulty := (*C.uint8_t)(unsafe.Pointer(&difficulty.Bytes()[0]))
+	if C.ethash_quick_check_difficulty(chash, cnonce, cmixDigest, cdifficulty) != 1 {
+		log.Println("Failed to pass quick check.  Are you sure that the mix digest is correct?")
+		return false
+	}
+
+	var pAc *ParamsAndCache
+	// If its an old block (doesn't use the current cache)
+	// get the cache for it but don't update (so we don't need the mutex)
+	// Otherwise, it's the current block or a future.
+	// If current, updateCache will do nothing.
+	if getSeedBlockNum(blockNum) < pow.paramsAndCache.SeedBlockNum {
+		pAc = makeParamsAndCache(pow.chainManager, blockNum)
+	} else {
+		pow.updateCache()
+		pow.cacheMutex.Lock()
+		defer pow.cacheMutex.Unlock()
+		pAc = pow.paramsAndCache
+	}
+
+	C.ethash_light(pow.ret, pAc.cache, pAc.params, chash, cnonce)
+	res := C.ethash_check_difficulty((*C.uint8_t)(unsafe.Pointer(&pow.ret.result[0])), cdifficulty)
+	return res == 1
+}
+
+func (pow *Ethash) GetHashrate() int64 {
+	return pow.HashRate
+}
+
+func (pow *Ethash) Turbo(on bool) {
+	pow.turbo = on
+}
+
+func (pow *Ethash) FullHash(nonce uint64, miningHash []byte) []byte {
+	pow.updateDAG()
+	pow.dagMutex.Lock()
+	defer pow.dagMutex.Unlock()
+	cMiningHash := (*C.uint8_t)(unsafe.Pointer(&miningHash))
+	cnonce := C.uint64_t(nonce)
+	log.Println("seed hash, nonce:", miningHash, nonce)
+	// pow.hash is the output/return of ethash_full
+	C.ethash_full(pow.ret, pow.dag.dag, pow.paramsAndCache.params, cMiningHash, cnonce)
+	ghash_full := C.GoBytes(unsafe.Pointer(&pow.ret.result[0]), 32)
+	return ghash_full
+}
+
+func (pow *Ethash) LightHash(nonce uint64, miningHash []byte) []byte {
+	cMiningHash := (*C.uint8_t)(unsafe.Pointer(&miningHash))
+	cnonce := C.uint64_t(nonce)
+	C.ethash_light(pow.ret, pow.paramsAndCache.cache, pow.paramsAndCache.params, cMiningHash, cnonce)
+	ghash_light := C.GoBytes(unsafe.Pointer(&pow.ret.result[0]), 32)
+	return ghash_light
+}

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cl/CMakeLists.txt

+set(LIBRARY ethash-cl)
+set(CMAKE_BUILD_TYPE Release)
+
+if (NOT OPENCL_FOUND)
+	find_package(OpenCL)
+endif()
+if (OPENCL_FOUND)
+	include_directories(${OPENCL_INCLUDE_DIRS})
+	include_directories(..)
+	add_library(${LIBRARY} ethash_cl_miner.cpp ethash_cl_miner.h)
+	TARGET_LINK_LIBRARIES(${LIBRARY} ${OPENCL_LIBRARIES} ethash)
+endif()
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cl/ethash_cl_miner.h

+#pragma once
+
+#define __CL_ENABLE_EXCEPTIONS 
+#define CL_USE_DEPRECATED_OPENCL_2_0_APIS
+#include "cl.hpp"
+#include <time.h>
+#include <libethash/ethash.h>
+
+class ethash_cl_miner
+{
+public:
+	struct search_hook
+	{
+		// reports progress, return true to abort
+		virtual bool found(uint64_t const* nonces, uint32_t count) = 0;
+		virtual bool searched(uint64_t start_nonce, uint32_t count) = 0;
+	};
+
+public:
+	ethash_cl_miner();
+
+	bool init(ethash_params const& params, const uint8_t seed[32], unsigned workgroup_size = 64);
+
+	void hash(uint8_t* ret, uint8_t const* header, uint64_t nonce, unsigned count);
+	void search(uint8_t const* header, uint64_t target, search_hook& hook);
+
+private:
+	static unsigned const c_max_search_results = 63;
+	static unsigned const c_num_buffers = 2;
+	static unsigned const c_hash_batch_size = 1024;
+	static unsigned const c_search_batch_size = 1024*256;
+
+	ethash_params m_params;
+	cl::Context m_context;
+	cl::CommandQueue m_queue;
+	cl::Kernel m_hash_kernel;
+	cl::Kernel m_search_kernel;
+	cl::Buffer m_dag;
+	cl::Buffer m_header;
+	cl::Buffer m_hash_buf[c_num_buffers];
+	cl::Buffer m_search_buf[c_num_buffers];
+	unsigned m_workgroup_size;
+};
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cuda/CMakeLists.txt

+find_package(CUDA)
+ 
+# Pass options to NVCC
+
+ 
+if (CUDA_FOUND)
+set(CUDA_NVCC_FLAGS "   -gencode;arch=compute_30,code=sm_30;
+                        -gencode;arch=compute_20,code=sm_20;
+                        -gencode;arch=compute_11,code=sm_11;
+                        -gencode;arch=compute_12,code=sm_12;
+                        -gencode;arch=compute_13,code=sm_13;")
+cuda_add_executable(
+    ethash-cuda
+    libethash.cu)
+endif()
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cuda/cuPrintf.cuh

+/*
+	Copyright 2009 NVIDIA Corporation.  All rights reserved.
+
+	NOTICE TO LICENSEE:   
+
+	This source code and/or documentation ("Licensed Deliverables") are subject 
+	to NVIDIA intellectual property rights under U.S. and international Copyright 
+	laws.  
+
+	These Licensed Deliverables contained herein is PROPRIETARY and CONFIDENTIAL 
+	to NVIDIA and is being provided under the terms and conditions of a form of 
+	NVIDIA software license agreement by and between NVIDIA and Licensee ("License 
+	Agreement") or electronically accepted by Licensee.  Notwithstanding any terms 
+	or conditions to the contrary in the License Agreement, reproduction or 
+	disclosure of the Licensed Deliverables to any third party without the express 
+	written consent of NVIDIA is prohibited.     
+
+	NOTWITHSTANDING ANY TERMS OR CONDITIONS TO THE CONTRARY IN THE LICENSE AGREEMENT, 
+	NVIDIA MAKES NO REPRESENTATION ABOUT THE SUITABILITY OF THESE LICENSED 
+	DELIVERABLES FOR ANY PURPOSE.  IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED 
+	WARRANTY OF ANY KIND. NVIDIA DISCLAIMS ALL WARRANTIES WITH REGARD TO THESE 
+	LICENSED DELIVERABLES, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY, 
+	NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE.   NOTWITHSTANDING ANY 
+	TERMS OR CONDITIONS TO THE CONTRARY IN THE LICENSE AGREEMENT, IN NO EVENT SHALL 
+	NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, 
+	OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,	WHETHER 
+	IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,  ARISING OUT OF 
+	OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THESE LICENSED DELIVERABLES.  
+
+	U.S. Government End Users. These Licensed Deliverables are a "commercial item" 
+	as that term is defined at  48 C.F.R. 2.101 (OCT 1995), consisting  of 
+	"commercial computer  software"  and "commercial computer software documentation" 
+	as such terms are  used in 48 C.F.R. 12.212 (SEPT 1995) and is provided to the 
+	U.S. Government only as a commercial end item.  Consistent with 48 C.F.R.12.212 
+	and 48 C.F.R. 227.7202-1 through 227.7202-4 (JUNE 1995), all U.S. Government 
+	End Users acquire the Licensed Deliverables with only those rights set forth 
+	herein. 
+
+	Any use of the Licensed Deliverables in individual and commercial software must 
+	include, in the user documentation and internal comments to the code, the above 
+	Disclaimer and U.S. Government End Users Notice.
+ */
+
+#ifndef CUPRINTF_H
+#define CUPRINTF_H
+
+/*
+ *	This is the header file supporting cuPrintf.cu and defining both
+ *	the host and device-side interfaces. See that file for some more
+ *	explanation and sample use code. See also below for details of the
+ *	host-side interfaces.
+ *
+ *  Quick sample code:
+ *
+	#include "cuPrintf.cu"
+ 	
+	__global__ void testKernel(int val)
+	{
+		cuPrintf("Value is: %d\n", val);
+	}
+
+	int main()
+	{
+		cudaPrintfInit();
+		testKernel<<< 2, 3 >>>(10);
+		cudaPrintfDisplay(stdout, true);
+		cudaPrintfEnd();
+        return 0;
+	}
+ */
+
+///////////////////////////////////////////////////////////////////////////////
+// DEVICE SIDE
+// External function definitions for device-side code
+
+// Abuse of templates to simulate varargs
+__device__ int cuPrintf(const char *fmt);
+template <typename T1> __device__ int cuPrintf(const char *fmt, T1 arg1);
+template <typename T1, typename T2> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2);
+template <typename T1, typename T2, typename T3> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3);
+template <typename T1, typename T2, typename T3, typename T4> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4);
+template <typename T1, typename T2, typename T3, typename T4, typename T5> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5);
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6);
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7);
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8);
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8, typename T9> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9);
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8, typename T9, typename T10> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, T10 arg10);
+
+
+//
+//	cuPrintfRestrict
+//
+//	Called to restrict output to a given thread/block. Pass
+//	the constant CUPRINTF_UNRESTRICTED to unrestrict output
+//	for thread/block IDs. Note you can therefore allow
+//	"all printfs from block 3" or "printfs from thread 2
+//	on all blocks", or "printfs only from block 1, thread 5".
+//
+//	Arguments:
+//		threadid - Thread ID to allow printfs from
+//		blockid - Block ID to allow printfs from
+//
+//	NOTE: Restrictions last between invocations of
+//	kernels unless cudaPrintfInit() is called again.
+//
+#define CUPRINTF_UNRESTRICTED	-1
+__device__ void cuPrintfRestrict(int threadid, int blockid);
+
+
+
+///////////////////////////////////////////////////////////////////////////////
+// HOST SIDE
+// External function definitions for host-side code
+
+//
+//	cudaPrintfInit
+//
+//	Call this once to initialise the printf system. If the output
+//	file or buffer size needs to be changed, call cudaPrintfEnd()
+//	before re-calling cudaPrintfInit().
+//
+//	The default size for the buffer is 1 megabyte. For CUDA
+//	architecture 1.1 and above, the buffer is filled linearly and
+//	is completely used;	however for architecture 1.0, the buffer
+//	is divided into as many segments are there are threads, even
+//	if some threads do not call cuPrintf().
+//
+//	Arguments:
+//		bufferLen - Length, in bytes, of total space to reserve
+//		            (in device global memory) for output.
+//
+//	Returns:
+//		cudaSuccess if all is well.
+//
+extern "C" cudaError_t cudaPrintfInit(size_t bufferLen=1048576);   // 1-meg - that's enough for 4096 printfs by all threads put together
+
+//
+//	cudaPrintfEnd
+//
+//	Cleans up all memories allocated by cudaPrintfInit().
+//	Call this at exit, or before calling cudaPrintfInit() again.
+//
+extern "C" void cudaPrintfEnd();
+
+//
+//	cudaPrintfDisplay
+//
+//	Dumps the contents of the output buffer to the specified
+//	file pointer. If the output pointer is not specified,
+//	the default "stdout" is used.
+//
+//	Arguments:
+//		outputFP     - A file pointer to an output stream.
+//		showThreadID - If "true", output strings are prefixed
+//		               by "[blockid, threadid] " at output.
+//
+//	Returns:
+//		cudaSuccess if all is well.
+//
+extern "C" cudaError_t cudaPrintfDisplay(void *outputFP=NULL, bool showThreadID=false);
+
+#endif  // CUPRINTF_H

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cuda/libethash.cu

+#include "cuPrintf.cu"
+#include <stdio.h>
+
+__global__ void device_greetings(void)
+{
+	cuPrintf("Hello, world from the device!\n");
+}
+
+int main(void)
+{
+	// greet from the host
+	printf("Hello, world from the host!\n");
+
+	// initialize cuPrintf
+	cudaPrintfInit();
+
+	// launch a kernel with a single thread to greet from the device
+	device_greetings<<<1,1>>>();
+
+	// display the device's greeting
+	cudaPrintfDisplay();
+
+	// clean up after cuPrintf
+	cudaPrintfEnd();
+
+	return 0;
+}

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/CMakeLists.txt

+set(LIBRARY ethash)
+set(CMAKE_BUILD_TYPE Release)
+
+if (NOT MSVC)
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
+endif()
+
+set(FILES 	util.c
+          	util.h
+          	internal.c
+          	ethash.h
+          	endian.h
+          	compiler.h
+          	fnv.h
+          	data_sizes.h)
+
+if (NOT CRYPTOPP_FOUND)
+	find_package(CryptoPP 5.6.2)
+endif()
+
+if (CRYPTOPP_FOUND)
+	add_definitions(-DWITH_CRYPTOPP)
+	include_directories( ${CRYPTOPP_INCLUDE_DIRS} )
+	list(APPEND FILES sha3_cryptopp.cpp sha3_cryptopp.h)
+else()
+	list(APPEND FILES sha3.c sha3.h)
+endif()
+
+add_library(${LIBRARY} ${FILES})
+
+if (CRYPTOPP_FOUND)
+	TARGET_LINK_LIBRARIES(${LIBRARY} ${CRYPTOPP_LIBRARIES})
+endif()
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/compiler.h

+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file compiler.h
+ * @date 2014
+ */
+#pragma once
+
+// Visual Studio doesn't support the inline keyword in C mode
+#if defined(_MSC_VER) && !defined(__cplusplus)
+#define inline __inline
+#endif
+
+// pretend restrict is a standard keyword
+#if defined(_MSC_VER)
+#define restrict __restrict
+#else
+#define restrict __restrict__
+#endif
+

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/endian.h

+#pragma once
+
+#include <stdint.h>
+#include "compiler.h"
+
+static const uint8_t BitReverseTable256[] =
+        {
+                0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
+                0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
+                0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
+                0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
+                0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
+                0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
+                0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
+                0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
+                0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
+                0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
+                0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
+                0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
+                0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
+                0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
+                0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
+                0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
+        };
+
+static inline uint32_t bitfn_swap32(uint32_t a) {
+    return (BitReverseTable256[a & 0xff] << 24) |
+            (BitReverseTable256[(a >> 8) & 0xff] << 16) |
+            (BitReverseTable256[(a >> 16) & 0xff] << 8) |
+            (BitReverseTable256[(a >> 24) & 0xff]);
+}
+
+static inline uint64_t bitfn_swap64(uint64_t a) {
+    return ((uint64_t) bitfn_swap32((uint32_t) (a >> 32))) |
+            (((uint64_t) bitfn_swap32((uint32_t) a)) << 32);
+}
+
+#if defined(__MINGW32__) || defined(_WIN32)
+  # define LITTLE_ENDIAN 1234
+  # define BYTE_ORDER    LITTLE_ENDIAN
+#elif defined(__FreeBSD__) || defined(__DragonFly__) || defined(__NetBSD__)
+  # include <sys/endian.h>
+#elif defined(__OpenBSD__) || defined(__SVR4)
+  # include <sys/types.h>
+#elif defined(__APPLE__)
+# include <machine/endian.h>
+#elif defined( BSD ) && (BSD >= 199103)
+  # include <machine/endian.h>
+#elif defined( __QNXNTO__ ) && defined( __LITTLEENDIAN__ )
+  # define LITTLE_ENDIAN 1234
+  # define BYTE_ORDER    LITTLE_ENDIAN
+#elif defined( __QNXNTO__ ) && defined( __BIGENDIAN__ )
+  # define BIG_ENDIAN 1234
+  # define BYTE_ORDER    BIG_ENDIAN
+#else
+
+# include <endian.h>
+
+#endif
+
+
+#if LITTLE_ENDIAN == BYTE_ORDER
+
+#define fix_endian32(x) (x)
+#define fix_endian64(x) (x)
+
+#elif BIG_ENDIAN == BYTE_ORDER
+
+#define fix_endian32(x) bitfn_swap32(x)
+#define fix_endian64(x) bitfn_swap64(x)
+
+#else
+# error "endian not supported"
+#endif // BYTE_ORDER
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/ethash.h

+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file ethash.h
+* @date 2015
+*/
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stddef.h>
+#include "compiler.h"
+
+#define REVISION 18
+#define DAGSIZE_BYTES_INIT 1073741824U
+#define DAG_GROWTH 113000000U
+#define EPOCH_LENGTH 30000U
+#define MIX_BYTES 128
+#define DAG_PARENTS 256
+#define CACHE_ROUNDS 3
+#define ACCESSES 64
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct ethash_params {
+    size_t full_size;               // Size of full data set (in bytes, multiple of mix size (128)).
+    size_t cache_size;              // Size of compute cache (in bytes, multiple of node size (64)).
+} ethash_params;
+
+typedef struct ethash_return_value {
+    uint8_t result[32];
+    uint8_t mix_hash[32];
+} ethash_return_value;
+
+size_t const ethash_get_datasize(const uint32_t block_number);
+size_t const ethash_get_cachesize(const uint32_t block_number);
+
+// initialize the parameters
+static inline void ethash_params_init(ethash_params *params, const uint32_t block_number) {
+    params->full_size = ethash_get_datasize(block_number);
+    params->cache_size = ethash_get_cachesize(block_number);
+}
+
+typedef struct ethash_cache {
+    void *mem;
+} ethash_cache;
+
+void ethash_mkcache(ethash_cache *cache, ethash_params const *params, const uint8_t seed[32]);
+void ethash_compute_full_data(void *mem, ethash_params const *params, ethash_cache const *cache);
+void ethash_full(ethash_return_value *ret, void const *full_mem, ethash_params const *params, const uint8_t header_hash[32], const uint64_t nonce);
+void ethash_light(ethash_return_value *ret, ethash_cache const *cache, ethash_params const *params, const uint8_t header_hash[32], const uint64_t nonce);
+
+static inline int ethash_check_difficulty(
+        const uint8_t hash[32],
+        const uint8_t difficulty[32]) {
+    // Difficulty is big endian
+    for (int i = 0; i < 32; i++) {
+        if (hash[i] == difficulty[i]) continue;
+        return hash[i] < difficulty[i];
+    }
+    return 0;
+}
+
+int ethash_quick_check_difficulty(
+        const uint8_t header_hash[32],
+        const uint64_t nonce,
+        const uint8_t mix_hash[32],
+        const uint8_t difficulty[32]);
+
+#ifdef __cplusplus
+}
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/fnv.h

+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file fnv.h
+* @author Matthew Wampler-Doty <negacthulhu@gmail.com>
+* @date 2015
+*/
+
+#pragma once
+#include <stdint.h>
+#include "compiler.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define FNV_PRIME 0x01000193
+
+static inline uint32_t fnv_hash(const uint32_t x, const uint32_t y) {
+	return x*FNV_PRIME ^ y;
+}
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/internal.c

+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file dash.cpp
+* @author Tim Hughes <tim@twistedfury.com>
+* @author Matthew Wampler-Doty
+* @date 2015
+*/
+
+#include <assert.h>
+#include <inttypes.h>
+#include <stddef.h>
+#include "ethash.h"
+#include "fnv.h"
+#include "endian.h"
+#include "internal.h"
+#include "data_sizes.h"
+
+#ifdef WITH_CRYPTOPP
+
+#include "SHA3_cryptopp.h"
+
+#else
+#include "sha3.h"
+#endif // WITH_CRYPTOPP
+
+size_t const ethash_get_datasize(const uint32_t block_number) {
+    assert(block_number / EPOCH_LENGTH < 500);
+    return dag_sizes[block_number / EPOCH_LENGTH];
+}
+
+size_t const ethash_get_cachesize(const uint32_t block_number) {
+    assert(block_number / EPOCH_LENGTH < 500);
+    return cache_sizes[block_number / EPOCH_LENGTH];
+}
+
+// Follows Sergio's "STRICT MEMORY HARD HASHING FUNCTIONS" (2014)
+// https://bitslog.files.wordpress.com/2013/12/memohash-v0-3.pdf
+// SeqMemoHash(s, R, N)
+void static ethash_compute_cache_nodes(
+        node *const nodes,
+        ethash_params const *params,
+        const uint8_t seed[32]) {
+    assert((params->cache_size % sizeof(node)) == 0);
+    uint32_t const num_nodes = (uint32_t)(params->cache_size / sizeof(node));
+
+    SHA3_512(nodes[0].bytes, seed, 32);
+
+    for (unsigned i = 1; i != num_nodes; ++i) {
+        SHA3_512(nodes[i].bytes, nodes[i - 1].bytes, 64);
+    }
+
+    for (unsigned j = 0; j != CACHE_ROUNDS; j++) {
+        for (unsigned i = 0; i != num_nodes; i++) {
+            uint32_t const idx = nodes[i].words[0] % num_nodes;
+            node data;
+            data = nodes[(num_nodes - 1 + i) % num_nodes];
+			for (unsigned w = 0; w != NODE_WORDS; ++w)
+			{
+				data.words[w] ^= nodes[idx].words[w];
+			}
+            SHA3_512(nodes[i].bytes, data.bytes, sizeof(data));
+        }
+    }
+
+    // now perform endian conversion
+#if BYTE_ORDER != LITTLE_ENDIAN
+    for (unsigned w = 0; w != (num_nodes*NODE_WORDS); ++w)
+    {
+        nodes->words[w] = fix_endian32(nodes->words[w]);
+    }
+#endif
+}
+
+void ethash_mkcache(
+  ethash_cache *cache,
+        ethash_params const *params,
+        const uint8_t seed[32]) {
+    node *nodes = (node *) cache->mem;
+    ethash_compute_cache_nodes(nodes, params, seed);
+}
+
+void ethash_calculate_dag_item(
+        node *const ret,
+        const unsigned node_index,
+        const struct ethash_params *params,
+        const struct ethash_cache *cache) {
+
+    uint32_t num_parent_nodes = (uint32_t)(params->cache_size / sizeof(node));
+    node const *cache_nodes = (node const *) cache->mem;
+    node const *init = &cache_nodes[node_index % num_parent_nodes];
+
+	memcpy(ret, init, sizeof(node));
+	ret->words[0] ^= node_index;
+	SHA3_512(ret->bytes, ret->bytes, sizeof(node));
+
+#if defined(_M_X64) && ENABLE_SSE
+    __m128i const fnv_prime = _mm_set1_epi32(FNV_PRIME);
+    __m128i xmm0 = ret->xmm[0];
+    __m128i xmm1 = ret->xmm[1];
+    __m128i xmm2 = ret->xmm[2];
+    __m128i xmm3 = ret->xmm[3];
+#endif
+
+    for (unsigned i = 0; i != DAG_PARENTS; ++i)
+	{
+        uint32_t parent_index = ((node_index ^ i)*FNV_PRIME ^ ret->words[i % NODE_WORDS]) % num_parent_nodes;
+        node const *parent = &cache_nodes[parent_index];
+
+		#if defined(_M_X64) && ENABLE_SSE
+        {
+            xmm0 = _mm_mullo_epi32(xmm0, fnv_prime);
+            xmm1 = _mm_mullo_epi32(xmm1, fnv_prime);
+            xmm2 = _mm_mullo_epi32(xmm2, fnv_prime);
+            xmm3 = _mm_mullo_epi32(xmm3, fnv_prime);
+            xmm0 = _mm_xor_si128(xmm0, parent->xmm[0]);
+            xmm1 = _mm_xor_si128(xmm1, parent->xmm[1]);
+            xmm2 = _mm_xor_si128(xmm2, parent->xmm[2]);
+            xmm3 = _mm_xor_si128(xmm3, parent->xmm[3]);
+
+            // have to write to ret as values are used to compute index
+            ret->xmm[0] = xmm0;
+            ret->xmm[1] = xmm1;
+            ret->xmm[2] = xmm2;
+            ret->xmm[3] = xmm3;
+        }
+        #else
+        {
+            for (unsigned w = 0; w != NODE_WORDS; ++w) {
+                ret->words[w] = fnv_hash(ret->words[w], parent->words[w]);
+            }
+        }
+		#endif
+    }
+
+	SHA3_512(ret->bytes, ret->bytes, sizeof(node));
+}
+
+void ethash_compute_full_data(
+        void *mem,
+        ethash_params const *params,
+        ethash_cache const *cache) {
+    assert((params->full_size % (sizeof(uint32_t) * MIX_WORDS)) == 0);
+    assert((params->full_size % sizeof(node)) == 0);
+    node *full_nodes = mem;
+
+    // now compute full nodes
+    for (unsigned n = 0; n != (params->full_size / sizeof(node)); ++n) {
+        ethash_calculate_dag_item(&(full_nodes[n]), n, params, cache);
+    }
+}
+
+static void ethash_hash(
+        ethash_return_value * ret,
+        node const *full_nodes,
+        ethash_cache const *cache,
+        ethash_params const *params,
+        const uint8_t header_hash[32],
+        const uint64_t nonce) {
+
+    assert((params->full_size % MIX_WORDS) == 0);
+
+    // pack hash and nonce together into first 40 bytes of s_mix
+    assert(sizeof(node)*8 == 512);
+    node s_mix[MIX_NODES + 1];
+    memcpy(s_mix[0].bytes, header_hash, 32);
+
+#if BYTE_ORDER != LITTLE_ENDIAN
+    s_mix[0].double_words[4] = fix_endian64(nonce);
+#else
+    s_mix[0].double_words[4] = nonce;
+#endif
+
+    // compute sha3-512 hash and replicate across mix
+    SHA3_512(s_mix->bytes, s_mix->bytes, 40);
+
+#if BYTE_ORDER != LITTLE_ENDIAN
+    for (unsigned w = 0; w != 16; ++w) {
+        s_mix[0].words[w] = fix_endian32(s_mix[0].words[w]);
+    }
+#endif
+
+    node* const mix = s_mix + 1;
+    for (unsigned w = 0; w != MIX_WORDS; ++w) {
+        mix->words[w] = s_mix[0].words[w % NODE_WORDS];
+    }
+
+    unsigned const
+            page_size = sizeof(uint32_t) * MIX_WORDS,
+            num_full_pages = (unsigned)(params->full_size / page_size);
+
+
+    for (unsigned i = 0; i != ACCESSES; ++i)
+	{
+        uint32_t const index = ((s_mix->words[0] ^ i)*FNV_PRIME ^ mix->words[i % MIX_WORDS]) % num_full_pages;
+
+        for (unsigned n = 0; n != MIX_NODES; ++n)
+		{
+            const node * dag_node = &full_nodes[MIX_NODES * index + n];
+
+            if (!full_nodes) {
+                node tmp_node;
+                ethash_calculate_dag_item(&tmp_node, index * MIX_NODES + n, params, cache);
+                dag_node = &tmp_node;
+            }
+
+			#if defined(_M_X64) && ENABLE_SSE
+            {
+                __m128i fnv_prime = _mm_set1_epi32(FNV_PRIME);
+                __m128i xmm0 = _mm_mullo_epi32(fnv_prime, mix[n].xmm[0]);
+                __m128i xmm1 = _mm_mullo_epi32(fnv_prime, mix[n].xmm[1]);
+                __m128i xmm2 = _mm_mullo_epi32(fnv_prime, mix[n].xmm[2]);
+                __m128i xmm3 = _mm_mullo_epi32(fnv_prime, mix[n].xmm[3]);
+                mix[n].xmm[0] = _mm_xor_si128(xmm0, dag_node->xmm[0]);
+                mix[n].xmm[1] = _mm_xor_si128(xmm1, dag_node->xmm[1]);
+                mix[n].xmm[2] = _mm_xor_si128(xmm2, dag_node->xmm[2]);
+                mix[n].xmm[3] = _mm_xor_si128(xmm3, dag_node->xmm[3]);
+            }
+            #else
+            {
+                for (unsigned w = 0; w != NODE_WORDS; ++w) {
+                    mix[n].words[w] = fnv_hash(mix[n].words[w], dag_node->words[w]);
+                }
+            }
+            #endif
+        }
+
+    }
+
+	// compress mix
+	for (unsigned w = 0; w != MIX_WORDS; w += 4)
+	{
+		uint32_t reduction = mix->words[w+0];
+		reduction = reduction*FNV_PRIME ^ mix->words[w+1];
+		reduction = reduction*FNV_PRIME ^ mix->words[w+2];
+		reduction = reduction*FNV_PRIME ^ mix->words[w+3];
+		mix->words[w/4] = reduction;
+	}
+
+#if BYTE_ORDER != LITTLE_ENDIAN
+    for (unsigned w = 0; w != MIX_WORDS/4; ++w) {
+        mix->words[w] = fix_endian32(mix->words[w]);
+    }
+#endif
+
+    memcpy(ret->mix_hash, mix->bytes, 32);
+    // final Keccak hash
+    SHA3_256(ret->result, s_mix->bytes, 64+32);	// Keccak-256(s + compressed_mix)
+}
+
+void ethash_quick_hash(
+        uint8_t return_hash[32],
+        const uint8_t header_hash[32],
+        const uint64_t nonce,
+        const uint8_t mix_hash[32]) {
+
+    uint8_t buf[64+32];
+    memcpy(buf, header_hash, 32);
+#if BYTE_ORDER != LITTLE_ENDIAN
+    nonce = fix_endian64(nonce);
+#endif
+    memcpy(&(buf[32]), &nonce, 8);
+    SHA3_512(buf, buf, 40);
+    memcpy(&(buf[64]), mix_hash, 32);
+    SHA3_256(return_hash, buf, 64+32);
+}
+
+int ethash_quick_check_difficulty(
+        const uint8_t header_hash[32],
+        const uint64_t nonce,
+        const uint8_t mix_hash[32],
+        const uint8_t difficulty[32]) {
+    uint8_t return_hash[32];
+    ethash_quick_hash(return_hash, header_hash, nonce, mix_hash);
+    return ethash_check_difficulty(return_hash, difficulty);
+}
+
+void ethash_full(ethash_return_value * ret, void const *full_mem, ethash_params const *params, const uint8_t previous_hash[32], const uint64_t nonce) {
+    ethash_hash(ret, (node const *) full_mem, NULL, params, previous_hash, nonce);
+}
+
+void ethash_light(ethash_return_value * ret, ethash_cache const *cache, ethash_params const *params, const uint8_t previous_hash[32], const uint64_t nonce) {
+    ethash_hash(ret, NULL, cache, params, previous_hash, nonce);
+}

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/internal.h

+#pragma once
+#include "compiler.h"
+#include "endian.h"
+#include "ethash.h"
+
+#define ENABLE_SSE 1
+
+#if defined(_M_X64) && ENABLE_SSE
+#include <smmintrin.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// compile time settings
+#define NODE_WORDS (64/4)
+#define MIX_WORDS (MIX_BYTES/4)
+#define MIX_NODES (MIX_WORDS / NODE_WORDS)
+#include <stdint.h>
+
+typedef union node {
+    uint8_t bytes[NODE_WORDS * 4];
+    uint32_t words[NODE_WORDS];
+    uint64_t double_words[NODE_WORDS / 2];
+
+#if defined(_M_X64) && ENABLE_SSE
+	__m128i xmm[NODE_WORDS/4];
+#endif
+
+} node;
+
+void ethash_calculate_dag_item(
+        node *const ret,
+        const unsigned node_index,
+        ethash_params const *params,
+        ethash_cache const *cache
+);
+
+void ethash_quick_hash(
+        uint8_t return_hash[32],
+        const uint8_t header_hash[32],
+        const uint64_t nonce,
+        const uint8_t mix_hash[32]);
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/sha3.c

+/** libkeccak-tiny
+*
+* A single-file implementation of SHA-3 and SHAKE.
+*
+* Implementor: David Leon Gil
+* License: CC0, attribution kindly requested. Blame taken too,
+* but not liability.
+*/
+#include "sha3.h"
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/******** The Keccak-f[1600] permutation ********/
+
+/*** Constants. ***/
+static const uint8_t rho[24] = \
+  { 1,  3,   6, 10, 15, 21,
+        28, 36, 45, 55,  2, 14,
+        27, 41, 56,  8, 25, 43,
+        62, 18, 39, 61, 20, 44};
+static const uint8_t pi[24] = \
+  {10,  7, 11, 17, 18, 3,
+        5, 16,  8, 21, 24, 4,
+        15, 23, 19, 13, 12, 2,
+        20, 14, 22,  9, 6,  1};
+static const uint64_t RC[24] = \
+  {1ULL, 0x8082ULL, 0x800000000000808aULL, 0x8000000080008000ULL,
+        0x808bULL, 0x80000001ULL, 0x8000000080008081ULL, 0x8000000000008009ULL,
+        0x8aULL, 0x88ULL, 0x80008009ULL, 0x8000000aULL,
+        0x8000808bULL, 0x800000000000008bULL, 0x8000000000008089ULL, 0x8000000000008003ULL,
+        0x8000000000008002ULL, 0x8000000000000080ULL, 0x800aULL, 0x800000008000000aULL,
+        0x8000000080008081ULL, 0x8000000000008080ULL, 0x80000001ULL, 0x8000000080008008ULL};
+
+/*** Helper macros to unroll the permutation. ***/
+#define rol(x, s) (((x) << s) | ((x) >> (64 - s)))
+#define REPEAT6(e) e e e e e e
+#define REPEAT24(e) REPEAT6(e e e e)
+#define REPEAT5(e) e e e e e
+#define FOR5(v, s, e) \
+  v = 0;            \
+  REPEAT5(e; v += s;)
+
+/*** Keccak-f[1600] ***/
+static inline void keccakf(void* state) {
+    uint64_t* a = (uint64_t*)state;
+    uint64_t b[5] = {0};
+    uint64_t t = 0;
+    uint8_t x, y;
+
+    for (int i = 0; i < 24; i++) {
+        // Theta
+        FOR5(x, 1,
+                b[x] = 0;
+                FOR5(y, 5,
+                        b[x] ^= a[x + y]; ))
+        FOR5(x, 1,
+                FOR5(y, 5,
+                        a[y + x] ^= b[(x + 4) % 5] ^ rol(b[(x + 1) % 5], 1); ))
+        // Rho and pi
+        t = a[1];
+        x = 0;
+        REPEAT24(b[0] = a[pi[x]];
+                a[pi[x]] = rol(t, rho[x]);
+                t = b[0];
+                x++; )
+        // Chi
+        FOR5(y,
+                5,
+                FOR5(x, 1,
+                        b[x] = a[y + x];)
+                FOR5(x, 1,
+                a[y + x] = b[x] ^ ((~b[(x + 1) % 5]) & b[(x + 2) % 5]); ))
+        // Iota
+        a[0] ^= RC[i];
+    }
+}
+
+/******** The FIPS202-defined functions. ********/
+
+/*** Some helper macros. ***/
+
+#define _(S) do { S } while (0)
+#define FOR(i, ST, L, S) \
+  _(for (size_t i = 0; i < L; i += ST) { S; })
+#define mkapply_ds(NAME, S)                                          \
+  static inline void NAME(uint8_t* dst,                              \
+                          const uint8_t* src,                        \
+                          size_t len) {                              \
+    FOR(i, 1, len, S);                                               \
+  }
+#define mkapply_sd(NAME, S)                                          \
+  static inline void NAME(const uint8_t* src,                        \
+                          uint8_t* dst,                              \
+                          size_t len) {                              \
+    FOR(i, 1, len, S);                                               \
+  }
+
+mkapply_ds(xorin, dst[i] ^= src[i])  // xorin
+mkapply_sd(setout, dst[i] = src[i])  // setout
+
+#define P keccakf
+#define Plen 200
+
+// Fold P*F over the full blocks of an input.
+#define foldP(I, L, F) \
+  while (L >= rate) {  \
+    F(a, I, rate);     \
+    P(a);              \
+    I += rate;         \
+    L -= rate;         \
+  }
+
+/** The sponge-based hash construction. **/
+static inline int hash(uint8_t* out, size_t outlen,
+        const uint8_t* in, size_t inlen,
+        size_t rate, uint8_t delim) {
+    if ((out == NULL) || ((in == NULL) && inlen != 0) || (rate >= Plen)) {
+        return -1;
+    }
+    uint8_t a[Plen] = {0};
+    // Absorb input.
+    foldP(in, inlen, xorin);
+    // Xor in the DS and pad frame.
+    a[inlen] ^= delim;
+    a[rate - 1] ^= 0x80;
+    // Xor in the last block.
+    xorin(a, in, inlen);
+    // Apply P
+    P(a);
+    // Squeeze output.
+    foldP(out, outlen, setout);
+    setout(a, out, outlen);
+    memset(a, 0, 200);
+    return 0;
+}
+
+#define defsha3(bits)                                             \
+  int sha3_##bits(uint8_t* out, size_t outlen,                    \
+                  const uint8_t* in, size_t inlen) {              \
+    if (outlen > (bits/8)) {                                      \
+      return -1;                                                  \
+    }                                                             \
+    return hash(out, outlen, in, inlen, 200 - (bits / 4), 0x01);  \
+  }
+
+/*** FIPS202 SHA3 FOFs ***/
+defsha3(256)
+defsha3(512)
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/sha3.h

+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "compiler.h"
+#include <stdint.h>
+#include <stdlib.h>
+
+#define decsha3(bits) \
+  int sha3_##bits(uint8_t*, size_t, const uint8_t*, size_t);
+
+decsha3(256)
+decsha3(512)
+
+static inline void SHA3_256(uint8_t * const ret, uint8_t const *data, const size_t size) {
+    sha3_256(ret, 32, data, size);
+}
+
+static inline void SHA3_512(uint8_t * const ret, uint8_t const *data, const size_t size) {
+    sha3_512(ret, 64, data, size);
+}
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/sha3_cryptopp.cpp

+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/** @file sha3.cpp
+* @author Tim Hughes <tim@twistedfury.com>
+* @date 2015
+*/
+
+#include <stdint.h>
+#include <cryptopp/sha3.h>
+
+extern "C" {
+void SHA3_256(uint8_t *const ret, const uint8_t *data, size_t size) {
+  CryptoPP::SHA3_256().CalculateDigest(ret, data, size);
+}
+
+void SHA3_512(uint8_t *const ret, const uint8_t *data, size_t size) {
+  CryptoPP::SHA3_512().CalculateDigest(ret, data, size);
+}
+}
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/sha3_cryptopp.h

+#pragma once
+
+#include "compiler.h"
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void SHA3_256(uint8_t *const ret, const uint8_t *data, size_t size);
+void SHA3_512(uint8_t *const ret, const uint8_t *data, size_t size);
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/util.c

+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file util.c
+ * @author Tim Hughes <tim@twistedfury.com>
+ * @date 2015
+ */
+#include <stdarg.h>
+#include <stdio.h>
+#include "util.h"
+
+#ifdef _MSC_VER
+
+// foward declare without all of Windows.h
+__declspec(dllimport) void __stdcall OutputDebugStringA(const char* lpOutputString);
+
+void debugf(const char *str, ...)
+{
+	va_list args;
+    va_start(args, str);
+
+	char buf[1<<16];
+	_vsnprintf_s(buf, sizeof(buf), sizeof(buf), str, args);
+	buf[sizeof(buf)-1] = '\0';
+	OutputDebugStringA(buf);
+}
+
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/util.h

+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file util.h
+ * @author Tim Hughes <tim@twistedfury.com>
+ * @date 2015
+ */
+#pragma once
+#include <stdint.h>
+#include "compiler.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef _MSC_VER
+void debugf(const char *str, ...);
+#else
+#define debugf printf
+#endif
+
+static inline uint32_t min_u32(uint32_t a, uint32_t b)
+{
+	return a < b ? a : b;
+}
+
+static inline uint32_t clamp_u32(uint32_t x, uint32_t min_, uint32_t max_)
+{
+	return x < min_ ? min_ : (x > max_ ? max_ : x);
+}
+
+#ifdef __cplusplus
+}
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/node-ethash/binding.gyp

+{
+  "targets":
+    [{
+      "target_name": "ethash",
+        "sources": [
+            './ethash.cc',
+            '../libethash/ethash.h',
+            '../libethash/util.c',
+            '../libethash/util.h',
+            '../libethash/blum_blum_shub.h',
+            '../libethash/blum_blum_shub.c',
+            '../libethash/sha3.h',
+            '../libethash/sha3.c',
+            '../libethash/internal.h',
+            '../libethash/internal.c'
+          ],
+        "include_dirs": [
+          "../",
+          "<!(node -e \"require('nan')\")"
+        ],
+        "cflags": [
+        "-Wall",
+        "-Wno-maybe-uninitialized",
+        "-Wno-uninitialized",
+        "-Wno-unused-function",
+        "-Wextra"
+          ]
+    }]
+}

Godeps/_workspace/src/github.com/ethereum/ethash/node-ethash/package.json

+{
+  "name": "node-ethash",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "install": "node-gyp rebuild"
+  },
+  "author": "",
+  "license": "ISC",
+  "gypfile": true
+}

Godeps/_workspace/src/github.com/ethereum/ethash/node-ethash/readme.md

+# To Develop
+`npm install -g node-gyp`  
+`npm install .`  
+
+
+# To rebuild 
+`node-gyp rebuild`  
+
+
+# notes
+
+nan is good https://github.com/rvagg/nan

Godeps/_workspace/src/github.com/ethereum/ethash/test/CMakeLists.txt

+IF( NOT Boost_FOUND )
+    find_package(Boost COMPONENTS unit_test_framework)
+ENDIF()
+
+IF( Boost_FOUND )
+    include_directories( ${Boost_INCLUDE_DIR} )
+    include_directories(..)
+
+    link_directories ( ${Boost_LIBRARY_DIRS} )
+    file(GLOB HEADERS "*.h")
+    ADD_DEFINITIONS(-DBOOST_TEST_DYN_LINK)
+
+    if (NOT CRYPTOPP_FOUND)
+	    find_package (CryptoPP)
+    endif()
+
+    if (CRYPTOPP_FOUND)
+	    add_definitions(-DWITH_CRYPTOPP)
+    endif()
+
+    add_executable (Test test.cpp ${HEADERS})
+    target_link_libraries (Test ${Boost_UNIT_TEST_FRAMEWORK_LIBRARY} ${ETHHASH_LIBS})
+
+    if (CRYPTOPP_FOUND)
+	    TARGET_LINK_LIBRARIES(Test ${CRYPTOPP_LIBRARIES})
+    endif()
+
+    enable_testing ()
+    add_test(NAME ethash COMMAND Test)
+ENDIF()

Godeps/_workspace/src/github.com/ethereum/ethash/test/go/ethash_test.go

+package ethashTest
+
+import (
+	"bytes"
+	"crypto/rand"
+	"log"
+	"math/big"
+	"testing"
+
+	"github.com/ethereum/ethash"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/ethdb"
+)
+
+func TestEthash(t *testing.T) {
+	seedHash := make([]byte, 32)
+	_, err := rand.Read(seedHash)
+	if err != nil {
+		panic(err)
+	}
+
+	db, err := ethdb.NewMemDatabase()
+	if err != nil {
+		panic(err)
+	}
+
+	blockProcessor, err := core.NewCanonical(5, db)
+	if err != nil {
+		panic(err)
+	}
+
+	log.Println("Block Number: ", blockProcessor.ChainManager().CurrentBlock().Number())
+
+	e := ethash.New(blockProcessor.ChainManager())
+
+	miningHash := make([]byte, 32)
+	if _, err := rand.Read(miningHash); err != nil {
+		panic(err)
+	}
+	diff := big.NewInt(10000)
+	log.Println("difficulty", diff)
+
+	nonce := uint64(0)
+
+	ghash_full := e.FullHash(nonce, miningHash)
+	log.Printf("ethash full (on nonce): %x %x\n", ghash_full, nonce)
+
+	ghash_light := e.LightHash(nonce, miningHash)
+	log.Printf("ethash light (on nonce): %x %x\n", ghash_light, nonce)
+
+	if bytes.Compare(ghash_full, ghash_light) != 0 {
+		t.Errorf("full: %x, light: %x", ghash_full, ghash_light)
+	}
+}

core/block_processor.go

@@ -7,12 +7,12 @@ import (
 	"sync"
 	"time"
 
+	"github.com/ethereum/ethash"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/pow"
-	"github.com/ethereum/go-ethereum/pow/ezp"
 	"github.com/ethereum/go-ethereum/state"
 	"gopkg.in/fatih/set.v0"
 )
@@ -50,7 +50,7 @@ func NewBlockProcessor(db ethutil.Database, txpool *TxPool, chainManager *ChainM
 	sm := &BlockProcessor{
 		db:       db,
 		mem:      make(map[string]*big.Int),
-		Pow:      ezp.New(),
+		Pow:      ethash.New(chainManager),
 		bc:       chainManager,
 		eventMux: eventMux,
 		txpool:   txpool,
@@ -105,6 +105,9 @@ func (self *BlockProcessor) ApplyTransaction(coinbase *state.StateObject, stated
 
 	return receipt, txGas, err
 }
+func (self *BlockProcessor) ChainManager() *ChainManager {
+	return self.bc
+}
 
 func (self *BlockProcessor) ApplyTransactions(coinbase *state.StateObject, statedb *state.StateDB, block *types.Block, txs types.Transactions, transientProcess bool) (types.Receipts, types.Transactions, types.Transactions, types.Transactions, error) {
 	var (
@@ -256,6 +259,11 @@ func (sm *BlockProcessor) ValidateBlock(block, parent *types.Block) error {
 		return fmt.Errorf("GasLimit check failed for block %v", block.Header().GasLimit)
 	}
 
+	// There can be at most one uncle
+	if len(block.Uncles()) > 1 {
+		return ValidationError("Block can only contain one uncle (contained %v)", len(block.Uncles()))
+	}
+
 	if block.Time() < parent.Time() {
 		return ValidationError("Block timestamp not after prev block (%v - %v)", block.Header().Time, parent.Header().Time)
 	}

core/transaction_pool.go

@@ -117,8 +117,13 @@ func (self *TxPool) add(tx *types.Transaction) error {
 	} else {
 		to = "[NEW_CONTRACT]"
 	}
-
-	txplogger.Debugf("(t) %x => %s (%v) %x\n", tx.From()[:4], to, tx.Value, tx.Hash())
+	var from string
+	if len(tx.From()) > 0 {
+		from = ethutil.Bytes2Hex(tx.From()[:4])
+	} else {
+		return errors.New(fmt.Sprintf("FROM ADDRESS MUST BE POSITIVE (was %v)", tx.From()))
+	}
+	txplogger.Debugf("(t) %x => %s (%v) %x\n", from, to, tx.Value, tx.Hash())
 
 	// Notify the subscribers
 	go self.eventMux.Post(TxPreEvent{tx})

core/types/block.go

@@ -41,12 +41,29 @@ type Header struct {
 	Extra string
 	// Block Nonce for verification
 	Nonce ethutil.Bytes
+	// Mix digest for quick checking to prevent DOS
+	MixDigest ethutil.Bytes
+	// SeedHash used for light client verification
+	SeedHash ethutil.Bytes
 }
 
 func (self *Header) rlpData(withNonce bool) []interface{} {
-	fields := []interface{}{self.ParentHash, self.UncleHash, self.Coinbase, self.Root, self.TxHash, self.ReceiptHash, self.Bloom, self.Difficulty, self.Number, self.GasLimit, self.GasUsed, self.Time, self.Extra}
+	fields := []interface{}{
+		self.ParentHash,
+		self.UncleHash,
+		self.Coinbase,
+		self.Root,
+		self.TxHash,
+		self.ReceiptHash,
+		self.Bloom,
+		self.Difficulty,
+		self.Number,
+		self.GasLimit,
+		self.GasUsed,
+		self.Time,
+		self.Extra}
 	if withNonce {
-		fields = append(fields, self.Nonce)
+		fields = append(fields, self.Nonce, self.MixDigest, self.SeedHash)
 	}
 
 	return fields
@@ -176,6 +193,8 @@ func (self *Block) RlpDataForStorage() interface{} {
 // Header accessors (add as you need them)
 func (self *Block) Number() *big.Int          { return self.header.Number }
 func (self *Block) NumberU64() uint64         { return self.header.Number.Uint64() }
+func (self *Block) MixDigest() []byte         { return self.header.MixDigest }
+func (self *Block) SeedHash() []byte          { return self.header.SeedHash }
 func (self *Block) Nonce() []byte             { return self.header.Nonce }
 func (self *Block) Bloom() []byte             { return self.header.Bloom }
 func (self *Block) Coinbase() []byte          { return self.header.Coinbase }
@@ -200,7 +219,6 @@ func (self *Block) GetUncle(i int) *Header {
 
 // Implement pow.Block
 func (self *Block) Difficulty() *big.Int { return self.header.Difficulty }
-func (self *Block) N() []byte            { return self.header.Nonce }
 func (self *Block) HashNoNonce() []byte  { return self.header.HashNoNonce() }
 
 func (self *Block) Hash() []byte {