Move CPU information classes to new location.

src/backend/cpu/platform/BasicCpuInfo.cpp

@@ -0,0 +1,160 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
+ * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <support@xmrig.com>
+ *
+ *   This program 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.
+ *
+ *   This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <thread>
+
+
+#ifdef _MSC_VER
+#   include <intrin.h>
+#else
+#   include <cpuid.h>
+#endif
+
+#ifndef bit_AES
+#   define bit_AES (1 << 25)
+#endif
+
+#ifndef bit_OSXSAVE
+#   define bit_OSXSAVE (1 << 27)
+#endif
+
+#ifndef bit_AVX2
+#   define bit_AVX2 (1 << 5)
+#endif
+
+
+#include "backend/cpu/platform/BasicCpuInfo.h"
+#include "crypto/common/Assembly.h"
+
+
+#define VENDOR_ID                  (0)
+#define PROCESSOR_INFO             (1)
+#define CACHE_TLB_DESCRIPTOR       (2)
+#define EXTENDED_FEATURES          (7)
+#define PROCESSOR_BRAND_STRING_1   (0x80000002)
+#define PROCESSOR_BRAND_STRING_2   (0x80000003)
+#define PROCESSOR_BRAND_STRING_3   (0x80000004)
+
+#define EAX_Reg  (0)
+#define EBX_Reg  (1)
+#define ECX_Reg  (2)
+#define EDX_Reg  (3)
+
+
+#ifdef _MSC_VER
+static inline void cpuid(int level, int output[4]) {
+    __cpuid(output, level);
+}
+#else
+static inline void cpuid(int level, int output[4]) {
+    int a, b, c, d;
+    __cpuid_count(level, 0, a, b, c, d);
+
+    output[0] = a;
+    output[1] = b;
+    output[2] = c;
+    output[3] = d;
+}
+#endif
+
+
+static inline void cpu_brand_string(char* s) {
+    int32_t cpu_info[4] = { 0 };
+    cpuid(VENDOR_ID, cpu_info);
+
+    if (cpu_info[EAX_Reg] >= 4) {
+        for (int i = 0; i < 4; i++) {
+            cpuid(0x80000002 + i, cpu_info);
+            memcpy(s, cpu_info, sizeof(cpu_info));
+            s += 16;
+        }
+    }
+}
+
+
+static inline bool has_aes_ni()
+{
+    int32_t cpu_info[4] = { 0 };
+    cpuid(PROCESSOR_INFO, cpu_info);
+
+    return (cpu_info[ECX_Reg] & bit_AES) != 0;
+}
+
+
+static inline bool has_avx2()
+{
+    int32_t cpu_info[4] = { 0 };
+    cpuid(EXTENDED_FEATURES, cpu_info);
+
+    return (cpu_info[EBX_Reg] & bit_AVX2) != 0;
+}
+
+
+static inline bool has_ossave()
+{
+    int32_t cpu_info[4] = { 0 };
+    cpuid(PROCESSOR_INFO, cpu_info);
+
+    return (cpu_info[ECX_Reg] & bit_OSXSAVE) != 0;
+}
+
+
+xmrig::BasicCpuInfo::BasicCpuInfo() :
+    m_assembly(Assembly::NONE),
+    m_aes(has_aes_ni()),
+    m_avx2(has_avx2() && has_ossave()),
+    m_brand(),
+    m_threads(std::thread::hardware_concurrency())
+{
+    cpu_brand_string(m_brand);
+
+#   ifdef XMRIG_FEATURE_ASM
+    if (hasAES()) {
+        char vendor[13] = { 0 };
+        int32_t data[4] = { 0 };
+
+        cpuid(0, data);
+
+        memcpy(vendor + 0, &data[1], 4);
+        memcpy(vendor + 4, &data[3], 4);
+        memcpy(vendor + 8, &data[2], 4);
+
+        if (memcmp(vendor, "GenuineIntel", 12) == 0) {
+            m_assembly = Assembly::INTEL;
+        }
+        else if (memcmp(vendor, "AuthenticAMD", 12) == 0) {
+            m_assembly = Assembly::RYZEN;
+        }
+    }
+#   endif
+}
+
+
+size_t xmrig::BasicCpuInfo::optimalThreadsCount(size_t memSize, int maxCpuUsage) const
+{
+    const size_t count = threads() / 2;
+
+    return count < 1 ? 1 : count;
+}