Merge pull request #630 from peastman/jit

JIT compilation for custom forces in CPU platform

libraries/asmjit/base/cpuinfo.h

+// [AsmJit]
+// Complete x86/x64 JIT and Remote Assembler for C++.
+//
+// [License]
+// Zlib - See LICENSE.md file in the package.
+
+// [Guard]
+#ifndef _ASMJIT_BASE_CPUINFO_H
+#define _ASMJIT_BASE_CPUINFO_H
+
+// [Dependencies - AsmJit]
+#include "../base/globals.h"
+
+// [Api-Begin]
+#include "../apibegin.h"
+
+namespace asmjit {
+
+//! \addtogroup asmjit_base_general
+//! \{
+
+// ============================================================================
+// [asmjit::kCpuVendor]
+// ============================================================================
+
+//! Cpu vendor ID.
+//!
+//! Vendor IDs are specific to AsmJit library. During the library initialization
+//! AsmJit checks host CPU and tries to identify the vendor based on the CPUID
+//! calls. Some manufacturers changed their vendor strings and AsmJit is aware
+//! of that - it checks multiple combinations and decides which vendor ID should
+//! be used.
+ASMJIT_ENUM(kCpuVendor) {
+  //! No/Unknown vendor.
+  kCpuVendorNone = 0,
+
+  //! Intel vendor.
+  kCpuVendorIntel = 1,
+  //! AMD vendor.
+  kCpuVendorAmd = 2,
+  //! VIA vendor.
+  kCpuVendorVia = 3
+};
+
+// ============================================================================
+// [asmjit::CpuInfo]
+// ============================================================================
+
+//! Base cpu information.
+struct CpuInfo {
+  ASMJIT_NO_COPY(CpuInfo)
+
+  //! \internal
+  enum {
+    kFeaturesPerUInt32 = static_cast<int>(sizeof(uint32_t)) * 8
+  };
+
+  // --------------------------------------------------------------------------
+  // [Construction / Destruction]
+  // --------------------------------------------------------------------------
+
+  ASMJIT_INLINE CpuInfo(uint32_t size = sizeof(CpuInfo)) : _size(size) {}
+
+  // --------------------------------------------------------------------------
+  // [Accessors]
+  // --------------------------------------------------------------------------
+
+  //! Get CPU vendor string.
+  ASMJIT_INLINE const char* getVendorString() const { return _vendorString; }
+  //! Get CPU brand string.
+  ASMJIT_INLINE const char* getBrandString() const { return _brandString; }
+
+  //! Get CPU vendor ID.
+  ASMJIT_INLINE uint32_t getVendorId() const { return _vendorId; }
+  //! Get CPU family ID.
+  ASMJIT_INLINE uint32_t getFamily() const { return _family; }
+  //! Get CPU model ID.
+  ASMJIT_INLINE uint32_t getModel() const { return _model; }
+  //! Get CPU stepping.
+  ASMJIT_INLINE uint32_t getStepping() const { return _stepping; }
+
+  //! Get number of hardware threads available.
+  ASMJIT_INLINE uint32_t getHwThreadsCount() const { return _hwThreadsCount; }
+
+  //! Get whether CPU has a `feature`.
+  ASMJIT_INLINE bool hasFeature(uint32_t feature) const {
+    ASMJIT_ASSERT(feature < sizeof(_features) * 8);
+
+    return static_cast<bool>(
+      (_features[feature / kFeaturesPerUInt32] >> (feature % kFeaturesPerUInt32)) & 0x1);
+  }
+
+  //! Add a CPU `feature`.
+  ASMJIT_INLINE CpuInfo& addFeature(uint32_t feature) {
+    ASMJIT_ASSERT(feature < sizeof(_features) * 8);
+
+    _features[feature / kFeaturesPerUInt32] |= (1U << (feature % kFeaturesPerUInt32));
+    return *this;
+  }
+
+  // --------------------------------------------------------------------------
+  // [Statics]
+  // --------------------------------------------------------------------------
+
+  //! Detect the number of hardware threads.
+  static ASMJIT_API uint32_t detectHwThreadsCount();
+
+  //! Get host cpu.
+  static ASMJIT_API const CpuInfo* getHost();
+
+  // --------------------------------------------------------------------------
+  // [Members]
+  // --------------------------------------------------------------------------
+
+  //! Size of the structure in bytes.
+  uint32_t _size;
+
+  //! Cpu short vendor string.
+  char _vendorString[16];
+  //! Cpu long vendor string (brand).
+  char _brandString[64];
+
+  //! Cpu vendor id, see `asmjit::kCpuVendor`.
+  uint32_t _vendorId;
+  //! Cpu family ID.
+  uint32_t _family;
+  //! Cpu model ID.
+  uint32_t _model;
+  //! Cpu stepping.
+  uint32_t _stepping;
+
+  //! Number of hardware threads.
+  uint32_t _hwThreadsCount;
+
+  //! Cpu features bitfield.
+  uint32_t _features[4];
+};
+
+//! \}
+
+} // asmjit namespace
+
+// [Api-End]
+#include "../apiend.h"
+
+// [Guard]
+#endif // _ASMJIT_BASE_CPUINFO_H