TickCounter.h

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// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
// SPDX-License-Identifier: MIT
 
#pragma once
 
// Include for __rdtsc
#if defined(JPH_PLATFORM_WINDOWS)
    #include <intrin.h> 
#elif defined(JPH_CPU_X86) && defined(JPH_COMPILER_GCC)
    #include <x86intrin.h>
#endif
 
JPH_NAMESPACE_BEGIN
 
#if defined(JPH_PLATFORM_WINDOWS_UWP) || (defined(JPH_PLATFORM_WINDOWS) && defined(JPH_CPU_ARM))
 
uint64 GetProcessorTickCount(); // Not inline to avoid having to include Windows.h
 
#else
 
JPH_INLINE uint64 GetProcessorTickCount()
{
#if defined(JPH_PLATFORM_BLUE)
    return JPH_PLATFORM_BLUE_GET_TICKS();
#elif defined(JPH_CPU_X86)
    return __rdtsc();
#elif defined(JPH_CPU_ARM) && defined(JPH_USE_NEON)
    uint64 val;
    asm volatile("mrs %0, cntvct_el0" : "=r" (val));
    return val;
#elif defined(JPH_CPU_ARM)
    return 0; // Not supported
#elif defined(JPH_CPU_WASM)
    return 0; // Not supported
#else
    #error Undefined
#endif
}
 
#endif // JPH_PLATFORM_WINDOWS_UWP || (JPH_PLATFORM_WINDOWS && JPH_CPU_ARM)
 
uint64 GetProcessorTicksPerSecond();
 
JPH_NAMESPACE_END