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>
#elif defined(JPH_CPU_E2K)
    #include <x86intrin.h>
#elif defined(JPH_CPU_LOONGARCH)
    #include <larchintrin.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_E2K)
    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_LOONGARCH)
    #if JPH_CPU_ADDRESS_BITS == 64
        __drdtime_t t = __rdtime_d();
        return t.dvalue;
    #else
        __rdtime_t h = __rdtimeh_w();
        __rdtime_t l = __rdtimel_w();
        return ((uint64)h.value << 32) + l.value;
    #endif
#elif defined(JPH_CPU_ARM) || defined(JPH_CPU_RISCV) || defined(JPH_CPU_WASM) || defined(JPH_CPU_PPC)
    return 0; // Not supported
#else
    #error Undefined
#endif
}
 
#endif // JPH_PLATFORM_WINDOWS_UWP || (JPH_PLATFORM_WINDOWS && JPH_CPU_ARM)
 
JPH_NAMESPACE_END