diff options
Diffstat (limited to 'third-party/benchmark/src/cycleclock.h')
| -rw-r--r-- | third-party/benchmark/src/cycleclock.h | 40 |
1 files changed, 28 insertions, 12 deletions
diff --git a/third-party/benchmark/src/cycleclock.h b/third-party/benchmark/src/cycleclock.h index d65d32a39d3d..eff563e7fac2 100644 --- a/third-party/benchmark/src/cycleclock.h +++ b/third-party/benchmark/src/cycleclock.h @@ -36,7 +36,8 @@ // declarations of some other intrinsics, breaking compilation. // Therefore, we simply declare __rdtsc ourselves. See also // http://connect.microsoft.com/VisualStudio/feedback/details/262047 -#if defined(COMPILER_MSVC) && !defined(_M_IX86) && !defined(_M_ARM64) +#if defined(COMPILER_MSVC) && !defined(_M_IX86) && !defined(_M_ARM64) && \ + !defined(_M_ARM64EC) extern "C" uint64_t __rdtsc(); #pragma intrinsic(__rdtsc) #endif @@ -114,7 +115,7 @@ inline BENCHMARK_ALWAYS_INLINE int64_t Now() { // when I know it will work. Otherwise, I'll use __rdtsc and hope // the code is being compiled with a non-ancient compiler. _asm rdtsc -#elif defined(COMPILER_MSVC) && defined(_M_ARM64) +#elif defined(COMPILER_MSVC) && (defined(_M_ARM64) || defined(_M_ARM64EC)) // See // https://docs.microsoft.com/en-us/cpp/intrinsics/arm64-intrinsics // and https://reviews.llvm.org/D53115 int64_t virtual_timer_value; @@ -132,7 +133,7 @@ inline BENCHMARK_ALWAYS_INLINE int64_t Now() { // Native Client does not provide any API to access cycle counter. // Use clock_gettime(CLOCK_MONOTONIC, ...) instead of gettimeofday - // because is provides nanosecond resolution (which is noticable at + // because is provides nanosecond resolution (which is noticeable at // least for PNaCl modules running on x86 Mac & Linux). // Initialize to always return 0 if clock_gettime fails. struct timespec ts = {0, 0}; @@ -173,7 +174,7 @@ inline BENCHMARK_ALWAYS_INLINE int64_t Now() { struct timeval tv; gettimeofday(&tv, nullptr); return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec; -#elif defined(__loongarch__) +#elif defined(__loongarch__) || defined(__csky__) struct timeval tv; gettimeofday(&tv, nullptr); return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec; @@ -188,15 +189,16 @@ inline BENCHMARK_ALWAYS_INLINE int64_t Now() { #endif return tsc; #elif defined(__riscv) // RISC-V - // Use RDCYCLE (and RDCYCLEH on riscv32) + // Use RDTIME (and RDTIMEH on riscv32). + // RDCYCLE is a privileged instruction since Linux 6.6. #if __riscv_xlen == 32 uint32_t cycles_lo, cycles_hi0, cycles_hi1; // This asm also includes the PowerPC overflow handling strategy, as above. // Implemented in assembly because Clang insisted on branching. asm volatile( - "rdcycleh %0\n" - "rdcycle %1\n" - "rdcycleh %2\n" + "rdtimeh %0\n" + "rdtime %1\n" + "rdtimeh %2\n" "sub %0, %0, %2\n" "seqz %0, %0\n" "sub %0, zero, %0\n" @@ -205,17 +207,31 @@ inline BENCHMARK_ALWAYS_INLINE int64_t Now() { return (static_cast<uint64_t>(cycles_hi1) << 32) | cycles_lo; #else uint64_t cycles; - asm volatile("rdcycle %0" : "=r"(cycles)); + asm volatile("rdtime %0" : "=r"(cycles)); return cycles; #endif #elif defined(__e2k__) || defined(__elbrus__) struct timeval tv; gettimeofday(&tv, nullptr); return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec; +#elif defined(__hexagon__) + uint64_t pcycle; + asm volatile("%0 = C15:14" : "=r"(pcycle)); + return static_cast<double>(pcycle); +#elif defined(__alpha__) + // Alpha has a cycle counter, the PCC register, but it is an unsigned 32-bit + // integer and thus wraps every ~4s, making using it for tick counts + // unreliable beyond this time range. The real-time clock is low-precision, + // roughtly ~1ms, but it is the only option that can reasonable count + // indefinitely. + struct timeval tv; + gettimeofday(&tv, nullptr); + return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec; #else -// The soft failover to a generic implementation is automatic only for ARM. -// For other platforms the developer is expected to make an attempt to create -// a fast implementation and use generic version if nothing better is available. + // The soft failover to a generic implementation is automatic only for ARM. + // For other platforms the developer is expected to make an attempt to create + // a fast implementation and use generic version if nothing better is + // available. #error You need to define CycleTimer for your OS and CPU #endif } |