diff options
Diffstat (limited to 'abseil-cpp/absl/base/internal/unscaledcycleclock.cc')
-rw-r--r-- | abseil-cpp/absl/base/internal/unscaledcycleclock.cc | 38 |
1 files changed, 25 insertions, 13 deletions
diff --git a/abseil-cpp/absl/base/internal/unscaledcycleclock.cc b/abseil-cpp/absl/base/internal/unscaledcycleclock.cc index f1e7bbe..05e0e7b 100644 --- a/abseil-cpp/absl/base/internal/unscaledcycleclock.cc +++ b/abseil-cpp/absl/base/internal/unscaledcycleclock.cc @@ -24,8 +24,13 @@ #ifdef __GLIBC__ #include <sys/platform/ppc.h> #elif defined(__FreeBSD__) -#include <sys/sysctl.h> +// clang-format off +// This order does actually matter =(. #include <sys/types.h> +#include <sys/sysctl.h> +// clang-format on + +#include "absl/base/call_once.h" #endif #endif @@ -49,12 +54,6 @@ double UnscaledCycleClock::Frequency() { #elif defined(__x86_64__) -int64_t UnscaledCycleClock::Now() { - uint64_t low, high; - __asm__ volatile("rdtsc" : "=a"(low), "=d"(high)); - return (high << 32) | low; -} - double UnscaledCycleClock::Frequency() { return base_internal::NominalCPUFrequency(); } @@ -72,13 +71,12 @@ int64_t UnscaledCycleClock::Now() { #else int32_t tbu, tbl, tmp; asm volatile( - "0:\n" "mftbu %[hi32]\n" "mftb %[lo32]\n" "mftbu %[tmp]\n" "cmpw %[tmp],%[hi32]\n" - "bne 0b\n" - : [ hi32 ] "=r"(tbu), [ lo32 ] "=r"(tbl), [ tmp ] "=r"(tmp)); + "bne $-16\n" // Retry on failure. + : [hi32] "=r"(tbu), [lo32] "=r"(tbl), [tmp] "=r"(tmp)); return (static_cast<int64_t>(tbu) << 32) | tbl; #endif #endif @@ -87,6 +85,10 @@ int64_t UnscaledCycleClock::Now() { double UnscaledCycleClock::Frequency() { #ifdef __GLIBC__ return __ppc_get_timebase_freq(); +#elif defined(_AIX) + // This is the same constant value as returned by + // __ppc_get_timebase_freq(). + return static_cast<double>(512000000); #elif defined(__FreeBSD__) static once_flag init_timebase_frequency_once; static double timebase_frequency = 0.0; @@ -119,13 +121,23 @@ double UnscaledCycleClock::Frequency() { return aarch64_timer_frequency; } +#elif defined(__riscv) + +int64_t UnscaledCycleClock::Now() { + int64_t virtual_timer_value; + asm volatile("rdcycle %0" : "=r"(virtual_timer_value)); + return virtual_timer_value; +} + +double UnscaledCycleClock::Frequency() { + return base_internal::NominalCPUFrequency(); +} + #elif defined(_M_IX86) || defined(_M_X64) #pragma intrinsic(__rdtsc) -int64_t UnscaledCycleClock::Now() { - return __rdtsc(); -} +int64_t UnscaledCycleClock::Now() { return __rdtsc(); } double UnscaledCycleClock::Frequency() { return base_internal::NominalCPUFrequency(); |