Differential D21430 Diff 61409 head/devel/abseil/files/patch-absl_base_internal_unscaledcycleclock.cc

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				--- absl/base/internal/unscaledcycleclock.cc.orig 2019-07-24 12:47:23 UTC
				+++ absl/base/internal/unscaledcycleclock.cc
				@@ -20,10 +20,15 @@
				#include <intrin.h>
				#endif

				-#if defined(__powerpc__) \|\| defined(__ppc__)
				+#if (defined(__powerpc__) \|\| defined(__ppc__)) && !defined(__FreeBSD__)
				#include <sys/platform/ppc.h>
				#endif

				+#ifdef __FreeBSD__
				+#include <sys/types.h>
				+#include <sys/sysctl.h>
				+#endif
				+
				#include "absl/base/internal/sysinfo.h"

				namespace absl {
				@@ -56,11 +61,34 @@ double UnscaledCycleClock::Frequency() {
				#elif defined(__powerpc__) \|\| defined(__ppc__)

				int64_t UnscaledCycleClock::Now() {
				+#ifndef __FreeBSD__
				return __ppc_get_timebase();
				+#else
				+ union { long long complete; unsigned int part[2]; } ticks;
				+ unsigned int tmp;
				+ asm volatile(
				+ "0:\n"
				+ "mftbu %[hi32]\n"
				+ "mftb %[lo32]\n"
				+ "mftbu %[tmp]\n"
				+ "cmpw %[tmp],%[hi32]\n"
				+ "bne 0b\n"
				+ : [hi32] "=r"(ticks.part[0]), [lo32] "=r"(ticks.part[1]),
				+ [tmp] "=r"(tmp)
				+ );
				+ return ticks.complete;
				+#endif
				}

				double UnscaledCycleClock::Frequency() {
				+#ifndef __FreeBSD__
				return __ppc_get_timebase_freq();
				+#else
				+ long timebaseFrequency = 0;
				+ size_t length = sizeof(timebaseFrequency);
				+ sysctlbyname("kern.timecounter.tc.timebase.frequency", &timebaseFrequency, &length, NULL, 0);
				+ return timebaseFrequency;
				+#endif
				}

				#elif defined(__aarch64__)