From 50cc77a5ad212ea9c0283c6606d0057b806d2c12 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@parisc.parisc-linux.org>
Date: Fri, 20 Dec 2024 21:42:05 +0000
Subject: [PATCH] iprovide cycle clock counter for hppa


diff --git a/third-party/benchmark/src/cycleclock.h b/third-party/benchmark/src/cycleclock.h
index d4f1330b671d..5847900a9b7d 100644
--- a/third-party/benchmark/src/cycleclock.h
+++ b/third-party/benchmark/src/cycleclock.h
@@ -228,6 +228,16 @@ 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(__hppa__)
+  // HP PARISC provides a user-readable clock counter (cr16), but
+  // it's not syncronized across CPUs and only 32-bit wide when built
+  // as 32-bit binary.
+  // Use clock_gettime(CLOCK_MONOTONIC, ...) instead of gettimeofday
+  // because is provides nanosecond resolution.
+  // Initialize to always return 0 if clock_gettime fails.
+  struct timespec ts = {0, 0};
+  clock_gettime(CLOCK_MONOTONIC, &ts);
+  return static_cast<int64_t>(ts.tv_sec) * 1000000000 + ts.tv_nsec;
 #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