Add CycleTimer implementation for M68K architecture (#1050)

As per discussions in here [1], LLVM is going to get backend support on Motorola 68000 series CPUs (a.k.a M68K or M680x0). So it's necessary to add CycleTimer implementation here, which is simply using `gettimeofday` same as MIPS. This fixes #1049 [1] https://reviews.llvm.org/D88389

Add CycleTimer implementation for M68K architecture (#1050)
ffe1342e · Min-Yih Hsu · GitHub · 2d9bfe1e · ffe1342e · ffe1342e
Unverified Commit ffe1342e authored Sep 28, 2020 by Min-Yih Hsu Committed by GitHub Sep 29, 2020
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CONTRIBUTORS CONTRIBUTORS +1 -0

cycleclock.h src/cycleclock.h +1 -1

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--- a/AUTHORS
+++ b/AUTHORS
@@ -55,3 +55,4 @@ Stripe, Inc.
 Yixuan Qiu <yixuanq@gmail.com>
 Yusuke Suzuki <utatane.tea@gmail.com>
 Zbigniew Skowron <zbychs@gmail.com>
+Min-Yih Hsu <yihshyng223@gmail.com>
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -77,3 +77,4 @@ Tom Madams <tom.ej.madams@gmail.com> <tmadams@google.com>
 Yixuan Qiu <yixuanq@gmail.com>
 Yusuke Suzuki <utatane.tea@gmail.com>
 Zbigniew Skowron <zbychs@gmail.com>
+Min-Yih Hsu <yihshyng223@gmail.com>
--- a/src/cycleclock.h
+++ b/src/cycleclock.h
@@ -161,7 +161,7 @@ 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(__mips__)
+#elif defined(__mips__) || defined(__m68k__)
  // mips apparently only allows rdtsc for superusers, so we fall
  // back to gettimeofday.  It's possible clock_gettime would be better.
  struct timeval tv;