compat flags explanation

1 files changed, 16 insertions, 2 deletions

diff --git a/pu2/pu2.c b/pu2/pu2.c
index 076261c..85c28f4 100644
--- a/pu2/pu2.c
+++ b/pu2/pu2.c
@@ -647,12 +647,20 @@ unsigned long long rdtsc(void) {
 #endif
 }
 
+#ifndef PU2_BAD_CLOCK
 clock_t ntime() {
     struct timespec t;
     clock_gettime(CLOCK_MONOTONIC_RAW, &t);
 
     return t.tv_nsec + t.tv_sec * 1e9;
 }
+#else
+clock_t ntime() {
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+    return tv.tv_sec * 1000000000 + tv.tv_usec * 1000;
+}
+#endif
 
 // bench: measure using clock()
 double bench_cycle(int instr) {
@@ -729,8 +737,14 @@ sleep_nano(int nanoseconds) {
     }
 }
 
-[[clang::always_inline]] sleep_micro(int microseconds) { sleep_nano(microseconds * 1e3); }
-[[clang::always_inline]] sleep_milli(int milliseconds) { sleep_nano(milliseconds * 1e6); }
+#ifdef PU2_OLD_CLANG
+    #define inline() __attribute__((always_inline))
+#else
+    #define inline() [[clang::always_inline]]
+#endif
+
+inline() sleep_micro(int microseconds) { sleep_nano(microseconds * 1e3); }
+inline() sleep_milli(int milliseconds) { sleep_nano(milliseconds * 1e6); }
 
 // benchmark: run target for all opcodes and print summary
 benchmark(double (*target)(int), const char *mode_label) {