Initial overlay of HQEMU 2.5.2 changes onto underlying 2.5.1 QEMU GIT tree2.5.1_overlay

1 files changed, 38 insertions, 0 deletions

diff --git a/llvm/include/pmu/x86/x86-events.h b/llvm/include/pmu/x86/x86-events.h
new file mode 100644
index 0000000..c6fdb95
--- /dev/null
+++ b/llvm/include/pmu/x86/x86-events.h
@@ -0,0 +1,38 @@
+/*
+ *  (C) 2018 by Computer System Laboratory, IIS, Academia Sinica, Taiwan.
+ *      See COPYRIGHT in top-level directory.
+ */
+
+#ifndef __X86_EVENTS_H
+#define __X86_EVENTS_H
+
+#include <vector>
+#include "pmu/pmu.h"
+
+namespace pmu {
+
+class PMUEvent;
+
+#if defined(__i386__)
+/*
+ * Some non-Intel clones support out of order store. wmb() ceases to be a
+ * nop for these.
+ */
+#define pmu_mb()    asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
+#define pmu_rmb()   asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
+#define pmu_wmb()   asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
+#elif defined(__x86_64__)
+#define pmu_mb()    asm volatile("mfence" ::: "memory")
+#define pmu_rmb()   asm volatile("lfence" ::: "memory")
+#define pmu_wmb()   asm volatile("sfence" ::: "memory")
+#endif 
+
+int X86Init(void);
+
+} /* namespace pmu */
+
+#endif /* __X86_EVENTS_H */
+
+/*
+ * vim: ts=8 sts=4 sw=4 expandtab
+ */