From 89c032a9b4011385c0b504ea61e5df0db71f0ff5 Mon Sep 17 00:00:00 2001
|
From: Khem Raj <raj.khem@gmail.com>
|
Date: Wed, 16 Jun 2021 19:06:02 -0700
|
Subject: [PATCH] range_tree: Implement toku_time_now for rv32/rv64 in asm
|
|
Upstream-Status: Pending
|
Signed-off-by: Khem Raj <raj.khem@gmail.com>
|
---
|
.../range_tree/lib/portability/toku_time.h | 19 +++++++++++++++++++
|
1 file changed, 19 insertions(+)
|
|
diff --git a/utilities/transactions/lock/range/range_tree/lib/portability/toku_time.h b/utilities/transactions/lock/range/range_tree/lib/portability/toku_time.h
|
index 4425a4a2e..4ac964f85 100644
|
--- a/utilities/transactions/lock/range/range_tree/lib/portability/toku_time.h
|
+++ b/utilities/transactions/lock/range/range_tree/lib/portability/toku_time.h
|
@@ -133,6 +133,25 @@ static inline tokutime_t toku_time_now(void) {
|
return result;
|
#elif defined(__powerpc__)
|
return __ppc_get_timebase();
|
+#elif defined(__riscv) // RISC-V
|
+#if __riscv_xlen == 32
|
+ uint32_t lo, hi0, hi1;
|
+ __asm __volatile__(
|
+ "rdcycleh %0\n"
|
+ "rdcycle %1\n"
|
+ "rdcycleh %2\n"
|
+ "sub %0, %0, %2\n"
|
+ "seqz %0, %0\n"
|
+ "sub %0, zero, %0\n"
|
+ "and %1, %1, %0\n"
|
+ : "=r"(hi0), "=r"(lo), "=r"(hi1));
|
+ return ((uint64_t)hi1 << 32) | lo;
|
+#else
|
+ uint64_t result;
|
+ __asm __volatile__("rdcycle %0" : "=r"(result));
|
+ return result;
|
+#endif
|
+
|
#else
|
#error No timer implementation for this platform
|
#endif
|
--
|
2.32.0
|
