Andrew Geissler | 6972109 | 2021-07-23 12:57:00 -0400 | [diff] [blame] | 1 | From 89c032a9b4011385c0b504ea61e5df0db71f0ff5 Mon Sep 17 00:00:00 2001 |
| 2 | From: Khem Raj <raj.khem@gmail.com> |
| 3 | Date: Wed, 16 Jun 2021 19:06:02 -0700 |
| 4 | Subject: [PATCH] range_tree: Implement toku_time_now for rv32/rv64 in asm |
| 5 | |
| 6 | Upstream-Status: Pending |
| 7 | Signed-off-by: Khem Raj <raj.khem@gmail.com> |
| 8 | --- |
| 9 | .../range_tree/lib/portability/toku_time.h | 19 +++++++++++++++++++ |
| 10 | 1 file changed, 19 insertions(+) |
| 11 | |
| 12 | 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 |
| 13 | index 4425a4a2e..4ac964f85 100644 |
| 14 | --- a/utilities/transactions/lock/range/range_tree/lib/portability/toku_time.h |
| 15 | +++ b/utilities/transactions/lock/range/range_tree/lib/portability/toku_time.h |
| 16 | @@ -133,6 +133,25 @@ static inline tokutime_t toku_time_now(void) { |
| 17 | return result; |
| 18 | #elif defined(__powerpc__) |
| 19 | return __ppc_get_timebase(); |
| 20 | +#elif defined(__riscv) // RISC-V |
| 21 | +#if __riscv_xlen == 32 |
| 22 | + uint32_t lo, hi0, hi1; |
| 23 | + __asm __volatile__( |
| 24 | + "rdcycleh %0\n" |
| 25 | + "rdcycle %1\n" |
| 26 | + "rdcycleh %2\n" |
| 27 | + "sub %0, %0, %2\n" |
| 28 | + "seqz %0, %0\n" |
| 29 | + "sub %0, zero, %0\n" |
| 30 | + "and %1, %1, %0\n" |
| 31 | + : "=r"(hi0), "=r"(lo), "=r"(hi1)); |
| 32 | + return ((uint64_t)hi1 << 32) | lo; |
| 33 | +#else |
| 34 | + uint64_t result; |
| 35 | + __asm __volatile__("rdcycle %0" : "=r"(result)); |
| 36 | + return result; |
| 37 | +#endif |
| 38 | + |
| 39 | #else |
| 40 | #error No timer implementation for this platform |
| 41 | #endif |
| 42 | -- |
| 43 | 2.32.0 |
| 44 | |