diff options
| -rw-r--r-- | isa/rv64mi/timer.S | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/isa/rv64mi/timer.S b/isa/rv64mi/timer.S index f3350fc..b7cc633 100644 --- a/isa/rv64mi/timer.S +++ b/isa/rv64mi/timer.S @@ -39,9 +39,14 @@ RVTEST_CODE_BEGIN add s4, s4, 1 bltu s8, s9, 1b - # make sure the LFSR was computed correctly + # compute iteration count % 1023 without using REMU li s1, 1023 - remu s4, s4, s1 + bltu s4, s1, 2f +1:sub s4, s4, s1 + bgeu s4, s1, 1b +2: + + # make sure the LFSR was computed correctly la s1, lfsr sll s4, s4, 2 add s1, s1, s4 |