diff options
Diffstat (limited to 'src/counters.tex')
| -rw-r--r-- | src/counters.tex | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/counters.tex b/src/counters.tex index ce0f02b..545804b 100644 --- a/src/counters.tex +++ b/src/counters.tex @@ -63,7 +63,7 @@ to read these CSRs. \end{commentary} For base ISAs with XLEN=32, the Zicntr extension enables the three -64-bit read-only user-level counters to be accessed in 32-bit pieces. +64-bit read-only counters to be accessed in 32-bit pieces. The RDCYCLE, RDTIME, and RDINSTRET pseudoinstructions provide the lower 32 bits, and the RDCYCLEH, RDTIMEH, and RDINSTRETH pseudoinstructions provide the upper 32 bits of the respective counters. @@ -165,7 +165,7 @@ wide variety of possible implementation platforms. The maximum error bound should be set based on the requirements of the platform. \end{commentary} -The real-time clocks of all harts in a single user application +The real-time clocks of all harts must be synchronized to within one tick of the real-time clock. \begin{commentary} |