)GY STORAGE STATEROOMS (4) PRESSURE FLOOR REPAIR BAY/SPARES STORAGE AREA IN LOWER IO-M j OF SPINE -_ '_'IO-M MARS ! LANDING EXPLORATION I CONFIGURATION L (8-MAN) - FOR SIZE REF POWERED ___ FLIGHT STATION / I _ s_ (Unclassified title) __ NUCLEAR PULSE SPACE VEHICLE STUDY GA-5009, Vol. III This document describes the RISC-V Bitmanip extensions (see Chapter 29). This section describes the RV64I base. 2.1. Programmers' Model for Base Counters and Timers 0xC00 Read-only cycle Cycle counter for RDCYCLE instruction. Timer for RDTIME instruction. Instructions-retired counter for RDCYCLE instruction. Timer for RDTIME instruction. 0xC02 Read-only instret Instructions-retired counter for RDCYCLE instruction. Timer for RDTIME instruction. Instructions-retired counter for RDCYCLE instruction. 0xC01 Read-only time Timer for RDTIME instruction. Instructions-retired counter for RDCYCLE instruction. 0xC01 Read-only time Timer for RDTIME instruction. Instructions-retired counter for RDCYCLE instruction. Timer for RDTIME instruction. Instructions-retired counter for RDINSTRET instruction. Performance-monitoring counter. Upper 32 bits wide, and
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