Techniques are disclosed relating to
graphics processor data caches. In some embodiments,
datapath executes instructions that operate on input operands from architectural registers.
Data cache circuitry caches architectural
register data for the
datapath circuitry. Scoreboard circuitry tracks, for a given architectural register: map information that indicates whether the architectural register is mapped to an entry of the
data cache circuitry and a pointer to the entry of the
data cache circuitry. Tiered scoreboard circuitry and data storage circuitry may be implemented (e.g., to provide fast scoreboard access for active threads and to give a landing spot for long-latency
data retrieval operations). Various disclosed techniques may improve cache performance, reduce
power consumption, reduce area, or some combination thereof.