Address Truncation Bug During Memory Access

[youzi27]

Bug Description

In the Nutshell, during memory access operations (e.g., sw, lw), an incorrect address truncation occurs, causing the higher-order bits (greater than 40 bits) to be lost.

Steps to Reproduce

1. Set up the Nutshell simulation environment.
2. Configure a memory access operation with an address larger than 40 bits (e.g., 0x0100_0000_0000).
3. Execute the memory access operation in the simulation.
4. Observe the effective address being truncated to 40 bits.

Screenshots