registersFromdest0

registersFromdest0 is a designation used in certain computer architectures and intermediate representations to denote a retrieval operation that gathers the registers associated with the first destination group of an instruction path, often labeled dest0. It is commonly employed in simulations, compilers, and assembler backends to model how data is routed to the primary destination.

Its exact meaning varies by design, but in general registersFromdest0 returns either the current values of the register bank assigned to destination 0, or the set of physical or virtual registers that participate in computing that destination. In single-destination ISAs it may return a single register; in vector or multi-destination schemes it can return a register bundle or a list of registers from the dest0 bank.

Usage examples: In an IR, a node representing an instruction with multiple destinations can be annotated with registersFromdest0 to expose the first destination’s operands to subsequent optimization passes. In a simulator, calling registersFromdest0(instr) yields the values that would be written to dest0 after execution.

Related concepts include register banks, operand fetch, destination registers, and instruction selection. The implementation is architecture-specific, and in some tools the function is read-only, while in others it participates in data-path synthesis.

See also

- register bank

- destination register

- instruction set architecture

- vector register file