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Design at the RTL level is typical practice in modern digital design. [ 1 ] Unlike in software compiler design, where the register-transfer level is an intermediate representation and at the lowest level, the RTL level is the usual input that circuit designers operate on.
In computer science, register transfer language (RTL) is a kind of intermediate representation (IR) that is very close to assembly language, such as that which is used in a compiler. It is used to describe data flow at the register-transfer level of an architecture . [ 1 ]
RTL is the earliest class of transistorized digital logic circuit; it was succeeded by diode–transistor logic (DTL) and transistor–transistor logic (TTL). RTL circuits were first constructed with discrete components , but in 1961 it became the first digital logic family to be produced as a monolithic integrated circuit .
The RTL describes the exact behavior of the digital circuits on the chip, as well as the interconnections to inputs and outputs. Physical circuit design: This step takes the RTL, and a library of available logic gates (standard cell library), and creates a chip design.
Almost any circuit representation in RTL or Behavioural Description is a multi-level representation. An early system that was used to design multilevel circuits was LSS from IBM. It used local transformations to simplify logic. Work on LSS and the Yorktown Silicon Compiler spurred rapid research progress in logic synthesis in the 1980s.
A formal equivalence check can be performed between any two representations of a design: RTL <> netlist, netlist <> netlist or RTL <> RTL, though the latter is rare compared to the first two. Typically, a formal equivalence checking tool will also indicate with great precision at which point there exists a difference between two representations.
The Pentium Pro's fetch and decode hardware fetches instructions and decodes them into series of micro-operations that are passed on to the execution unit, which schedules and executes the micro-operations, possibly doing so out-of-order. Complex instructions are implemented by microcode that consists of predefined sequences of micro-operations ...
RTL (C) Callee Return pointer in SI. IA-32: cdecl: Unix-like : RTL (C) Caller When returning struct/class, the calling code allocates space and passes a pointer to this space via a hidden parameter on the stack. The called function writes the return value to this address. Stack aligned on 16-byte boundary due to a bug. cdecl: Microsoft: RTL (C ...