SPARC Features

The SPARC architecture has features that improve the performance of generated code:

• Register windows, a stack frame of integer registers on a CPU register stack, greatly improve the speed of subroutine call. A register window is divided into sections: Input, Local, and Output registers. When a subroutine call is made, the Output registers of the caller become the Input registers of the callee.
  • Parameter transmission is easy: just load a parameter into an Output register
  • No need to save and restore integer registers, since the Local and Output registers are in a new part of the stack.