Method and apparatus for addressing extended registers on a proc

Details Method and apparatus for addressing extended registers on a proc Method and apparatus for addressing extended registers on a proc

1996-06-14

1999-01-05

Voeltz, Emanuel Todd

G06F 940

Patent

active

058571035

ABSTRACT:
In its various embodiments, the present invention provides a method and apparatus for creating a target executable program from the source code of a target computer program for execution on a target processor. The target processor provided by the method and apparatus has a first set of registers and a second set of registers. Generally, the target processor is capable of executing a first set of instructions which only address the first set of registers. The method and apparatus provides a second set of instruction for the target processor which include a subset of frequently executed instructions within the first set of instructions. These second set of instructions are novel because they able to address both the first set of registers and the second set of registers. A compiler is provided and used for compiling the source code into a number of target executable instructions and allocating the registers on the target processor. The registers within the second set of registers are only allocated to those target executable instructions in the second set of instructions. According to principles of the present invention, the more frequently executed instructions are able to address a register in the second set of registers located on the target processor.

REFERENCES:
patent: 5428793 (1995-06-01), Odnert et al.
patent: 5560013 (1996-09-01), Scalzi et al.
patent: 5613121 (1997-03-01), Blainey
patent: 5724565 (1998-03-01), Dubey et al.
ACM Translation on Programming Languages & Systems, vol. 12, No. 4, Oct. 1990, New York, p. 501536, Fred C. Chow et al., "The Priority-Based Coloring Approach to Register Allocation".
Computer Languages, vol. 6, 1981, pp. 47-57, G.J. Chaitin et al., "Register Allocation Via Coloring".

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