Method for carrying out a boolean operation between any two bits of any two registers

Claim 1

A method for performing logic operations between a first and a second bit, selected respectively from the bits stored in any two distinct registers belonging to a register file or to any other data storing physical device of a microprocessor or of internal and/or external peripherals associated with said microprocessor, characterized by comprising at least one of the following steps or combination thereof: a) selecting a first bit (j) in a first source register (r s ) and a second bit (i) in a second destination register (r d ); placing said first bit in a logic XOR with said second bit and writing the resulting bit into the position occupied by said second bit in said second destination register, without altering the other bits present in said destination register; b) selecting a first bit (j) in a first source register (r s ); generating the complementary bit of said first bit; placing said complementary bit of said first bit in a logic XOR with a second bit (i) selected from the bits stored in a second destination register (r d ) and writing the resulting bit in the position occupied by said second bit in said second destination register, without altering the other bits stored in said destination register; c) selecting a first bit (j) in a first source register (r s ) and a second bit (i) in a second destination register (r d ), placing said first bit in a logic AND with said second bit and writing the resulting bit in the position occupied by said second bit in said second destination register, without altering the other bits stored in said destination register; d) selecting a first bit (j) in a first source register (r s ) and a second bit (i) in a second destination register (r d ), generating a complementary bit of said first bit and placing said complementary bit in a logic AND with said second bit and writing the resulting bit in the position occupied by said second bit in said second destination register, without altering the other bits stored in said destination register; e) selecting a first bit (j) in a first source register (r s ) and a second bit (i) in a second destination register (r d ), placing said first bit in a logic OR with said second bit and writing the resulting bit in the position occupied by said second bit in said second destination register, without altering the other bits stored in said destination register; f) selecting a first bit (j) in a first source register (r s ) and a seocnd bit (i) in a second destination register (r d ), generating a complementary bit of said first bit and placing said complementary bit in a logic OR with said second bit and writing the resulting bit in the position occupied by said second bit in said second destination register, without altering the other bits stored in said destination register; g) selecting a first bit (j) in a first source register (r s ), and writing said first bit in the position occupied by a second bit (i) selected in a second destination register (r d ), without altering the other bits stored in said second destination register; h) selecting a first bit (j) in a first source register (r s ), generating a complementary bit of said first selected bit and writing said complementary bit in the position occupied by a second selected bit (i) in a second destination register (r d ), without altering the other bits stored in said destination register.

Claim 4

A method of manipulating data in a microprocessor having a plurality of registers associated therewith, for performing a logic operation between a first bit selected from the bits stored in a source register and a second bit selected from the bits stored in a destination register distinct from the source register, comprising the steps of performing Set/Reset operations on said selected bit of the destination register; storing the modified data of said destination register in a temporary storage register; eventually saving to said destination register the modified data temporarily stored in said register; all in function of certain parameters determined by the type of logic operator involved in said logic operation between said selected bits and by the value of said selected bit of the source register, all without affecting any other bits in either register.