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- Link_register abstract "A link register, in many instruction set architectures such as the PowerPC, ARM, and the PA-RISC, is a special purpose register which holds the address to return to when a function call completes. Other architectures (such as SPARC) have a register with the same purpose but another name (in this case, "output register 7" or o7). The usage of a link register allows for faster calls to leaf subroutines. When the subroutine is non-leaf, passing the result address in a register still results in generation of more efficient code for thunks, e.g. for a function whose sole purpose is to call another function with arguments rearranged in some way. Other subroutines can benefit from the use of link register because it can be saved in a batch with other callee-used registers—e.g. an ARM subroutine pushes registers 4-7 along with the link register, LR, by the single instructionSTMDB SP!, {R4-R7, LR} pipelining all memory writes required.".
- Link_register wikiPageID "569759".
- Link_register wikiPageRevisionID "551146067".
- Link_register hasPhotoCollection Link_register.
- Link_register subject Category:Central_processing_unit.
- Link_register comment "A link register, in many instruction set architectures such as the PowerPC, ARM, and the PA-RISC, is a special purpose register which holds the address to return to when a function call completes. Other architectures (such as SPARC) have a register with the same purpose but another name (in this case, "output register 7" or o7). The usage of a link register allows for faster calls to leaf subroutines.".
- Link_register label "Link register".
- Link_register sameAs m.02r2dv.
- Link_register sameAs Q6554324.
- Link_register sameAs Q6554324.
- Link_register wasDerivedFrom Link_register?oldid=551146067.
- Link_register isPrimaryTopicOf Link_register.