Synthèse
Where a custom instruction only impacts data processing, but does not require any additional state space, it can be managed without having to modify the OS code. For example, instructions that treat data as a 4-bit datatype but only using the normal integer register file and status registers could be implemented without needing the OS to be aware of them. Building applications to use these instructions needs either precompiled libraries with them implemented, or a custom toolchain that can targe
Where a custom instruction only impacts data processing, but does not require any additional state space, it can be managed without having to modify the OS code. For example, instructions that treat data as a 4-bit datatype but only using the normal integer register file and status registers could be implemented without needing the OS to be aware of them. Building applications to use these instructions needs either precompiled libraries with them implemented, or a custom toolchain that can target those instructions. Ubuntu’s launchpad. net build infrastructure supports custom toolchains using Private Package Archives (PPA).
The toolchain can either be built in its own right in its own PPA, or a pre-built binary toolchain can be included as part of the application code source tree. In either case, the application code is then built in turn and made available in the PPA.
Source originale
launchpad.net
CORTEX