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→Constraining an Operand to a Specific Register
==== Constraining an Operand to a Specific Register ====
It is sometimes useful to constrain an operand to a particular register to avoid having to perform moves within the asm code (for example, if an operand will be used as the input to a function call or [[Syscalls|syscall]]).
===== Register Constraints using Explicit Register Variables =====
