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Line 167: It is up to the callee to save the link-register if it is not a leaf-function, a single instruction extends the stack and saves the link register. Dual issue mode, available on XS2, enables one short load, store, or ~~brancg~~branch instruction to be paired with one short resource instruction. Short arithmetic instructions can be paired with any instruction. This enables inner-loops that, for example, transfer data from memory to IO to be halved in length by issuing the LOAD instruction together with the ADD instruction, and the change to the counter together with the branch instruction. ===Parallel programming model===

XCore Architecture: Difference between revisions