Consider a computer that does not have a TSL instruction, but does have an instruction to swap the contents of a register and a memory location in a single indivisible action.   Can that be used to write a routine enter-region such as that used with TSL?  Give pseudocode for this routi

Systems Architecture
7th Edition
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Stephen D. Burd
Chapter4: Processor Technology And Architecture
Section: Chapter Questions
Problem 2PE: If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the...
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Consider a computer that does not have a TSL instruction, but does
have an instruction to swap the contents of a register and a memory
location in a single indivisible action.  

Can that be used to write a routine enter-region such as that used with TSL?  Give pseudocode
for this routine if it can be made, or explain why it can not be done.

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