UMBC CMSC 313, Computer Organization & Assembly Language, Spring 2013

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Thursday, February 21, 2013

Assigned:         Due:   

Subroutines

Assigned Reading in Null & Lobur:   

Assigned Reading in Duntemann:  Ch 10

Actual Slides (in PDF): Slides08.pdf

Topics:

• Stack instructions: PUSH, POP
• Subroutine instructions: CALL, RET

Programs Shown:

• subroutine.asm and sample run.
• recurse.asm and sample run.

Extra Materials (not covered in class)

Slides for materials (in PDF): SlidesExtra.pdf

Programs Not Shown:

• Using jump tables to simulate a switch statement: switch.c, switch.asm and listing.
• Using string instructions to rewrite toupper.asm: toupper2.asm.
• Using the rep prefix: rep.asm and rep.txt.