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2-12-09 - Run time environment of a MIPS program Stack...

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Run time environment of a MIPS program Low address Growth of stack High address Frame pointer Saved argument registers beyond a0-a3 Return address Temporary local variables Stack pointer
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A translation hierarchy HLL program COMPILER Assembly language program ASSEMBLER Machine language module LINKER Library routine Executable machine language program LOADER Memory
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What are Assembler directives? Instructions that are not executed, but they tell the assembler about how to interpret something. Here are some examples: . text {Program instructions here} . data {Data begins here} . byte 84, 104, 101 . asciiz “The quick brown fox” . float f1,. . . , fn . word w1, . . . . wn
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How does an assembler work? In a two-pass assembler PASS 1: Symbol table generation PASS 2: Code generation To be explained in the class …
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Other architectures Not all processors are like MIPS. Example. Accumulator-based machines A single register, called the accumulator , stores the operand before the operation, and stores the result after the operation.
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