SPARC Architecture, Assembly Language Programming, and C (2nd Edition)

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Signature _______________________ Name_________________ cs30x____ Student ID ______________________ Score: Quiz 2 CSE 30 Fall 2006 #1. a) Write the SPARC assembly instructions to define the following global variables in the data segment: char Wolfmother[] = "Mind's Eye"; float root_beer = 8.05; #2. What is the value ( in hex ) of %o1 after each set of instructions: a) set 0xCAFEBABE, %o1 sra %o1, 12, %o1 Value in %o1 at this point is 0x ______________________________________________ b) set 0xCAFEBABE, %o1 set 0x5A5A5A5A, %o2 xor %o1, %o2, %o1 Value in %o1 at this point is 0x ______________________________________________ c) set 0xCAFEBABE, %o1 set 0x5A5A5A5A, %o2 and %o1, %o2, %o1 Value in %o1 at this point is 0x ______________________________________________
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Unformatted text preview: #3. Write the save SPARC instruction to allocate 4 doubles as local variables on the stack. save %sp, ______________________________________ , %sp (over) #4. Write the equivalent unoptimized SPARC assembly language instructions to perform the following C code fragment. Use the loop construct specified in class/Notes. C SPARC assembly a = -9129; /* x is mapped to %l0 */ /* a is mapped to %l1 */ while ( a < 129 ) { x = 391 + a; a++; } #5. Write the equivalent unoptimized SPARC assembly language instructions to perform the following C code fragment. C SPARC assembly x = x / 9876; /* x is mapped to %l2 */ Now optimize your answer to eliminate any delay slots : Optimized version of above SPARC assembly...
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