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Unformatted text preview: ,%eax,1) %ebx %ebp,%esp %ebp Figure 3.38: Disassembled Code For Problem 3.36. Homework Problem 3.39 [Category 2]: Use the asm statement to implement a function with the following prototype: void full_umul(unsigned x, unsigned y, unsigned dest); This function should compute the full 64-bit product of its arguments and store the results in the destination array, with dest[0] having the low-order 4 bytes and dest[1] having the high-order 4 bytes. Homework Problem 3.40 [Category 2]: The fscale instruction computes the function Ü ¡ ¾ÊÌ ´Ýµ for floating-point values Ü and Ý , where ÊÌ denotes the round-toward-zero function, rounding positive numbers downward and negative numbers upward. The arguments to fscale come from the floating-point register stack, with Ü in %st(0) and Ý in %st(1). It writes the computed value written %st(0) without popping the second argument. (The actual implementation of this instruction works by adding ÊÌ ´Ý µ to the exponent of Ü). Using an asm statement, implem...
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This note was uploaded on 09/02/2010 for the course ELECTRICAL 360 taught by Professor Schultz during the Spring '10 term at BYU.

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