$30.00
Description
9.1 Assignment
If floating point hardware is available, it can be used to greatly accelerate nonintegral mathematical operations. For this lab, you are to rewrite the program from Lab 8, but this time you must use floating point instructions to perform your calculations.
9.2 Instructions
Rewrite the program from Lab 8, but this time, use ARM VFP instructions to perform floating point mathematics. You can use printf and scanf for output and input of floating point values. The following example shows how to print floating point values.
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fmt: asciz “%f\n”
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@@ printf expects all floating point parameters to be passed

@@ as IEEE double precision. If the second parameter to printf
10@@ is a float, then printf expects the 64bit value to be
11@@ passed in two registers. The choice of registers depends
12@@ on the stack pointer.
13@@ printf acts as if r0r3 are part of the stack and requires
14@@ the 64bit value to be aligned on an 8byte boundary. The
15@@ following lines print out the number in d0 by moving it to
16@@ the appropriate registers and calling printf.
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tst 
sp,#4 
@ check to see if stack is aligned 

vmovne r1, r2, d0@ move to r1,r2 if not aligned

vmoveq r2, r3, d0@ move to r2,r3 if aligned
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ldr 
r0,=fmt 
@ load pointer to format string 
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bl 
printf 

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