This homework tests your ability to evaluate potential pipeline hazards. The following program is used as a model. It computes vehicle sales by large (>50000) and small makes.

// WarRawWawRarSample.cpp : Sample program for Homework 5

#include

#include

#define makes 29

int main(int argc, char* argv[])

{

// Vehicle sales from

// http://online.wsj.com/mdc/public/page/2_3022-autosales.html#autosalesD

char makers[makes][12] = {

"GM", "Ford", "Chrysler", "Toyota",

"Honda", "Nissan", "Hyundai", "Mazda",

"Mitsubishi", "Kia", "Subaru", "Mercedes",

"Volvo", "Volkswagen", "Audi", "BMW",

"Porsche", "Fiat", "Tesla", "Jaguar",

"Land Rover", "Alfa Romeo", "Mini", "Smart",

"Ferrari", "Maserati", "Bentley", "Lamborghini",

"Rolls Royce"};

int sales[makes] = {

259557, 229739, 196526, 211125,

148829, 123861, 62213, 26195,

9674, 56508, 50380, 31825,

6168, 27112, 17801, 24951,

5410, 3045, 2900, 1087,

5188, 60, 4796, 466,

217, 1066, 110, 89,

79};

int i, j, large = 0, small = 0, largetot = 0, smalltot = 0;

const int lim = 50000;

for (i = 0; i < makes; i++) {

if (sales[i] > lim) {

large++;

largetot += sales[i];

}

else {

small++;

smalltot += sales[i];

}

}

std::cout << "Large:" << large << " vehicles:" << largetot << " Small:" << small << " vehicles:" << smalltot << ' ';

return 0;

}

On the following page, you will find the assembly code generated by the for loop above. List the type of hazard (WAR, WAW, RAW, RAR, Control, or none) and the data item causing the hazard in the spaces provided. These lines will be identified by an arrow ( ). Ignore lines marked N/A. The associated C++ code is interspersed. Note that the dword ptr [i] syntax refers to i as a variable, not as a subscript.

Address	Opcode	Operands	Hazard Type	Caused By
for (i = 0; i < makes; i++) {
010369EF	mov	dword ptr [i],0	N/A
010369F9	jmp	main+5EAh (01036A0Ah)	N/A
010369FB	mov	eax,dword ptr [i]
01036A01	add	eax,1
01036A04	mov	dword ptr [i],eax
01036A0A	cmp	dword ptr [i],1Dh	N/A
01036A11	jge	main+65Ah (01036A7Ah)	N/A
if (sales[i] > lim) {
01036A13	mov	eax,dword ptr [i]
01036A19	cmp	dword ptr sales[eax*4],0C350h	N/A
01036A24	jle	main+630h (01036A50h)	N/A
large++;
01036A26	mov	eax,dword ptr [large]	N/A
01036A2C	add	eax,1	N/A
01036A2F	mov	dword ptr [large],eax	N/A
largetot += sales[i];
01036A35	mov	eax,dword ptr [i]
01036A3B	mov	ecx,dword ptr [largetot]
01036A41	add	ecx,dword ptr sales[eax*4]
01036A48	mov	dword ptr [largetot],ecx
}
else {
01036A4E	jmp	main+658h (01036A78h)	N/A
small++;
01036A50	mov	eax,dword ptr [small]
01036A56	add	eax,1	N/A
01036A59	mov	dword ptr [small],eax	N/A
smalltot += sales[i];
01036A5F	mov	eax,dword ptr [i]	N/A
01036A65	mov	ecx,dword ptr [smalltot]	N/A
01036A6B	add	ecx,dword ptr sales[eax*4]	N/A
01036A72	mov	dword ptr [smalltot],ecx
}
}
01036A78	jmp	main+5DBh (010369FBh)	N/A

Which hazard type listed on the previous page (not none) is not really a hazard? ___________________