Some sample correct solutions for HW2:

1. a) 

  for(int i=4000; i!=0; i--) {
      b[i] = a[i] * b[i];
  }
  
1.d)  
  
  ld   r20,  16000
  ld   r19,  20000
  ld   r18,  40000
start:
  add  r3, r20, r19
  add r4, r20, r18
  ld r1, 0(r3)
  ld r5, -4(r3)
  ld r6, -8(r3)
  ld r7, -12(r3)
  ld r2, 0(r4)
  ld r8, -4(r4)
  ld r9, -8(r4)
  ld r10, -12(r4)
  ld r17, 16
  mult r2, r1, r2
  mult r8, r5, r8
  mult r9, r6, r9
  mult r10, r7, r10
  sub r20, r20, r17
  st 0(r4), r2
  st 4(r4), r8
  st 8(r4), r9
  st 12(r4), r10
  bnez r20, start

2) 

  Real CPI = 1.2 + 1 * 0.02 * 140 + 0.15 * 0.12 * 140 = 6.52
  AMAT = ( 1 * (1 + 0.02 * 140) + 0.15 * (1+ 0.12 * 140) ) / 1.15 = 5.62