# 1st parameter in rdi
# 2nd parameter in esi/rsi
initMat:
.LFB0:
  testl  %esi, %esi          # if n <= 0 
  jle  .L1                   #    goto .L1
  leal  -1(%rsi), %ecx       # ecx = n-1   
  leaq  0(,%rcx,4), %rax     # rax = 4(n-1)
  leaq  4(%rdi,%rax), %rdx   # rdx = a+4n
                             #  address of nth element of 0th row
  addq  %rcx, %rax           # rax = 5(n-1)
  leaq  (%rcx,%rax,2), %rax  # rax = 11(n-1)
  leaq  44(%rdi,%rax,4), %rsi # rsi = a+44n
                              #  address of the nth element of nth row
  notq  %rcx                 # rcx = not(n-1)
                             #     = -n
  salq  $2, %rcx             # rcx = -4n
  jmp  .L3                   # goto .L3 
.L6:
  addq  $40, %rdx            # rdx = rdx+40
                             #    address of the nth element of the 
                             #    next row
                             #  
  cmpq  %rsi, %rdx           # if rdx == a+44n
  je  .L1                    #    goto .L1
.L3:                     
  leaq  (%rcx,%rdx), %rax    # rax = a+40i
.L4:
  movl  $1, (%rax)           # a[i][j] = 1
  addq  $4, %rax             # rax = a+40i+4(j+1)
  cmpq  %rdx, %rax           # if rax < rdx
  jne  .L4                   #    goto .L4, next in the row
  jmp  .L6                   # else goto .L6, next row
.L1:
  ret