Notes from class:

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Slide 3
                                E     i
*(&E[i]+i)   E[2*i]     movl (%edx, %ecx, 8), %eax

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Slide 4

Address of S[] is xS, in %edx
Value i in %ecx

S+1      short*	   xS+2        leal 2(%edx),%eax

S[3]     short     M[xS+6]     movw 6(%edx),%ax

&S[i]    short*    xS+(i*2)    leal (%edx, %ecx, 2), %eax

S[4*i+1] short     M[xS+(8*i)+2] movw 2(%edx, %ecx, 8), %ax

S+i-5    short*    xS+(2*i)-10  leal -10(%edx, %ecx, 2), %eax

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Slide 6

int A[4][3];

typedef int a3[3];
a3 A[4];

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Slide 10

N = 7
int matrix1[M][N];

matrix1 + (i*7+j)*4;
matrix1[i][j];

using matrix2 ... M = 5

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Slide 15

void fix_set_diag(fix_matrix A, int val) { 
  int i; 
  int *pA = &A[0][0];
  for (i = 0; i < N; i++, p += 16+1) 
    *p = val;
}

void fix_set_diag(fix_matrix A, int val) { 
  int i; 
  int *pA = &A[0][0], *pAend = pa + N*(16+1);
  for (; p < pAend; p += 16+1) 
    *p = val;
}