Assembly Matrix Question: Your task is to figure out the values of the P and Q macros that have been defined and control the size of the array matrix (double array). Note that the values have been changed from the j.c code and you need to derive the values by reading the assembly code that is given below. We will first show the C code and then the assembly that was generated. This C code: #define P ? #define Q ? int mat1[P][Q]; int mat2[Q][P]; void copy_element( int i, int j) { mat1[ i ][ j ] = mat2[ j ][ i]; } Is translated into the following X86-64 Assembly: copy_element: movslq %edi, %rdi movslq %esi, %rsi leaq leaq addq movl (%rsi,%rsi,2), %rdx (%rdx,%rdx), %rax %rdi, %rax mat2(,%rax,4), %ecx (%rdi,%rdi,4), %rax (%rdi,%rax,2), %rdx (%rdx,%rdx), %rax %rax, %rsi %ecx, mat1(, %rsi,4) leaq Leaq Leaq addq movl ret
Assembly Matrix Question: Your task is to figure out the values of the P and Q macros that have been defined and control the size of the array matrix (double array). Note that the values have been changed from the j.c code and you need to derive the values by reading the assembly code that is given below. We will first show the C code and then the assembly that was generated. This C code: #define P ? #define Q ? int mat1[P][Q]; int mat2[Q][P]; void copy_element( int i, int j) { mat1[ i ][ j ] = mat2[ j ][ i]; } Is translated into the following X86-64 Assembly: copy_element: movslq %edi, %rdi movslq %esi, %rsi leaq leaq addq movl (%rsi,%rsi,2), %rdx (%rdx,%rdx), %rax %rdi, %rax mat2(,%rax,4), %ecx (%rdi,%rdi,4), %rax (%rdi,%rax,2), %rdx (%rdx,%rdx), %rax %rax, %rsi %ecx, mat1(, %rsi,4) leaq Leaq Leaq addq movl ret
Computer Networking: A Top-Down Approach (7th Edition)
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![Assembly Matrix Question:
Your task is to figure out the values of the P and Q
macros that have been defined and control the size of
the array matrix (double array).
Note that the values have been changed from the j.c
code and you need to derive the values by reading the
assembly code that is given below. We will first show
the C code and then the assembly that was generated.
This C code:
#define P ?
#define Q ?
int mat1[P][Q];
int mat2[Q][P];
void copy_element( int i, int j) {
mat1[ i ][ j ] = mat2[ j ][ i ];
}
Is translated into the following X86-64 Assembly:
copy element:
movslq %edi, %rdi
movslq %esi, %rsi
leaq
leaq
addq
movl
(%rsi,%rsi,2), %rdx
(%rdx,%rdx), %rax
%rdi, %rax
mat2(,%rax, 4), %ecx
(%rdi,%rdi,4), %rax
(%rdi,%rax,2), %rdx
(%rdx,%rdx), %rax
%rax, %rsi
%ecx, mat1(, %rsi,4)
leaq
Leaq
Leaq
addq
movl
ret
Your task is to figure out the size of the arrays.
What is the value of P?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb119b273-3954-43c2-9bb6-49386736b323%2F5e077a00-8414-4ef2-9107-e75c0229af83%2Fmjw3xi9_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Assembly Matrix Question:
Your task is to figure out the values of the P and Q
macros that have been defined and control the size of
the array matrix (double array).
Note that the values have been changed from the j.c
code and you need to derive the values by reading the
assembly code that is given below. We will first show
the C code and then the assembly that was generated.
This C code:
#define P ?
#define Q ?
int mat1[P][Q];
int mat2[Q][P];
void copy_element( int i, int j) {
mat1[ i ][ j ] = mat2[ j ][ i ];
}
Is translated into the following X86-64 Assembly:
copy element:
movslq %edi, %rdi
movslq %esi, %rsi
leaq
leaq
addq
movl
(%rsi,%rsi,2), %rdx
(%rdx,%rdx), %rax
%rdi, %rax
mat2(,%rax, 4), %ecx
(%rdi,%rdi,4), %rax
(%rdi,%rax,2), %rdx
(%rdx,%rdx), %rax
%rax, %rsi
%ecx, mat1(, %rsi,4)
leaq
Leaq
Leaq
addq
movl
ret
Your task is to figure out the size of the arrays.
What is the value of P?
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