void baz(int a, int * p) { int c; c = a-*p; if (c) { int d = c*2; *p -= d; (continued on next page) pushq %rbp movq %rsp,%rbp subq $16,%rsp movl %ecx,16(%rbp) movq %rdx, 24(%rbp) movq 24(%rbp), %rax movl (%rax),%eax movl 16(%rbp),%edx subl %eax,%edx movl %edx,%eax movl %eax,-4(%rbp) cmpl $0, -4(%rbp) je L2 movl 4(%rbp),%eax addl %eax,%eax movl %eax,-8(%rbp) movl 24(%rbp),%rax movl (%rax),%eax -8(%rbp),%eax %eax,%edx movq 24(%rbp), %rax movl %edx, (%rax) jmp L4: subl movl
void baz(int a, int * p) { int c; c = a-*p; if (c) { int d = c*2; *p -= d; (continued on next page) pushq %rbp movq %rsp,%rbp subq $16,%rsp movl %ecx,16(%rbp) movq %rdx, 24(%rbp) movq 24(%rbp), %rax movl (%rax),%eax movl 16(%rbp),%edx subl %eax,%edx movl %edx,%eax movl %eax,-4(%rbp) cmpl $0, -4(%rbp) je L2 movl 4(%rbp),%eax addl %eax,%eax movl %eax,-8(%rbp) movl 24(%rbp),%rax movl (%rax),%eax -8(%rbp),%eax %eax,%edx movq 24(%rbp), %rax movl %edx, (%rax) jmp L4: subl movl
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
![void baz(int a, int * p)
{
pushq %rbp
movq %rsp,%rbp
subq $16,%rsp
int c;
c = a-*p;
movl %ecx,16(%rbp)
movq %rdx, 24(%rbp)
movq 24(%rbp), %rax
movl (%rax),%eax
movl 16(%rbp),%edx
subl %eax,%edx
movl %edx,%eax
movl %eax,-4(%rbp)
cmpl $0, -4(%rbp)
je L2
if (c)
{
int d = c*2;
movl -4(%rbp),%eax
addl %eax,%eax
movl %eax,-8(%rbp)
*p -= d;
movl 24(%rbp),%rax
movl (%rax),%eax
subl -8(%rbp),%eax
movl %eax,%edx
movq 24(%rbp), %rax
movl %edx, (%rax)
jmp L4:
}
(continued on next page)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa57f05dc-4210-403a-9249-91e5afd8264b%2F04645efe-9de2-45a7-b466-362d6f960cd7%2Ff9lv75n_processed.jpeg&w=3840&q=75)
Transcribed Image Text:void baz(int a, int * p)
{
pushq %rbp
movq %rsp,%rbp
subq $16,%rsp
int c;
c = a-*p;
movl %ecx,16(%rbp)
movq %rdx, 24(%rbp)
movq 24(%rbp), %rax
movl (%rax),%eax
movl 16(%rbp),%edx
subl %eax,%edx
movl %edx,%eax
movl %eax,-4(%rbp)
cmpl $0, -4(%rbp)
je L2
if (c)
{
int d = c*2;
movl -4(%rbp),%eax
addl %eax,%eax
movl %eax,-8(%rbp)
*p -= d;
movl 24(%rbp),%rax
movl (%rax),%eax
subl -8(%rbp),%eax
movl %eax,%edx
movq 24(%rbp), %rax
movl %edx, (%rax)
jmp L4:
}
(continued on next page)
![else
{
int e = "p/2;
L2:
movq 24(%rbp),%rax
movl (%rax),%eax
movl %eax, %edx
shrl $31, %edx
addl %edx, %eax
sarl
%eax
movl %eax,-12(%rbp)
*p += e-a;
movl 24(%rbp),%rax
movl (%rax), %edx
movl -12(%rbp), %eax
subl 16(%rbp),%eax
addl
%eax,%edx
movq 24(%rbp), %rax
movl %edx,(%rax)
L4:
addq $16, %rsp
popq %rbp
ret
}
3. Registers
Rewrite the preceding example using as many registers as is reasonable.
If you use any callee save registers, remember to add the save code.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa57f05dc-4210-403a-9249-91e5afd8264b%2F04645efe-9de2-45a7-b466-362d6f960cd7%2F75gq2l_processed.jpeg&w=3840&q=75)
Transcribed Image Text:else
{
int e = "p/2;
L2:
movq 24(%rbp),%rax
movl (%rax),%eax
movl %eax, %edx
shrl $31, %edx
addl %edx, %eax
sarl
%eax
movl %eax,-12(%rbp)
*p += e-a;
movl 24(%rbp),%rax
movl (%rax), %edx
movl -12(%rbp), %eax
subl 16(%rbp),%eax
addl
%eax,%edx
movq 24(%rbp), %rax
movl %edx,(%rax)
L4:
addq $16, %rsp
popq %rbp
ret
}
3. Registers
Rewrite the preceding example using as many registers as is reasonable.
If you use any callee save registers, remember to add the save code.
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