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[SPCA] Improve Stack section

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RobinB27
2026-01-13 14:46:30 +01:00
parent b1ff4cf1dd
commit 4629cb75e1
7 changed files with 65 additions and 12 deletions
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15
semester3/spca/code-examples/01_asm/07_swap_and_sum.s Normal file
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swap_and_sum:
movq %rbx, -16(%rsp) # Save %rbx
movslq %esi,%rbx # Save i (and extend)
movq %r12, -8(%rsp) # Save %r12
movq %rdi, %r12 # Save a
leaq (%rdi,%rbx,8), %rdi # & a[i] -> %rdi (arg 1)
subq $16, %rsp # Allocate stack frame
leaq 8(%rdi), %rsi # & a[i+1] -> %rsi (arg 2)
call swap
movq (%r12,%rbx,8), %rax # a[i]
addq %rax, sum(%rip) # sum += a[i]
movq (%rsp), %rbx # Restore %rbx
movq 8(%rsp), %r12 # Restore %r12
addq $16, %rsp # Deallocate stack frame
ret