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[SPCA] Format

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Janis Hutz
2026-01-11 08:05:05 +01:00
parent 35c06e4edf
commit acffe6b3e6
4 changed files with 24 additions and 24 deletions
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26
semester3/spca/code-examples/01_asm/01_sum.s
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@@ -1,13 +1,13 @@
sum: // Label sum: # Label
endbr64 // Indirect Branch target (No effect on code's logic) endbr64 # Indirect Branch target (No effect on code's logic)
pushq %rbp // Preserve caller stack frame pushq %rbp # Preserve caller stack frame
movq %rsp, %rbp // Set up new stack frame movq %rsp, %rbp # Set up new stack frame
movl %edi, -20(%rbp) // Arg1 register -> stack movl %edi, -20(%rbp) # Arg1 register -> stack
movl %esi, -24(%rbp) // Arg2 register -> stack movl %esi, -24(%rbp) # Arg2 register -> stack
movl -20(%rbp), %edx // stack[Arg1] -> gp register movl -20(%rbp), %edx # stack[Arg1] -> gp register
movl -24(%rbp), %eax // stack[Arg2] -> gp register movl -24(%rbp), %eax # stack[Arg2] -> gp register
addl %edx, %eax // Add Arg1 + Arg2 -> gp register addl %edx, %eax # Add Arg1 + Arg2 -> gp register
movl %eax, -4(%rbp) // result -> stack movl %eax, -4(%rbp) # result -> stack
movl -4(%rbp), %eax // stack[result] -> return register movl -4(%rbp), %eax # stack[result] -> return register
popq %rbp // Restore caller stack frame popq %rbp # Restore caller stack frame
ret // jump back to caller ret # jump back to caller

10
semester3/spca/code-examples/01_asm/02_max.s
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@@ -1,9 +1,9 @@
max: max:
cmpl %esi, %edi // Set condition flags cmpl %esi, %edi # Set condition flags
jle .IF // Conditional jump if %edi <= %esi jle .IF # Conditional jump if %edi <= %esi
movl %edi, %edx // %edi -> return register movl %edi, %edx # %edi -> return register
jmp .ELSE jmp .ELSE
.IF: .IF:
movl %esi, %edx // &esi -> return register movl %esi, %edx # &esi -> return register
.ELSE: .ELSE:
ret ret

10
semester3/spca/code-examples/01_asm/03_absdiff.s
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@@ -1,8 +1,8 @@
absdiff: absdiff:
movl %edi, %eax movl %edi, %eax
subl %esi, %eax // arg2 - arg1 -> eax subl %esi, %eax # arg2 - arg1 -> eax
movl %esi, %edx movl %esi, %edx
subl %edi, %edx // arg1 - arg2 -> edx subl %edi, %edx # arg1 - arg2 -> edx
cmpl %esi, %edi // Set condition flags cmpl %esi, %edi # Set condition flags
cmovle %edx, %eax // edx -> eax, only if eax <= edx cmovle %edx, %eax # edx -> eax, only if eax <= edx
ret ret

2
semester3/spca/parts/00_asm/04_control-flow.tex
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@@ -12,4 +12,4 @@ A function using an \verb|if/else| construct to choose the maximum of $2$ number
A function computing the absolute difference $|x-y|$ using an \verb|if/else| construct, might use a conditional \verb|move| instead: A function computing the absolute difference $|x-y|$ using an \verb|if/else| construct, might use a conditional \verb|move| instead:
\inputcodewithfilename{gas}{code-examples/01_asm/}{03_absdiff.s} \inputcodewithfilename{gas}{code-examples/01_asm/}{03_absdiff.s}