I know that its getting 0 into ebx but why? I’m so sorry if it looks like a no-brainer question to you, its my first week of learning assembly and a few months of programming. I haven’t included everything below because it is a quite long, lmk if its necessary The assembly is from the… Read More what is the purpose of "movl $0, %ebx" or getting 0 into ebx?

My perf report shows everything in AT&T syntax: … 0,18 │ pop %rax 0,14 │ ← retq 0,18 │a9: vmovsd -0x8(%rdi,%rsi,8),%xmm0 0,12 │af: pop %rax │ ← retq │b1: vxorpd %xmm2,%xmm2,%xmm2 0,02 │ vxorpd %xmm3,%xmm3,%xmm3 │b9: vmovsd 0x8(%rdi,%rax,8),%xmm4 0,82 │ vmulsd %xmm1,%xmm1,%xmm1 0,16 │ vsubsd %xmm3,%xmm1,%xmm1 0,96 │ vsubsd %xmm2,%xmm4,%xmm3 0,57 │ vmulsd %xmm3,%xmm0,%xmm0 5,34… Read More Choose syntax for perf assembly report