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vtlmks/gist:2a93af9574e5357512501e888e6f5eaa

Created April 4, 2019 18:30
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memcmp in x64 assembler, should return 0 on equal, or +-
Raw
gistfile1.txt
memcmp Cld
Mov r10, rdi ; save
Mov r11, rsi ; save
Mov rdi, rcx
Mov rsi, rdx
Mov rcx, r8
Mov rdx, r8
Xor eax, eax
Cmpsb
Jeq .done
.not_equal: Mov al, [rdi-1]
Movzx ecx, [rsi-1]
Sub eax, ecx
.done Mov rdi, r10
Mov rsi, r11
Ret
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