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https://github.com/netwide-assembler/nasm.git
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48 lines
572 B
NASM
48 lines
572 B
NASM
;; library functions for rdtmain - test of rdx linking and execution
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;; library function = _strcmp, defined as in C
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[SECTION .text]
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[BITS 32]
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[GLOBAL _strcmp]
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_strcmp:
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push ebp
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mov ebp,esp
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;; ebp+8 = first paramater, ebp+12 = second
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mov esi,[ebp+8]
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mov edi,[ebp+12]
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.loop:
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mov cl,byte [esi]
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mov dl,byte [edi]
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cmp cl,dl
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jb .below
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ja .above
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or cl,cl
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jz .match
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inc esi
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inc edi
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jmp .loop
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.below:
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mov eax,-1
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pop ebp
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ret
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.above:
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mov eax,1
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pop ebp
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ret
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.match:
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xor eax,eax
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pop ebp
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ret
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[SECTION .data]
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[GLOBAL _message]
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_message: db 'hello',0 |