27 lines
333 B
NASM
27 lines
333 B
NASM
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BITS 32
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GLOBAL fact
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SECTION .text
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fact:
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mov eax, [esp+4] ; n в eax
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cmp eax, 1
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je ret1 ; 1 ! = 1
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push ecx ; save used ecx
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dec eax ; eax = n-1
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push eax
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call fact ; в eax (n-1)!
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pop ecx ; ecx = n
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inc ecx
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mul ecx ; eax *= ecx
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pop ecx ; restore used ecx
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ret1:
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ret
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