28 lines
763 B
ArmAsm
28 lines
763 B
ArmAsm
# _strncpy() Author: Kees J. Bot
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# 1 Jan 1994
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# char *_strncpy(char *s1, const char *s2, size_t ecx)
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# Copy string s2 to s1.
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#
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.intel_syntax
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.text
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.globl __strncpy
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.align 16
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__strncpy:
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mov edi, [ebp+12] # edi = string s2
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xorb al, al # Look for a zero byte
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mov edx, ecx # Save maximum count
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cld
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repne
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scasb # Look for end of s2
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sub edx, ecx # Number of bytes in s2 including null
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xchg ecx, edx
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mov esi, [ebp+12] # esi = string s2
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mov edi, [ebp+8] # edi = string s1
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rep
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movsb # Copy bytes
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ret
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