45 lines
673 B
ArmAsm
45 lines
673 B
ArmAsm
.global memcpy
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memcpy:
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xchgl 4(%esp), %edi
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xchgl 8(%esp), %esi
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movl 12(%esp), %ecx
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movl %edi, %edx
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rep movsb
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movl 4(%esp), %edi
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movl 8(%esp), %esi
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movl %edx, %eax
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ret
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.global memmove
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memmove:
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xchgl 4(%esp), %edi
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xchgl 8(%esp), %esi
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movl 12(%esp), %ecx
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movl %edi, %edx
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cmpl %edi, %esi
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jb .memmove_slow
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rep movsb
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.memmove_done:
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movl 4(%esp), %edi
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movl 8(%esp), %esi
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movl %edx, %eax
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ret
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.memmove_slow:
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leal -1(%edi, %ecx), %edi
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leal -1(%esi, %ecx), %esi
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std
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rep movsb
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cld
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jmp .memmove_done
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.global memset
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memset:
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xchgl 4(%esp), %edi
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movl 8(%esp), %eax
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movl 12(%esp), %ecx
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movl %edi, %edx
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rep stosb
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movl 4(%esp), %edi
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movl %edx, %eax
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ret
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