#
#------------------------------------------------------------------------------
- .686:
- #.MODEL flat,C
- .xmm:
- .code:
+.global _InternalMemCopyMem
#------------------------------------------------------------------------------
# VOID *
-# _mem_CopyMem (
+# EFIAPI
+# InternalMemCopyMem (
# IN VOID *Destination,
# IN VOID *Source,
# IN UINTN Count
-# )
+# );
#------------------------------------------------------------------------------
-.global _InternalMemCopyMem
_InternalMemCopyMem:
push %esi
push %edi
movl 16(%esp), %esi # esi <- Source
movl 12(%esp), %edi # edi <- Destination
movl 20(%esp), %edx # edx <- Count
- leal -1(%edi,%edx,), %eax # eax <- End of Destination
+ leal -1(%esi,%edx,), %eax # eax <- End of Source
cmpl %edi, %esi
jae L0
- cmpl %esi, %eax # Overlapped?
+ cmpl %edi, %eax # Overlapped?
jae @CopyBackward # Copy backward if overlapped
-L0:
+L0:
xorl %ecx, %ecx
subl %edi, %ecx
andl $15, %ecx # ecx + edi aligns on 16-byte boundary
subl %ecx, %edx # edx <- remaining bytes to copy
rep
movsb
-L1:
+L1:
movl %edx, %ecx
andl $15, %edx
shrl $4, %ecx # ecx <- # of DQwords to copy
jz @CopyBytes
addl $-16, %esp
movdqu %xmm0, (%esp)
-L2:
+L2:
movdqu (%esi), %xmm0
- movntdq %xmm0, (%edi)
+ movntdq %xmm0, (%edi)
addl $16, %esi
addl $16, %edi
loop L2
movdqu (%esp),%xmm0
addl $16, %esp # stack cleanup
jmp @CopyBytes
-@CopyBackward:
- movl %eax, %edi # edi <- Last byte in Destination
- leal -1(%esi,%edx,), %esi # esi <- Last byte in Source
+@CopyBackward:
+ movl %eax, %esi # esi <- Last byte in Source
+ leal -1(%edi,%edx,), %edi # edi <- Last byte in Destination
std
-@CopyBytes:
+@CopyBytes:
movl %edx, %ecx
rep
movsb