1. Updated function headers for all assembly function
2. Optimized register usage in SetMemXX functions in all lib instances 3. Fixed a logical error in CopyMem for all lib instances git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1139 6f19259b-4bc3-4df7-8a09-765794883524
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@@ -23,42 +23,42 @@
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.code
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;------------------------------------------------------------------------------
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; VOID *
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; EFIAPI
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; InternalMemCopyMem (
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; OUT VOID *DestinationBuffer,
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; IN CONST VOID *SourceBuffer,
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; IN UINTN Length
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; );
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;------------------------------------------------------------------------------
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InternalMemCopyMem PROC USES rsi rdi
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mov rsi, rdx ; rsi <- Source
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mov rdi, rcx ; rdi <- Destination
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lea r9, [rdi + r8 - 1] ; r9 <- End of Destination
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lea r9, [rsi + r8 - 1] ; r9 <- End of Source
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cmp rsi, rdi
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mov rax, rdi ; rax <- Destination as return value
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jae @F
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cmp r9, rsi
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cmp r9, rdi
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jae @CopyBackward ; Copy backward if overlapped
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@@:
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xor rcx, rcx
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sub rcx, rsi
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and rcx, 7 ; rcx + rsi aligns on 8-byte boundary
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jz @F
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cmp rcx, r8
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cmova rcx, r8
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sub r8, rcx ; r8 <- remaining bytes to copy
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rep movsb
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@@:
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mov rcx, r8
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and r8, 7
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shr rcx, 3 ; rcx <- # of Qwords to copy
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jz @CopyBytes
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DB 49h, 0fh, 7eh, 0c2h ; movq r10, mm0 ; save mm0
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DB 49h, 0fh, 7eh, 0c2h ; movd r10, mm0 (Save mm0 in r10)
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@@:
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DB 48h, 0fh, 6fh, 06h ; movq mm0, [rsi]
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DB 48h, 0fh, 0e7h, 07h ; movntq [rdi], mm0
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DB 0fh, 6fh, 06h ; movd mm0, [rsi]
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DB 0fh, 0e7h, 07h ; movntq [rdi], mm0
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add rsi, 8
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add rdi, 8
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loop @B
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mfence
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DB 49h, 0fh, 6eh, 0c2h ; movq mm0, r10 ; restore mm0
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DB 49h, 0fh, 6eh, 0c2h ; movd mm0, r10 (Restore mm0)
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jmp @CopyBytes
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@CopyBackward:
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mov rdi, r9 ; rdi <- End of Destination
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lea rsi, [rsi + r8 - 1] ; rsi <- End of Source
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mov rsi, r9 ; rsi <- End of Source
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lea rdi, [rdi + r8 - 1] ; rdi <- End of Destination
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std ; set direction flag
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@CopyBytes:
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mov rcx, r8
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