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1. Updated function headers for all assembly function

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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
This commit is contained in:
bxing
2006-07-28 07:28:19 +00:00
parent 27169a56e6
commit eb227e96bd
106 changed files with 1006 additions and 457 deletions
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47
MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem.S
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@@ -21,44 +21,43 @@
#
#------------------------------------------------------------------------------
.686:
#.MODEL flat,C
.xmm:
.code:
.global _InternalMemSetMem
#------------------------------------------------------------------------------
# VOID *
# _mem_SetMem (
# InternalMemSetMem (
# IN VOID *Buffer,
# IN UINTN Count,
# IN UINT8 Value
# )
#------------------------------------------------------------------------------
.global _InternalMemSetMem
_InternalMemSetMem:
push %edi
movb 16(%esp), %al
movb %al, %ah
shrdl $16, %eax, %edx
shldl $16, %edx, %eax
movl 12(%esp), %ecx # ecx <- Count
movl 8(%esp), %edi # edi <- Buffer
movl %ecx, %edx
shrl $3, %ecx # # of Qwords to set
movb 16(%esp), %al # al <- Value
jz @SetBytes
movb %al, %ah # ax <- Value | (Value << 8)
pushl %ecx
pushl %ecx
movq %mm0, (%esp) # save mm0
movd %eax, %mm0
pshufw $0x0,%mm0,%mm0
L0:
movntq %mm0, (%edi)
addl $8, %edi
loop L0
mfence
movq (%esp), %mm0 # restore mm0
popl %ecx # stack cleanup
popl %ecx
@SetBytes:
andl $7, %edx
shrl $3, %ecx # # of Qwords to set
jz L1
addl $0x-10, %esp
movq %mm0, (%esp) # save mm0
movq %mm1, 8(%esp) # save mm1
movd %eax, %mm0
movd %eax, %mm1
psllq $32, %mm0
por %mm1, %mm0 # fill mm0 with 8 Value's
L0:
movq %mm0, (%edi)
addl $8, %edi
loopl L0
movq (%esp), %mm0 # restore mm0
movq 8(%esp), %mm1 # restore mm1
addl $0x10, %esp # stack cleanup
L1:
movl %edx, %ecx
rep
stosb