diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/X64/SetMem.S')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/X64/SetMem.S | 51 |
1 files changed, 25 insertions, 26 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem.S b/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem.S index d2c2542..a17813a 100644 --- a/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem.S +++ b/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem.S @@ -3,7 +3,7 @@ #
#------------------------------------------------------------------------------
#
-# Copyright (c) 2006 - 2008, Intel Corporation
+# Copyright (c) 2006 - 2009, Intel Corporation
# All rights reserved. This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
@@ -34,40 +34,39 @@ # IN UINT8 Value
# )
#------------------------------------------------------------------------------
-.intel_syntax noprefix
ASM_GLOBAL ASM_PFX(InternalMemSetMem)
ASM_PFX(InternalMemSetMem):
- push rdi
- mov rdi, rcx # rdi <- Buffer
- mov al, r8b # al <- Value
- mov r9, rdi # r9 <- Buffer as return value
- xor rcx, rcx
- sub rcx, rdi
- and rcx, 15 # rcx + rdi aligns on 16-byte boundary
+ pushq %rdi
+ movq %rcx, %rdi # rdi <- Buffer
+ movb %r8b, %al # al <- Value
+ movq %rdi, %r9 # r9 <- Buffer as return value
+ xorq %rcx, %rcx
+ subq %rdi, %rcx
+ andq $15, %rcx # rcx + rdi aligns on 16-byte boundary
jz L0
- cmp rcx, rdx
- cmova rcx, rdx
- sub rdx, rcx
+ cmpq %rdx, %rcx
+ cmova %rdx, %rcx
+ subq %rcx, %rdx
rep stosb
L0:
- mov rcx, rdx
- and rdx, 15
- shr rcx, 4
+ movq %rdx, %rcx
+ andq $15, %rdx
+ shrq $4, %rcx
jz L_SetBytes
- mov ah, al # ax <- Value repeats twice
- movdqa [rsp + 0x10], xmm0 # save xmm0
- movd xmm0, eax # xmm0[0..16] <- Value repeats twice
- pshuflw xmm0, xmm0, 0 # xmm0[0..63] <- Value repeats 8 times
- movlhps xmm0, xmm0 # xmm0 <- Value repeats 16 times
+ movb %al, %ah # ax <- Value repeats twice
+ movdqa %xmm0, 0x10(%rsp) # save xmm0
+ movd %eax, %xmm0 # xmm0[0..16] <- Value repeats twice
+ pshuflw $0, %xmm0, %xmm0 # xmm0[0..63] <- Value repeats 8 times
+ movlhps %xmm0, %xmm0 # xmm0 <- Value repeats 16 times
L1:
- movntdq [rdi], xmm0 # rdi should be 16-byte aligned
- add rdi, 16
+ movntdq %xmm0, (%rdi) # rdi should be 16-byte aligned
+ add $16, %rdi
loop L1
mfence
- movdqa xmm0, [rsp + 0x10] # restore xmm0
+ movdqa 0x10(%rsp), %xmm0 # restore xmm0
L_SetBytes:
- mov ecx, edx # high 32 bits of rcx are always zero
+ movl %edx, %ecx # high 32 bits of rcx are always zero
rep stosb
- mov rax, r9 # rax <- Return value
- pop rdi
+ movq %r9, %rax # rax <- Return value
+ popq %rdi
ret
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