diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.nasm')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.nasm | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.nasm b/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.nasm index d771810542..485f74ddac 100644 --- a/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.nasm +++ b/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.nasm @@ -37,17 +37,28 @@ ASM_PFX(InternalMemSetMem64): add rdx, 8
dec rcx
.0:
- shr rcx, 1
+ push rbx
+ mov rbx, rcx
+ and rbx, 7
+ shr rcx, 3
jz @SetQwords
movlhps xmm0, xmm0
.1:
movntdq [rdx], xmm0
- lea rdx, [rdx + 16]
+ movntdq [rdx + 16], xmm0
+ movntdq [rdx + 32], xmm0
+ movntdq [rdx + 48], xmm0
+ lea rdx, [rdx + 64]
loop .1
mfence
@SetQwords:
- jnc .2
- mov [rdx], r8
+ push rdi
+ mov rcx, rbx
+ mov rax, r8
+ mov rdi, rdx
+ rep stosq
+ pop rdi
.2:
+ pop rbx
ret
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