1 ;------------------------------------------------------------------------------
3 ; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
4 ; SPDX-License-Identifier: BSD-2-Clause-Patent
12 ; IsZeroBuffer function
16 ;------------------------------------------------------------------------------
20 ;------------------------------------------------------------------------------
23 ; InternalMemIsZeroBuffer (
24 ; IN CONST VOID *Buffer,
27 ;------------------------------------------------------------------------------
28 global ASM_PFX(InternalMemIsZeroBuffer)
29 ASM_PFX(InternalMemIsZeroBuffer):
31 mov edi, [esp + 8] ; edi <- Buffer
32 mov ecx, [esp + 12] ; ecx <- Length
33 mov edx, ecx ; edx <- ecx
34 shr ecx, 2 ; ecx <- number of dwords
35 and edx, 3 ; edx <- number of trailing bytes
36 xor eax, eax ; eax <- 0, also set ZF
38 jnz @ReturnFalse ; ZF=0 means non-zero element found
43 mov eax, 1 ; return TRUE