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https://github.com/CloverHackyColor/CloverBootloader.git
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50 lines
1.3 KiB
NASM
50 lines
1.3 KiB
NASM
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;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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; Module Name:
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;
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; SetMem32.nasm
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;
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; Abstract:
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;
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; SetMem32 function
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;
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; Notes:
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;
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;------------------------------------------------------------------------------
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SECTION .text
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;------------------------------------------------------------------------------
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; VOID *
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; EFIAPI
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; InternalMemSetMem32 (
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; IN VOID *Buffer,
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; IN UINTN Count,
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; IN UINT32 Value
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(InternalMemSetMem32)
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ASM_PFX(InternalMemSetMem32):
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mov eax, [esp + 4] ; eax <- Buffer as return value
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mov ecx, [esp + 8] ; ecx <- Count
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movd mm0, dword [esp + 12] ; mm0 <- Value
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shr ecx, 1 ; ecx <- number of qwords to set
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mov edx, eax ; edx <- Buffer
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jz @SetDwords
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movq mm1, mm0
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psllq mm1, 32
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por mm0, mm1
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.0:
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movq qword [edx], mm0
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lea edx, [edx + 8] ; use "lea" to avoid change in flags
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loop .0
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@SetDwords:
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jnc .1
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movd dword [edx], mm0
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.1:
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ret
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