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https://github.com/CloverHackyColor/CloverBootloader.git
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54 lines
1.2 KiB
NASM
54 lines
1.2 KiB
NASM
;------------------------------------------------------------------------------
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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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; SetMem64.nasm
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;
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; Abstract:
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;
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; SetMem64 function
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;
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; Notes:
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;
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;------------------------------------------------------------------------------
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DEFAULT REL
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SECTION .text
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;------------------------------------------------------------------------------
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; VOID *
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; InternalMemSetMem64 (
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; IN VOID *Buffer,
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; IN UINTN Count,
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; IN UINT64 Value
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; )
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;------------------------------------------------------------------------------
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global ASM_PFX(InternalMemSetMem64)
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ASM_PFX(InternalMemSetMem64):
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mov rax, rcx ; rax <- Buffer
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xchg rcx, rdx ; rcx <- Count & rdx <- Buffer
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test dl, 8
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movq xmm0, r8
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jz .0
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mov [rdx], r8
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add rdx, 8
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dec rcx
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.0:
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shr rcx, 1
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jz @SetQwords
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movlhps xmm0, xmm0
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.1:
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movntdq [rdx], xmm0
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lea rdx, [rdx + 16]
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loop .1
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mfence
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@SetQwords:
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jnc .2
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mov [rdx], r8
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.2:
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ret
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