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https://github.com/CloverHackyColor/CloverBootloader.git
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43 lines
1.4 KiB
NASM
43 lines
1.4 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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; DivError.asm
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;
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; Abstract:
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;
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; Set error flag for all division functions
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;
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;------------------------------------------------------------------------------
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SECTION .text
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;------------------------------------------------------------------------------
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; UINT64
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; EFIAPI
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; InternalMathDivRemU64x32 (
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; IN UINT64 Dividend,
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; IN UINT32 Divisor,
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; OUT UINT32 *Remainder
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(InternalMathDivRemU64x32)
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ASM_PFX(InternalMathDivRemU64x32):
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mov ecx, [esp + 12] ; ecx <- divisor
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mov eax, [esp + 8] ; eax <- dividend[32..63]
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xor edx, edx
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div ecx ; eax <- quotient[32..63], edx <- remainder
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push eax
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mov eax, [esp + 8] ; eax <- dividend[0..31]
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div ecx ; eax <- quotient[0..31]
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mov ecx, [esp + 20] ; ecx <- Remainder
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jecxz .0 ; abandon remainder if Remainder == NULL
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mov [ecx], edx
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.0:
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pop edx ; edx <- quotient[32..63]
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ret
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