diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Ia32/DivS64x64Remainder.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Ia32/DivS64x64Remainder.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Ia32/DivS64x64Remainder.c b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Ia32/DivS64x64Remainder.c new file mode 100644 index 00000000..88a7ae91 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Ia32/DivS64x64Remainder.c @@ -0,0 +1,47 @@ +/** @file + Integer division worker functions for Ia32. + + Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include "BaseLibInternals.h" + +/** + Worker function that Divides a 64-bit signed integer by a 64-bit signed integer and + generates a 64-bit signed result and a optional 64-bit signed remainder. + + This function divides the 64-bit signed value Dividend by the 64-bit + signed value Divisor and generates a 64-bit signed quotient. If Remainder + is not NULL, then the 64-bit signed remainder is returned in Remainder. + This function returns the 64-bit signed quotient. + + @param Dividend A 64-bit signed value. + @param Divisor A 64-bit signed value. + @param Remainder A pointer to a 64-bit signed value. This parameter is + optional and may be NULL. + + @return Dividend / Divisor + +**/ +INT64 +EFIAPI +InternalMathDivRemS64x64 ( + IN INT64 Dividend, + IN INT64 Divisor, + OUT INT64 *Remainder OPTIONAL + ) +{ + INT64 Quot; + + Quot = InternalMathDivRemU64x64 ( + (UINT64) (Dividend >= 0 ? Dividend : -Dividend), + (UINT64) (Divisor >= 0 ? Divisor : -Divisor), + (UINT64 *) Remainder + ); + if (Remainder != NULL && Dividend < 0) { + *Remainder = -*Remainder; + } + return (Dividend ^ Divisor) >= 0 ? Quot : -Quot; +} |