+++ /dev/null
-/** @file\r
- Leaf math worker functions that require 64-bit arithmetic support from the\r
- compiler.\r
-\r
- Copyright (c) 2006, Intel Corporation<BR>\r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
- Module Name: Math64.c\r
-\r
-**/\r
-\r
-#include "BaseLibInternals.h"\r
-\r
-/**\r
- Shifts a 64-bit integer left between 0 and 63 bits. The low bits\r
- are filled with zeros. The shifted value is returned.\r
-\r
- This function shifts the 64-bit value Operand to the left by Count bits. The\r
- low Count bits are set to zero. The shifted value is returned.\r
-\r
- @param Operand The 64-bit operand to shift left.\r
- @param Count The number of bits to shift left.\r
-\r
- @return Operand << Count\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-InternalMathLShiftU64 (\r
- IN UINT64 Operand,\r
- IN UINTN Count\r
- )\r
-{\r
- return Operand << Count;\r
-}\r
-\r
-/**\r
- Shifts a 64-bit integer right between 0 and 63 bits. This high bits\r
- are filled with zeros. The shifted value is returned.\r
-\r
- This function shifts the 64-bit value Operand to the right by Count bits. The\r
- high Count bits are set to zero. The shifted value is returned.\r
-\r
- @param Operand The 64-bit operand to shift right.\r
- @param Count The number of bits to shift right.\r
-\r
- @return Operand >> Count\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-InternalMathRShiftU64 (\r
- IN UINT64 Operand,\r
- IN UINTN Count\r
- )\r
-{\r
- return Operand >> Count;\r
-}\r
-\r
-/**\r
- Shifts a 64-bit integer right between 0 and 63 bits. The high bits\r
- are filled with original integer's bit 63. The shifted value is returned.\r
-\r
- This function shifts the 64-bit value Operand to the right by Count bits. The\r
- high Count bits are set to bit 63 of Operand. The shifted value is returned.\r
-\r
- If Count is greater than 63, then ASSERT().\r
-\r
- @param Operand The 64-bit operand to shift right.\r
- @param Count The number of bits to shift right.\r
-\r
- @return Operand arithmetically shifted right by Count\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-InternalMathARShiftU64 (\r
- IN UINT64 Operand,\r
- IN UINTN Count\r
- )\r
-{\r
- INTN TestValue;\r
-\r
- //\r
- // Test if this compiler supports arithmetic shift\r
- //\r
- TestValue = (((-1) << (sizeof (-1) * 8 - 1)) >> (sizeof (-1) * 8 - 1));\r
- if (TestValue == -1) {\r
- //\r
- // Arithmetic shift is supported\r
- //\r
- return (UINT64)((INT64)Operand >> Count);\r
- }\r
-\r
- //\r
- // Arithmetic is not supported\r
- //\r
- return (Operand >> Count) |\r
- ((INTN)Operand < 0 ? ~((UINTN)-1 >> Count) : 0);\r
-}\r
-\r
-\r
-/**\r
- Rotates a 64-bit integer left between 0 and 63 bits, filling\r
- the low bits with the high bits that were rotated.\r
-\r
- This function rotates the 64-bit value Operand to the left by Count bits. The\r
- low Count bits are fill with the high Count bits of Operand. The rotated\r
- value is returned.\r
-\r
- @param Operand The 64-bit operand to rotate left.\r
- @param Count The number of bits to rotate left.\r
-\r
- @return Operand <<< Count\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-InternalMathLRotU64 (\r
- IN UINT64 Operand,\r
- IN UINTN Count\r
- )\r
-{\r
- return (Operand << Count) | (Operand >> (64 - Count));\r
-}\r
-\r
-/**\r
- Rotates a 64-bit integer right between 0 and 63 bits, filling\r
- the high bits with the high low bits that were rotated.\r
-\r
- This function rotates the 64-bit value Operand to the right by Count bits.\r
- The high Count bits are fill with the low Count bits of Operand. The rotated\r
- value is returned.\r
-\r
- @param Operand The 64-bit operand to rotate right.\r
- @param Count The number of bits to rotate right.\r
-\r
- @return Operand >>> Count\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-InternalMathRRotU64 (\r
- IN UINT64 Operand,\r
- IN UINTN Count\r
- )\r
-{\r
- return (Operand >> Count) | (Operand << (64 - Count));\r
-}\r
-\r
-/**\r
- Switches the endianess of a 64-bit integer.\r
-\r
- This function swaps the bytes in a 64-bit unsigned value to switch the value\r
- from little endian to big endian or vice versa. The byte swapped value is\r
- returned.\r
-\r
- @param Operand A 64-bit unsigned value.\r
-\r
- @return The byte swaped Operand.\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-InternalMathSwapBytes64 (\r
- IN UINT64 Operand\r
- )\r
-{\r
- UINT64 LowerBytes;\r
- UINT64 HigherBytes;\r
-\r
- LowerBytes = (UINT64) SwapBytes32 ((UINT32) Operand);\r
- HigherBytes = (UINT64) SwapBytes32 ((UINT32) (Operand >> 32));\r
-\r
- return (LowerBytes << 32 | HigherBytes);\r
-}\r
-\r
-/**\r
- Multiples a 64-bit unsigned integer by a 32-bit unsigned integer\r
- and generates a 64-bit unsigned result.\r
-\r
- This function multiples the 64-bit unsigned value Multiplicand by the 32-bit\r
- unsigned value Multiplier and generates a 64-bit unsigned result. This 64-\r
- bit unsigned result is returned.\r
-\r
- @param Multiplicand A 64-bit unsigned value.\r
- @param Multiplier A 32-bit unsigned value.\r
-\r
- @return Multiplicand * Multiplier\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-InternalMathMultU64x32 (\r
- IN UINT64 Multiplicand,\r
- IN UINT32 Multiplier\r
- )\r
-{\r
- return Multiplicand * Multiplier;\r
-}\r
-\r
-\r
-/**\r
- Multiples a 64-bit unsigned integer by a 64-bit unsigned integer\r
- and generates a 64-bit unsigned result.\r
-\r
- This function multiples the 64-bit unsigned value Multiplicand by the 64-bit\r
- unsigned value Multiplier and generates a 64-bit unsigned result. This 64-\r
- bit unsigned result is returned.\r
-\r
- @param Multiplicand A 64-bit unsigned value.\r
- @param Multiplier A 64-bit unsigned value.\r
-\r
- @return Multiplicand * Multiplier\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-InternalMathMultU64x64 (\r
- IN UINT64 Multiplicand,\r
- IN UINT64 Multiplier\r
- )\r
-{\r
- return Multiplicand * Multiplier;\r
-}\r
-\r
-/**\r
- Divides a 64-bit unsigned integer by a 32-bit unsigned integer and\r
- generates a 64-bit unsigned result.\r
-\r
- This function divides the 64-bit unsigned value Dividend by the 32-bit\r
- unsigned value Divisor and generates a 64-bit unsigned quotient. This\r
- function returns the 64-bit unsigned quotient.\r
-\r
- @param Dividend A 64-bit unsigned value.\r
- @param Divisor A 32-bit unsigned value.\r
-\r
- @return Dividend / Divisor\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-InternalMathDivU64x32 (\r
- IN UINT64 Dividend,\r
- IN UINT32 Divisor\r
- )\r
-{\r
- return Dividend / Divisor;\r
-}\r
-\r
-/**\r
- Divides a 64-bit unsigned integer by a 32-bit unsigned integer\r
- and generates a 32-bit unsigned remainder.\r
-\r
- This function divides the 64-bit unsigned value Dividend by the 32-bit\r
- unsigned value Divisor and generates a 32-bit remainder. This function\r
- returns the 32-bit unsigned remainder.\r
-\r
- @param Dividend A 64-bit unsigned value.\r
- @param Divisor A 32-bit unsigned value.\r
-\r
- @return Dividend % Divisor\r
-\r
-**/\r
-UINT32\r
-EFIAPI\r
-InternalMathModU64x32 (\r
- IN UINT64 Dividend,\r
- IN UINT32 Divisor\r
- )\r
-{\r
- return (UINT32)(Dividend % Divisor);\r
-}\r
-\r
-/**\r
- Divides a 64-bit unsigned integer by a 32-bit unsigned integer and\r
- generates a 64-bit unsigned result and an optional 32-bit unsigned remainder.\r
-\r
- This function divides the 64-bit unsigned value Dividend by the 32-bit\r
- unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder\r
- is not NULL, then the 32-bit unsigned remainder is returned in Remainder.\r
- This function returns the 64-bit unsigned quotient.\r
-\r
- @param Dividend A 64-bit unsigned value.\r
- @param Divisor A 32-bit unsigned value.\r
- @param Remainder A pointer to a 32-bit unsigned value. This parameter is\r
- optional and may be NULL.\r
-\r
- @return Dividend / Divisor\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-InternalMathDivRemU64x32 (\r
- IN UINT64 Dividend,\r
- IN UINT32 Divisor,\r
- OUT UINT32 *Remainder OPTIONAL\r
- )\r
-{\r
- if (Remainder != NULL) {\r
- *Remainder = (UINT32)(Dividend % Divisor);\r
- }\r
- return Dividend / Divisor;\r
-}\r
-\r
-/**\r
- Divides a 64-bit unsigned integer by a 64-bit unsigned integer and\r
- generates a 64-bit unsigned result and an optional 64-bit unsigned remainder.\r
-\r
- This function divides the 64-bit unsigned value Dividend by the 64-bit\r
- unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder\r
- is not NULL, then the 64-bit unsigned remainder is returned in Remainder.\r
- This function returns the 64-bit unsigned quotient.\r
-\r
- @param Dividend A 64-bit unsigned value.\r
- @param Divisor A 64-bit unsigned value.\r
- @param Remainder A pointer to a 64-bit unsigned value. This parameter is\r
- optional and may be NULL.\r
-\r
- @return Dividend / Divisor\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-InternalMathDivRemU64x64 (\r
- IN UINT64 Dividend,\r
- IN UINT64 Divisor,\r
- OUT UINT64 *Remainder OPTIONAL\r
- )\r
-{\r
- if (Remainder != NULL) {\r
- *Remainder = Dividend % Divisor;\r
- }\r
- return Dividend / Divisor;\r
-}\r
-\r
-/**\r
- Divides a 64-bit signed integer by a 64-bit signed integer and\r
- generates a 64-bit signed result and a optional 64-bit signed remainder.\r
-\r
- This function divides the 64-bit unsigned value Dividend by the 64-bit\r
- unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder\r
- is not NULL, then the 64-bit unsigned remainder is returned in Remainder.\r
- This function returns the 64-bit unsigned quotient.\r
-\r
- @param Dividend A 64-bit signed value.\r
- @param Divisor A 64-bit signed value.\r
- @param Remainder A pointer to a 64-bit signed value. This parameter is\r
- optional and may be NULL.\r
-\r
- @return Dividend / Divisor\r
-\r
-**/\r
-INT64\r
-InternalMathDivRemS64x64 (\r
- IN INT64 Dividend,\r
- IN INT64 Divisor,\r
- OUT INT64 *Remainder OPTIONAL\r
- )\r
-{\r
- if (Remainder != NULL) {\r
- *Remainder = Dividend % Divisor;\r
- }\r
- return Dividend / Divisor;\r
-}\r
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