diff options
Diffstat (limited to 'MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c')
-rw-r--r-- | MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c deleted file mode 100644 index 9b939c9709..0000000000 --- a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c +++ /dev/null @@ -1,193 +0,0 @@ -/** @file
- GCC inline implementation of BaseSynchronizationLib processor specific functions.
-
- Copyright (c) 2006 - 2009, Intel Corporation<BR>
- Portions copyright (c) 2008-2009 Apple Inc. All rights reserved.<BR>
- All rights reserved. This program and the accompanying materials
- are licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-
-
-/**
- Performs an atomic increment of an 32-bit unsigned integer.
-
- Performs an atomic increment of the 32-bit unsigned integer specified by
- Value and returns the incremented value. The increment operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
-
- @param Value A pointer to the 32-bit value to increment.
-
- @return The incremented value.
-
-**/
-UINT32
-EFIAPI
-InternalSyncIncrement (
- IN volatile UINT32 *Value
- )
-{
- UINT32 Result;
-
- __asm__ __volatile__ (
- "lock \n\t"
- "incl %2 \n\t"
- "movl %2, %%eax "
- : "=a" (Result), // %0
- "=m" (*Value) // %1
- : "m" (*Value) // %2
- : "memory",
- "cc"
- );
-
- return Result;
-
-}
-
-
-/**
- Performs an atomic decrement of an 32-bit unsigned integer.
-
- Performs an atomic decrement of the 32-bit unsigned integer specified by
- Value and returns the decremented value. The decrement operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
-
- @param Value A pointer to the 32-bit value to decrement.
-
- @return The decremented value.
-
-**/
-UINT32
-EFIAPI
-InternalSyncDecrement (
- IN volatile UINT32 *Value
- )
-{
- UINT32 Result;
-
- __asm__ __volatile__ (
- "lock \n\t"
- "decl %2 \n\t"
- "movl %2, %%eax "
- : "=a" (Result), // %0
- "=m" (*Value) // %1
- : "m" (*Value) // %2
- : "memory",
- "cc"
- );
-
- return Result;
-}
-
-/**
- Performs an atomic compare exchange operation on a 32-bit unsigned integer.
-
- Performs an atomic compare exchange operation on the 32-bit unsigned integer
- specified by Value. If Value is equal to CompareValue, then Value is set to
- ExchangeValue and CompareValue is returned. If Value is not equal to CompareValue,
- then Value is returned. The compare exchange operation must be performed using
- MP safe mechanisms.
-
-
- @param Value A pointer to the 32-bit value for the compare exchange
- operation.
- @param CompareValue 32-bit value used in compare operation.
- @param ExchangeValue 32-bit value used in exchange operation.
-
- @return The original *Value before exchange.
-
-**/
-UINT32
-EFIAPI
-InternalSyncCompareExchange32 (
- IN OUT volatile UINT32 *Value,
- IN UINT32 CompareValue,
- IN UINT32 ExchangeValue
- )
-{
-
-// GCC 4.1 and forward supports atomic builtins
-#if ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 1)))
-
- return __sync_val_compare_and_swap (Value, CompareValue, ExchangeValue);
-
-#else
-
- __asm__ __volatile__ (
- " \n\t"
- "lock \n\t"
- "cmpxchgl %1, %2 \n\t"
- : "=a" (CompareValue) // %0
- : "q" (ExchangeValue), // %1
- "m" (*Value), // %2
- "0" (CompareValue) // %4
- : "memory",
- "cc"
- );
-
- return CompareValue;
-
-#endif
-}
-
-/**
- Performs an atomic compare exchange operation on a 64-bit unsigned integer.
-
- Performs an atomic compare exchange operation on the 64-bit unsigned integer specified
- by Value. If Value is equal to CompareValue, then Value is set to ExchangeValue and
- CompareValue is returned. If Value is not equal to CompareValue, then Value is returned.
- The compare exchange operation must be performed using MP safe mechanisms.
-
-
- @param Value A pointer to the 64-bit value for the compare exchange
- operation.
- @param CompareValue 64-bit value used in compare operation.
- @param ExchangeValue 64-bit value used in exchange operation.
-
- @return The original *Value before exchange.
-
-**/
-UINT64
-EFIAPI
-InternalSyncCompareExchange64 (
- IN OUT volatile UINT64 *Value,
- IN UINT64 CompareValue,
- IN UINT64 ExchangeValue
- )
-{
-// GCC 4.1 and forward supports atomic builtins
-#if ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 1)))
-
- return __sync_val_compare_and_swap (Value, CompareValue, ExchangeValue);
-
-#else
-
- __asm__ __volatile__ (
- " \n\t"
- "push %%ebx \n\t"
- "movl %2,%%ebx \n\t"
- "lock \n\t"
- "cmpxchg8b (%1) \n\t"
- "pop %%ebx \n\t"
- : "+A" (CompareValue) // %0
- : "S" (Value), // %1
- "r" ((UINT32) ExchangeValue), // %2
- "c" ((UINT32) (ExchangeValue >> 32)) // %3
- : "memory",
- "cc"
- );
-
- return CompareValue;
-
-#endif
-}
-
-
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