The reason I didn't remove the GCC version is because Liming told me that there is a XCODE issue which prevents using NASM for library.
Thanks/Ray > -----Original Message----- > From: Ni, Ruiyu > Sent: Tuesday, September 11, 2018 10:25 AM > To: Kinney, Michael D <michael.d.kin...@intel.com>; edk2- > de...@lists.01.org > Cc: Yao, Jiewen <jiewen....@intel.com>; Gao, Liming > <liming....@intel.com> > Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix > Interlocked[De|In]crement return value > > The NASM does the exactly same as the MSFT intrinsic. > I'd like to remove them because I was almost lost in so many versions of > Interlocked[De|In]crement. > I'd like to merge them to one version. > > Thanks/Ray > > > -----Original Message----- > > From: Kinney, Michael D > > Sent: Tuesday, September 11, 2018 12:39 AM > > To: Ni, Ruiyu <ruiyu...@intel.com>; edk2-devel@lists.01.org; Kinney, > > Michael D <michael.d.kin...@intel.com> > > Cc: Yao, Jiewen <jiewen....@intel.com>; Gao, Liming > > <liming....@intel.com> > > Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix > > Interlocked[De|In]crement return value > > > > Ray, > > > > Why are we removing the use of intrinsics from MSFT builds? We should > > keep those for more efficient code generation if the intrinsic has the > > correct behavior. > > > > Thanks, > > > > Mike > > > > > -----Original Message----- > > > From: Ni, Ruiyu > > > Sent: Monday, September 10, 2018 3:06 AM > > > To: edk2-devel@lists.01.org > > > Cc: Yao, Jiewen <jiewen....@intel.com>; Gao, Liming > > > <liming....@intel.com>; Kinney, Michael D > > > <michael.d.kin...@intel.com> > > > Subject: [PATCH] MdePkg/SynchronizationLib: fix > > > Interlocked[De|In]crement return value > > > > > > Today's InterlockedIncrement()/InterlockedDecrement() > > > guarantees to > > > perform atomic increment/decrement but doesn't guarantee the return > > > value equals to the new value. > > > > > > The patch fixes the behavior to use "XADD" instruction to guarantee > > > the return value equals to the new value. > > > > > > Contributed-under: TianoCore Contribution Agreement 1.1 > > > Signed-off-by: Ruiyu Ni <ruiyu...@intel.com> > > > Cc: Jiewen Yao <jiewen....@intel.com> > > > Cc: Liming Gao <liming....@intel.com> > > > Cc: Michael D Kinney <michael.d.kin...@intel.com> > > > --- > > > MdePkg/Include/Library/SynchronizationLib.h | 6 > > > +-- > > > .../BaseSynchronizationLib.inf | 18 > > > ++++----- > > > .../BaseSynchronizationLibInternals.h | 6 > > > +-- > > > .../BaseSynchronizationLib/Ia32/GccInline.c | 18 > > > ++++----- > > > .../Ia32/InterlockedDecrement.c | 42 > > > -------------------- > > > .../Ia32/InterlockedDecrement.nasm | 10 > > > ++--- > > > .../Ia32/InterlockedIncrement.c | 43 > > > -------------------- > > > .../Ia32/InterlockedIncrement.nasm | 7 > > > ++-- > > > .../BaseSynchronizationLib/Synchronization.c | 6 > > > +-- > > > .../BaseSynchronizationLib/SynchronizationGcc.c | 6 > > > +-- > > > .../BaseSynchronizationLib/SynchronizationMsc.c | 6 > > > +-- > > > .../Library/BaseSynchronizationLib/X64/GccInline.c | 19 > > > +++++---- > > > .../X64/InterlockedDecrement.c | 46 > > > ---------------------- > > > .../X64/InterlockedDecrement.nasm | 8 > > > ++-- > > > .../X64/InterlockedIncrement.c | 46 > > > ---------------------- > > > .../X64/InterlockedIncrement.nasm | 5 > > > ++- > > > 16 files changed, 52 insertions(+), 240 deletions(-) delete mode > > > 100644 MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDe > > > crement.c > > > delete mode 100644 > > > MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIn > > > crement.c > > > delete mode 100644 > > > MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDec > > > rement.c > > > delete mode 100644 > > > MdePkg/Library/BaseSynchronizationLib/X64/InterlockedInc > > > rement.c > > > > > > diff --git a/MdePkg/Include/Library/SynchronizationLib.h > > > b/MdePkg/Include/Library/SynchronizationLib.h > > > index da69f6ff5e..ce3bce04f5 100644 > > > --- a/MdePkg/Include/Library/SynchronizationLib.h > > > +++ b/MdePkg/Include/Library/SynchronizationLib.h > > > @@ -144,8 +144,7 @@ ReleaseSpinLock ( > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > If Value is NULL, then ASSERT(). > > > > > > @@ -166,8 +165,7 @@ InterlockedIncrement ( > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > If Value is NULL, then ASSERT(). > > > > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat > > > ionLib.inf > > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat > > > ionLib.inf > > > index 0be1d4331f..b971cd138d 100755 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat > > > ionLib.inf > > > +++ > > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat > > > ionLib.inf > > > @@ -34,9 +34,9 @@ [Sources.IA32] > > > Ia32/InterlockedCompareExchange64.c | MSFT > > > Ia32/InterlockedCompareExchange32.c | MSFT > > > Ia32/InterlockedCompareExchange16.c | MSFT > > > - Ia32/InterlockedDecrement.c | MSFT > > > - Ia32/InterlockedIncrement.c | MSFT > > > - SynchronizationMsc.c | MSFT > > > + Ia32/InterlockedDecrement.nasm | MSFT > > > + Ia32/InterlockedIncrement.nasm | MSFT SynchronizationMsc.c | MSFT > > > > > > Ia32/InterlockedCompareExchange64.nasm| INTEL > > > Ia32/InterlockedCompareExchange32.nasm| INTEL @@ -54,17 +54,15 > > @@ > > > [Sources.X64] > > > X64/InterlockedCompareExchange64.c | MSFT > > > X64/InterlockedCompareExchange32.c | MSFT > > > X64/InterlockedCompareExchange16.c | MSFT > > > + X64/InterlockedDecrement.nasm | MSFT > > X64/InterlockedIncrement.nasm > > > + | MSFT SynchronizationMsc.c | MSFT > > > > > > X64/InterlockedCompareExchange64.nasm| INTEL > > > X64/InterlockedCompareExchange32.nasm| INTEL > > > X64/InterlockedCompareExchange16.nasm| INTEL > > > - > > > - X64/InterlockedDecrement.c | MSFT > > > - X64/InterlockedIncrement.c | MSFT > > > - SynchronizationMsc.c | MSFT > > > - > > > - X64/InterlockedDecrement.nasm| INTEL > > > - X64/InterlockedIncrement.nasm| INTEL > > > + X64/InterlockedDecrement.nasm | INTEL > > > + X64/InterlockedIncrement.nasm | INTEL > > > Synchronization.c | INTEL > > > > > > Ia32/InternalGetSpinLockProperties.c | GCC diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat > > > ionLibInternals.h > > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat > > > ionLibInternals.h > > > index 37edd7c188..8c363a8585 100644 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat > > > ionLibInternals.h > > > +++ > > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat > > > ionLibInternals.h > > > @@ -27,8 +27,7 @@ > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > @param Value A pointer to the 32-bit value to increment. > > > > > > @@ -47,8 +46,7 @@ InternalSyncIncrement ( > > > > > > Performs an atomic decrement of the 32-bit unsigned integer > > > specified by > > > Value and returns the decrement value. The decrement operation > > > must be > > > - performed using MP safe mechanisms. The state of the return value > > > is not > > > - guaranteed to be MP safe. > > > + performed using MP safe mechanisms. > > > > > > @param Value A pointer to the 32-bit value to decrement. > > > > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c > > > index 4ab293f243..d82e0205f5 100644 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c > > > +++ > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c > > > @@ -20,8 +20,7 @@ > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > @param Value A pointer to the 32-bit value to increment. > > > > > > @@ -37,9 +36,10 @@ InternalSyncIncrement ( > > > UINT32 Result; > > > > > > __asm__ __volatile__ ( > > > + "movl $1, %%eax \n\t" > > > "lock \n\t" > > > - "incl %2 \n\t" > > > - "movl %2, %%eax " > > > + "xadd %%eax, %2 \n\t" > > > + "inc %%eax " > > > : "=a" (Result), // %0 > > > "=m" (*Value) // %1 > > > : "m" (*Value) // %2 > > > @@ -57,8 +57,7 @@ InternalSyncIncrement ( > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > @param Value A pointer to the 32-bit value to decrement. > > > > > > @@ -74,9 +73,10 @@ InternalSyncDecrement ( > > > UINT32 Result; > > > > > > __asm__ __volatile__ ( > > > - "lock \n\t" > > > - "decl %2 \n\t" > > > - "movl %2, %%eax " > > > + "movl $-1, %%eax \n\t" > > > + "lock \n\t" > > > + "xadd %%eax, %2 \n\t" > > > + "dec %%eax " > > > : "=a" (Result), // %0 > > > "=m" (*Value) // %1 > > > : "m" (*Value) // %2 > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Decrement.c > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Decrement.c > > > deleted file mode 100644 > > > index 354a0e7ab1..0000000000 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Decrement.c > > > +++ /dev/null > > > @@ -1,42 +0,0 @@ > > > -/** @file > > > - InterlockedDecrement function > > > - > > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights > > > reserved.<BR> > > > - 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 decrement of an 32-bit unsigned integer. > > > - > > > - Performs an atomic decrement of the 32-bit unsigned integer > > > specified by > > > - Value and returns the decrement 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 decrement value. > > > - > > > -**/ > > > -UINT32 > > > -EFIAPI > > > -InternalSyncDecrement ( > > > - IN volatile UINT32 *Value > > > - ) > > > -{ > > > - _asm { > > > - mov eax, Value > > > - lock dec dword ptr [eax] > > > - mov eax, [eax] > > > - } > > > -} > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Decrement.nasm > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Decrement.nasm > > > index 4c46041186..dd5a8de3ed 100644 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Decrement.nasm > > > +++ > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Decrement.nasm > > > @@ -1,6 +1,6 @@ > > > ;------------------------------------------------------ > > > ------------------------ > > > ; > > > -; Copyright (c) 2006 - 2016, Intel Corporation. All rights > > > reserved.<BR> > > > +; Copyright (c) 2006 - 2018, Intel Corporation. All > > > rights reserved.<BR> > > > ; 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 @@ -32,8 +32,8 @@ > > > ;------------------------------------------------------ > > > ------------------------ > > > global ASM_PFX(InternalSyncDecrement) > > > ASM_PFX(InternalSyncDecrement): > > > - mov eax, [esp + 4] > > > - lock dec dword [eax] > > > - mov eax, [eax] > > > + mov ecx, [esp + 4] > > > + mov eax, 0FFFFFFFFh > > > + lock xadd dword [ecx], eax > > > + dec eax > > > ret > > > - > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Increment.c > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Increment.c > > > deleted file mode 100644 > > > index c61a550119..0000000000 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Increment.c > > > +++ /dev/null > > > @@ -1,43 +0,0 @@ > > > -/** @file > > > - InterLockedIncrement function > > > - > > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights > > > reserved.<BR> > > > - 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 > > > - ) > > > -{ > > > - _asm { > > > - mov eax, Value > > > - lock inc dword ptr [eax] > > > - mov eax, [eax] > > > - } > > > -} > > > - > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Increment.nasm > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Increment.nasm > > > index 3902c73275..0677e4bf78 100644 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Increment.nasm > > > +++ > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked > > > Increment.nasm > > > @@ -32,8 +32,9 @@ > > > ;------------------------------------------------------ > > > ------------------------ > > > global ASM_PFX(InternalSyncIncrement) > > > ASM_PFX(InternalSyncIncrement): > > > - mov eax, [esp + 4] > > > - lock inc dword [eax] > > > - mov eax, [eax] > > > + mov ecx, [esp + 4] > > > + mov eax, 1 > > > + lock xadd dword [ecx], eax > > > + inc eax > > > ret > > > > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/Synchronization. > > > c > > > b/MdePkg/Library/BaseSynchronizationLib/Synchronization. > > > c > > > index 76c5a1275c..0ab59ca702 100644 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/Synchronization. > > > c > > > +++ > > > b/MdePkg/Library/BaseSynchronizationLib/Synchronization. > > > c > > > @@ -231,8 +231,7 @@ ReleaseSpinLock ( > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > If Value is NULL, then ASSERT(). > > > > > > @@ -256,8 +255,7 @@ InterlockedIncrement ( > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > If Value is NULL, then ASSERT(). > > > > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG > > > cc.c > > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG > > > cc.c > > > index 5ac548b19f..177739d3da 100644 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG > > > cc.c > > > +++ > > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG > > > cc.c > > > @@ -247,8 +247,7 @@ ReleaseSpinLock ( > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > If Value is NULL, then ASSERT(). > > > > > > @@ -272,8 +271,7 @@ InterlockedIncrement ( > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > If Value is NULL, then ASSERT(). > > > > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM > > > sc.c > > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM > > > sc.c > > > index e3298c8ab4..6ab2d71870 100644 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM > > > sc.c > > > +++ > > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM > > > sc.c > > > @@ -249,8 +249,7 @@ ReleaseSpinLock ( > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > If Value is NULL, then ASSERT(). > > > > > > @@ -274,8 +273,7 @@ InterlockedIncrement ( > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > If Value is NULL, then ASSERT(). > > > > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c > > > b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c > > > index 5224dd063f..4c4d6e3fc7 100644 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c > > > +++ > > > b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c > > > @@ -15,14 +15,12 @@ > > > > > > > > > > > > - > > > /** > > > 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. > > > + performed using MP safe mechanisms. > > > > > > @param Value A pointer to the 32-bit value to increment. > > > > > > @@ -38,9 +36,10 @@ InternalSyncIncrement ( > > > UINT32 Result; > > > > > > __asm__ __volatile__ ( > > > + "movl $1, %%eax \n\t" > > > "lock \n\t" > > > - "incl %2 \n\t" > > > - "mov %2, %%eax " > > > + "xadd %%eax, %2 \n\t" > > > + "inc %%eax " > > > : "=a" (Result), // %0 > > > "=m" (*Value) // %1 > > > : "m" (*Value) // %2 > > > @@ -57,8 +56,7 @@ InternalSyncIncrement ( > > > > > > 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. > > > + performed using MP safe mechanisms. > > > > > > @param Value A pointer to the 32-bit value to decrement. > > > > > > @@ -74,9 +72,10 @@ InternalSyncDecrement ( > > > UINT32 Result; > > > > > > __asm__ __volatile__ ( > > > - "lock \n\t" > > > - "decl %2 \n\t" > > > - "mov %2, %%eax " > > > + "movl $-1, %%eax \n\t" > > > + "lock \n\t" > > > + "xadd %%eax, %2 \n\t" > > > + "dec %%eax " > > > : "=a" (Result), // %0 > > > "=m" (*Value) // %1 > > > : "m" (*Value) // %2 > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD > > > ecrement.c > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD > > > ecrement.c > > > deleted file mode 100644 > > > index da402cd4c6..0000000000 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD > > > ecrement.c > > > +++ /dev/null > > > @@ -1,46 +0,0 @@ > > > -/** @file > > > - InterlockedDecrement function > > > - > > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights > > > reserved.<BR> > > > - 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. > > > - > > > -**/ > > > - > > > -/** > > > - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics. > > > -**/ > > > - > > > -long _InterlockedDecrement( > > > - long * lpAddend > > > -); > > > - > > > -#pragma intrinsic(_InterlockedDecrement) > > > - > > > -/** > > > - 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 decrement 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 decrement value. > > > - > > > -**/ > > > -UINT32 > > > -EFIAPI > > > -InternalSyncDecrement ( > > > - IN volatile UINT32 *Value > > > - ) > > > -{ > > > - return _InterlockedDecrement ((long *)(UINTN)(Value)); -} > > > - > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD > > > ecrement.nasm > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD > > > ecrement.nasm > > > index 60f43111fe..dabdca945e 100644 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD > > > ecrement.nasm > > > +++ > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD > > > ecrement.nasm > > > @@ -1,6 +1,6 @@ > > > ;------------------------------------------------------ > > > ------------------------ > > > ; > > > -; Copyright (c) 2006 - 2016, Intel Corporation. All rights > > > reserved.<BR> > > > +; Copyright (c) 2006 - 2018, Intel Corporation. All > > > rights reserved.<BR> > > > ; 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 @@ -33,7 +33,7 @@ > > > ;------------------------------------------------------ > > > ------------------------ > > > global ASM_PFX(InternalSyncDecrement) > > > ASM_PFX(InternalSyncDecrement): > > > - lock dec dword [rcx] > > > - mov eax, [rcx] > > > + mov eax, 0FFFFFFFFh > > > + lock xadd dword [rcx], eax > > > + dec eax > > > ret > > > - > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI > > > ncrement.c > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI > > > ncrement.c > > > deleted file mode 100644 > > > index bbd1384602..0000000000 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI > > > ncrement.c > > > +++ /dev/null > > > @@ -1,46 +0,0 @@ > > > -/** @file > > > - InterLockedIncrement function > > > - > > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights > > > reserved.<BR> > > > - 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. > > > - > > > -**/ > > > - > > > -/** > > > - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics. > > > -**/ > > > - > > > -long _InterlockedIncrement( > > > - long * lpAddend > > > -); > > > - > > > -#pragma intrinsic(_InterlockedIncrement) > > > - > > > -/** > > > - 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 > > > - ) > > > -{ > > > - return _InterlockedIncrement ((long *)(UINTN)(Value)); -} > > > - > > > diff --git > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI > > > ncrement.nasm > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI > > > ncrement.nasm > > > index 7f877b5774..77379d998e 100644 > > > --- > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI > > > ncrement.nasm > > > +++ > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI > > > ncrement.nasm > > > @@ -33,7 +33,8 @@ > > > ;------------------------------------------------------ > > > ------------------------ > > > global ASM_PFX(InternalSyncIncrement) > > > ASM_PFX(InternalSyncIncrement): > > > - lock inc dword [rcx] > > > - mov eax, [rcx] > > > + mov eax, 1 > > > + lock xadd dword [rcx], eax > > > + inc eax > > > ret > > > > > > -- > > > 2.16.1.windows.1 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
