| // Copyright 2014 Bloomberg Finance LP. All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Bloomberg Finance LP. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| // This file is an internal atomic implementation, use atomicops.h instead. |
| |
| #ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_AIX_H_ |
| #define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_AIX_H_ |
| |
| namespace google { |
| namespace protobuf { |
| namespace internal { |
| |
| inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, |
| Atomic32 old_value, |
| Atomic32 new_value) { |
| Atomic32 result; |
| |
| asm volatile ( |
| "1: lwarx %[res], %[zero], %[obj] \n\t" // load and reserve |
| " cmpw %[cmp], %[res] \n\t" // compare values |
| " bne- 2f \n\t" |
| " stwcx. %[val], %[zero], %[obj] \n\t" // store new value |
| " bne- 1b \n\t" |
| "2: \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [cmp] "b" (old_value), |
| [val] "b" (new_value), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr, |
| Atomic32 new_value) { |
| Atomic32 result; |
| |
| asm volatile ( |
| "1: lwarx %[res], %[zero], %[obj] \n\t" |
| " stwcx. %[val], %[zero], %[obj] \n\t" |
| " bne- 1b \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [val] "b" (new_value), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr, |
| Atomic32 increment) { |
| Atomic32 result; |
| |
| asm volatile ( |
| "1: lwarx %[res], %[zero], %[obj] \n\t" // load and reserve |
| " add %[res], %[val], %[res] \n\t" // add the operand |
| " stwcx. %[res], %[zero], %[obj] \n\t" // store old value |
| // if still reserved |
| " bne- 1b \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [val] "b" (increment), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline void MemoryBarrier(void) { |
| asm volatile ( |
| " lwsync \n\t" |
| " isync \n\t" |
| : |
| : |
| : "memory"); |
| } |
| |
| inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr, |
| Atomic32 increment) { |
| Atomic32 result; |
| |
| asm volatile ( |
| " lwsync \n\t" |
| |
| "1: lwarx %[res], %[zero], %[obj] \n\t" // load and reserve |
| " add %[res], %[val], %[res] \n\t" // add the operand |
| " stwcx. %[res], %[zero], %[obj] \n\t" // store old value |
| // if still reserved |
| " bne- 1b \n\t" |
| " isync \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [val] "b" (increment), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, |
| Atomic32 old_value, |
| Atomic32 new_value) { |
| Atomic32 result; |
| |
| asm volatile ( |
| "1: lwarx %[res], %[zero], %[obj] \n\t" // load and reserve |
| " cmpw %[cmp], %[res] \n\t" // compare values |
| " bne- 2f \n\t" |
| " stwcx. %[val], %[zero], %[obj] \n\t" // store new value |
| " bne- 1b \n\t" |
| |
| " isync \n\t" |
| "2: \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [cmp] "b" (old_value), |
| [val] "b" (new_value), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, |
| Atomic32 old_value, |
| Atomic32 new_value) { |
| Atomic32 result; |
| |
| asm volatile ( |
| " lwsync \n\t" |
| |
| "1: lwarx %[res], %[zero], %[obj] \n\t" // load and reserve |
| " cmpw %[cmp], %[res] \n\t" // compare values |
| " bne- 2f \n\t" |
| " stwcx. %[val], %[zero], %[obj] \n\t" // store new value |
| " bne- 1b \n\t" |
| |
| "2: \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [cmp] "b" (old_value), |
| [val] "b" (new_value), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) { |
| *ptr = value; |
| } |
| |
| inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) { |
| asm volatile ( |
| " stw %[val], %[obj] \n\t" |
| " isync \n\t" |
| : [obj] "=m" (*ptr) |
| : [val] "b" (value)); |
| } |
| |
| inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) { |
| asm volatile ( |
| " lwsync \n\t" |
| " stw %[val], %[obj] \n\t" |
| : [obj] "=m" (*ptr) |
| : [val] "b" (value)); |
| } |
| |
| inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) { |
| return *ptr; |
| } |
| |
| inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) { |
| Atomic32 result; |
| |
| asm volatile ( |
| "1: lwz %[res], %[obj] \n\t" |
| " cmpw %[res], %[res] \n\t" // create data |
| // dependency for |
| // load/load ordering |
| " bne- 1b \n\t" // never taken |
| |
| " isync \n\t" |
| : [res] "=b" (result) |
| : [obj] "m" (*ptr), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline Atomic32 Release_Load(volatile const Atomic32* ptr) { |
| Atomic32 result; |
| |
| asm volatile ( |
| " lwsync \n\t" |
| |
| "1: lwz %[res], %[obj] \n\t" |
| " cmpw %[res], %[res] \n\t" // create data |
| // dependency for |
| // load/load ordering |
| " bne- 1b \n\t" // never taken |
| : [res] "=b" (result) |
| : [obj] "m" (*ptr), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| #ifdef GOOGLE_PROTOBUF_ARCH_64_BIT |
| inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr, |
| Atomic64 old_value, |
| Atomic64 new_value) { |
| Atomic64 result; |
| |
| asm volatile ( |
| "1: ldarx %[res], %[zero], %[obj] \n\t" // load and reserve |
| " cmpd %[cmp], %[res] \n\t" // compare values |
| " bne- 2f \n\t" |
| |
| " stdcx. %[val], %[zero], %[obj] \n\t" // store the new value |
| " bne- 1b \n\t" |
| "2: \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [cmp] "b" (old_value), |
| [val] "b" (new_value), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr, |
| Atomic64 new_value) { |
| Atomic64 result; |
| |
| asm volatile ( |
| "1: ldarx %[res], %[zero], %[obj] \n\t" |
| " stdcx. %[val], %[zero], %[obj] \n\t" |
| " bne- 1b \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [val] "b" (new_value), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr, |
| Atomic64 increment) { |
| Atomic64 result; |
| |
| asm volatile ( |
| "1: ldarx %[res], %[zero], %[obj] \n\t" // load and reserve |
| " add %[res], %[res], %[val] \n\t" // add the operand |
| " stdcx. %[res], %[zero], %[obj] \n\t" // store old value if |
| // still reserved |
| |
| " bne- 1b \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [val] "b" (increment), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr, |
| Atomic64 increment) { |
| |
| Atomic64 result; |
| |
| asm volatile ( |
| " lwsync \n\t" |
| |
| "1: ldarx %[res], %[zero], %[obj] \n\t" // load and reserve |
| " add %[res], %[res], %[val] \n\t" // add the operand |
| " stdcx. %[res], %[zero], %[obj] \n\t" // store old value if |
| // still reserved |
| |
| " bne- 1b \n\t" |
| |
| " isync \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [val] "b" (increment), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr, |
| Atomic64 old_value, |
| Atomic64 new_value) { |
| Atomic64 result; |
| |
| asm volatile ( |
| "1: ldarx %[res], %[zero], %[obj] \n\t" // load and reserve |
| " cmpd %[cmp], %[res] \n\t" // compare values |
| " bne- 2f \n\t" |
| |
| " stdcx. %[val], %[zero], %[obj] \n\t" // store the new value |
| " bne- 1b \n\t" |
| " isync \n\t" |
| "2: \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [cmp] "b" (old_value), |
| [val] "b" (new_value), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr, |
| Atomic64 old_value, |
| Atomic64 new_value) { |
| Atomic64 result; |
| |
| asm volatile ( |
| " lwsync \n\t" |
| |
| "1: ldarx %[res], %[zero], %[obj] \n\t" // load and reserve |
| " cmpd %[cmp], %[res] \n\t" // compare values |
| " bne- 2f \n\t" |
| |
| " stdcx. %[val], %[zero], %[obj] \n\t" // store the new value |
| " bne- 1b \n\t" |
| "2: \n\t" |
| : [res] "=&b" (result) |
| : [obj] "b" (ptr), |
| [cmp] "b" (old_value), |
| [val] "b" (new_value), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) { |
| *ptr = value; |
| } |
| |
| inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) { |
| asm volatile ( |
| " std %[val], %[obj] \n\t" |
| " isync \n\t" |
| : [obj] "=m" (*ptr) |
| : [val] "b" (value)); |
| } |
| |
| inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) { |
| asm volatile ( |
| " lwsync \n\t" |
| " std %[val], %[obj] \n\t" |
| : [obj] "=m" (*ptr) |
| : [val] "b" (value)); |
| } |
| |
| inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) { |
| return *ptr; |
| } |
| |
| inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) { |
| Atomic64 result; |
| |
| asm volatile ( |
| "1: ld %[res], %[obj] \n\t" |
| " cmpd %[res], %[res] \n\t" // create data |
| // dependency for |
| // load/load ordering |
| " bne- 1b \n\t" // never taken |
| |
| " isync \n\t" |
| : [res] "=b" (result) |
| : [obj] "m" (*ptr), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| |
| inline Atomic64 Release_Load(volatile const Atomic64* ptr) { |
| Atomic64 result; |
| |
| asm volatile ( |
| " lwsync \n\t" |
| |
| "1: ld %[res], %[obj] \n\t" |
| " cmpd %[res], %[res] \n\t" // create data |
| // dependency for |
| // load/load ordering |
| " bne- 1b \n\t" // never taken |
| : [res] "=b" (result) |
| : [obj] "m" (*ptr), |
| [zero] "i" (0) |
| : "cr0", "ctr"); |
| |
| return result; |
| } |
| #endif |
| |
| } // namespace internal |
| } // namespace protobuf |
| } // namespace google |
| |
| #endif // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_SPARC_GCC_H_ |
