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