michael@0: // -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0: // 
michael@0: // This Source Code Form is subject to the terms of the Mozilla Public
michael@0: // License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0: // file, You can obtain one at http://mozilla.org/MPL/2.0/.
michael@0: 
michael@0: .text
michael@0: 
michael@0: // PRInt32 _PR_ia64_AtomicIncrement(PRInt32 *val)
michael@0: //
michael@0: // Atomically increment the integer pointed to by 'val' and return
michael@0: // the result of the increment.
michael@0: //
michael@0:         .align 16
michael@0:         .global _PR_ia64_AtomicIncrement#
michael@0:         .proc _PR_ia64_AtomicIncrement#
michael@0: _PR_ia64_AtomicIncrement:
michael@0:         fetchadd4.acq r8 = [r32], 1  ;;
michael@0:         adds r8 = 1, r8
michael@0:         br.ret.sptk.many b0
michael@0:         .endp _PR_ia64_AtomicIncrement#
michael@0: 
michael@0: // PRInt32 _PR_ia64_AtomicDecrement(PRInt32 *val)
michael@0: //
michael@0: // Atomically decrement the integer pointed to by 'val' and return
michael@0: // the result of the decrement.
michael@0: //
michael@0:         .align 16
michael@0:         .global _PR_ia64_AtomicDecrement#
michael@0:         .proc _PR_ia64_AtomicDecrement#
michael@0: _PR_ia64_AtomicDecrement:
michael@0:         fetchadd4.rel r8 = [r32], -1  ;;
michael@0:         adds r8 = -1, r8
michael@0:         br.ret.sptk.many b0
michael@0:         .endp _PR_ia64_AtomicDecrement#
michael@0: 
michael@0: // PRInt32 _PR_ia64_AtomicAdd(PRInt32 *ptr, PRInt32 val)
michael@0: //
michael@0: // Atomically add 'val' to the integer pointed to by 'ptr'
michael@0: // and return the result of the addition.
michael@0: //
michael@0:         .align 16
michael@0:         .global _PR_ia64_AtomicAdd#
michael@0:         .proc _PR_ia64_AtomicAdd#
michael@0: _PR_ia64_AtomicAdd:
michael@0:         ld4 r15 = [r32]  ;;
michael@0: .L3:
michael@0:         mov r14 = r15
michael@0:         mov ar.ccv = r15
michael@0:         add r8 = r15, r33  ;;
michael@0:         cmpxchg4.acq r15 = [r32], r8, ar.ccv  ;;
michael@0:         cmp4.ne p6, p7 =  r15, r14
michael@0:         (p6) br.cond.dptk .L3
michael@0:         br.ret.sptk.many b0
michael@0:         .endp _PR_ia64_AtomicAdd#
michael@0: 
michael@0: // PRInt32 _PR_ia64_AtomicSet(PRInt32 *val, PRInt32 newval)
michael@0: //
michael@0: // Atomically set the integer pointed to by 'val' to the new
michael@0: // value 'newval' and return the old value.
michael@0: //
michael@0:         .align 16
michael@0:         .global _PR_ia64_AtomicSet#
michael@0:         .proc _PR_ia64_AtomicSet#
michael@0: _PR_ia64_AtomicSet:
michael@0:         xchg4 r8 = [r32], r33
michael@0:         br.ret.sptk.many b0
michael@0:         .endp _PR_ia64_AtomicSet#
michael@0: 
michael@0: // Magic indicating no need for an executable stack
michael@0: .section .note.GNU-stack, "", @progbits ; .previous