Source code of Windows XP (NT5)
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/***** Copyright (C) 1996-97 Intel Corporation. All rights reserved.****** The information and source code contained herein is the exclusive*** property of Intel Corporation and may not be disclosed, examined*** or reproduced in whole or in part without explicit written authorization*** from the company.**/
//++//// Module Name://// miscs.s//// Abstract://// This module implements the IA64 intrinsics.//// Author://// William K. Cheung (wcheung) 18-Mar-1996//// Environment://// Any mode.//// Revision History:////--
#include "ksia64.h"
//++//// ULONGLONG// _P32ToP64 (// ULONG Pointer// )//// Routine Description://// This function swizzles a pointer.//// Arguments://// Pointer (a0) - 32-bit pointer.//// Return Value://// Swizzle pointer value.////-- LEAF_ENTRY(_P32ToP64)
nop.m 0 sxt4 v0 = a0 (p0) br.ret.sptk brp
LEAF_EXIT(_P32ToP64) //++//// struct _TEB *// _read_teb (// VOID// )//// Routine Description://// This function swizzles a pointer.//// Arguments://// None.//// Return Value://// TEB pointer.////-- LEAF_ENTRY(_read_teb)
nop.m 0 mov v0 = teb br.ret.sptk brp
LEAF_EXIT(_read_teb)
LEAF_ENTRY(_mf)
mf nop.m 0 br.ret.sptk brp
LEAF_EXIT(_mf)
LEAF_ENTRY(InterlockedExchange) ALTERNATE_ENTRY(_InterlockedExchange)
sxt4 a0 = a0 nop.m 0 nop.i 0 ;;
xchg4.nt1 v0 = [a0], a1 nop.i 0 br.ret.sptk.clr brp
LEAF_EXIT(_InterlockedExchange)
//++//// PVOID// InterlockedCompareExchange (// IN OUT PVOID *Destination,// IN PVOID Exchange,// IN PVOID Comperand// )//// Routine Description://// This function performs an interlocked compare of the destination// value with the comperand value. If the destination value is equal// to the comperand value, then the exchange value is stored in the// destination. Otherwise, no operation is performed.//// Arguments://// Destination - Supplies a pointer to destination value.//// Exchange - Supplies the exchange value.//// Comperand - Supplies the comperand value.//// Return Value://// (r8) - The initial destination value.////--
LEAF_ENTRY(InterlockedCompareExchange) ALTERNATE_ENTRY(_InterlockedCompareExchange)
mov ar.ccv = a2 ARGPTR(a0) ;;
cmpxchg4.acq v0 = [a0], a1, ar.ccv br.ret.sptk.clr brp
LEAF_EXIT(_InterlockedCompareExchange)
//++//// LONG// InterlockedIncrement(// IN PLONG Addend// )//// Routine Description://// This function performs an interlocked add of one to the addend variable.//// No checking is done for overflow.//// Arguments://// Addend - Supplies a pointer to a variable whose value is to be// incremented by one.//// Return Value://// (v0) < 0 (but not necessarily -1) if result of add < 0// (v0) == 0 if result of add == 0// (v0) > 0 (but not necessarily +1) if result of add > 0////-- LEAF_ENTRY(InterlockedIncrement) ALTERNATE_ENTRY(_InterlockedIncrement) LEAF_SETUP(1, 0, 0, 0)
rAddend = in0 rRetValue = v0
ARGPTR(rAddend) fetchadd4.acq rRetValue = [rAddend], 1 ;;
add rRetValue = 1, rRetValue br.ret.sptk brp
LEAF_EXIT(_InterlockedIncrement)
//++//// LONG// InterlockedDecrement(// IN PLONG Addend// )//// Routine Description://// This function performs an interlocked add of -1 to the addend variable.//// No checking is done for overflow//// Arguments://// Addend - Supplies a pointer to a variable whose value is to be// decremented by one.//// Return Value://// (v0) < 0 (but not necessarily -1) if result of dec < 0// (v0) == 0 if result of dec == 0// (v0) > 0 (but not necessarily +1) if result of dec > 0////-- LEAF_ENTRY(InterlockedDecrement) ALTERNATE_ENTRY(_InterlockedDecrement) LEAF_SETUP(1, 0, 0, 0)
rAddend = in0 rRetValue = v0
ARGPTR(rAddend) fetchadd4.acq rRetValue = [rAddend], -1 ;;
sub rRetValue = rRetValue, zero, 1 br.ret.sptk brp
LEAF_EXIT(_InterlockedDecrement)
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