MdePkg/Library/BaseLib/Ipf/SwitchStack.s File Reference
Detailed Description
IPF specific
SwitchStack() function
Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.
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.
Module Name: SwitchStack.s
.auto
.text
.proc AsmSwitchStackAndBackingStore
.type AsmSwitchStackAndBackingStore,
.regstk 5, 0, 0, 0
AsmSwitchStackAndBackingStore::
mov r14 = ar.rsc
movl r2 = ~((((1 << 14) - 1) << 16) | 3)
mov r17 = in1
mov r18 = in2
and r2 = r14, r2
flushrs
mov ar.rsc = r2
mov sp = in3
mov r19 = in4
ld8.nt1 r16 = [in0], 8
ld8.nta gp = [in0]
mov r3 = -1
loadrs
mov ar.bspstore = r19
mov b7 = r16
alloc r2 = ar.pfs, 0, 0, 2, 0
mov out0 = r17
mov out1 = r18
mov ar.rnat = r3
mov ar.rsc = r14
br.call.sptk.many b0 = b7
.endp AsmSwitchStackAndBackingStore