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File: [Pegasus] / pegasus / src / Pegasus / Common / LoadAndClearWord_HPUX_PARISC_ACC.s (download)
Revision: 1.3, Fri Nov 10 18:14:58 2006 UTC (17 years, 7 months ago) by kumpf
Branch: MAIN
CVS Tags: TASK_PEP328_SOLARIS_NEVADA_PORT, TASK-PEP328_SOLARIS_NEVADA_PORT_v2-root, TASK-PEP328_SOLARIS_NEVADA_PORT_v2-branch, TASK-PEP328_SOLARIS_NEVADA_PORT-root, TASK-PEP328_SOLARIS_NEVADA_PORT-branch, TASK-PEP328_SOLARIS_IX86_CC_PORT-root, TASK-PEP328_SOLARIS_IX86_CC_PORT-branch-v2, TASK-PEP328_SOLARIS_IX86_CC_PORT-branch, TASK-PEP311_WSMan-root, TASK-PEP311_WSMan-branch, TASK-PEP305_VXWORKS-root, TASK-PEP305_VXWORKS-branch-pre-solaris-port, TASK-PEP305_VXWORKS-branch-post-solaris-port, TASK-PEP305_VXWORKS-branch-beta2, TASK-PEP305_VXWORKS-branch, TASK-PEP305_VXWORKS-2008-10-23, TASK-PEP291_IPV6-root, TASK-PEP291_IPV6-branch, TASK-PEP286_PRIVILEGE_SEPARATION-root, TASK-PEP286_PRIVILEGE_SEPARATION-branch, TASK-PEP274_dacim-root, TASK-PEP274_dacim-merged_out_to_branch, TASK-PEP274_dacim-merged_out_from_trunk, TASK-PEP274_dacim-merged_in_to_trunk, TASK-PEP274_dacim-merged_in_from_branch, TASK-PEP274_dacim-branch, TASK-Bug2102_RCMPIWindows-root, TASK-Bug2102_RCMPIWindows-merged_out_to_branch, TASK-Bug2102_RCMPIWindows-merged_out_from_trunk, TASK-Bug2102_RCMPIWindows-merged_in_to_trunk, TASK-Bug2102_RCMPIWindows-merged_in_from_branch, TASK-Bug2102_RCMPIWindows-branch, TASK-Bug2102Final-root, TASK-Bug2102Final-merged_out_to_branch, TASK-Bug2102Final-merged_out_from_trunk, TASK-Bug2102Final-merged_in_to_trunk, TASK-Bug2102Final-merged_in_from_branch, TASK-Bug2102Final-branch, TASK-BUG7240-root, TASK-BUG7240-branch, TASK-BUG7146_SqlRepositoryPrototype-root, TASK-BUG7146_SqlRepositoryPrototype-merged_out_to_branch, TASK-BUG7146_SqlRepositoryPrototype-merged_out_from_trunk, TASK-BUG7146_SqlRepositoryPrototype-merged_in_to_trunk, TASK-BUG7146_SqlRepositoryPrototype-merged_in_from_branch, TASK-BUG7146_SqlRepositoryPrototype-branch, RELEASE_2_8_2-RC1, RELEASE_2_8_2, RELEASE_2_8_1-RC1, RELEASE_2_8_1, RELEASE_2_8_0_BETA, RELEASE_2_8_0-RC2, RELEASE_2_8_0-RC1, RELEASE_2_8_0-FC, RELEASE_2_8_0, RELEASE_2_8-root, RELEASE_2_8-branch, RELEASE_2_7_3-RC1, RELEASE_2_7_3, RELEASE_2_7_2-RC1, RELEASE_2_7_2, RELEASE_2_7_1-RC1, RELEASE_2_7_1, RELEASE_2_7_0-RC1, RELEASE_2_7_0-BETA, RELEASE_2_7_0, RELEASE_2_7-root, RELEASE_2_7-branch, RELEASE_2_6_3-RC2, RELEASE_2_6_3-RC1, RELEASE_2_6_3, RELEASE_2_6_2-RC1, RELEASE_2_6_2, RELEASE_2_6_1-RC1, RELEASE_2_6_1, RELEASE_2_6_0-RC1, RELEASE_2_6_0-FC, RELEASE_2_6_0, RELEASE_2_6-root, RELEASE_2_6-branch-clean, RELEASE_2_6-branch, PEP286_PRIVILEGE_SEPARATION_ROOT, PEP286_PRIVILEGE_SEPARATION_CODE_FREEZE, PEP286_PRIVILEGE_SEPARATION_BRANCH, PEP286_PRIVILEGE_SEPARATION_1, Makefile
Changes since 1.2: +0 -2 lines
BUG#: 5840
TITLE: Common modules do not meet chksrc requirements
DESCRIPTION: Remove tab characters and author names and shorten lines that are wider than 80 characters.

;%2006////////////////////////////////////////////////////////////////////////
;
; Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
; Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
; Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
; IBM Corp.; EMC Corporation, The Open Group.
; Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
; IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
; Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
; EMC Corporation; VERITAS Software Corporation; The Open Group.
; Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
; EMC Corporation; Symantec Corporation; The Open Group.
;
; Permission is hereby granted, free of charge, to any person obtaining a copy
; of this software and associated documentation files (the "Software"), to
; deal in the Software without restriction, including without limitation the
; rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
; sell copies of the Software, and to permit persons to whom the Software is
; furnished to do so, subject to the following conditions:
;  
; THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
; ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
; "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
; LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
; PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
; ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
; WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
;
;==============================================================================
;
;%/////////////////////////////////////////////////////////////////////////////

;
; LoadAndClearWord_HPUX_PARISC_ACC.s:
; HP-UX PA-RISC assembly language routine for spinlock support.
;

    .code
#ifdef __LP64__
    .level 2.0W
#else
    .level 1.1
#endif
    .export LoadAndClearWord,entry,priv_lev=3,rtnval=gr
    .proc

LoadAndClearWord
    .callinfo no_calls
    .enter

; create a 16 byte aligned pointer to the load+clear word area
    addi        15,%arg0,%arg2  ; add 15 to the pointer to round up

#ifdef __LP64__
    depdi       0,63,4,%arg2    ; mask the lower 4 bits (64-bit)
#else
    depi        0,31,4,%arg2    ; mask the lower 4 bits (32-bit)
#endif

#ifdef __LP64__
    bve       (%r2)          ; return 0 if already locked, else !0
#else
    bv        (%r2)          ; return 0 if already locked, else !0
#endif
    ldcws,co  (%arg2),%ret0  ; (in branch delay slot)
                        ; load and clear (coherent) the spinlock word

; This code is never executed.  This endless loop reduces the
; prefetching after mispredicted bv on pre PA 8700 processors.
; Leave this dead code here to improve performance.

load_and_clear_loop
      b load_and_clear_loop
      nop
     .leave
     .procend

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