1 /*

     2  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 #include "precompiled.hpp"

    26 #include "asm/macroAssembler.inline.hpp"

    27 #include "runtime/os.hpp"

    28 #include "runtime/threadLocalStorage.hpp"

    29 

    30 #include <sys/trap.h>          // For trap numbers

    31 #include <v9/sys/psr_compat.h> // For V8 compatibility

    32 

    33 void MacroAssembler::read_ccr_trap(Register ccr_save) {

    34   // Execute a trap to get the PSR, mask and shift

    35   // to get the condition codes.

    36   get_psr_trap();

    37   nop();

    38   set(PSR_ICC, ccr_save);

    39   and3(O0, ccr_save, ccr_save);

    40   srl(ccr_save, PSR_ICC_SHIFT, ccr_save);

    41 }

    42 

    43 void MacroAssembler::write_ccr_trap(Register ccr_save, Register scratch1, Register scratch2) {

    44   // Execute a trap to get the PSR, shift back

    45   // the condition codes, mask the condition codes

    46   // back into and PSR and trap to write back the

    47   // PSR.

    48   sll(ccr_save, PSR_ICC_SHIFT, scratch2);

    49   get_psr_trap();

    50   nop();

    51   set(~PSR_ICC, scratch1);

    52   and3(O0, scratch1, O0);

    53   or3(O0, scratch2, O0);

    54   set_psr_trap();

    55   nop();

    56 }

    57 

    58 void MacroAssembler::flush_windows_trap() { trap(ST_FLUSH_WINDOWS); }

    59 void MacroAssembler::clean_windows_trap() { trap(ST_CLEAN_WINDOWS); }

    60 void MacroAssembler::get_psr_trap()       { trap(ST_GETPSR); }

    61 void MacroAssembler::set_psr_trap()       { trap(ST_SETPSR); }