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//
// Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved.
// DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
//
// This code is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License version 2 only, as
// published by the Free Software Foundation.
//
// This code is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// version 2 for more details (a copy is included in the LICENSE file that
// accompanied this code).
//
// You should have received a copy of the GNU General Public License version
// 2 along with this work; if not, write to the Free Software Foundation,
// Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
//
// Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
// or visit www.oracle.com if you need additional information or have any
// questions.
//
//
// Get the raw thread ID from %g7
.inline _raw_thread_id, 0
.register %g7,#scratch
.volatile
mov %g7, %o0
.nonvolatile
.end
// Clear SPARC fprs.FEF DU and DL bits --
// allows the kernel to avoid saving FPU state at context-switch time.
// Use for state-transition points (into _thread_blocked) or when
// parking.
.inline _mark_fpu_nosave, 0
.volatile
wr %g0, 0, %fprs
.nonvolatile
.end
// Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest).
//
// Arguments:
// exchange_value: O0
// dest: O1
//
// Results:
// O0: the value previously stored in dest
.inline _Atomic_swap32, 2
.volatile
swap [%o1],%o0
.nonvolatile
.end
// Support for intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t * dest).
//
// 64-bit
//
// Arguments:
// exchange_value: O0
// dest: O1
//
// Results:
// O0: the value previously stored in dest
.inline _Atomic_swap64, 2
.volatile
1:
mov %o0, %o3
ldx [%o1], %o2
casx [%o1], %o2, %o3
cmp %o2, %o3
bne %xcc, 1b
nop
mov %o2, %o0
.nonvolatile
.end
// Support for jint Atomic::cmpxchg(jint exchange_value,
// volatile jint* dest,
// jint compare_value)
//
// Arguments:
// exchange_value: O0
// dest: O1
// compare_value: O2
//
// Results:
// O0: the value previously stored in dest
.inline _Atomic_cas32, 3
.volatile
cas [%o1], %o2, %o0
.nonvolatile
.end
// Support for intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value,
// volatile intptr_t* dest,
// intptr_t compare_value)
//
// 64-bit
//
// Arguments:
// exchange_value: O0
// dest: O1
// compare_value: O2
//
// Results:
// O0: the value previously stored in dest
.inline _Atomic_cas64, 3
.volatile
casx [%o1], %o2, %o0
.nonvolatile
.end
// Support for jlong Atomic::cmpxchg(jlong exchange_value,
// volatile jlong* dest,
// jlong compare_value)
//
// 32-bit calling conventions
//
// Arguments:
// exchange_value: O1:O0
// dest: O2
// compare_value: O4:O3
//
// Results:
// O1:O0: the value previously stored in dest
.inline _Atomic_casl, 3
.volatile
sllx %o0, 32, %o0
srl %o1, 0, %o1
or %o0,%o1,%o0
sllx %o3, 32, %o3
srl %o4, 0, %o4
or %o3,%o4,%o3
casx [%o2], %o3, %o0
srl %o0, 0, %o1
srlx %o0, 32, %o0
.nonvolatile
.end
// Support for jlong Atomic::load and Atomic::store on v8.
//
// void _Atomic_move_long_v8(volatile jlong* src, volatile jlong* dst)
//
// Arguments:
// src: O0
// dest: O1
//
// Overwrites O2 and O3
.inline _Atomic_move_long_v8,2
.volatile
ldd [%o0], %o2
std %o2, [%o1]
.nonvolatile
.end
// Support for jlong Atomic::load and Atomic::store on v9.
//
// void _Atomic_move_long_v9(volatile jlong* src, volatile jlong* dst)
//
// Arguments:
// src: O0
// dest: O1
//
// Overwrites O2
.inline _Atomic_move_long_v9,2
.volatile
ldx [%o0], %o2
stx %o2, [%o1]
.nonvolatile
.end
// Support for jint Atomic::add(jint add_value, volatile jint* dest).
//
// Arguments:
// add_value: O0 (e.g., +1 or -1)
// dest: O1
//
// Results:
// O0: the new value stored in dest
//
// Overwrites O3
.inline _Atomic_add32, 2
.volatile
2:
ld [%o1], %o2
add %o0, %o2, %o3
cas [%o1], %o2, %o3
cmp %o2, %o3
bne 2b
nop
add %o0, %o2, %o0
.nonvolatile
.end
// Support for intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest)
//
// 64-bit
//
// Arguments:
// add_value: O0 (e.g., +1 or -1)
// dest: O1
//
// Results:
// O0: the new value stored in dest
//
// Overwrites O3
.inline _Atomic_add64, 2
.volatile
3:
ldx [%o1], %o2
add %o0, %o2, %o3
casx [%o1], %o2, %o3
cmp %o2, %o3
bne %xcc, 3b
nop
add %o0, %o2, %o0
.nonvolatile
.end
// Support for void OrderAccess::acquire()
// The method is intentionally empty.
// It exists for the sole purpose of generating
// a C/C++ sequence point over which the compiler won't
// reorder code.
.inline _OrderAccess_acquire,0
.volatile
.nonvolatile
.end
// Support for void OrderAccess::fence()
.inline _OrderAccess_fence,0
.volatile
membar #StoreLoad
.nonvolatile
.end
// Support for void Prefetch::read(void *loc, intx interval)
//
// Prefetch for several reads.
.inline _Prefetch_read, 2
.volatile
prefetch [%o0+%o1], 0
.nonvolatile
.end
// Support for void Prefetch::write(void *loc, intx interval)
//
// Prefetch for several writes.
.inline _Prefetch_write, 2
.volatile
prefetch [%o0+%o1], 2
.nonvolatile
.end
// Support for void Copy::conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count)
//
// 32-bit
//
// Arguments:
// from: O0
// to: O1
// count: O2 treated as signed
//
// Clobbers:
// long_value: O2, O3
// count: O4
//
// if (from > to) {
// while (--count >= 0) {
// *to++ = *from++;
// }
// } else {
// while (--count >= 0) {
// to[count] = from[count];
// }
// }
.inline _Copy_conjoint_jlongs_atomic, 3
.volatile
cmp %o0, %o1
bleu 4f
sll %o2, 3, %o4
ba 2f
1:
subcc %o4, 8, %o4
std %o2, [%o1]
add %o0, 8, %o0
add %o1, 8, %o1
2:
bge,a 1b
ldd [%o0], %o2
ba 5f
nop
3:
std %o2, [%o1+%o4]
4:
subcc %o4, 8, %o4
bge,a 3b
ldd [%o0+%o4], %o2
5:
.nonvolatile
.end
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