1 /*
 2  * Copyright Amazon.com Inc. 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 #include "spin_wait_aarch64.hpp"
25 #include "utilities/debug.hpp"
26 
27 #include <string.h>
28 
29 bool SpinWait::supports(const char *name) {
30   return name != nullptr &&
31          (strcmp(name, "nop")   == 0 ||
32           strcmp(name, "isb")   == 0 ||
33           strcmp(name, "yield") == 0 ||
34           strcmp(name, "sb")    == 0 ||
35           strcmp(name, "none")  == 0);
36 }
37 
38 SpinWait::Inst SpinWait::from_name(const char* name) {
39   assert(supports(name), "checked by OnSpinWaitInstNameConstraintFunc");
40 
41   if (strcmp(name, "nop") == 0) {
42     return SpinWait::NOP;
43   } else if (strcmp(name, "isb") == 0) {
44     return SpinWait::ISB;
45   } else if (strcmp(name, "yield") == 0) {
46     return SpinWait::YIELD;
47   } else if (strcmp(name, "sb") == 0) {
48     return SpinWait::SB;
49   }
50 
51   return SpinWait::NONE;
52 }