1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17/*
18 * This file contains codegen for the Thumb ISA and is intended to be
19 * includes by:
20 *
21 *        Codegen-$(TARGET_ARCH_VARIANT).c
22 *
23 */
24
25/* Stress mode for testing: if defined will reverse corereg/floatreg hint */
26//#define REGCLASS_STRESS_MODE
27
28/*
29 * Alloc a pair of core registers, or a double.  Low reg in low byte,
30 * high reg in next byte.
31 */
32int dvmCompilerAllocTypedTempPair(CompilationUnit *cUnit,
33                                         bool fpHint, int regClass)
34{
35    int highReg;
36    int lowReg;
37    int res = 0;
38
39#if defined(REGCLASS_STRESS_MODE)
40    fpHint = !fpHint;
41#endif
42
43    if (((regClass == kAnyReg) && fpHint) || (regClass == kFPReg)) {
44        lowReg = dvmCompilerAllocTempDouble(cUnit);
45        highReg = lowReg + 1;
46    } else {
47        lowReg = dvmCompilerAllocTemp(cUnit);
48        highReg = dvmCompilerAllocTemp(cUnit);
49    }
50    res = (lowReg & 0xff) | ((highReg & 0xff) << 8);
51    return res;
52}
53
54int dvmCompilerAllocTypedTemp(CompilationUnit *cUnit, bool fpHint,
55                                     int regClass)
56{
57#if defined(REGCLASS_STRESS_MODE)
58    fpHint = !fpHint;
59#endif
60    if (((regClass == kAnyReg) && fpHint) || (regClass == kFPReg))
61        return dvmCompilerAllocTempFloat(cUnit);
62    return dvmCompilerAllocTemp(cUnit);
63}
64