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 */
dvmCompilerAllocTypedTempPair(CompilationUnit * cUnit,bool fpHint,int regClass)32 int 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
dvmCompilerAllocTypedTemp(CompilationUnit * cUnit,bool fpHint,int regClass)54 int 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