1 /* libs/pixelflinger/codeflinger/ARMAssemblerInterface.cpp
2 **
3 ** Copyright 2006, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 **     http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17 
18 
19 #include <errno.h>
20 #include <stdlib.h>
21 #include <stdint.h>
22 #include <sys/types.h>
23 
24 #include <cutils/log.h>
25 #include "ARMAssemblerInterface.h"
26 
27 namespace android {
28 
29 // ----------------------------------------------------------------------------
30 
~ARMAssemblerInterface()31 ARMAssemblerInterface::~ARMAssemblerInterface()
32 {
33 }
34 
35 // --------------------------------------------------------------------
36 
37 // The following two functions are static and used for initializers
38 // in the original ARM code. The above versions (without __), are now
39 // virtual, and can be overridden in the MIPS code. But since these are
40 // needed at initialization time, they must be static. Not thrilled with
41 // this implementation, but it works...
42 
__immed12_pre(int32_t immed12,int W)43 uint32_t ARMAssemblerInterface::__immed12_pre(int32_t immed12, int W)
44 {
45     LOG_ALWAYS_FATAL_IF(abs(immed12) >= 0x800,
46                         "LDR(B)/STR(B)/PLD immediate too big (%08x)",
47                         immed12);
48     return (1<<24) | (((uint32_t(immed12)>>31)^1)<<23) |
49             ((W&1)<<21) | (abs(immed12)&0x7FF);
50 }
51 
__immed8_pre(int32_t immed8,int W)52 uint32_t ARMAssemblerInterface::__immed8_pre(int32_t immed8, int W)
53 {
54     uint32_t offset = abs(immed8);
55 
56     LOG_ALWAYS_FATAL_IF(abs(immed8) >= 0x100,
57                         "LDRH/LDRSB/LDRSH/STRH immediate too big (%08x)",
58                         immed8);
59 
60     return  (1<<24) | (1<<22) | (((uint32_t(immed8)>>31)^1)<<23) |
61             ((W&1)<<21) | (((offset&0xF0)<<4)|(offset&0xF));
62 }
63 
64 // The following four functions are required for address manipulation
65 // These are virtual functions, which can be overridden by architectures
66 // that need special handling of address values (e.g. 64-bit arch)
67 
ADDR_LDR(int cc,int Rd,int Rn,uint32_t offset)68 void ARMAssemblerInterface::ADDR_LDR(int cc, int Rd,
69      int Rn, uint32_t offset)
70 {
71     LDR(cc, Rd, Rn, offset);
72 }
ADDR_STR(int cc,int Rd,int Rn,uint32_t offset)73 void ARMAssemblerInterface::ADDR_STR(int cc, int Rd,
74      int Rn, uint32_t offset)
75 {
76     STR(cc, Rd, Rn, offset);
77 }
ADDR_ADD(int cc,int s,int Rd,int Rn,uint32_t Op2)78 void ARMAssemblerInterface::ADDR_ADD(int cc, int s,
79      int Rd, int Rn, uint32_t Op2)
80 {
81     dataProcessing(opADD, cc, s, Rd, Rn, Op2);
82 }
ADDR_SUB(int cc,int s,int Rd,int Rn,uint32_t Op2)83 void ARMAssemblerInterface::ADDR_SUB(int cc, int s,
84      int Rd, int Rn, uint32_t Op2)
85 {
86     dataProcessing(opSUB, cc, s, Rd, Rn, Op2);
87 }
88 }; // namespace android
89 
90