ARMAssemblerInterface.cpp revision bfc6dc4ca8d5a1ee498e80a18350b91519a5412c 
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
27namespace android {
28
29// ----------------------------------------------------------------------------
30
31ARMAssemblerInterface::~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
43uint32_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
52uint32_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
68void ARMAssemblerInterface::ADDR_LDR(int cc, int Rd,
69     int Rn, uint32_t offset)
70{
71    LDR(cc, Rd, Rn, offset);
72}
73void ARMAssemblerInterface::ADDR_STR(int cc, int Rd,
74     int Rn, uint32_t offset)
75{
76    STR(cc, Rd, Rn, offset);
77}
78void 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}
83void 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