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LeafOS / LeafOS-Project / android_art / ef885cdfa8e3c61a67750110c1efcdd2559af1ec / . / disassembler / disassembler_mips.cc
blob: 2d15f6f41edd0c9d2a4e766027d138541b321ef8 [file] [log] [blame]
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "disassembler_mips.h"
#include <ostream>
#include <sstream>
#include "base/logging.h"
#include "base/stringprintf.h"
#include "thread.h"
namespace art {
namespace mips {
struct MipsInstruction {
uint32_t mask;
uint32_t value;
const char* name;
const char* args_fmt;
bool Matches(uint32_t instruction) const {
return (instruction & mask) == value;
}
};
static const uint32_t kOpcodeShift = 26;
static const uint32_t kCop1 = (17 << kOpcodeShift);
static const uint32_t kITypeMask = (0x3f << kOpcodeShift);
static const uint32_t kJTypeMask = (0x3f << kOpcodeShift);
static const uint32_t kRTypeMask = ((0x3f << kOpcodeShift) | (0x3f));
static const uint32_t kSpecial0Mask = (0x3f << kOpcodeShift);
static const uint32_t kSpecial2Mask = (0x3f << kOpcodeShift);
static const uint32_t kSpecial3Mask = (0x3f << kOpcodeShift);
static const uint32_t kFpMask = kRTypeMask;
static const MipsInstruction gMipsInstructions[] = {
// "sll r0, r0, 0" is the canonical "nop", used in delay slots.
{ 0xffffffff, 0, "nop", "" },
// R-type instructions.
{ kRTypeMask, 0, "sll", "DTA", },
// 0, 1, movci
{ kRTypeMask, 2, "srl", "DTA", },
{ kRTypeMask, 3, "sra", "DTA", },
{ kRTypeMask | (0x1f << 6), 4, "sllv", "DTS", },
{ kRTypeMask | (0x1f << 6), 6, "srlv", "DTS", },
{ kRTypeMask | (0x1f << 6), (1 << 6) | 6, "rotrv", "DTS", },
{ kRTypeMask | (0x1f << 6), 7, "srav", "DTS", },
{ kRTypeMask, 8, "jr", "S", },
{ kRTypeMask | (0x1f << 11), 9 | (31 << 11), "jalr", "S", }, // rd = 31 is implicit.
{ kRTypeMask | (0x1f << 11), 9, "jr", "S", }, // rd = 0 is implicit.
{ kRTypeMask, 9, "jalr", "DS", }, // General case.
{ kRTypeMask | (0x1f << 6), 10, "movz", "DST", },
{ kRTypeMask | (0x1f << 6), 11, "movn", "DST", },
{ kRTypeMask, 12, "syscall", "", }, // TODO: code
{ kRTypeMask, 13, "break", "", }, // TODO: code
{ kRTypeMask, 15, "sync", "", }, // TODO: type
{ kRTypeMask, 16, "mfhi", "D", },
{ kRTypeMask, 17, "mthi", "S", },
{ kRTypeMask, 18, "mflo", "D", },
{ kRTypeMask, 19, "mtlo", "S", },
{ kRTypeMask | (0x1f << 6), 20, "dsllv", "DTS", },
{ kRTypeMask | (0x1f << 6), 22, "dsrlv", "DTS", },
{ kRTypeMask | (0x1f << 6), (1 << 6) | 22, "drotrv", "DTS", },
{ kRTypeMask | (0x1f << 6), 23, "dsrav", "DTS", },
{ kRTypeMask | (0x1f << 6), 24, "mult", "ST", },
{ kRTypeMask | (0x1f << 6), 25, "multu", "ST", },
{ kRTypeMask | (0x1f << 6), 26, "div", "ST", },
{ kRTypeMask | (0x1f << 6), 27, "divu", "ST", },
{ kRTypeMask | (0x1f << 6), 24 + (2 << 6), "mul", "DST", },
{ kRTypeMask | (0x1f << 6), 24 + (3 << 6), "muh", "DST", },
{ kRTypeMask | (0x1f << 6), 26 + (2 << 6), "div", "DST", },
{ kRTypeMask | (0x1f << 6), 26 + (3 << 6), "mod", "DST", },
{ kRTypeMask, 32, "add", "DST", },
{ kRTypeMask, 33, "addu", "DST", },
{ kRTypeMask, 34, "sub", "DST", },
{ kRTypeMask, 35, "subu", "DST", },
{ kRTypeMask, 36, "and", "DST", },
{ kRTypeMask, 37, "or", "DST", },
{ kRTypeMask, 38, "xor", "DST", },
{ kRTypeMask, 39, "nor", "DST", },
{ kRTypeMask, 42, "slt", "DST", },
{ kRTypeMask, 43, "sltu", "DST", },
{ kRTypeMask, 45, "daddu", "DST", },
{ kRTypeMask, 46, "dsub", "DST", },
{ kRTypeMask, 47, "dsubu", "DST", },
// TODO: tge[u], tlt[u], teg, tne
{ kRTypeMask | (0x1f << 21), 56, "dsll", "DTA", },
{ kRTypeMask | (0x1f << 21), 58, "dsrl", "DTA", },
{ kRTypeMask | (0x1f << 21), (1 << 21) | 58, "drotr", "DTA", },
{ kRTypeMask | (0x1f << 21), 59, "dsra", "DTA", },
{ kRTypeMask | (0x1f << 21), 60, "dsll32", "DTA", },
{ kRTypeMask | (0x1f << 21), 62, "dsrl32", "DTA", },
{ kRTypeMask | (0x1f << 21), (1 << 21) | 62, "drotr32", "DTA", },
{ kRTypeMask | (0x1f << 21), 63, "dsra32", "DTA", },
// SPECIAL0
{ kSpecial0Mask | 0x7ff, (2 << 6) | 24, "mul", "DST" },
{ kSpecial0Mask | 0x7ff, (3 << 6) | 24, "muh", "DST" },
{ kSpecial0Mask | 0x7ff, (2 << 6) | 25, "mulu", "DST" },
{ kSpecial0Mask | 0x7ff, (3 << 6) | 25, "muhu", "DST" },
{ kSpecial0Mask | 0x7ff, (2 << 6) | 26, "div", "DST" },
{ kSpecial0Mask | 0x7ff, (3 << 6) | 26, "mod", "DST" },
{ kSpecial0Mask | 0x7ff, (2 << 6) | 27, "divu", "DST" },
{ kSpecial0Mask | 0x7ff, (3 << 6) | 27, "modu", "DST" },
{ kSpecial0Mask | 0x7ff, (2 << 6) | 28, "dmul", "DST" },
{ kSpecial0Mask | 0x7ff, (3 << 6) | 28, "dmuh", "DST" },
{ kSpecial0Mask | 0x7ff, (2 << 6) | 29, "dmulu", "DST" },
{ kSpecial0Mask | 0x7ff, (3 << 6) | 29, "dmuhu", "DST" },
{ kSpecial0Mask | 0x7ff, (2 << 6) | 30, "ddiv", "DST" },
{ kSpecial0Mask | 0x7ff, (3 << 6) | 30, "dmod", "DST" },
{ kSpecial0Mask | 0x7ff, (2 << 6) | 31, "ddivu", "DST" },
{ kSpecial0Mask | 0x7ff, (3 << 6) | 31, "dmodu", "DST" },
{ kSpecial0Mask | 0x7ff, (0 << 6) | 53, "seleqz", "DST" },
{ kSpecial0Mask | 0x7ff, (0 << 6) | 55, "selnez", "DST" },
{ kSpecial0Mask | (0x1f << 21) | 0x3f, (1 << 21) | 2, "rotr", "DTA", },
{ kSpecial0Mask | (0x1f << 16) | 0x7ff, (0x01 << 6) | 0x10, "clz", "DS" },
{ kSpecial0Mask | (0x1f << 16) | 0x7ff, (0x01 << 6) | 0x11, "clo", "DS" },
{ kSpecial0Mask | (0x1f << 16) | 0x7ff, (0x01 << 6) | 0x12, "dclz", "DS" },
{ kSpecial0Mask | (0x1f << 16) | 0x7ff, (0x01 << 6) | 0x13, "dclo", "DS" },
// TODO: sdbbp
// SPECIAL2
{ kSpecial2Mask | 0x7ff, (28 << kOpcodeShift) | 2, "mul", "DST" },
{ kSpecial2Mask | 0x7ff, (28 << kOpcodeShift) | 32, "clz", "DS" },
{ kSpecial2Mask | 0x7ff, (28 << kOpcodeShift) | 33, "clo", "DS" },
{ kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 0, "madd", "ST" },
{ kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 1, "maddu", "ST" },
{ kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 2, "mul", "DST" },
{ kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 4, "msub", "ST" },
{ kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 5, "msubu", "ST" },
{ kSpecial2Mask | 0x3f, (28 << kOpcodeShift) | 0x3f, "sdbbp", "" }, // TODO: code
// SPECIAL3
{ kSpecial3Mask | 0x3f, (31 << kOpcodeShift) | 3, "dext", "TSAZ", },
{ kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f,
(31 << kOpcodeShift) | (16 << 6) | 32,
"seb",
"DT", },
{ kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f,
(31 << kOpcodeShift) | (24 << 6) | 32,
"seh",
"DT", },
{ kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f,
(31 << kOpcodeShift) | 32,
"bitswap",
"DT", },
{ kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f,
(31 << kOpcodeShift) | 36,
"dbitswap",
"DT", },
{ kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f,
(31 << kOpcodeShift) | (2 << 6) | 36,
"dsbh",
"DT", },
{ kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f,
(31 << kOpcodeShift) | (5 << 6) | 36,
"dshd",
"DT", },
{ kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f,
(31 << kOpcodeShift) | (2 << 6) | 32,
"wsbh",
"DT", },
{ kSpecial3Mask | 0x7f, (31 << kOpcodeShift) | 0x26, "sc", "Tl", },
{ kSpecial3Mask | 0x7f, (31 << kOpcodeShift) | 0x27, "scd", "Tl", },
{ kSpecial3Mask | 0x7f, (31 << kOpcodeShift) | 0x36, "ll", "Tl", },
{ kSpecial3Mask | 0x7f, (31 << kOpcodeShift) | 0x37, "lld", "Tl", },
// J-type instructions.
{ kJTypeMask, 2 << kOpcodeShift, "j", "L" },
{ kJTypeMask, 3 << kOpcodeShift, "jal", "L" },
// I-type instructions.
{ kITypeMask, 4 << kOpcodeShift, "beq", "STB" },
{ kITypeMask, 5 << kOpcodeShift, "bne", "STB" },
{ kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (1 << 16), "bgez", "SB" },
{ kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (0 << 16), "bltz", "SB" },
{ kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (2 << 16), "bltzl", "SB" },
{ kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (16 << 16), "bltzal", "SB" },
{ kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (18 << 16), "bltzall", "SB" },
{ kITypeMask | (0x1f << 16), 6 << kOpcodeShift | (0 << 16), "blez", "SB" },
{ kITypeMask, 6 << kOpcodeShift, "bgeuc", "STB" },
{ kITypeMask | (0x1f << 16), 7 << kOpcodeShift | (0 << 16), "bgtz", "SB" },
{ kITypeMask, 7 << kOpcodeShift, "bltuc", "STB" },
{ kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (6 << 16), "dahi", "Si", },
{ kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (30 << 16), "dati", "Si", },
{ 0xffff0000, (4 << kOpcodeShift), "b", "B" },
{ 0xffff0000, (1 << kOpcodeShift) | (17 << 16), "bal", "B" },
{ kITypeMask, 8 << kOpcodeShift, "beqc", "STB" },
{ kITypeMask, 8 << kOpcodeShift, "addi", "TSi", },
{ kITypeMask, 9 << kOpcodeShift, "addiu", "TSi", },
{ kITypeMask, 10 << kOpcodeShift, "slti", "TSi", },
{ kITypeMask, 11 << kOpcodeShift, "sltiu", "TSi", },
{ kITypeMask, 12 << kOpcodeShift, "andi", "TSi", },
{ kITypeMask, 13 << kOpcodeShift, "ori", "TSi", },
{ kITypeMask, 14 << kOpcodeShift, "xori", "TSi", },
{ kITypeMask | (0x1f << 21), 15 << kOpcodeShift, "lui", "TI", },
{ kITypeMask, 15 << kOpcodeShift, "aui", "TSI", },
{ kITypeMask | (0x1f << 21), 22 << kOpcodeShift, "blezc", "TB" },
// TODO: de-dup
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (1 << 21) | (1 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (2 << 21) | (2 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (3 << 21) | (3 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (4 << 21) | (4 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (5 << 21) | (5 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (6 << 21) | (6 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (7 << 21) | (7 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (8 << 21) | (8 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (9 << 21) | (9 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (10 << 21) | (10 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (11 << 21) | (11 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (12 << 21) | (12 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (13 << 21) | (13 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (14 << 21) | (14 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (15 << 21) | (15 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (16 << 21) | (16 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (17 << 21) | (17 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (18 << 21) | (18 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (19 << 21) | (19 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (20 << 21) | (20 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (21 << 21) | (21 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (22 << 21) | (22 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (23 << 21) | (23 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (24 << 21) | (24 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (25 << 21) | (25 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (26 << 21) | (26 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (27 << 21) | (27 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (28 << 21) | (28 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (29 << 21) | (29 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (30 << 21) | (30 << 16), "bgezc", "TB" },
{ kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (31 << 21) | (31 << 16), "bgezc", "TB" },
{ kITypeMask, 22 << kOpcodeShift, "bgec", "STB" },
{ kITypeMask | (0x1f << 21), 23 << kOpcodeShift, "bgtzc", "TB" },
// TODO: de-dup
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (1 << 21) | (1 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (2 << 21) | (2 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (3 << 21) | (3 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (4 << 21) | (4 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (5 << 21) | (5 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (6 << 21) | (6 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (7 << 21) | (7 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (8 << 21) | (8 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (9 << 21) | (9 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (10 << 21) | (10 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (11 << 21) | (11 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (12 << 21) | (12 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (13 << 21) | (13 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (14 << 21) | (14 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (15 << 21) | (15 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (16 << 21) | (16 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (17 << 21) | (17 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (18 << 21) | (18 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (19 << 21) | (19 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (20 << 21) | (20 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (21 << 21) | (21 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (22 << 21) | (22 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (23 << 21) | (23 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (24 << 21) | (24 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (25 << 21) | (25 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (26 << 21) | (26 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (27 << 21) | (27 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (28 << 21) | (28 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (29 << 21) | (29 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (30 << 21) | (30 << 16), "bltzc", "TB" },
{ kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (31 << 21) | (31 << 16), "bltzc", "TB" },
{ kITypeMask, 23 << kOpcodeShift, "bltc", "STB" },
{ kITypeMask, 24 << kOpcodeShift, "bnec", "STB" },
{ kITypeMask, 25 << kOpcodeShift, "daddiu", "TSi", },
{ kITypeMask, 29 << kOpcodeShift, "daui", "TSi", },
{ kITypeMask, 32u << kOpcodeShift, "lb", "TO", },
{ kITypeMask, 33u << kOpcodeShift, "lh", "TO", },
{ kITypeMask, 35u << kOpcodeShift, "lw", "TO", },
{ kITypeMask, 36u << kOpcodeShift, "lbu", "TO", },
{ kITypeMask, 37u << kOpcodeShift, "lhu", "TO", },
{ kITypeMask, 39u << kOpcodeShift, "lwu", "TO", },
{ kITypeMask, 40u << kOpcodeShift, "sb", "TO", },
{ kITypeMask, 41u << kOpcodeShift, "sh", "TO", },
{ kITypeMask, 43u << kOpcodeShift, "sw", "TO", },
{ kITypeMask, 49u << kOpcodeShift, "lwc1", "tO", },
{ kJTypeMask, 50u << kOpcodeShift, "bc", "P" },
{ kITypeMask, 53u << kOpcodeShift, "ldc1", "tO", },
{ kITypeMask | (0x1f << 21), 54u << kOpcodeShift, "jic", "Ti" },
{ kITypeMask | (1 << 21), (54u << kOpcodeShift) | (1 << 21), "beqzc", "Sb" }, // TODO: de-dup?
{ kITypeMask | (1 << 22), (54u << kOpcodeShift) | (1 << 22), "beqzc", "Sb" },
{ kITypeMask | (1 << 23), (54u << kOpcodeShift) | (1 << 23), "beqzc", "Sb" },
{ kITypeMask | (1 << 24), (54u << kOpcodeShift) | (1 << 24), "beqzc", "Sb" },
{ kITypeMask | (1 << 25), (54u << kOpcodeShift) | (1 << 25), "beqzc", "Sb" },
{ kITypeMask, 55u << kOpcodeShift, "ld", "TO", },
{ kITypeMask, 57u << kOpcodeShift, "swc1", "tO", },
{ kITypeMask | (0x1f << 16), (59u << kOpcodeShift) | (30 << 16), "auipc", "Si" },
{ kITypeMask | (0x3 << 19), (59u << kOpcodeShift) | (0 << 19), "addiupc", "Sp" },
{ kITypeMask, 61u << kOpcodeShift, "sdc1", "tO", },
{ kITypeMask | (0x1f << 21), 62u << kOpcodeShift, "jialc", "Ti" },
{ kITypeMask | (1 << 21), (62u << kOpcodeShift) | (1 << 21), "bnezc", "Sb" }, // TODO: de-dup?
{ kITypeMask | (1 << 22), (62u << kOpcodeShift) | (1 << 22), "bnezc", "Sb" },
{ kITypeMask | (1 << 23), (62u << kOpcodeShift) | (1 << 23), "bnezc", "Sb" },
{ kITypeMask | (1 << 24), (62u << kOpcodeShift) | (1 << 24), "bnezc", "Sb" },
{ kITypeMask | (1 << 25), (62u << kOpcodeShift) | (1 << 25), "bnezc", "Sb" },
{ kITypeMask, 63u << kOpcodeShift, "sd", "TO", },
// Floating point.
{ kFpMask | (0x1f << 21), kCop1 | (0x00 << 21), "mfc1", "Td" },
{ kFpMask | (0x1f << 21), kCop1 | (0x01 << 21), "dmfc1", "Td" },
{ kFpMask | (0x1f << 21), kCop1 | (0x03 << 21), "mfhc1", "Td" },
{ kFpMask | (0x1f << 21), kCop1 | (0x04 << 21), "mtc1", "Td" },
{ kFpMask | (0x1f << 21), kCop1 | (0x05 << 21), "dmtc1", "Td" },
{ kFpMask | (0x1f << 21), kCop1 | (0x07 << 21), "mthc1", "Td" },
{ kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 0, "add", "fadt" },
{ kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 1, "sub", "fadt" },
{ kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 2, "mul", "fadt" },
{ kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 3, "div", "fadt" },
{ kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 4, "sqrt", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 5, "abs", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 6, "mov", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 7, "neg", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 8, "round.l", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 9, "trunc.l", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 10, "ceil.l", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 11, "floor.l", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 12, "round.w", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 13, "trunc.w", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 14, "ceil.w", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 15, "floor.w", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 26, "rint", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 27, "class", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 32, "cvt.s", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 33, "cvt.d", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 36, "cvt.w", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 37, "cvt.l", "fad" },
{ kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 38, "cvt.ps", "fad" },
{ kFpMask, kCop1 | 0x10, "sel", "fadt" },
{ kFpMask, kCop1 | 0x1e, "max", "fadt" },
{ kFpMask, kCop1 | 0x1c, "min", "fadt" },
};
static uint32_t ReadU32(const uint8_t* ptr) {
// We only support little-endian MIPS.
return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24);
}
size_t DisassemblerMips::Dump(std::ostream& os, const uint8_t* instr_ptr) {
uint32_t instruction = ReadU32(instr_ptr);
uint32_t rs = (instruction >> 21) & 0x1f; // I-type, R-type.
uint32_t rt = (instruction >> 16) & 0x1f; // I-type, R-type.
uint32_t rd = (instruction >> 11) & 0x1f; // R-type.
uint32_t sa = (instruction >> 6) & 0x1f; // R-type.
std::string opcode;
std::ostringstream args;
// TODO: remove this!
uint32_t op = (instruction >> 26) & 0x3f;
uint32_t function = (instruction & 0x3f); // R-type.
opcode = StringPrintf("op=%d fn=%d", op, function);
for (size_t i = 0; i < arraysize(gMipsInstructions); ++i) {
if (gMipsInstructions[i].Matches(instruction)) {
opcode = gMipsInstructions[i].name;
for (const char* args_fmt = gMipsInstructions[i].args_fmt; *args_fmt; ++args_fmt) {
switch (*args_fmt) {
case 'A': // sa (shift amount or [d]ext position).
args << sa;
break;
case 'B': // Branch offset.
{
int32_t offset = static_cast<int16_t>(instruction & 0xffff);
offset <<= 2;
offset += 4; // Delay slot.
args << FormatInstructionPointer(instr_ptr + offset)
<< StringPrintf(" ; %+d", offset);
}
break;
case 'b': // 21-bit branch offset.
{
int32_t offset = (instruction & 0x1fffff) - ((instruction & 0x100000) << 1);
offset <<= 2;
offset += 4; // Delay slot.
args << FormatInstructionPointer(instr_ptr + offset)
<< StringPrintf(" ; %+d", offset);
}
break;
case 'D': args << 'r' << rd; break;
case 'd': args << 'f' << rd; break;
case 'a': args << 'f' << sa; break;
case 'f': // Floating point "fmt".
{
size_t fmt = (instruction >> 21) & 0x7; // TODO: other fmts?
switch (fmt) {
case 0: opcode += ".s"; break;
case 1: opcode += ".d"; break;
case 4: opcode += ".w"; break;
case 5: opcode += ".l"; break;
case 6: opcode += ".ps"; break;
default: opcode += ".?"; break;
}
continue; // No ", ".
}
case 'I': // Upper 16-bit immediate.
args << reinterpret_cast<void*>((instruction & 0xffff) << 16);
break;
case 'i': // Sign-extended lower 16-bit immediate.
args << static_cast<int16_t>(instruction & 0xffff);
break;
case 'L': // Jump label.
{
// TODO: is this right?
uint32_t instr_index = (instruction & 0x1ffffff);
uint32_t target = (instr_index << 2);
target |= (reinterpret_cast<uintptr_t>(instr_ptr + 4) & 0xf0000000);
args << reinterpret_cast<void*>(target);
}
break;
case 'l': // 9-bit signed offset
{
int32_t offset = static_cast<int16_t>(instruction) >> 7;
args << StringPrintf("%+d(r%d)", offset, rs);
}
break;
case 'O': // +x(rs)
{
int32_t offset = static_cast<int16_t>(instruction & 0xffff);
args << StringPrintf("%+d(r%d)", offset, rs);
if (rs == 17) {
args << " ; ";
if (is64bit_) {
Thread::DumpThreadOffset<8>(args, offset);
} else {
Thread::DumpThreadOffset<4>(args, offset);
}
}
}
break;
case 'P': // 26-bit offset in bc.
{
int32_t offset = (instruction & 0x3ffffff) - ((instruction & 0x2000000) << 1);
offset <<= 2;
offset += 4;
args << FormatInstructionPointer(instr_ptr + offset);
args << StringPrintf(" ; %+d", offset);
}
break;
case 'p': // 19-bit offset in addiupc.
{
int32_t offset = (instruction & 0x7ffff) - ((instruction & 0x40000) << 1);
args << offset << " ; move r" << rs << ", ";
args << FormatInstructionPointer(instr_ptr + (offset << 2));
}
break;
case 'S': args << 'r' << rs; break;
case 's': args << 'f' << rs; break;
case 'T': args << 'r' << rt; break;
case 't': args << 'f' << rt; break;
case 'Z': args << rd; break; // sz ([d]ext size).
}
if (*(args_fmt + 1)) {
args << ", ";
}
}
break;
}
}
// Special cases for sequences of:
// pc-relative +/- 2GB branch:
// auipc reg, imm
// jic reg, imm
// pc-relative +/- 2GB branch and link:
// auipc reg, imm
// daddiu reg, reg, imm
// jialc reg, 0
if (((op == 0x36 && rs == 0 && rt != 0) || // jic
(op == 0x19 && rs == rt && rt != 0)) && // daddiu
last_ptr_ && (intptr_t)instr_ptr - (intptr_t)last_ptr_ == 4 &&
(last_instr_ & 0xFC1F0000) == 0xEC1E0000 && // auipc
((last_instr_ >> 21) & 0x1F) == rt) {
uint32_t offset = (last_instr_ << 16) | (instruction & 0xFFFF);
offset -= (offset & 0x8000) << 1;
offset -= 4;
if (op == 0x36) {
args << " ; b ";
} else {
args << " ; move r" << rt << ", ";
}
args << FormatInstructionPointer(instr_ptr + (int32_t)offset);
args << StringPrintf(" ; %+d", (int32_t)offset);
}
os << FormatInstructionPointer(instr_ptr)
<< StringPrintf(": %08x\t%-7s ", instruction, opcode.c_str())
<< args.str() << '\n';
last_ptr_ = instr_ptr;
last_instr_ = instruction;
return 4;
}
void DisassemblerMips::Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end) {
for (const uint8_t* cur = begin; cur < end; cur += 4) {
Dump(os, cur);
}
}
} // namespace mips
} // namespace art