Support for MIPS in architecture independent files....

src/mips/constants-mips.cc

+#include "v8.h"
+#include "constants-mips.h"
+
+namespace assembler {
+namespace mips {
+
+namespace v8i = v8::internal;
+
+
+// -----------------------------------------------------------------------------
+// Registers
+
+
+// These register names are defined in a way to match the native disassembler
+// formatting. See for example the command "objdump -d <binary file>".
+const char* Registers::names_[kNumRegisters] = {
+                "zero_reg",
+                "at",
+                "v0",   "v1",
+                "a0",   "a1",   "a2",   "a3",
+                "t0",   "t1",   "t2",   "t3",   "t4",   "t5",   "t6",   "t7",
+                "s0",   "s1",   "s2",   "s3",   "s4",   "s5",   "s6",   "s7",
+                "t8",   "t9",
+                "k0",   "k1",
+                "gp",
+                "sp",
+                "fp",
+                "ra"
+};
+
+// List of alias names which can be used when referring to MIPS registers.
+const Registers::RegisterAlias Registers::aliases_[] = {
+  {0, "zero"},
+  {23, "cp"},
+  {30, "s8"},
+  {30, "s8_fp"},
+  {kInvalidRegister, NULL}
+};
+
+const char* Registers::Name(int reg) {
+  const char* result;
+  if ((0 <= reg) && (reg < kNumRegisters)) {
+    result = names_[reg];
+  } else {
+    result = "noreg";
+  }
+  return result;
+}
+
+
+int Registers::Number(const char* name) {
+  // Look through the canonical names.
+  for (int i = 0; i < kNumRegisters; i++) {
+    if (strcmp(names_[i], name) == 0) {
+      return i;
+    }
+  }
+
+  // Look through the alias names.
+  int i = 0;
+  while (aliases_[i].reg != kInvalidRegister) {
+    if (strcmp(aliases_[i].name, name) == 0) {
+      return aliases_[i].reg;
+    }
+    i++;
+  }
+
+  // No register with the reguested name found.
+  return kInvalidRegister;
+}
+
+
+const char* CRegisters::names_[kNumCRegisters] = {
+  "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", "f11",
+  "f12", "f13", "f14", "f15", "f16", "f17", "f18", "f19", "f20", "f21",
+  "f22", "f23", "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31"
+};
+
+// List of alias names which can be used when referring to MIPS registers.
+const CRegisters::RegisterAlias CRegisters::aliases_[] = {
+  {kInvalidRegister, NULL}
+};
+
+const char* CRegisters::Name(int creg) {
+  const char* result;
+  if ((0 <= creg) && (creg < kNumCRegisters)) {
+    result = names_[creg];
+  } else {
+    result = "nocreg";
+  }
+  return result;
+}
+
+
+int CRegisters::Number(const char* name) {
+  // Look through the canonical names.
+  for (int i = 0; i < kNumRegisters; i++) {
+    if (strcmp(names_[i], name) == 0) {
+      return i;
+    }
+  }
+
+  // Look through the alias names.
+  int i = 0;
+  while (aliases_[i].creg != kInvalidRegister) {
+    if (strcmp(aliases_[i].name, name) == 0) {
+      return aliases_[i].creg;
+    }
+    i++;
+  }
+
+  // No Cregister with the reguested name found.
+  return kInvalidCRegister;
+}
+
+
+// -----------------------------------------------------------------------------
+// Instruction
+
+bool Instruction::isForbiddenInBranchDelay() {
+  int op = OpcodeFieldRaw();
+  switch (op) {
+    case J:
+    case JAL:
+    case BEQ:
+    case BNE:
+    case BLEZ:
+    case BGTZ:
+    case BEQL:
+    case BNEL:
+    case BLEZL:
+    case BGTZL:
+      return true;

[antonm, 2010/01/21 13:10:45]

ditto

[Alexandre, 2010/01/22 23:08:42]

Fixed.
On 2010/01/21 13:10:45, antonm wrote:

+      break;
+    case REGIMM:
+      switch (rtFieldRaw()) {
+        case BLTZ:
+        case BGEZ:
+        case BLTZAL:
+        case BGEZAL:
+          return true;
+          break;
+        default:
+          return false;
+      };
+      break;
+    case SPECIAL:
+      switch (functionFieldRaw()) {
+        case JR:
+        case JALR:
+          return true;
+        default:
+          return false;
+      };
+      break;
+    default:
+      return false;
+  };
+}
+
+
+bool Instruction::isLinkingInstruction() {
+  int op = OpcodeFieldRaw();
+  switch (op) {
+    case JAL:
+    case BGEZAL:
+    case BLTZAL:
+      return true;
+      break;
+    case SPECIAL:
+      switch (functionFieldRaw()) {
+        case JALR:
+          return true;
+        default:
+          return false;
+      };
+    default:
+      return false;
+  };
+}  
+
+
+int Instruction::instrType() {
+  switch(OpcodeFieldRaw()) {
+    case SPECIAL:
+      switch(functionFieldRaw()) {
+        case JR:
+        case JALR:
+          return 3;
+          break;
+        case BREAK:
+          UNIMPLEMENTED();
+          break;
+        case SLL:
+        case SRL:
+        case SRA:
+        case SLLV:
+        case SRLV:
+        case SRAV:
+        case MFHI:
+        case MFLO:
+        case MULT:
+        case MULTU:
+        case DIV:
+        case DIVU:
+        case ADD:
+        case ADDU:
+        case SUB:
+        case SUBU:
+        case AND:
+        case OR:
+        case XOR:
+        case NOR:
+        case SLT:
+        case SLTU:
+        case TGE:
+        case TGEU:
+        case TLT:
+        case TLTU:
+        case TEQ:
+        case TNE:
+          return 1;
+          break;
+        default:
+          UNREACHABLE();
+          break;
+      };
+      break;
+    case SPECIAL2:
+      switch(functionFieldRaw()) {
+        case MUL:
+          return 1;
+          break;
+        default:
+          UNREACHABLE();
+          break;
+      };
+      break;
+    case COP1:    // Coprocessor instructions
+      switch(functionFieldRaw()) {
+        case BC1:   // branch on coprocessor condition
+          return 2;
+        default:
+          return 1;
+      };
+      break;
+    // 16 bits Immediate type instructions. eg: addi dest, src, imm16
+    case REGIMM:
+    case BEQ:
+    case BNE:
+    case BLEZ:
+    case BGTZ:
+    case ADDI:
+    case ADDIU:
+    case SLTI:
+    case SLTIU:
+    case ANDI:
+    case ORI:
+    case XORI:
+    case LUI:
+    case BEQL:
+    case BNEL:
+    case BLEZL:
+    case BGTZL:
+    case LB:
+    case LW:
+    case LBU:
+    case SB:
+    case SW:
+    case LWC1:
+    case LDC1:
+    case SWC1:
+    case SDC1:
+      return 2;
+      break;
+    // 26 bits immediate type instructions. eg: j imm26
+    case J:
+    case JAL:
+      return 3;
+      break;
+    default:
+      UNREACHABLE();
+  };
+
+  UNREACHABLE();
+  return -1;
+}
+
+} }   // namespace assembler::mips