void InstructionCodeGeneratorMIPS::GenerateFpCompareAndBranch()

in compiler/optimizing/code_generator_mips.cc [3051:3245]

• 195 lines of code
• 44 McCabe index (conditional complexity)

void InstructionCodeGeneratorMIPS::GenerateFpCompareAndBranch(IfCondition cond,
                                                              bool gt_bias,
                                                              Primitive::Type type,
                                                              LocationSummary* locations,
                                                              MipsLabel* label) {
  FRegister lhs = locations->InAt(0).AsFpuRegister<FRegister>();
  FRegister rhs = locations->InAt(1).AsFpuRegister<FRegister>();
  bool isR6 = codegen_->GetInstructionSetFeatures().IsR6();
  if (type == Primitive::kPrimFloat) {
    if (isR6) {
      switch (cond) {
        case kCondEQ:
          __ CmpEqS(FTMP, lhs, rhs);
          __ Bc1nez(FTMP, label);
          break;
        case kCondNE:
          __ CmpEqS(FTMP, lhs, rhs);
          __ Bc1eqz(FTMP, label);
          break;
        case kCondLT:
          if (gt_bias) {
            __ CmpLtS(FTMP, lhs, rhs);
          } else {
            __ CmpUltS(FTMP, lhs, rhs);
          }
          __ Bc1nez(FTMP, label);
          break;
        case kCondLE:
          if (gt_bias) {
            __ CmpLeS(FTMP, lhs, rhs);
          } else {
            __ CmpUleS(FTMP, lhs, rhs);
          }
          __ Bc1nez(FTMP, label);
          break;
        case kCondGT:
          if (gt_bias) {
            __ CmpUltS(FTMP, rhs, lhs);
          } else {
            __ CmpLtS(FTMP, rhs, lhs);
          }
          __ Bc1nez(FTMP, label);
          break;
        case kCondGE:
          if (gt_bias) {
            __ CmpUleS(FTMP, rhs, lhs);
          } else {
            __ CmpLeS(FTMP, rhs, lhs);
          }
          __ Bc1nez(FTMP, label);
          break;
        default:
          LOG(FATAL) << "Unexpected non-floating-point condition";
      }
    } else {
      switch (cond) {
        case kCondEQ:
          __ CeqS(0, lhs, rhs);
          __ Bc1t(0, label);
          break;
        case kCondNE:
          __ CeqS(0, lhs, rhs);
          __ Bc1f(0, label);
          break;
        case kCondLT:
          if (gt_bias) {
            __ ColtS(0, lhs, rhs);
          } else {
            __ CultS(0, lhs, rhs);
          }
          __ Bc1t(0, label);
          break;
        case kCondLE:
          if (gt_bias) {
            __ ColeS(0, lhs, rhs);
          } else {
            __ CuleS(0, lhs, rhs);
          }
          __ Bc1t(0, label);
          break;
        case kCondGT:
          if (gt_bias) {
            __ CultS(0, rhs, lhs);
          } else {
            __ ColtS(0, rhs, lhs);
          }
          __ Bc1t(0, label);
          break;
        case kCondGE:
          if (gt_bias) {
            __ CuleS(0, rhs, lhs);
          } else {
            __ ColeS(0, rhs, lhs);
          }
          __ Bc1t(0, label);
          break;
        default:
          LOG(FATAL) << "Unexpected non-floating-point condition";
      }
    }
  } else {
    DCHECK_EQ(type, Primitive::kPrimDouble);
    if (isR6) {
      switch (cond) {
        case kCondEQ:
          __ CmpEqD(FTMP, lhs, rhs);
          __ Bc1nez(FTMP, label);
          break;
        case kCondNE:
          __ CmpEqD(FTMP, lhs, rhs);
          __ Bc1eqz(FTMP, label);
          break;
        case kCondLT:
          if (gt_bias) {
            __ CmpLtD(FTMP, lhs, rhs);
          } else {
            __ CmpUltD(FTMP, lhs, rhs);
          }
          __ Bc1nez(FTMP, label);
          break;
        case kCondLE:
          if (gt_bias) {
            __ CmpLeD(FTMP, lhs, rhs);
          } else {
            __ CmpUleD(FTMP, lhs, rhs);
          }
          __ Bc1nez(FTMP, label);
          break;
        case kCondGT:
          if (gt_bias) {
            __ CmpUltD(FTMP, rhs, lhs);
          } else {
            __ CmpLtD(FTMP, rhs, lhs);
          }
          __ Bc1nez(FTMP, label);
          break;
        case kCondGE:
          if (gt_bias) {
            __ CmpUleD(FTMP, rhs, lhs);
          } else {
            __ CmpLeD(FTMP, rhs, lhs);
          }
          __ Bc1nez(FTMP, label);
          break;
        default:
          LOG(FATAL) << "Unexpected non-floating-point condition";
      }
    } else {
      switch (cond) {
        case kCondEQ:
          __ CeqD(0, lhs, rhs);
          __ Bc1t(0, label);
          break;
        case kCondNE:
          __ CeqD(0, lhs, rhs);
          __ Bc1f(0, label);
          break;
        case kCondLT:
          if (gt_bias) {
            __ ColtD(0, lhs, rhs);
          } else {
            __ CultD(0, lhs, rhs);
          }
          __ Bc1t(0, label);
          break;
        case kCondLE:
          if (gt_bias) {
            __ ColeD(0, lhs, rhs);
          } else {
            __ CuleD(0, lhs, rhs);
          }
          __ Bc1t(0, label);
          break;
        case kCondGT:
          if (gt_bias) {
            __ CultD(0, rhs, lhs);
          } else {
            __ ColtD(0, rhs, lhs);
          }
          __ Bc1t(0, label);
          break;
        case kCondGE:
          if (gt_bias) {
            __ CuleD(0, rhs, lhs);
          } else {
            __ ColeD(0, rhs, lhs);
          }
          __ Bc1t(0, label);
          break;
        default:
          LOG(FATAL) << "Unexpected non-floating-point condition";
      }
    }
  }
}