private Code readBinaryAssign(int opcode, boolean wideBase, boolean wideRest) throws IOException {
int target = readBase(wideBase);
int leftOperand = readBase(wideBase);
int rightOperand = readBase(wideBase);
int typeIdx = readRest(wideRest);
Type type = typePool[typeIdx];
switch (opcode) {
case Code.OPCODE_append:
case Code.OPCODE_appendl:
case Code.OPCODE_appendr:
{
if (!(type instanceof Type.EffectiveList)) {
throw new RuntimeException("expecting list type");
}
Code.BinListKind kind = Code.BinListKind.values()[opcode - Code.OPCODE_append];
return Code.BinListOp((Type.EffectiveList) type, target, leftOperand, rightOperand, kind);
}
case Code.OPCODE_sappend:
case Code.OPCODE_sappendl:
case Code.OPCODE_sappendr:
{
if (!(type instanceof Type.Strung)) {
throw new RuntimeException("expecting string type");
}
Code.BinStringKind kind = Code.BinStringKind.values()[opcode - Code.OPCODE_sappend];
return Code.BinStringOp(target, leftOperand, rightOperand, kind);
}
case Code.OPCODE_indexof:
{
if (!(type instanceof Type.EffectiveIndexible)) {
throw new RuntimeException("expecting indexible type");
}
return Code.IndexOf((Type.EffectiveIndexible) type, target, leftOperand, rightOperand);
}
case Code.OPCODE_add:
case Code.OPCODE_sub:
case Code.OPCODE_mul:
case Code.OPCODE_div:
case Code.OPCODE_rem:
case Code.OPCODE_range:
case Code.OPCODE_bitwiseor:
case Code.OPCODE_bitwisexor:
case Code.OPCODE_bitwiseand:
case Code.OPCODE_lshr:
case Code.OPCODE_rshr:
{
Code.BinArithKind kind = Code.BinArithKind.values()[opcode - Code.OPCODE_add];
return Code.BinArithOp(type, target, leftOperand, rightOperand, kind);
}
case Code.OPCODE_union:
case Code.OPCODE_unionl:
case Code.OPCODE_unionr:
case Code.OPCODE_intersect:
case Code.OPCODE_intersectl:
case Code.OPCODE_intersectr:
case Code.OPCODE_difference:
case Code.OPCODE_differencel:
{
if (!(type instanceof Type.EffectiveSet)) {
throw new RuntimeException("expecting set type");
}
Code.BinSetKind kind = Code.BinSetKind.values()[opcode - Code.OPCODE_union];
return Code.BinSetOp((Type.EffectiveSet) type, target, leftOperand, rightOperand, kind);
}
}
throw new RuntimeException("unknown opcode encountered (" + opcode + ")");
}
