static byte TestBool(JavaCode code, JavaType stackTop)
{
if (stackTop.IsReference)
{
return(0xC7); // ifnonnull
}
if (stackTop.PrimitiveType == TypeCode.Int64 ||
stackTop.PrimitiveType == TypeCode.UInt64 ||
stackTop.PrimitiveType == TypeCode.Int32 ||
stackTop.PrimitiveType == TypeCode.UInt32 ||
stackTop.PrimitiveType == TypeCode.Int16 ||
stackTop.PrimitiveType == TypeCode.UInt16 ||
stackTop.PrimitiveType == TypeCode.SByte ||
stackTop.PrimitiveType == TypeCode.Byte ||
stackTop.PrimitiveType == TypeCode.Char ||
stackTop.PrimitiveType == TypeCode.Boolean)
{
if (stackTop.PrimitiveType == TypeCode.Int64 ||
stackTop.PrimitiveType == TypeCode.UInt64)
{
CilMain.MakeRoomForCategory2ValueOnStack(code, JavaType.LongType);
code.NewInstruction(0x09 /* lconst_0 (long) */, null, null);
code.NewInstruction(0x94 /* lcmp (long) */, null, null);
}
return(0x9A); // ifne != zero
}
throw new InvalidProgramException();
}
static int ConvertToLong(JavaCode code, TypeCode oldType, TypeCode newType)
{
if (oldType == TypeCode.Int64 || oldType == TypeCode.UInt64)
{
return(0x00); // nop
}
if (oldType == TypeCode.Double)
{
return(0x8F); // d2l
}
if (oldType == TypeCode.Single)
{
return(0x8C); // f2l
}
if (newType == TypeCode.UInt64)
{
code.NewInstruction(0x85 /* i2l */, null, null);
code.StackMap.PushStack(JavaType.LongType);
long maskValue = (oldType == TypeCode.Byte) ? 0xFF
: (oldType == TypeCode.UInt16) ? 0xFFFF
: 0xFFFFFFFF;
code.NewInstruction(0x12 /* ldc */, null, (long)maskValue);
code.StackMap.PushStack(JavaType.LongType);
code.StackMap.PopStack(CilMain.Where);
code.StackMap.PopStack(CilMain.Where);
return(0x7F); // land
}
CilMain.MakeRoomForCategory2ValueOnStack(code);
return(0x85); // i2l
}
static int ConvertToFloat(JavaCode code, TypeCode oldType, TypeCode newType, bool unsigned)
{
if (newType == TypeCode.Single)
{
//
// convert to float
//
if (oldType == TypeCode.Single)
{
return(0x00); // nop
}
if (oldType == TypeCode.Double)
{
return(0x90); // d2f
}
if (oldType == TypeCode.Int64)
{
return(0x89); // l2f
}
if (oldType != TypeCode.UInt64)
{
return(0x86); // i2f
}
CallUnsignedLongToDouble(code);
code.NewInstruction(0x8D /* d2f */, null, null);
return(-1); // no output
}
else if (!unsigned)
{
//
// convert to double
//
if (oldType == TypeCode.Double)
{
return(0x00); // nop
}
if (oldType == TypeCode.Single)
{
CilMain.MakeRoomForCategory2ValueOnStack(code);
return(0x8D); // f2d
}
if (oldType == TypeCode.Int64)
{
return(0x8A); // l2d
}
if (oldType != TypeCode.UInt64)
{
return(0x87); // i2d
}
CallUnsignedLongToDouble(code);
return(-1); // no output
}
else
{
//
// convert integer, interpreted as unsigned, to a double
//
if (oldType == TypeCode.Single || oldType == TypeCode.Double)
{
throw new InvalidProgramException();
}
bool fromInt32 = (oldType != TypeCode.Int64 && oldType != TypeCode.UInt64);
if (fromInt32)
{
CilMain.MakeRoomForCategory2ValueOnStack(code);
code.NewInstruction(0x85 /* i2l */, null, null);
code.StackMap.PushStack(JavaType.LongType);
if (oldType == TypeCode.UInt32)
{
code.NewInstruction(0x12 /* ldc */, null, (long)0xFFFFFFFF);
code.StackMap.PushStack(JavaType.LongType);
code.NewInstruction(0x7F /* land */, null, null);
code.StackMap.PopStack(CilMain.Where);
}
}
CallUnsignedLongToDouble(code);
if (fromInt32)
{
code.StackMap.PopStack(CilMain.Where);
}
return(-1); // no output
}
void CallUnsignedLongToDouble(JavaCode code)
{
code.NewInstruction(0xB8 /* invokestatic */,
CilType.From(JavaType.DoubleType).AsWritableClass,
new JavaMethodRef("UnsignedLongToDouble",
JavaType.DoubleType, JavaType.LongType));
}
}