Builtin (Apache SystemDS 3.0.0 API)

java.lang.Object
- org.apache.sysds.runtime.functionobjects.FunctionObject
- - org.apache.sysds.runtime.functionobjects.ValueFunction
  - - org.apache.sysds.runtime.functionobjects.Builtin

All Implemented Interfaces:

Serializable
```
public class Builtin
extends ValueFunction
```
Class with pre-defined set of objects. This class can not be instantiated elsewhere. Notes on commons.math FastMath: * FastMath uses lookup tables and interpolation instead of native calls. * The memory overhead for those tables is roughly 48KB in total (acceptable) * Micro and application benchmarks showed significantly (30%-3x) performance improvements for most operations; without loss of accuracy. * atan / sqrt were 20% slower in FastMath and hence, we use Math there * round / abs were equivalent in FastMath and hence, we use Math there * Finally, there is just one argument against FastMath - The comparison heavily depends on the JVM. For example, currently the IBM JDK JIT compiles to HW instructions for sqrt which makes this operation very efficient; as soon as other operations like log/exp are similarly compiled, we should rerun the micro benchmarks, and switch back if necessary.

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class Builtin.BuiltinCode

Field Summary

Fields
Modifier and Type Field Description

Builtin.BuiltinCode bFunc

static HashMap<String,Builtin.BuiltinCode> String2BuiltinCode

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`execute(double in)`
`double`	`execute(double in1, double in2)`
`double`	`execute(long in)`
`double`	`execute(long in1, long in2)`
`String`	`execute(String in1)`
`Builtin.BuiltinCode`	`getBuiltinCode()`
`static Builtin`	`getBuiltinFnObject(String str)`
`static Builtin`	`getBuiltinFnObject(Builtin.BuiltinCode code)`
`static boolean`	`isBuiltinCode(ValueFunction fn, Builtin.BuiltinCode... codes)`
`static boolean`	`isBuiltinFnObject(String str)`
`String`	`toString()`

Methods inherited from class org.apache.sysds.runtime.functionobjects.ValueFunction
requiresCorrection

Methods inherited from class org.apache.sysds.runtime.functionobjects.FunctionObject
clone, execute, execute, execute, execute, execute, execute, execute, execute

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

bFunc
```
public Builtin.BuiltinCode bFunc
```

String2BuiltinCode

public static HashMap<String,Builtin.BuiltinCode> String2BuiltinCode

Method Detail

getBuiltinCode

public Builtin.BuiltinCode getBuiltinCode()

isBuiltinCode

public static boolean isBuiltinCode(ValueFunction fn,
                                    Builtin.BuiltinCode... codes)

isBuiltinFnObject

public static boolean isBuiltinFnObject(String str)

getBuiltinFnObject

public static Builtin getBuiltinFnObject(String str)

getBuiltinFnObject

public static Builtin getBuiltinFnObject(Builtin.BuiltinCode code)

execute
```
public double execute(double in)
```
Overrides:

execute in class FunctionObject

execute
```
public double execute(long in)
```
Overrides:

execute in class FunctionObject

execute

public double execute(double in1,
                      double in2)

Overrides:: execute in class FunctionObject

execute

public double execute(long in1,
                      long in2)

Overrides:: execute in class FunctionObject

execute
```
public String execute(String in1)
```
Overrides:

execute in class FunctionObject

toString
```
public String toString()
```
Overrides:

toString in class Object