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OpenCLKernelBuilder.scala
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OpenCLKernelBuilder.scala
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package com.thoughtworks.compute
import java.text.DecimalFormat
import com.dongxiguo.fastring.Fastring.Implicits._
import com.thoughtworks.compute.OpenCLKernelBuilder.ClTypeDefinition._
import com.thoughtworks.compute.Expressions.AllExpressions
import com.thoughtworks.compute.NDimensionalAffineTransform._
import com.thoughtworks.feature.Factory.{Factory1, Factory2, Factory3, Factory5, Factory6, inject}
import scala.collection.mutable
object OpenCLKernelBuilder {
private val smallNumberFormat = {
val format = new DecimalFormat()
format.setMinimumFractionDigits(0)
format.setGroupingUsed(false)
format
}
private val bigNumberFormat = {
val format = new DecimalFormat()
format.setGroupingUsed(false)
format
}
private def toLiteral(value: Double): String = {
val format = if (value > Int.MaxValue) {
bigNumberFormat
} else {
smallNumberFormat
}
format.format(value)
}
type ClTermCode = String
type ClTypeCode = String
type ClTypeDefineHandler = ClTypeSymbol => Unit
trait ClTypeDefinition extends Product {
def define(globalContext: GlobalContext): (ClTypeCode, ClTypeDefineHandler)
}
object ClTypeDefinition {
private val Noop: ClTypeDefineHandler = Function.const(())
final case class TupleDefinition(element: ClTypeDefinition, length: Int) extends ClTypeDefinition {
def define(globalContext: GlobalContext): (ClTypeCode, ClTypeDefineHandler) = {
val elementTypeCode = globalContext.cachedSymbol(element).typeCode
val tupleTypeCode = globalContext.freshName(raw"""${elementTypeCode}_tuple""")
val typeDefineHandler: ClTypeDefineHandler = { typeSymbol =>
globalContext.globalDefinitions += fastraw"""
typedef struct ${typeSymbol.typeCode} {
${elementTypeCode} tuple_data[$length];
} ${typeSymbol.typeCode};
"""
}
tupleTypeCode -> typeDefineHandler
}
}
final case class ArrayDefinition(element: ClTypeDefinition, shape: Array[Int]) extends ClTypeDefinition {
def define(globalContext: GlobalContext): (ClTypeCode, ClTypeDefineHandler) = {
val elementTypeCode = globalContext.cachedSymbol(element).typeCode
val arrayTypeCode = globalContext.freshName(raw"""${elementTypeCode}_array""")
val typeDefineHandler: ClTypeDefineHandler = { typeSymbol =>
val dimensions = for (size <- shape) yield fast"[$size]"
globalContext.globalDefinitions += fast"typedef global const ${elementTypeCode} (* ${typeSymbol.typeCode})${dimensions.mkFastring};\n"
}
arrayTypeCode -> typeDefineHandler
}
}
final case object FloatDefinition extends ClTypeDefinition {
def define(globalContext: GlobalContext): (ClTypeCode, ClTypeDefineHandler) = {
"float" -> Noop
}
}
}
final case class ClTypeSymbol(firstDefinition: ClTypeDefinition, typeCode: ClTypeCode)
final class GlobalContext extends Fastring {
private var seed = 0
def freshName(prefix: String): String = {
val encodedPrefix = prefix.map {
case c if (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') => c
case _ => '_'
}
val name = if (encodedPrefix.headOption.forall(_.isDigit)) {
raw"""_${encodedPrefix}_${seed}"""
} else {
raw"""${encodedPrefix}_${seed}"""
}
seed += 1
name
}
protected[OpenCLKernelBuilder] val globalDeclarations = mutable.Buffer.empty[Fastring]
protected[OpenCLKernelBuilder] val globalDefinitions = mutable.Buffer.empty[Fastring]
private val typeSymbolCache = mutable.HashMap.empty[ClTypeDefinition, ClTypeSymbol]
val floatSymbol = cachedSymbol(FloatDefinition)
def cachedSymbol(typeDefinition: ClTypeDefinition): ClTypeSymbol = {
val (name, defined) = typeDefinition.define(this)
val typeSymbol = typeSymbolCache.getOrElseUpdate(typeDefinition, {
ClTypeSymbol(typeDefinition, name)
})
if (typeSymbol.firstDefinition eq typeDefinition) {
defined(typeSymbol)
}
typeSymbol
}
def foreach[U](f: String => U): Unit = {
globalDeclarations.foreach(_.foreach(f))
globalDefinitions.foreach(_.foreach(f))
}
}
}
import com.thoughtworks.compute.OpenCLKernelBuilder._
/**
* @author 杨博 (Yang Bo)
*/
trait OpenCLKernelBuilder extends AllExpressions {
val globalContext: GlobalContext
import globalContext._
val localDefinitions = mutable.Buffer.empty[Fastring]
def generateKernelSourceCode(functionName: String,
numberOfDimensions: Int,
parameters: Seq[Term],
outputs: Seq[Term]): Fastring = {
val parameterDeclarations = for (parameter <- parameters) yield {
fast"${parameter.typeCode} const restrict ${parameter.termCode}"
}
val (outputParameters, outputAssignments) = outputs.map { output =>
val outputTermCode = output.termCode
val outputTypeCode = output.typeCode
val outputId = freshName("output")
val outputParameter = fast"global $outputTypeCode * const restrict $outputId"
val outputAssignment = if (numberOfDimensions > 0) {
def outputIndex(dimension: Int): Fastring = {
if (dimension == 0) {
fast"get_global_id(0)"
} else {
// FIXME: use constant value instead of call to get_global_size
fast"(${outputIndex(dimension - 1)} * get_global_size($dimension) + get_global_id($dimension))"
}
}
val index = outputIndex(numberOfDimensions - 1)
fast"$outputId[$index] = $outputTermCode;\n"
} else {
fast"*$outputId = $outputTermCode;\n"
}
(outputParameter, outputAssignment)
}.unzip
fastraw"""
kernel void $functionName(${(parameterDeclarations.view ++ outputParameters).mkFastring(", ")}) {
${localDefinitions.mkFastring}
${outputAssignments.mkFastring}
}
"""
}
protected trait ClTerm extends super.TermApi { this: Term =>
def termCode: ClTermCode
def typeCode: ClTypeCode
}
type Term <: ClTerm
protected trait CodeValues extends ClTerm { this: Term =>
val termCode: ClTermCode
val typeCode: ClTypeCode
}
protected trait ClValueType extends super.ValueTypeApi {
def typeSymbol: ClTypeSymbol
def term(code: ClTermCode): ThisTerm
}
type ValueType <: (Type with Any) with ClValueType
protected trait ClFloatType extends super.FloatTypeApi with FloatExpressionApi with ClValueType {
@inject def termFactory: Factory1[ClTermCode, ThisTerm]
def term(code: ClTermCode) = termFactory.newInstance(code)
def typeSymbol: ClTypeSymbol = floatSymbol
def literal(value: Float): ThisTerm = {
val floatString = if (value.isNaN) {
"NAN"
} else if (value.isInfinite) {
if (value > 0) {
"INFINITE"
} else {
"(-INFINITE)"
}
} else {
raw"""${value}f"""
}
termFactory.newInstance(floatString)
}
def parameter(id: Any): ThisTerm = {
val termSymbol = freshName(id.toString)
termFactory.newInstance(termSymbol)
}
def min(leftHandSide: FloatTerm, rightHandSide: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const ${leftHandSide.typeCode} $valueTermName = fmin(${leftHandSide.termCode}, ${rightHandSide.termCode});
"""
float.termFactory.newInstance(valueTermName)
}
def max(leftHandSide: FloatTerm, rightHandSide: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const ${leftHandSide.typeCode} $valueTermName = fmax(${leftHandSide.termCode}, ${rightHandSide.termCode});
"""
float.termFactory.newInstance(valueTermName)
}
def log(operand0: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const ${operand0.typeCode} $valueTermName = log(${operand0.termCode});
"""
float.termFactory.newInstance(valueTermName)
}
def exp(operand0: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const ${operand0.typeCode} $valueTermName = exp(${operand0.termCode});
"""
float.termFactory.newInstance(valueTermName)
}
def abs(operand0: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const ${operand0.typeCode} $valueTermName = fabs(${operand0.termCode});
"""
float.termFactory.newInstance(valueTermName)
}
def sqrt(operand0: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const ${operand0.typeCode} $valueTermName = sqrt(${operand0.termCode});
"""
float.termFactory.newInstance(valueTermName)
}
def tanh(operand0: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const ${operand0.typeCode} $valueTermName = tanh(${operand0.termCode});
"""
float.termFactory.newInstance(valueTermName)
}
}
type FloatType <: (ValueType with Any) with ClFloatType
protected trait ArrayView[LocalElement <: ValueTerm] extends super.ArrayTermApi with CodeValues {
this: ArrayTerm =>
val elementType: LocalElement#ThisType
def transform(matrix1: MatrixData): ThisTerm = {
val newMatrix: MatrixData =
NDimensionalAffineTransform.concatenate(matrix, matrix1, originalShape.length)
arrayViewFactory
.newInstance(elementType, newMatrix, originalPaddingCode, originalShape, termCode, typeCode)
.asInstanceOf[ThisTerm]
}
val originalPaddingCode: ClTermCode
val originalShape: Array[Int]
val matrix: MatrixData
def extract: Element = {
val numberOfRows = originalShape.length
val numberOfColumns = matrix.length / numberOfRows
if (matrix.length != numberOfRows * numberOfColumns) {
throw new IllegalStateException()
}
val (indices, indexDefinitions, bounds) = (for {
y <- 0 until numberOfRows
} yield {
val products = for {
x <- 0 until numberOfColumns
scale = matrix(y * numberOfColumns + x)
if scale != 0.0
} yield {
if (x < numberOfColumns - 1) {
scale match {
case 1.0 =>
fast"get_global_id($x)"
case scale =>
fast"get_global_id($x) * ${toLiteral(scale)}"
}
} else {
fast"${toLiteral(scale)}"
}
}
val indexId = freshName("index")
val (indexDefinition, bounds) = if (products.isEmpty) {
(fast"const int $indexId = 0;\n", Nil)
} else {
(fast"const int $indexId = (int)(${products.mkFastring(" + ")});\n",
Seq(fast"((bool)($indexId >= 0))", fast"((bool)($indexId < ${originalShape(y)}))"))
}
(indexId, indexDefinition, bounds)
}).unzip3
localDefinitions ++= indexDefinitions
val termId = freshName("")
val dereferenceCode = fast"(*${termCode})${indices.map { i =>
fast"[$i]"
}.mkFastring}"
val checkedDereference = {
val flatBounds = bounds.flatten
if (flatBounds.isEmpty) {
dereferenceCode
} else {
fast"(${bounds.flatten.mkFastring(" && ")}) ? $dereferenceCode : $originalPaddingCode"
}
}
localDefinitions += fastraw"""
const ${elementType.typeSymbol.typeCode} $termId = $checkedDereference;
"""
elementType.term(termId).asInstanceOf[Element]
}
}
@inject
protected def arrayViewFactory[LocalElement <: ValueTerm]
: Factory6[LocalElement#ThisType,
MatrixData,
ClTermCode,
Array[Int],
ClTermCode,
ClTypeCode,
ArrayTerm with ArrayView[LocalElement] { type Element = LocalElement }]
protected trait ArrayParameter[LocalElement <: ValueTerm] extends super.ArrayTermApi with CodeValues {
thisArrayParameter: ArrayTerm =>
val elementType: LocalElement#ThisType
val paddingCode: ClTermCode
val shape: Array[Int]
def transform(matrix: MatrixData): ThisTerm = {
arrayViewFactory.newInstance(elementType, matrix, paddingCode, shape, termCode, typeCode).asInstanceOf[ThisTerm]
}
def extract: Element = {
val globalIndices = for {
i <- shape.indices
} yield fast"[get_global_id($i)]"
val bounds = for {
(max, i) <- shape.view.zipWithIndex
} yield fast"get_global_id($i) < $max"
val valueTermName = freshName("")
val dereferenceCode = fast"(*${thisArrayParameter.termCode})${globalIndices.mkFastring}"
localDefinitions += fastraw"""
const ${elementType.typeSymbol.typeCode} $valueTermName = (${bounds.mkFastring(" && ")}) ? $dereferenceCode : $paddingCode;
"""
elementType.term(valueTermName).asInstanceOf[Element]
}
}
@inject
protected def arrayParameterFactory[LocalElement <: ValueTerm]
: Factory5[LocalElement#ThisType,
ClTermCode,
Array[Int],
ClTermCode,
ClTypeCode,
ArrayTerm with ArrayParameter[LocalElement] { type Element = LocalElement }]
protected trait ClArraySingleton extends super.ArraySingletonApi {
def parameter[Element0 <: ValueTerm](id: Any, padding: Element0, shape: Array[Int]): ArrayTerm {
type Element = Element0
} = {
val elementType = padding.valueType
val arrayDefinition = ArrayDefinition(elementType.typeSymbol.firstDefinition, shape)
val arrayTypeSymbol = cachedSymbol(arrayDefinition)
val termCode = freshName(id.toString)
arrayParameterFactory[Element0].newInstance(elementType,
padding.termCode,
shape,
termCode,
arrayTypeSymbol.typeCode)
}
}
type ArraySingleton <: ClArraySingleton
protected trait ArrayFill extends super.ArrayTermApi with ClTerm { this: ArrayTerm =>
def termCode: ClTermCode = extract.termCode
def typeCode: ClTypeCode = extract.typeCode
def transform(matrix: MatrixData): ThisTerm = {
this.asInstanceOf[ThisTerm]
}
val extract: Element
}
@inject
protected def arrayFillFactory[LocalElement <: ValueTerm]
: Factory1[LocalElement, ArrayTerm with ArrayFill { type Element = LocalElement }]
protected trait ClValueTerm extends ElementTermApi with ClTerm { thisValue: ValueTerm =>
val termCode: ClTermCode
def valueType: ThisType
def typeCode: ClTypeCode = valueType.typeSymbol.typeCode
def fill: ArrayTerm { type Element = thisValue.ThisTerm } = {
arrayFillFactory[thisValue.ThisTerm].newInstance(this.asInstanceOf[ThisTerm])
}
}
type ValueTerm <: (Term with Any) with ClValueTerm
protected trait ClFloatTerm extends super.FloatTermApi with ValueTermApi { this: FloatTerm =>
def valueType: ThisType = float
def unary_- : FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const $typeCode $valueTermName = -$termCode;
"""
float.termFactory.newInstance(valueTermName)
}
def unary_+ : FloatTerm = {
float.termFactory.newInstance(termCode)
}
def +(rightHandSide: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const $typeCode $valueTermName = $termCode + ${rightHandSide.termCode};
"""
float.termFactory.newInstance(valueTermName)
}
def -(rightHandSide: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const $typeCode $valueTermName = $termCode - ${rightHandSide.termCode};
"""
float.termFactory.newInstance(valueTermName)
}
def *(rightHandSide: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const $typeCode $valueTermName = $termCode * ${rightHandSide.termCode};
"""
float.termFactory.newInstance(valueTermName)
}
def /(rightHandSide: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const $typeCode $valueTermName = $termCode / ${rightHandSide.termCode};
"""
float.termFactory.newInstance(valueTermName)
}
def %(rightHandSide: FloatTerm): FloatTerm = {
val valueTermName = freshName("")
localDefinitions += fastraw"""
const $typeCode $valueTermName = $termCode % ${rightHandSide.termCode};
"""
float.termFactory.newInstance(valueTermName)
}
}
type FloatTerm <: (ValueTerm with Any) with ClFloatTerm
trait ClTupleTerm extends TupleTermApi with ClValueTerm { thisTupleTerm: TupleTerm =>
def split: Seq[Element] = new IndexedSeq[Element] {
def length: Int = thisTupleTerm.length
def apply(index: Int): Element = {
val elementTermName = freshName("")
localDefinitions += fastraw"""
const ${elementType.typeSymbol.typeCode} $elementTermName = $termCode.tuple_data[$index];
"""
valueType.term(elementTermName).asInstanceOf[Element]
}
}
def valueType: ThisType = clTupleTypeFactory[Element].newInstance(elementType, length).asInstanceOf[ThisType]
val elementType: ValueType
val length: Int
}
type TupleTerm <: (ValueTerm with Any) with ClTupleTerm
@inject
protected def tupleTermFactory[LocalElement <: ValueTerm]
: Factory3[ValueType, Int, ClTermCode, TupleTerm { type Element = LocalElement }]
protected trait ClTupleType extends TupleTypeApi with ClValueType { thisTupleType: TupleType =>
def typeSymbol: ClTypeSymbol = {
val tupleDefinition = TupleDefinition(elementType.typeSymbol.firstDefinition, length)
cachedSymbol(tupleDefinition)
}
def term(code: ClTermCode): ThisTerm = {
tupleTermFactory.newInstance(elementType, length, code)
}
val elementType: ValueType
val length: Int
}
type TupleType <: (ValueType with Any) with ClTupleType
@inject protected def clTupleTypeFactory[LocalElement <: ValueTerm]
: Factory2[ValueType, Int, TupleType { type Element = LocalElement }]
protected trait ClTupleSingleton extends TupleSingletonApi {
def apply(element: ValueType, length: Int): TupleType { type Element = element.ThisTerm } = {
clTupleTypeFactory[element.ThisTerm].newInstance(element, length)
}
def parameter(id: Any, element: ValueType, length: Int): TupleTerm { type Element = element.ThisTerm } = {
val termCode = freshName(id.toString)
tupleTermFactory[element.ThisTerm].newInstance(element, length, termCode)
}
def join[Element0 <: ValueTerm](elements: Element0*): TupleTerm {
type Element = Element0
} = {
val elementType = elements.head.valueType
val tupleType = clTupleTypeFactory[Element0].newInstance(elementType, elements.length)
val tupleTermName = freshName("")
localDefinitions += fastraw"""
const ${tupleType.typeSymbol.typeCode} $tupleTermName = {{
${elements.map(_.termCode).mkFastring(""",
""")}
}};
"""
tupleType
.term(tupleTermName)
.asInstanceOf[TupleTerm {
type Element = Element0
}]
}
}
type TupleSingleton <: ClTupleSingleton
}