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diplomacy: remove node arity and allow empty Nexus nodes (Xbars)

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This removes the mostly obsolete 'numIn/Out' range restrictions on nodes.
It also makes it possible to connect optional crossbars that disappear.

val x = TLXbar()
x := master
slave := x

val y = TLXbar()
x :=* y // only connect y if it gets used

This will create crossbar x, but crossbar y will disappear.
This commit is contained in:
Wesley W. Terpstra
2017-11-30 14:43:43 -08:00
parent 6a25a3b7ac
commit e489c4226e
16 changed files with 155 additions and 182 deletions
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78
src/main/scala/diplomacy/Nodes.scala
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@@ -188,18 +188,12 @@ object NodeBinding
trait InwardNode[DI, UI, BI <: Data] extends BaseNode
{
protected[diplomacy] val numPI: Range.Inclusive
require (!numPI.isEmpty, s"No number of inputs would be acceptable to ${name}${lazyModule.line}")
require (numPI.start >= 0, s"${name} accepts a negative number of inputs${lazyModule.line}")
private val accPI = ListBuffer[(Int, OutwardNode[DI, UI, BI], NodeBinding, Parameters, SourceInfo)]()
private var iRealized = false
protected[diplomacy] def iPushed = accPI.size
protected[diplomacy] def iPush(index: Int, node: OutwardNode[DI, UI, BI], binding: NodeBinding)(implicit p: Parameters, sourceInfo: SourceInfo) {
val info = sourceLine(sourceInfo, " at ", "")
val noIs = numPI.size == 1 && numPI.contains(0)
require (!noIs, s"${name}${lazyModule.line} was incorrectly connected as a sink" + info)
require (!iRealized, s"${name}${lazyModule.line} was incorrectly connected as a sink after its .module was used" + info)
accPI += ((index, node, binding, p, sourceInfo))
}
@@ -222,18 +216,12 @@ trait OutwardNodeHandle[DO, UO, EO, BO <: Data] extends NoHandle
trait OutwardNode[DO, UO, BO <: Data] extends BaseNode
{
protected[diplomacy] val numPO: Range.Inclusive
require (!numPO.isEmpty, s"No number of outputs would be acceptable to ${name}${lazyModule.line}")
require (numPO.start >= 0, s"${name} accepts a negative number of outputs${lazyModule.line}")
private val accPO = ListBuffer[(Int, InwardNode [DO, UO, BO], NodeBinding, Parameters, SourceInfo)]()
private var oRealized = false
protected[diplomacy] def oPushed = accPO.size
protected[diplomacy] def oPush(index: Int, node: InwardNode [DO, UO, BO], binding: NodeBinding)(implicit p: Parameters, sourceInfo: SourceInfo) {
val info = sourceLine(sourceInfo, " at ", "")
val noOs = numPO.size == 1 && numPO.contains(0)
require (!noOs, s"${name}${lazyModule.line} was incorrectly connected as a source" + info)
require (!oRealized, s"${name}${lazyModule.line} was incorrectly connected as a source after its .module was used" + info)
accPO += ((index, node, binding, p, sourceInfo))
}
@@ -255,8 +243,6 @@ case class Edges[EI, EO](in: EI, out: EO)
sealed abstract class MixedNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data](
val inner: InwardNodeImp [DI, UI, EI, BI],
val outer: OutwardNodeImp[DO, UO, EO, BO])(
protected[diplomacy] val numPO: Range.Inclusive,
protected[diplomacy] val numPI: Range.Inclusive)(
implicit valName: ValName)
extends BaseNode with NodeHandle[DI, UI, EI, BI, DO, UO, EO, BO] with InwardNode[DI, UI, BI] with OutwardNode[DO, UO, BO]
{
@@ -292,8 +278,6 @@ sealed abstract class MixedNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data](
case BIND_STAR => iStar }}.scanLeft(0)(_+_)
val oTotal = oSum.lastOption.getOrElse(0)
val iTotal = iSum.lastOption.getOrElse(0)
require(numPO.contains(oTotal), s"${name} has ${oTotal} outputs, expected ${numPO}${lazyModule.line}")
require(numPI.contains(iTotal), s"${name} has ${iTotal} inputs, expected ${numPI}${lazyModule.line}")
(oSum.init zip oSum.tail, iSum.init zip iSum.tail, oStar, iStar)
} catch {
case c: StarCycleException => throw c.copy(loop = s"${name}${lazyModule.line}" +: c.loop)
@@ -417,10 +401,8 @@ sealed abstract class MixedNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data](
abstract class MixedCustomNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data](
inner: InwardNodeImp [DI, UI, EI, BI],
outer: OutwardNodeImp[DO, UO, EO, BO])(
numPO: Range.Inclusive,
numPI: Range.Inclusive)(
implicit valName: ValName)
extends MixedNode(inner, outer)(numPO, numPI)
extends MixedNode(inner, outer)
{
def resolveStar(iKnown: Int, oKnown: Int, iStars: Int, oStars: Int): (Int, Int)
def mapParamsD(n: Int, p: Seq[DI]): Seq[DO]
@@ -428,28 +410,28 @@ abstract class MixedCustomNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data](
}
abstract class CustomNode[D, U, EO, EI, B <: Data](imp: NodeImp[D, U, EO, EI, B])(
numPO: Range.Inclusive,
numPI: Range.Inclusive)(
implicit valName: ValName)
extends MixedCustomNode(imp, imp)(numPO, numPI)
extends MixedCustomNode(imp, imp)
class MixedAdapterNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data](
inner: InwardNodeImp [DI, UI, EI, BI],
outer: OutwardNodeImp[DO, UO, EO, BO])(
dFn: DI => DO,
uFn: UO => UI,
num: Range.Inclusive = 0 to 999)(
uFn: UO => UI)(
implicit valName: ValName)
extends MixedNode(inner, outer)(num, num)
extends MixedNode(inner, outer)
{
protected[diplomacy] def resolveStar(iKnown: Int, oKnown: Int, iStars: Int, oStars: Int): (Int, Int) = {
require (oStars + iStars <= 1, s"${name} (an adapter) appears left of a :*= ${iStars} times and right of a :=* ${oStars} times; at most once is allowed${lazyModule.line}")
if (oStars > 0) {
require (iKnown >= oKnown, s"${name} (an adapter) has ${oKnown} outputs and ${iKnown} inputs; cannot assign ${iKnown-oKnown} edges to resolve :=*${lazyModule.line}")
(0, iKnown - oKnown)
} else {
} else if (iStars > 0) {
require (oKnown >= iKnown, s"${name} (an adapter) has ${oKnown} outputs and ${iKnown} inputs; cannot assign ${oKnown-iKnown} edges to resolve :*=${lazyModule.line}")
(oKnown - iKnown, 0)
} else {
require (oKnown == iKnown, s"${name} (an adapter) has ${oKnown} outputs and ${iKnown} inputs; these do not match")
(0, 0)
}
}
protected[diplomacy] def mapParamsD(n: Int, p: Seq[DI]): Seq[DO] = {
@@ -464,10 +446,9 @@ class MixedAdapterNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data](
class AdapterNode[D, U, EO, EI, B <: Data](imp: NodeImp[D, U, EO, EI, B])(
dFn: D => D,
uFn: U => U,
num: Range.Inclusive = 0 to 999)(
uFn: U => U)(
implicit valName: ValName)
extends MixedAdapterNode[D, U, EI, B, D, U, EO, B](imp, imp)(dFn, uFn, num)
extends MixedAdapterNode[D, U, EI, B, D, U, EO, B](imp, imp)(dFn, uFn)
// IdentityNodes automatically connect their inputs to outputs
class IdentityNode[D, U, EO, EI, B <: Data](imp: NodeImp[D, U, EO, EI, B])()(implicit valName: ValName)
@@ -486,39 +467,39 @@ class MixedNexusNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data](
outer: OutwardNodeImp[DO, UO, EO, BO])(
dFn: Seq[DI] => DO,
uFn: Seq[UO] => UI,
numPO: Range.Inclusive = 1 to 999,
numPI: Range.Inclusive = 1 to 999)(
// no inputs and no outputs is always allowed
inputRequiresOutput: Boolean = true,
outputRequiresInput: Boolean = true)(
implicit valName: ValName)
extends MixedNode(inner, outer)(numPO, numPI)
extends MixedNode(inner, outer)
{
// require (numPO.end >= 1, s"${name} does not accept outputs${lazyModule.line}")
// require (numPI.end >= 1, s"${name} does not accept inputs${lazyModule.line}")
protected[diplomacy] def resolveStar(iKnown: Int, oKnown: Int, iStars: Int, oStars: Int): (Int, Int) = {
require (iStars == 0, s"${name} (a nexus) appears left of :*= (perhaps you should flip the '*' to :=*?)${lazyModule.line}")
require (oStars == 0, s"${name} (a nexus) appears right of a :=* (perhaps you should flip the '*' to :*=?)${lazyModule.line}")
(0, 0)
// a nexus treats :=* as a weak pointer
require (!outputRequiresInput || oKnown == 0 || iStars + iKnown != 0, s"${name} (a nexus) has ${oKnown} required outputs and no possible inputs")
require (!inputRequiresOutput || iKnown == 0 || oStars + oKnown != 0, s"${name} (a nexus) has ${iKnown} required inputs and no possible outputs")
if (iKnown == 0 && oKnown == 0) (0, 0) else (1, 1)
}
protected[diplomacy] def mapParamsD(n: Int, p: Seq[DI]): Seq[DO] = { val a = dFn(p); Seq.fill(n)(a) }
protected[diplomacy] def mapParamsU(n: Int, p: Seq[UO]): Seq[UI] = { val a = uFn(p); Seq.fill(n)(a) }
protected[diplomacy] def mapParamsD(n: Int, p: Seq[DI]): Seq[DO] = { if (n > 0) { val a = dFn(p); Seq.fill(n)(a) } else Nil }
protected[diplomacy] def mapParamsU(n: Int, p: Seq[UO]): Seq[UI] = { if (n > 0) { val a = uFn(p); Seq.fill(n)(a) } else Nil }
}
class NexusNode[D, U, EO, EI, B <: Data](imp: NodeImp[D, U, EO, EI, B])(
dFn: Seq[D] => D,
uFn: Seq[U] => U,
numPO: Range.Inclusive = 1 to 999,
numPI: Range.Inclusive = 1 to 999)(
inputRequiresOutput: Boolean = true,
outputRequiresInput: Boolean = true)(
implicit valName: ValName)
extends MixedNexusNode[D, U, EI, B, D, U, EO, B](imp, imp)(dFn, uFn, numPO, numPI)
extends MixedNexusNode[D, U, EI, B, D, U, EO, B](imp, imp)(dFn, uFn, inputRequiresOutput, outputRequiresInput)
// There are no Mixed SourceNodes
class SourceNode[D, U, EO, EI, B <: Data](imp: NodeImp[D, U, EO, EI, B])(po: Seq[D])(implicit valName: ValName)
extends MixedNode(imp, imp)(po.size to po.size, 0 to 0)
extends MixedNode(imp, imp)
{
protected[diplomacy] def resolveStar(iKnown: Int, oKnown: Int, iStars: Int, oStars: Int): (Int, Int) = {
require (oStars <= 1, s"${name} (a source) appears right of a :=* ${oStars} times; at most once is allowed${lazyModule.line}")
require (iStars == 0, s"${name} (a source) cannot appear left of a :*=${lazyModule.line}")
require (iKnown == 0, s"${name} (a source) cannot appear left of a :=${lazyModule.line}")
require (po.size == oKnown || oStars == 1, s"${name} (a source) has only ${oKnown} outputs connected out of ${po.size}")
require (po.size >= oKnown, s"${name} (a source) has ${oKnown} outputs out of ${po.size}; cannot assign ${po.size - oKnown} edges to resolve :=*${lazyModule.line}")
(0, po.size - oKnown)
}
@@ -528,12 +509,13 @@ class SourceNode[D, U, EO, EI, B <: Data](imp: NodeImp[D, U, EO, EI, B])(po: Seq
// There are no Mixed SinkNodes
class SinkNode[D, U, EO, EI, B <: Data](imp: NodeImp[D, U, EO, EI, B])(pi: Seq[U])(implicit valName: ValName)
extends MixedNode(imp, imp)(0 to 0, pi.size to pi.size)
extends MixedNode(imp, imp)
{
protected[diplomacy] def resolveStar(iKnown: Int, oKnown: Int, iStars: Int, oStars: Int): (Int, Int) = {
require (iStars <= 1, s"${name} (a sink) appears left of a :*= ${iStars} times; at most once is allowed${lazyModule.line}")
require (oStars == 0, s"${name} (a sink) cannot appear right of a :=*${lazyModule.line}")
require (oKnown == 0, s"${name} (a sink) cannot appear right of a :=${lazyModule.line}")
require (pi.size == iKnown || iStars == 1, s"${name} (a sink) has only ${iKnown} inputs connected out of ${pi.size}")
require (pi.size >= iKnown, s"${name} (a sink) has ${iKnown} inputs out of ${pi.size}; cannot assign ${pi.size - iKnown} edges to resolve :*=${lazyModule.line}")
(pi.size - iKnown, 0)
}
@@ -544,9 +526,7 @@ class SinkNode[D, U, EO, EI, B <: Data](imp: NodeImp[D, U, EO, EI, B])(pi: Seq[U
class MixedTestNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data] protected[diplomacy](
node: NodeHandle [DI, UI, EI, BI, DO, UO, EO, BO], clone: CloneLazyModule)(
implicit valName: ValName)
extends MixedNode(node.inner, node.outer)(
numPI = node.inward .uiParams.size to node.inward .uiParams.size,
numPO = node.outward.doParams.size to node.outward.doParams.size)
extends MixedNode(node.inner, node.outer)
{
// The devices connected to this test node must recreate these parameters:
def iParams: Seq[DI] = node.inward .diParams
@@ -555,6 +535,8 @@ class MixedTestNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data] protected[di
protected[diplomacy] def resolveStar(iKnown: Int, oKnown: Int, iStars: Int, oStars: Int): (Int, Int) = {
require (oStars <= 1, s"${name} (a test node) appears right of a :=* ${oStars} times; at most once is allowed${lazyModule.line}")
require (iStars <= 1, s"${name} (a test node) appears left of a :*= ${iStars} times; at most once is allowed${lazyModule.line}")
require (node.inward .uiParams.size == iKnown || iStars == 1, s"${name} (a test node) has only ${iKnown} inputs connected out of ${node.inward.uiParams.size}")
require (node.outward.doParams.size == oKnown || oStars == 1, s"${name} (a test node) has only ${oKnown} outputs connected out of ${node.outward.doParams.size}")
(node.inward.uiParams.size - iKnown, node.outward.doParams.size - oKnown)
}