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package tensor
import "github.com/pkg/errors"
func MinBetween(a, b interface{}, opts ...FuncOpt) (retVal Tensor, err error) {
var minbetweener MinBetweener
var oe standardEngine
var ok bool
switch at := a.(type) {
case Tensor:
oe = at.standardEngine()
switch bt := b.(type) {
case Tensor:
if !bt.Shape().IsScalar() && !at.Shape().IsScalar() { // non-scalar Tensor addition
if oe != nil {
return oe.MinBetween(at, bt, opts...)
}
if oe = bt.standardEngine(); oe != nil {
return oe.MinBetween(at, bt, opts...)
}
if minbetweener, ok = at.Engine().(MinBetweener); ok {
return minbetweener.MinBetween(at, bt, opts...)
}
if minbetweener, ok = bt.Engine().(MinBetweener); ok {
return minbetweener.MinBetween(at, bt, opts...)
}
return nil, errors.New("Neither engines of either operand support MinBetween")
} else { // at least one of the operands is a scalar
var leftTensor bool
if !bt.Shape().IsScalar() {
leftTensor = false // a Scalar-Tensor * b Tensor
tmp := at
at = bt
bt = tmp
} else {
leftTensor = true // a Tensor * b Scalar-Tensor
}
if oe != nil {
return oe.MinBetweenScalar(at, bt, leftTensor, opts...)
}
if oe = bt.standardEngine(); oe != nil {
return oe.MinBetweenScalar(at, bt, leftTensor, opts...)
}
if minbetweener, ok = at.Engine().(MinBetweener); ok {
return minbetweener.MinBetweenScalar(at, bt, leftTensor, opts...)
}
if minbetweener, ok = bt.Engine().(MinBetweener); ok {
return minbetweener.MinBetweenScalar(at, bt, leftTensor, opts...)
}
return nil, errors.New("Neither engines of either operand support MinBetween")
}
default:
if oe != nil {
return oe.MinBetweenScalar(at, bt, true, opts...)
}
if minbetweener, ok = at.Engine().(MinBetweener); ok {
return minbetweener.MinBetweenScalar(at, bt, true, opts...)
}
return nil, errors.New("Operand A's engine does not support MinBetween")
}
default:
switch bt := b.(type) {
case Tensor:
if oe = bt.standardEngine(); oe != nil {
return oe.MinBetweenScalar(bt, at, false, opts...)
}
if minbetweener, ok = bt.Engine().(MinBetweener); ok {
return minbetweener.MinBetweenScalar(bt, at, false, opts...)
}
return nil, errors.New("Operand B's engine does not support MinBetween")
default:
return nil, errors.Errorf("Cannot perform MinBetween of %T and %T", a, b)
}
}
panic("Unreachable")
}
func MaxBetween(a, b interface{}, opts ...FuncOpt) (retVal Tensor, err error) {
var maxbetweener MaxBetweener
var oe standardEngine
var ok bool
switch at := a.(type) {
case Tensor:
oe = at.standardEngine()
switch bt := b.(type) {
case Tensor:
if !bt.Shape().IsScalar() && !at.Shape().IsScalar() { // non-scalar Tensor addition
if oe != nil {
return oe.MaxBetween(at, bt, opts...)
}
if oe = bt.standardEngine(); oe != nil {
return oe.MaxBetween(at, bt, opts...)
}
if maxbetweener, ok = at.Engine().(MaxBetweener); ok {
return maxbetweener.MaxBetween(at, bt, opts...)
}
if maxbetweener, ok = bt.Engine().(MaxBetweener); ok {
return maxbetweener.MaxBetween(at, bt, opts...)
}
return nil, errors.New("Neither engines of either operand support MaxBetween")
} else { // at least one of the operands is a scalar
var leftTensor bool
if !bt.Shape().IsScalar() {
leftTensor = false // a Scalar-Tensor * b Tensor
tmp := at
at = bt
bt = tmp
} else {
leftTensor = true // a Tensor * b Scalar-Tensor
}
if oe != nil {
return oe.MaxBetweenScalar(at, bt, leftTensor, opts...)
}
if oe = bt.standardEngine(); oe != nil {
return oe.MaxBetweenScalar(at, bt, leftTensor, opts...)
}
if maxbetweener, ok = at.Engine().(MaxBetweener); ok {
return maxbetweener.MaxBetweenScalar(at, bt, leftTensor, opts...)
}
if maxbetweener, ok = bt.Engine().(MaxBetweener); ok {
return maxbetweener.MaxBetweenScalar(at, bt, leftTensor, opts...)
}
return nil, errors.New("Neither engines of either operand support MaxBetween")
}
default:
if oe != nil {
return oe.MaxBetweenScalar(at, bt, true, opts...)
}
if maxbetweener, ok = at.Engine().(MaxBetweener); ok {
return maxbetweener.MaxBetweenScalar(at, bt, true, opts...)
}
return nil, errors.New("Operand A's engine does not support MaxBetween")
}
default:
switch bt := b.(type) {
case Tensor:
if oe = bt.standardEngine(); oe != nil {
return oe.MaxBetweenScalar(bt, at, false, opts...)
}
if maxbetweener, ok = bt.Engine().(MaxBetweener); ok {
return maxbetweener.MaxBetweenScalar(bt, at, false, opts...)
}
return nil, errors.New("Operand B's engine does not support MaxBetween")
default:
return nil, errors.Errorf("Cannot perform MaxBetween of %T and %T", a, b)
}
}
panic("Unreachable")
}
|
