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package tensor
import "github.com/pkg/errors"
// public API for comparison ops
// Lt performs a elementwise less than comparison (a < b). a and b can either be float64 or *Dense.
// It returns the same Tensor type as its input.
//
// If both operands are *Dense, shape is checked first.
// Even though the underlying data may have the same size (say (2,2) vs (4,1)), if they have different shapes, it will error out.
func Lt(a, b interface{}, opts ...FuncOpt) (retVal Tensor, err error) {
var lter Lter
var ok bool
switch at := a.(type) {
case Tensor:
lter, ok = at.Engine().(Lter)
switch bt := b.(type) {
case Tensor:
if !bt.Shape().IsScalar() && !at.Shape().IsScalar() { // non-scalar Tensor comparison
if !ok {
if lter, ok = bt.Engine().(Lter); !ok {
return nil, errors.Errorf("Neither operands have engines that support Lt")
}
}
return lter.Lt(at, bt, opts...)
} else {
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 !ok {
return nil, errors.Errorf("Engine does not support Lt")
}
return lter.LtScalar(at, bt, leftTensor, opts...)
}
default:
if !ok {
return nil, errors.Errorf("Engine does not support Lt")
}
return lter.LtScalar(at, bt, true, opts...)
}
default:
switch bt := b.(type) {
case Tensor:
if lter, ok = bt.Engine().(Lter); !ok {
return nil, errors.Errorf("Engine does not support Lt")
}
return lter.LtScalar(bt, at, false, opts...)
default:
return nil, errors.Errorf("Unable to perform Lt on %T and %T", a, b)
}
}
}
// Gt performs a elementwise greater than comparison (a > b). a and b can either be float64 or *Dense.
// It returns the same Tensor type as its input.
//
// If both operands are *Dense, shape is checked first.
// Even though the underlying data may have the same size (say (2,2) vs (4,1)), if they have different shapes, it will error out.
func Gt(a, b interface{}, opts ...FuncOpt) (retVal Tensor, err error) {
var gter Gter
var ok bool
switch at := a.(type) {
case Tensor:
gter, ok = at.Engine().(Gter)
switch bt := b.(type) {
case Tensor:
if !bt.Shape().IsScalar() && !at.Shape().IsScalar() { // non-scalar Tensor comparison
if !ok {
if gter, ok = bt.Engine().(Gter); !ok {
return nil, errors.Errorf("Neither operands have engines that support Gt")
}
}
return gter.Gt(at, bt, opts...)
} else {
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 !ok {
return nil, errors.Errorf("Engine does not support Gt")
}
return gter.GtScalar(at, bt, leftTensor, opts...)
}
default:
if !ok {
return nil, errors.Errorf("Engine does not support Gt")
}
return gter.GtScalar(at, bt, true, opts...)
}
default:
switch bt := b.(type) {
case Tensor:
if gter, ok = bt.Engine().(Gter); !ok {
return nil, errors.Errorf("Engine does not support Gt")
}
return gter.GtScalar(bt, at, false, opts...)
default:
return nil, errors.Errorf("Unable to perform Gt on %T and %T", a, b)
}
}
}
// Lte performs a elementwise less than eq comparison (a <= b). a and b can either be float64 or *Dense.
// It returns the same Tensor type as its input.
//
// If both operands are *Dense, shape is checked first.
// Even though the underlying data may have the same size (say (2,2) vs (4,1)), if they have different shapes, it will error out.
func Lte(a, b interface{}, opts ...FuncOpt) (retVal Tensor, err error) {
var lteer Lteer
var ok bool
switch at := a.(type) {
case Tensor:
lteer, ok = at.Engine().(Lteer)
switch bt := b.(type) {
case Tensor:
if !bt.Shape().IsScalar() && !at.Shape().IsScalar() { // non-scalar Tensor comparison
if !ok {
if lteer, ok = bt.Engine().(Lteer); !ok {
return nil, errors.Errorf("Neither operands have engines that support Lte")
}
}
return lteer.Lte(at, bt, opts...)
} else {
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 !ok {
return nil, errors.Errorf("Engine does not support Lte")
}
return lteer.LteScalar(at, bt, leftTensor, opts...)
}
default:
if !ok {
return nil, errors.Errorf("Engine does not support Lte")
}
return lteer.LteScalar(at, bt, true, opts...)
}
default:
switch bt := b.(type) {
case Tensor:
if lteer, ok = bt.Engine().(Lteer); !ok {
return nil, errors.Errorf("Engine does not support Lte")
}
return lteer.LteScalar(bt, at, false, opts...)
default:
return nil, errors.Errorf("Unable to perform Lte on %T and %T", a, b)
}
}
}
// Gte performs a elementwise greater than eq comparison (a >= b). a and b can either be float64 or *Dense.
// It returns the same Tensor type as its input.
//
// If both operands are *Dense, shape is checked first.
// Even though the underlying data may have the same size (say (2,2) vs (4,1)), if they have different shapes, it will error out.
func Gte(a, b interface{}, opts ...FuncOpt) (retVal Tensor, err error) {
var gteer Gteer
var ok bool
switch at := a.(type) {
case Tensor:
gteer, ok = at.Engine().(Gteer)
switch bt := b.(type) {
case Tensor:
if !bt.Shape().IsScalar() && !at.Shape().IsScalar() { // non-scalar Tensor comparison
if !ok {
if gteer, ok = bt.Engine().(Gteer); !ok {
return nil, errors.Errorf("Neither operands have engines that support Gte")
}
}
return gteer.Gte(at, bt, opts...)
} else {
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 !ok {
return nil, errors.Errorf("Engine does not support Gte")
}
return gteer.GteScalar(at, bt, leftTensor, opts...)
}
default:
if !ok {
return nil, errors.Errorf("Engine does not support Gte")
}
return gteer.GteScalar(at, bt, true, opts...)
}
default:
switch bt := b.(type) {
case Tensor:
if gteer, ok = bt.Engine().(Gteer); !ok {
return nil, errors.Errorf("Engine does not support Gte")
}
return gteer.GteScalar(bt, at, false, opts...)
default:
return nil, errors.Errorf("Unable to perform Gte on %T and %T", a, b)
}
}
}
// ElEq performs a elementwise equality comparison (a == b). a and b can either be float64 or *Dense.
// It returns the same Tensor type as its input.
//
// If both operands are *Dense, shape is checked first.
// Even though the underlying data may have the same size (say (2,2) vs (4,1)), if they have different shapes, it will error out.
func ElEq(a, b interface{}, opts ...FuncOpt) (retVal Tensor, err error) {
var eleqer ElEqer
var ok bool
switch at := a.(type) {
case Tensor:
eleqer, ok = at.Engine().(ElEqer)
switch bt := b.(type) {
case Tensor:
if !bt.Shape().IsScalar() && !at.Shape().IsScalar() { // non-scalar Tensor comparison
if !ok {
if eleqer, ok = bt.Engine().(ElEqer); !ok {
return nil, errors.Errorf("Neither operands have engines that support ElEq")
}
}
return eleqer.ElEq(at, bt, opts...)
} else {
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 !ok {
return nil, errors.Errorf("Engine does not support ElEq")
}
return eleqer.EqScalar(at, bt, leftTensor, opts...)
}
default:
if !ok {
return nil, errors.Errorf("Engine does not support ElEq")
}
return eleqer.EqScalar(at, bt, true, opts...)
}
default:
switch bt := b.(type) {
case Tensor:
if eleqer, ok = bt.Engine().(ElEqer); !ok {
return nil, errors.Errorf("Engine does not support ElEq")
}
return eleqer.EqScalar(bt, at, false, opts...)
default:
return nil, errors.Errorf("Unable to perform ElEq on %T and %T", a, b)
}
}
}
// ElNe performs a elementwise equality comparison (a != b). a and b can either be float64 or *Dense.
// It returns the same Tensor type as its input.
//
// If both operands are *Dense, shape is checked first.
// Even though the underlying data may have the same size (say (2,2) vs (4,1)), if they have different shapes, it will error out.
func ElNe(a, b interface{}, opts ...FuncOpt) (retVal Tensor, err error) {
var eleqer ElEqer
var ok bool
switch at := a.(type) {
case Tensor:
eleqer, ok = at.Engine().(ElEqer)
switch bt := b.(type) {
case Tensor:
if !ok {
if eleqer, ok = bt.Engine().(ElEqer); !ok {
return nil, errors.Errorf("Neither operands have engines that support ElEq")
}
}
return eleqer.ElNe(at, bt, opts...)
default:
if !ok {
return nil, errors.Errorf("Engine does not support ElEq")
}
return eleqer.NeScalar(at, bt, true, opts...)
}
default:
switch bt := b.(type) {
case Tensor:
if eleqer, ok = bt.Engine().(ElEqer); !ok {
return nil, errors.Errorf("Engine does not support ElEq")
}
return eleqer.NeScalar(bt, at, false, opts...)
default:
return nil, errors.Errorf("Unable to perform ElEq on %T and %T", a, b)
}
}
}
|
