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// Copyright ©2017 The Gonum Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package c64
import (
"testing"
"gonum.org/v1/gonum/cmplxs/cscalar"
)
func same(x, y complex64) bool {
return cscalar.Same(complex128(x), complex128(y))
}
func guardVector(vec []complex64, gdVal complex64, gdLen int) (guarded []complex64) {
guarded = make([]complex64, len(vec)+gdLen*2)
copy(guarded[gdLen:], vec)
for i := 0; i < gdLen; i++ {
guarded[i] = gdVal
guarded[len(guarded)-1-i] = gdVal
}
return guarded
}
func isValidGuard(vec []complex64, gdVal complex64, gdLen int) bool {
for i := 0; i < gdLen; i++ {
if !same(vec[i], gdVal) || !same(vec[len(vec)-1-i], gdVal) {
return false
}
}
return true
}
func guardIncVector(vec []complex64, gdVal complex64, inc, gdLen int) (guarded []complex64) {
if inc < 0 {
inc = -inc
}
inrLen := len(vec) * inc
guarded = make([]complex64, inrLen+gdLen*2)
for i := range guarded {
guarded[i] = gdVal
}
for i, v := range vec {
guarded[gdLen+i*inc] = v
}
return guarded
}
func checkValidIncGuard(t *testing.T, vec []complex64, gdVal complex64, inc, gdLen int) {
srcLen := len(vec) - 2*gdLen
if inc < 0 {
srcLen = len(vec) * -inc
}
for i := range vec {
switch {
case same(vec[i], gdVal):
// Correct value
case (i-gdLen)%inc == 0 && (i-gdLen)/inc < len(vec):
// Ignore input values
case i < gdLen:
t.Errorf("Front guard violated at %d %v", i, vec[:gdLen])
case i > gdLen+srcLen:
t.Errorf("Back guard violated at %d %v", i-gdLen-srcLen, vec[gdLen+srcLen:])
default:
t.Errorf("Internal guard violated at %d %v", i-gdLen, vec[gdLen:gdLen+srcLen])
}
}
}
var ( // Offset sets for testing alignment handling in Unitary assembly functions.
align1 = []int{0, 1}
align2 = newIncSet(0, 1)
align3 = newIncToSet(0, 1)
)
type incSet struct {
x, y int
}
// genInc will generate all (x,y) combinations of the input increment set.
func newIncSet(inc ...int) []incSet {
n := len(inc)
is := make([]incSet, n*n)
for x := range inc {
for y := range inc {
is[x*n+y] = incSet{inc[x], inc[y]}
}
}
return is
}
type incToSet struct {
dst, x, y int
}
// genIncTo will generate all (dst,x,y) combinations of the input increment set.
func newIncToSet(inc ...int) []incToSet {
n := len(inc)
is := make([]incToSet, n*n*n)
for i, dst := range inc {
for x := range inc {
for y := range inc {
is[i*n*n+x*n+y] = incToSet{dst, inc[x], inc[y]}
}
}
}
return is
}
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