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129 lines
3.1 KiB
Go
129 lines
3.1 KiB
Go
// Copyright ©2016 The Gonum Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package c128
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import (
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"math"
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"testing"
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)
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const (
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msgVal = "%v: unexpected value at %v Got: %v Expected: %v"
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msgGuard = "%v: Guard violated in %s vector %v %v"
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)
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var (
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inf = math.Inf(1)
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benchSink complex128
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)
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func same(x, y complex128) bool {
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return (x == y ||
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math.IsNaN(real(x)) && math.IsNaN(real(y)) && imag(x) == imag(y) ||
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math.IsNaN(imag(y)) && math.IsNaN(imag(x)) && real(y) == real(x) ||
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math.IsNaN(real(x)) && math.IsNaN(real(y)) && math.IsNaN(imag(y)) && math.IsNaN(imag(x)))
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}
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func guardVector(vec []complex128, guard_val complex128, guard_len int) (guarded []complex128) {
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guarded = make([]complex128, len(vec)+guard_len*2)
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copy(guarded[guard_len:], vec)
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for i := 0; i < guard_len; i++ {
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guarded[i] = guard_val
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guarded[len(guarded)-1-i] = guard_val
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}
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return guarded
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}
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func isValidGuard(vec []complex128, guard_val complex128, guard_len int) bool {
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for i := 0; i < guard_len; i++ {
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if vec[i] != guard_val || vec[len(vec)-1-i] != guard_val {
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return false
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}
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}
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return true
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}
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func guardIncVector(vec []complex128, guard_val complex128, inc, guard_len int) (guarded []complex128) {
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s_ln := len(vec) * inc
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if inc < 0 {
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s_ln = len(vec) * -inc
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}
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guarded = make([]complex128, s_ln+guard_len*2)
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for i, cas := 0, 0; i < len(guarded); i++ {
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switch {
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case i < guard_len, i > guard_len+s_ln:
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guarded[i] = guard_val
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case (i-guard_len)%(inc) == 0 && cas < len(vec):
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guarded[i] = vec[cas]
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cas++
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default:
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guarded[i] = guard_val
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}
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}
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return guarded
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}
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func checkValidIncGuard(t *testing.T, vec []complex128, guard_val complex128, inc, guard_len int) {
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s_ln := len(vec) - 2*guard_len
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if inc < 0 {
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s_ln = len(vec) * -inc
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}
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for i := range vec {
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switch {
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case vec[i] == guard_val:
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// Correct value
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case i < guard_len:
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t.Errorf("Front guard violated at %d %v", i, vec[:guard_len])
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case i > guard_len+s_ln:
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t.Errorf("Back guard violated at %d %v", i-guard_len-s_ln, vec[guard_len+s_ln:])
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case (i-guard_len)%inc == 0 && (i-guard_len)/inc < len(vec):
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// Ignore input values
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default:
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t.Errorf("Internal guard violated at %d %v", i-guard_len, vec[guard_len:guard_len+s_ln])
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}
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}
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}
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var ( // Offset sets for testing alignment handling in Unitary assembly functions.
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align1 = []int{0, 1}
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align2 = newIncSet(0, 1)
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align3 = newIncToSet(0, 1)
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)
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type incSet struct {
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x, y int
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}
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// genInc will generate all (x,y) combinations of the input increment set.
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func newIncSet(inc ...int) []incSet {
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n := len(inc)
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is := make([]incSet, n*n)
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for x := range inc {
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for y := range inc {
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is[x*n+y] = incSet{inc[x], inc[y]}
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}
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}
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return is
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}
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type incToSet struct {
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dst, x, y int
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}
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// genIncTo will generate all (dst,x,y) combinations of the input increment set.
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func newIncToSet(inc ...int) []incToSet {
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n := len(inc)
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is := make([]incToSet, n*n*n)
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for i, dst := range inc {
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for x := range inc {
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for y := range inc {
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is[i*n*n+x*n+y] = incToSet{dst, inc[x], inc[y]}
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}
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}
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}
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return is
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}
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