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37 lines
747 B
Go
37 lines
747 B
Go
// Copyright ©2015 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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//go:build !amd64 || noasm || gccgo || safe
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// +build !amd64 noasm gccgo safe
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package f64
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// DotUnitary is
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// for i, v := range x {
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// sum += y[i] * v
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// }
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// return sum
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func DotUnitary(x, y []float64) (sum float64) {
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for i, v := range x {
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sum += y[i] * v
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}
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return sum
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}
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// DotInc is
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// for i := 0; i < int(n); i++ {
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// sum += y[iy] * x[ix]
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// ix += incX
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// iy += incY
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// }
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// return sum
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func DotInc(x, y []float64, n, incX, incY, ix, iy uintptr) (sum float64) {
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for i := 0; i < int(n); i++ {
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sum += y[iy] * x[ix]
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ix += incX
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iy += incY
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}
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return sum
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}
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