mirror of https://github.com/k3s-io/k3s
21 lines
632 B
Go
21 lines
632 B
Go
|
// Copyright ©2015 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.
|
||
|
|
|
||
|
|
// +build !appengine,!safe
|
||
|
|
|
||
|
|
package mat
|
||
|
|
|
||
|
|
import "unsafe"
|
||
|
|
|
||
|
|
// offset returns the number of float64 values b[0] is after a[0].
|
||
|
|
func offset(a, b []float64) int {
|
||
|
|
if &a[0] == &b[0] {
|
||
|
|
return 0
|
||
|
|
}
|
||
|
|
// This expression must be atomic with respect to GC moves.
|
||
|
|
// At this stage this is true, because the GC does not
|
||
|
|
// move. See https://golang.org/issue/12445.
|
||
|
|
return int(uintptr(unsafe.Pointer(&b[0]))-uintptr(unsafe.Pointer(&a[0]))) / int(unsafe.Sizeof(float64(0)))
|
||
|
|
}
|