// Copyright 2014 The Go 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 runtime var hardDiv bool // TODO: set if a hardware divider is available func checkgoarm() { // TODO(minux): FP checks like in os_linux_arm.go. // osinit not called yet, so ncpu not set: must use getncpu directly. if getncpu() > 1 && goarm < 7 { print("runtime: this system has multiple CPUs and must use\n") print("atomic synchronization instructions. Recompile using GOARM=7.\n") exit(1) } } //go:nosplit func cputicks() int64 { // Currently cputicks() is used in blocking profiler and to seed runtime·fastrand(). // runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler. // TODO: need more entropy to better seed fastrand. return nanotime() }