libgo/go/runtime/os_linux_ppc64x.go

   1 // Copyright 2016 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 // +build ignore_for_gccgo
   6 // +build ppc64 ppc64le
   7
   8 package runtime
   9
  10 // For go:linkname
  11 import _ "unsafe"
  12
  13 // ppc64x doesn't have a 'cpuid' instruction equivalent and relies on
  14 // HWCAP/HWCAP2 bits for hardware capabilities.
  15
  16 //go:linkname cpu_hwcap internal/cpu.ppc64x_hwcap
  17 //go:linkname cpu_hwcap2 internal/cpu.ppc64x_hwcap2
  18 var cpu_hwcap uint
  19 var cpu_hwcap2 uint
  20
  21 func archauxv(tag, val uintptr) {
  22         switch tag {
  23         case _AT_HWCAP:
  24                 cpu_hwcap = uint(val)
  25         case _AT_HWCAP2:
  26                 cpu_hwcap2 = uint(val)
  27         }
  28 }