os_linux_s390x.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  package runtime
     6  
     7  import "internal/cpu"
     8  
     9  const (
    10  	_HWCAP_VX = 1 << 11 // vector facility
    11  )
    12  
    13  func archauxv(tag, val uintptr) {
    14  	switch tag {
    15  	case _AT_HWCAP:
    16  		cpu.HWCap = uint(val)
    17  	}
    18  }
    19  
    20  func osArchInit() {}
    21  
    22  func checkS390xCPU() {
    23  	// Check if the present z-system has the hardware capability to carryout
    24  	// floating point operations. Check if hwcap reflects CPU capability for the
    25  	// necessary floating point hardware (HasVX) availability.
    26  	// Starting with Go1.19, z13 is the minimum machine level for running Go on LoZ
    27  	if cpu.HWCap&_HWCAP_VX == 0 {
    28  		print("runtime: This CPU has no floating point hardware, so this program cannot be run. \n")
    29  		exit(1)
    30  	}
    31  }
    32
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