| // Copyright 2016 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 | |
| import "internal/cpu" | |
| const ( | |
| _HWCAP_VX = 1 << 11 // vector facility | |
| ) | |
| func archauxv(tag, val uintptr) { | |
| switch tag { | |
| case _AT_HWCAP: | |
| cpu.HWCap = uint(val) | |
| } | |
| } | |
| func osArchInit() {} | |
| func checkS390xCPU() { | |
| // Check if the present z-system has the hardware capability to carryout | |
| // floating point operations. Check if hwcap reflects CPU capability for the | |
| // necessary floating point hardware (HasVX) availability. | |
| // Starting with Go1.19, z13 is the minimum machine level for running Go on LoZ | |
| if cpu.HWCap&_HWCAP_VX == 0 { | |
| print("runtime: This CPU has no floating point hardware, so this program cannot be run. \n") | |
| exit(1) | |
| } | |
| } |