// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build gc

package main

// useVFPv1 tries to execute one VFPv1 instruction on ARM.
// It will crash the current process if VFPv1 is missing.
func useVFPv1()

// useVFPv3 tries to execute one VFPv3 instruction on ARM.
// It will crash the current process if VFPv3 is missing.
func useVFPv3()

// Copyright 2015 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.

//go:build gccgo

package main

func useVFPv1() {}

func useVFPv3() {}

// Copyright 2015 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.

//go:build gc && !arm

#include "textflag.h"

TEXT ·useVFPv1(SB),NOSPLIT,$0
	RET

TEXT ·useVFPv3(SB),NOSPLIT,$0
	RET

TEXT ·useARMv6K(SB),NOSPLIT,$0

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build gc

#include "textflag.h"

// try to run "vmov.f64 d0, d0" instruction
TEXT ·useVFPv1(SB),NOSPLIT,$0
	WORD $0xeeb00b40	// vmov.f64 d0, d0
	RET

// try to run VFPv3-only "vmov.f64 d0, #112" instruction
TEXT ·useVFPv3(SB),NOSPLIT,$0
	WORD $0xeeb70b00	// vmov.f64 d0, #112
	RET

	// the bootstrap version is now 1.17+ and thus this is fine.
	if runtime.GOMAXPROCS(0) == 1 {
		maxbg = 1
	}
	bginit()

	if len(os.Args) > 1 && os.Args[1] == "-check-goarm" {
		useVFPv1() // might fail with SIGILL
		println("VFPv1 OK.")
		useVFPv3() // might fail with SIGILL
		println("VFPv3 OK.")
		os.Exit(0)
	}

	xinit()
	xmain()
	xexit(0)
}