/*

	getcpuflags_x86_64: get cpuflags for x86-64

	copyright 1995-2013 by the mpg123 project - free software under the terms of the LGPL 2.1

	see COPYING and AUTHORS files in distribution or http://mpg123.org

	initially written by Taihei Monma

*/

#include "mangle.h"

	.text

	ALIGN4

	.globl ASM_NAME(getcpuflags)

ASM_NAME(getcpuflags):

	push	%rbp

	mov		%rsp, %rbp

	push	%rbx

#ifdef IS_MSABI

	push	%rdi

	mov		%rcx, %rdi

#endif

	movl	$0, 12(%rdi)

	movl	$0, 16(%rdi)

	mov		$0x80000000, %eax

	cpuid

	cmp		$0x80000001, %eax

	jb		1f

	mov		$0x80000001, %eax

	cpuid

	movl	%edx, 12(%rdi)

1:

	mov		$0x00000001, %eax

	cpuid

	movl	%eax, (%rdi)

	movl	%ecx, 4(%rdi)

	movl	%edx, 8(%rdi)

	test	$0x04000000, %ecx

	jz		2f

	test	$0x08000000, %ecx

	jz		2f

	xor		%ecx, %ecx

	.byte	0x0f, 0x01, 0xd0 /* xgetbv instruction */

	movl	%eax, 16(%rdi)

	movl	(%rdi), %eax

2:

#ifdef IS_MSABI

	pop		%rdi

#endif

	pop		%rbx

	mov		%rbp, %rsp

	pop		%rbp

	ret

NONEXEC_STACK