/*
   * Testsuite for atomic64_t functions
   *
   * Copyright © 2010  Luca Barbieri
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   */

  
  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

  #include <linux/init.h>

  #include <linux/bug.h>

  #include <linux/kernel.h>

  #include <linux/atomic.h>

  
  #define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
  static __init int test_atomic64(void)
  {
  	long long v0 = 0xaaa31337c001d00dLL;
  	long long v1 = 0xdeadbeefdeafcafeLL;
  	long long v2 = 0xfaceabadf00df001LL;
  	long long onestwos = 0x1111111122222222LL;
  	long long one = 1LL;
  
  	atomic64_t v = ATOMIC64_INIT(v0);
  	long long r = v0;
  	BUG_ON(v.counter != r);
  
  	atomic64_set(&v, v1);
  	r = v1;
  	BUG_ON(v.counter != r);
  	BUG_ON(atomic64_read(&v) != r);
  
  	INIT(v0);
  	atomic64_add(onestwos, &v);
  	r += onestwos;
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	atomic64_add(-one, &v);
  	r += -one;
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	r += onestwos;
  	BUG_ON(atomic64_add_return(onestwos, &v) != r);
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	r += -one;
  	BUG_ON(atomic64_add_return(-one, &v) != r);
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	atomic64_sub(onestwos, &v);
  	r -= onestwos;
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	atomic64_sub(-one, &v);
  	r -= -one;
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	r -= onestwos;
  	BUG_ON(atomic64_sub_return(onestwos, &v) != r);
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	r -= -one;
  	BUG_ON(atomic64_sub_return(-one, &v) != r);
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	atomic64_inc(&v);
  	r += one;
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	r += one;
  	BUG_ON(atomic64_inc_return(&v) != r);
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	atomic64_dec(&v);
  	r -= one;
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	r -= one;
  	BUG_ON(atomic64_dec_return(&v) != r);
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	BUG_ON(atomic64_xchg(&v, v1) != v0);
  	r = v1;
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
  	r = v1;
  	BUG_ON(v.counter != r);
  
  	INIT(v0);
  	BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
  	BUG_ON(v.counter != r);
  
  	INIT(v0);

  	BUG_ON(atomic64_add_unless(&v, one, v0));

  	BUG_ON(v.counter != r);
  
  	INIT(v0);

  	BUG_ON(!atomic64_add_unless(&v, one, v1));

  	r += one;
  	BUG_ON(v.counter != r);

  #ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE

  	INIT(onestwos);
  	BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
  	r -= one;
  	BUG_ON(v.counter != r);
  
  	INIT(0);
  	BUG_ON(atomic64_dec_if_positive(&v) != -one);
  	BUG_ON(v.counter != r);
  
  	INIT(-one);
  	BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
  	BUG_ON(v.counter != r);

  #else

  #warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol

  #endif

  
  	INIT(onestwos);

  	BUG_ON(!atomic64_inc_not_zero(&v));

  	r += one;
  	BUG_ON(v.counter != r);
  
  	INIT(0);

  	BUG_ON(atomic64_inc_not_zero(&v));

  	BUG_ON(v.counter != r);
  
  	INIT(-one);

  	BUG_ON(!atomic64_inc_not_zero(&v));

  	r += one;
  	BUG_ON(v.counter != r);
  
  #ifdef CONFIG_X86

  	pr_info("passed for %s platform %s CX8 and %s SSE
  ",

  #ifdef CONFIG_X86_64

  		"x86-64",

  #elif defined(CONFIG_X86_CMPXCHG64)

  		"i586+",

  #else

  		"i386+",

  #endif

  	       boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
  	       boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");

  #else

  	pr_info("passed
  ");

  #endif
  
  	return 0;
  }
  
  core_initcall(test_atomic64);