xref: /OK3568_Linux_fs/u-boot/post/lib_powerpc/fpu/980619-1.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun  * Copyright (C) 2007
3*4882a593Smuzhiyun  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4*4882a593Smuzhiyun  *
5*4882a593Smuzhiyun  * SPDX-License-Identifier:	GPL-2.0+
6*4882a593Smuzhiyun  */
7*4882a593Smuzhiyun /*
8*4882a593Smuzhiyun  * This file is originally a part of the GCC testsuite.
9*4882a593Smuzhiyun  */
10*4882a593Smuzhiyun 
11*4882a593Smuzhiyun #include <common.h>
12*4882a593Smuzhiyun 
13*4882a593Smuzhiyun #include <post.h>
14*4882a593Smuzhiyun 
15*4882a593Smuzhiyun GNU_FPOST_ATTR
16*4882a593Smuzhiyun 
17*4882a593Smuzhiyun #if CONFIG_POST & CONFIG_SYS_POST_FPU
18*4882a593Smuzhiyun 
fpu_post_test_math4(void)19*4882a593Smuzhiyun int fpu_post_test_math4 (void)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun 	volatile float reale = 1.0f;
22*4882a593Smuzhiyun 	volatile float oneplus;
23*4882a593Smuzhiyun 	int i;
24*4882a593Smuzhiyun 
25*4882a593Smuzhiyun 	if (sizeof (float) != 4)
26*4882a593Smuzhiyun 		return 0;
27*4882a593Smuzhiyun 
28*4882a593Smuzhiyun 	for (i = 0; ; i++)
29*4882a593Smuzhiyun 	{
30*4882a593Smuzhiyun 		oneplus = 1.0f + reale;
31*4882a593Smuzhiyun 		if (oneplus == 1.0f)
32*4882a593Smuzhiyun 			break;
33*4882a593Smuzhiyun 		reale = reale / 2.0f;
34*4882a593Smuzhiyun 	}
35*4882a593Smuzhiyun 	/* Assumes ieee754 accurate arithmetic above.  */
36*4882a593Smuzhiyun 	if (i != 24) {
37*4882a593Smuzhiyun 		post_log ("Error in FPU math4 test\n");
38*4882a593Smuzhiyun 		return -1;
39*4882a593Smuzhiyun 	}
40*4882a593Smuzhiyun 	return 0;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun 
43*4882a593Smuzhiyun #endif /* CONFIG_POST & CONFIG_SYS_POST_FPU */
44