xref: /OK3568_Linux_fs/u-boot/post/lib_powerpc/fpu/20001122-1.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_math1(void)19*4882a593Smuzhiyun int fpu_post_test_math1 (void)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun 	volatile double a;
22*4882a593Smuzhiyun 	double c, d;
23*4882a593Smuzhiyun 	volatile double b;
24*4882a593Smuzhiyun 
25*4882a593Smuzhiyun 	d = 1.0;
26*4882a593Smuzhiyun 
27*4882a593Smuzhiyun 	do
28*4882a593Smuzhiyun 	{
29*4882a593Smuzhiyun 		c = d;
30*4882a593Smuzhiyun 		d = c * 0.5;
31*4882a593Smuzhiyun 		b = 1 + d;
32*4882a593Smuzhiyun 	} while (b != 1.0);
33*4882a593Smuzhiyun 
34*4882a593Smuzhiyun 	a = 1.0 + c;
35*4882a593Smuzhiyun 
36*4882a593Smuzhiyun 	if (a == 1.0) {
37*4882a593Smuzhiyun 		post_log ("Error in FPU math1 test\n");
38*4882a593Smuzhiyun 		return -1;
39*4882a593Smuzhiyun 	}
40*4882a593Smuzhiyun 
41*4882a593Smuzhiyun 	return 0;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun 
44*4882a593Smuzhiyun #endif /* CONFIG_POST & CONFIG_SYS_POST_FPU */
45