upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/post/lib_powerpc/fpu/20001122-1.c

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/*
* Copyright (C) 2007
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* This file is originally a part of the GCC testsuite.
*/
#include <common.h>
#include <post.h>
GNU_FPOST_ATTR
#if CONFIG_POST & CONFIG_SYS_POST_FPU
int fpu_post_test_math1 (void)
{
volatile double a;
double c, d;
volatile double b;
d = 1.0;
do
{
c = d;
d = c * 0.5;
b = 1 + d;
} while (b != 1.0);
a = 1.0 + c;
if (a == 1.0) {
post_log ("Error in FPU math1 test\n");
return -1;
}
return 0;
}
#endif /* CONFIG_POST & CONFIG_SYS_POST_FPU */