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/980619-1.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2007
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
/*
* 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_math4 (void)
{
volatile float reale = 1.0f;
volatile float oneplus;
int i;
if (sizeof (float) != 4)
return 0;
for (i = 0; ; i++)
{
oneplus = 1.0f + reale;
if (oneplus == 1.0f)
break;
reale = reale / 2.0f;
}
/* Assumes ieee754 accurate arithmetic above. */
if (i != 24) {
post_log ("Error in FPU math4 test\n");
return -1;
}
return 0;
}
#endif /* CONFIG_POST & CONFIG_SYS_POST_FPU */