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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.
* Check that certain subnormal numbers (formerly known as denormalized
* numbers) are rounded to within 0.5 ulp. PR other/14354.
*/
#include <common.h>
#include <post.h>
GNU_FPOST_ATTR
#if CONFIG_POST & CONFIG_SYS_POST_FPU
union uf
{
unsigned int u;
float f;
};
static float
u2f (unsigned int v)
{
union uf u;
u.u = v;
return u.f;
}
static unsigned int
f2u (float v)
{
union uf u;
u.f = v;
return u.u;
}
static int ok = 1;
static void
tstmul (unsigned int ux, unsigned int uy, unsigned int ur)
{
float x = u2f (ux);
float y = u2f (uy);
if (f2u (x * y) != ur)
/* Set a variable rather than aborting here, to simplify tracing when
several computations are wrong. */
ok = 0;
}
/* We don't want to make this const and static, or else we risk inlining
causing the test to fold as constants at compile-time. */
struct
{
unsigned int p1, p2, res;
} static volatile expected[] =
{
{0xfff, 0x3f800400, 0xfff},
{0xf, 0x3fc88888, 0x17},
{0xf, 0x3f844444, 0xf}
};
int fpu_post_test_math7 (void)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(expected); i++)
{
tstmul (expected[i].p1, expected[i].p2, expected[i].res);
tstmul (expected[i].p2, expected[i].p1, expected[i].res);
}
if (!ok) {
post_log ("Error in FPU math7 test\n");
return -1;
}
return 0;
}
#endif /* CONFIG_POST & CONFIG_SYS_POST_FPU */
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