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libm: fix truncl when long double has same size as double #18480

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libm: fix truncl when long double has same size as double #18480

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14 changes: 13 additions & 1 deletion libs/libm/libm/lib_truncl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -44,9 +44,20 @@
****************************************************************************/

#ifdef CONFIG_HAVE_LONG_DOUBLE
#if LDBL_MANT_DIG == DBL_MANT_DIG

/* Cover case when double is the same as long double (64 bit ieee754). */

long double truncl(long double x)
{
return trunc(x);
}

#else

static const long double toint = 1 / LDBL_EPSILON;

/* FIXME This will only work if long double is 64 bit and little endian */
/* FIXME This will only work if long double is 80 bit and little endian */

union ldshape
{
Expand Down Expand Up @@ -101,3 +112,4 @@ long double truncl(long double x)
return s ? -x : x;
}
#endif
#endif
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