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99b39a83e7
This patch just adjusts the generic implementation regarding code style. No functional change. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/* s_rintl.c -- long double version of s_rint.c.
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* Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#if defined (LIBM_SCCS) && ! defined (lint)
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static char rcsid[] = "$NetBSD: $";
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#endif
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/*
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* rintl(x)
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* Return x rounded to integral value according to the prevailing
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* rounding mode.
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* Method:
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* Using floating addition.
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* Exception:
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* Inexact flag raised if x not equal to rintl(x).
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*/
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#define NO_MATH_REDIRECT
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#include <math.h>
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#include <math_private.h>
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#include <libm-alias-ldouble.h>
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#include <math-use-builtins.h>
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_Float128
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__rintl (_Float128 x)
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{
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#if USE_RINTL_BUILTIN
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return __builtin_rintl (x);
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#else
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/* Use generic implementation. */
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static const _Float128
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TWO112[2] = {
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5.19229685853482762853049632922009600E+33L, /* 0x406F000000000000, 0 */
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-5.19229685853482762853049632922009600E+33L /* 0xC06F000000000000, 0 */
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};
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int64_t i0, j0, sx;
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uint64_t i1 __attribute__ ((unused));
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_Float128 w, t;
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GET_LDOUBLE_WORDS64 (i0, i1, x);
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sx = (((uint64_t) i0) >> 63);
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j0 = ((i0 >> 48) & 0x7fff) - 0x3fff;
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if (j0 < 112)
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{
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if (j0 < 0)
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{
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w = TWO112[sx] + x;
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t = w - TWO112[sx];
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GET_LDOUBLE_MSW64 (i0, t);
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SET_LDOUBLE_MSW64 (t, (i0 & 0x7fffffffffffffffLL) | (sx << 63));
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return t;
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}
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}
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else
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{
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if (j0 == 0x4000)
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return x + x; /* inf or NaN */
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else
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return x; /* x is integral */
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}
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w = TWO112[sx] + x;
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return w - TWO112[sx];
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#endif /* ! USE_RINTL_BUILTIN */
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}
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libm_alias_ldouble (__rint, rint)
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