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f029f4be17
2012-11-01 Tobias Burnus <burnus@net-b.de>
* Makefile.am (libquadmath_la_SOURCES): Add new math/* files.
* Makefile.in: Regenerated.
* math/acoshq.c: Update comment.
* math/acosq.c: Ditto.
* math/asinhq.c: Ditto.
* math/asinq.c: Ditto.
* math/atan2q.c: Ditto.
* math/atanhq.c: Ditto.
* math/ceilq.c: Ditto.
* math/copysignq.c: Ditto.
* math/cosq.c: Ditto.
* math/coshq.c: Ditto.
* math/erfq.c: Ditto.
* math/fabsq.c: Ditto.
* math/finiteq.c: Ditto.
* math/floorq.c: Ditto.
* math/fmodq.c: Ditto.
* math/frexpq.c: Ditto.
* math/isnanq.c: Ditto.
* math/j0q.c: Ditto.
* math/j1q.c: Ditto.
* math/ldexpq.c: Ditto.
* math/llroundq.c: Ditto.
* math/log10q.c: Ditto.
* math/log1pq.c: Ditto.
* math/log2q.c: Ditto.
* math/logq.c: Ditto.
* math/lroundq.c: Ditto.
* math/modfq.c: Ditto.
* math/nextafterq.c: Ditto.
* math/powq.c: Ditto.
* math/rem_pio2q.c: Ditto.
* math/remainderq.c: Ditto.
* math/rintq.c: Ditto.
* math/roundq.c: Ditto.
* math/scalblnq.c: Ditto.
* math/scalbnq.c: Ditto.
* math/sincosq_kernel.c: Ditto.
* math/sinq.c: Ditto.
* math/tanq.c: Ditto.
* math/expq.c: Ditto.
(__expq_table, expq): Renamed local array from __expl_table.
* math/cosq_kernel.c (__quadmath_kernel_cosq): Fix sign
* handling.
* math/cacoshq.c: Changes from GLIBC; fix returned sign.
* math/casinhq.c: Changes from GLIBC to fix special-case.
* math/cbrtq.c: Use modified GLIBC version.
* math/complex.c (ccoshd, cexpq, clog10q, clogq, csinhq, csinq,
ctanhq, ctanq): Moved to separates files.
(mult_c128, div_c128): Removed no longer needed functions.
(cexpiq): Call sincosq instead of sinq and cosq.
(cosq): Call cosh(-re,im) instead of cosq/sinq/sinh/cosh.
* math/ccoshq.c (ccoshq): New file, moved from complex.c and
modified based on GLIBC.
* math/cexpq.c (cexp): Ditto.
* math/clog10q.c (clog10q): Ditto.
* math/clogq.c (clogq): Ditto.
* math/csinhq.c: Ditto.
* math/csinq.c: Ditto.
* math/csqrtq.c: Ditto.
* math/ctanhq.c: Ditto.
* math/ctanq.c: Ditto.
* math/fmaq.c (fmaq): Port TININESS_AFTER_ROUNDING handling
from GLIBC.
* math/ilogbq.c (ilogbq): Add errno = EDOM handling.
* math/isinf_nsq.c (__quadmath_isinf_nsq): New file, ported
from GLIBC.
* math/lgammaq.c (lgammaq): Add signgam handling.
* math/sinhq.c (sinhq): Fix sign handling.
* math/sinq_kernel.c (__quadmath_kernel_sinq): Ditto.
* math/tgammaq.c (tgammaq): Ditto.
* math/x2y2m1q.c: New file.
* quadmath-imp.h (TININESS_AFTER_ROUNDING): New define.
(__quadmath_x2y2m1q, __quadmath_isinf_nsq): New prototypes.
From-SVN: r193063
58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/* scalblnq.c -- __float128 version of s_scalbn.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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/*
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* scalblnq (_float128 x, long int n)
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* scalblnq(x,n) returns x* 2**n computed by exponent
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* manipulation rather than by actually performing an
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* exponentiation or a multiplication.
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*/
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#include "quadmath-imp.h"
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static const __float128
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two114 = 2.0769187434139310514121985316880384E+34Q, /* 0x4071000000000000, 0 */
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twom114 = 4.8148248609680896326399448564623183E-35Q, /* 0x3F8D000000000000, 0 */
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huge = 1.0E+4900Q,
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tiny = 1.0E-4900Q;
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__float128
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scalblnq (__float128 x, long int n)
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{
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int64_t k,hx,lx;
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GET_FLT128_WORDS64(hx,lx,x);
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k = (hx>>48)&0x7fff; /* extract exponent */
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if (k==0) { /* 0 or subnormal x */
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if ((lx|(hx&0x7fffffffffffffffULL))==0) return x; /* +-0 */
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x *= two114;
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GET_FLT128_MSW64(hx,x);
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k = ((hx>>48)&0x7fff) - 114;
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}
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if (k==0x7fff) return x+x; /* NaN or Inf */
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if (n< -50000) return tiny*copysignq(tiny,x); /*underflow*/
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if (n> 50000 || k+n > 0x7ffe)
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return huge*copysignq(huge,x); /* overflow */
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/* Now k and n are bounded we know that k = k+n does not
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overflow. */
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k = k+n;
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if (k > 0) /* normal result */
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{SET_FLT128_MSW64(x,(hx&0x8000ffffffffffffULL)|(k<<48)); return x;}
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if (k <= -114)
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return tiny*copysignq(tiny,x); /*underflow*/
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k += 114; /* subnormal result */
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SET_FLT128_MSW64(x,(hx&0x8000ffffffffffffULL)|(k<<48));
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return x*twom114;
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}
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