d5eea0f7cc
2018-01-08 Michael Meissner <meissner@linux.vnet.ibm.com> * config/rs6000/quad-float128.h (IBM128_TYPE): Explicitly use __ibm128, instead of trying to use long double. (CVT_FLOAT128_TO_IBM128): Use TFtype instead of __float128 to accomidate -mabi=ieeelongdouble multilibs. (CVT_IBM128_TO_FLOAT128): Likewise. * config/rs6000/ibm-ldouble.c (IBM128_TYPE): New macro to define the appropriate IBM extended double type. (__gcc_qadd): Change all occurances of long double to IBM128_TYPE. (__gcc_qsub): Likewise. (__gcc_qmul): Likewise. (__gcc_qdiv): Likewise. (pack_ldouble): Likewise. (__gcc_qneg): Likewise. (__gcc_qeq): Likewise. (__gcc_qne): Likewise. (__gcc_qge): Likewise. (__gcc_qle): Likewise. (__gcc_stoq): Likewise. (__gcc_dtoq): Likewise. (__gcc_itoq): Likewise. (__gcc_utoq): Likewise. (__gcc_qunord): Likewise. * config/rs6000/_mulkc3.c (toplevel): Include soft-fp.h and quad-float128.h for the definitions. (COPYSIGN): Use the f128 version instead of the q version. (INFINITY): Likewise. (__mulkc3): Use TFmode/TCmode for float128 scalar/complex types. * config/rs6000/_divkc3.c (toplevel): Include soft-fp.h and quad-float128.h for the definitions. (COPYSIGN): Use the f128 version instead of the q version. (INFINITY): Likewise. (FABS): Likewise. (__divkc3): Use TFmode/TCmode for float128 scalar/complex types. * config/rs6000/extendkftf2-sw.c (__extendkftf2_sw): Likewise. * config/rs6000/trunctfkf2-sw.c (__trunctfkf2_sw): Likewise. From-SVN: r256353
94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/* Copyright (C) 1989-2018 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* This is a temporary specialization of code from libgcc/libgcc2.c. */
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#include "soft-fp.h"
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#include "quad-float128.h"
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#define COPYSIGN(x,y) __builtin_copysignf128 (x, y)
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#define INFINITY __builtin_inff128 ()
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#define FABS __builtin_fabsf128
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#define isnan __builtin_isnan
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#define isinf __builtin_isinf
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#define isfinite __builtin_isfinite
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#if defined(FLOAT128_HW_INSNS) && !defined(__divkc3)
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#define __divkc3 __divkc3_sw
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#endif
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TCtype
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__divkc3 (TFtype a, TFtype b, TFtype c, TFtype d)
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{
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TFtype denom, ratio, x, y;
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TCtype res;
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/* ??? We can get better behavior from logarithmic scaling instead of
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the division. But that would mean starting to link libgcc against
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libm. We could implement something akin to ldexp/frexp as gcc builtins
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fairly easily... */
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if (FABS (c) < FABS (d))
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{
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ratio = c / d;
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denom = (c * ratio) + d;
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x = ((a * ratio) + b) / denom;
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y = ((b * ratio) - a) / denom;
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}
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else
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{
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ratio = d / c;
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denom = (d * ratio) + c;
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x = ((b * ratio) + a) / denom;
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y = (b - (a * ratio)) / denom;
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}
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/* Recover infinities and zeros that computed as NaN+iNaN; the only cases
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are nonzero/zero, infinite/finite, and finite/infinite. */
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if (isnan (x) && isnan (y))
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{
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if (c == 0.0 && d == 0.0 && (!isnan (a) || !isnan (b)))
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{
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x = COPYSIGN (INFINITY, c) * a;
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y = COPYSIGN (INFINITY, c) * b;
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}
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else if ((isinf (a) || isinf (b)) && isfinite (c) && isfinite (d))
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{
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a = COPYSIGN (isinf (a) ? 1 : 0, a);
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b = COPYSIGN (isinf (b) ? 1 : 0, b);
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x = INFINITY * (a * c + b * d);
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y = INFINITY * (b * c - a * d);
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}
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else if ((isinf (c) || isinf (d)) && isfinite (a) && isfinite (b))
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{
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c = COPYSIGN (isinf (c) ? 1 : 0, c);
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d = COPYSIGN (isinf (d) ? 1 : 0, d);
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x = 0.0 * (a * c + b * d);
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y = 0.0 * (b * c - a * d);
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}
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}
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__real__ res = x;
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__imag__ res = y;
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return res;
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}
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