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69da3c9e87
quad.h have
#if _FP_W_TYPE_SIZE < 64
union _FP_UNION_Q
{
Use 4 _FP_W_TYPEs
}
#else
union _FP_UNION_Q
{
Use 2 _FP_W_TYPEs
}
#endif
Replace
#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
with
#if _FP_W_TYPE_SIZE < 64
to check whether 4 or 2 _FP_W_TYPEs are used for IEEE quad precision.
Tested with build-many-glibcs.py.
[BZ #24066]
* soft-fp/extenddftf2.c: Use "_FP_W_TYPE_SIZE < 64" to check if
4_FP_W_TYPEs are used for IEEE quad precision.
* soft-fp/extendhftf2.c: Likewise.
* soft-fp/extendsftf2.c: Likewise.
* soft-fp/extendxftf2.c: Likewise.
* soft-fp/trunctfdf2.c: Likewise.
* soft-fp/trunctfhf2.c: Likewise.
* soft-fp/trunctfsf2.c: Likewise.
* soft-fp/trunctfxf2.c: Likewise.
* sysdeps/alpha/ots_cvttx.c: Likewise.
* sysdeps/alpha/ots_cvtxt.c: Likewise.
* sysdeps/ieee754/soft-fp/s_daddl.c: Likewise.
* sysdeps/ieee754/soft-fp/s_ddivl.c: Likewise.
* sysdeps/ieee754/soft-fp/s_dmull.c: Likewise.
* sysdeps/ieee754/soft-fp/s_dsubl.c: Likewise.
* sysdeps/ieee754/soft-fp/s_faddl.c: Likewise.
* sysdeps/ieee754/soft-fp/s_fdivl.c: Likewise.
* sysdeps/ieee754/soft-fp/s_fmull.c: Likewise.
* sysdeps/ieee754/soft-fp/s_fsubl.c: Likewise.
* sysdeps/sparc/sparc32/q_dtoq.c: Likewise.
* sysdeps/sparc/sparc32/q_qtod.c: Likewise.
* sysdeps/sparc/sparc32/q_qtos.c: Likewise.
* sysdeps/sparc/sparc32/q_stoq.c: Likewise.
* sysdeps/sparc/sparc64/qp_dtoq.c: Likewise.
* sysdeps/sparc/sparc64/qp_qtod.c: Likewise.
* sysdeps/sparc/sparc64/qp_qtos.c: Likewise.
* sysdeps/sparc/sparc64/qp_stoq.c: Likewise.
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/* Subtract long double (ldbl-128) values, narrowing the result to
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double, using soft-fp.
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Copyright (C) 2018-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#define f32xsubf64x __hide_f32xsubf64x
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#define f32xsubf128 __hide_f32xsubf128
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#define f64subf64x __hide_f64subf64x
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#define f64subf128 __hide_f64subf128
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#include <math.h>
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#undef f32xsubf64x
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#undef f32xsubf128
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#undef f64subf64x
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#undef f64subf128
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#include <math-narrow.h>
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#include <soft-fp.h>
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#include <double.h>
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#include <quad.h>
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double
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__dsubl (_Float128 x, _Float128 y)
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{
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FP_DECL_EX;
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FP_DECL_Q (X);
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FP_DECL_Q (Y);
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FP_DECL_Q (R);
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FP_DECL_D (RN);
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double ret;
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FP_INIT_ROUNDMODE;
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FP_UNPACK_SEMIRAW_Q (X, x);
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FP_UNPACK_SEMIRAW_Q (Y, y);
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FP_SUB_Q (R, X, Y);
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#if _FP_W_TYPE_SIZE < 64
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FP_TRUNC (D, Q, 2, 4, RN, R);
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#else
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FP_TRUNC (D, Q, 1, 2, RN, R);
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#endif
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FP_PACK_SEMIRAW_D (ret, RN);
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FP_HANDLE_EXCEPTIONS;
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CHECK_NARROW_SUB (ret, x, y);
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return ret;
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}
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libm_alias_double_ldouble (sub)
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