198 lines
4.7 KiB
Fortran
198 lines
4.7 KiB
Fortran
! Copyright (C) 2002-2017 Free Software Foundation, Inc.
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! Contributed by Tobias Schl"uter
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!
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!This file is part of the GNU Fortran 95 runtime library (libgfortran).
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!
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!GNU libgfortran is free software; you can redistribute it and/or
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!modify it under the terms of the GNU General Public
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!License as published by the Free Software Foundation; either
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!version 3 of the License, or (at your option) any later version.
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!
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!GNU libgfortran 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
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!GNU General Public License for more details.
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!
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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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!
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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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! Specifics for the intrinsics whose calling conventions change if
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! -ff2c is used.
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!
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! There are two annoyances WRT the preprocessor:
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! - we're using -traditional-cpp, so we can't use the ## operator.
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! - macros expand to a single line, and Fortran lines can't be wider
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! than 132 characters, therefore we use two macros to split the lines
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!
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! The cases we need to implement are functions returning default REAL
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! or COMPLEX. The former need to return DOUBLE PRECISION instead of REAL,
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! the latter become subroutines returning via a hidden first argument.
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! one argument functions
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#define REAL_HEAD(NAME) \
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elemental function _gfortran_f2c_specific__/**/NAME/**/_r4 (parm) result(res);
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#define REAL_BODY(NAME) \
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REAL, intent (in) :: parm; \
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DOUBLE PRECISION :: res; \
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res = NAME (parm); \
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end function
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#define COMPLEX_HEAD(NAME) \
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subroutine _gfortran_f2c_specific__/**/NAME/**/_c4 (res, parm);
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#define COMPLEX_BODY(NAME) \
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COMPLEX, intent (in) :: parm; \
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COMPLEX, intent (out) :: res; \
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res = NAME (parm); \
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end subroutine
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#define DCOMPLEX_HEAD(NAME) \
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subroutine _gfortran_f2c_specific__/**/NAME/**/_c8 (res, parm);
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#define DCOMPLEX_BODY(NAME) \
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DOUBLE COMPLEX, intent (in) :: parm; \
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DOUBLE COMPLEX, intent (out) :: res; \
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res = NAME (parm); \
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end subroutine
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REAL_HEAD(abs)
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REAL_BODY(abs)
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! abs is special in that the result is real
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elemental function _gfortran_f2c_specific__abs_c4 (parm) result (res)
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COMPLEX, intent(in) :: parm
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DOUBLE PRECISION :: res
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res = abs(parm)
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end function
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! aimag is special in that the result is real
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elemental function _gfortran_f2c_specific__aimag_c4 (parm)
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complex(kind=4), intent(in) :: parm
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double precision :: _gfortran_f2c_specific__aimag_c4
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_gfortran_f2c_specific__aimag_c4 = aimag(parm)
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end function
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elemental function _gfortran_f2c_specific__aimag_c8 (parm)
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complex(kind=8), intent(in) :: parm
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double precision :: _gfortran_f2c_specific__aimag_c8
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_gfortran_f2c_specific__aimag_c8 = aimag(parm)
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end function
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REAL_HEAD(exp)
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REAL_BODY(exp)
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COMPLEX_HEAD(exp)
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COMPLEX_BODY(exp)
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DCOMPLEX_HEAD(exp)
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DCOMPLEX_BODY(exp)
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REAL_HEAD(log)
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REAL_BODY(log)
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COMPLEX_HEAD(log)
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COMPLEX_BODY(log)
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DCOMPLEX_HEAD(log)
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DCOMPLEX_BODY(log)
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REAL_HEAD(log10)
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REAL_BODY(log10)
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REAL_HEAD(sqrt)
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REAL_BODY(sqrt)
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COMPLEX_HEAD(sqrt)
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COMPLEX_BODY(sqrt)
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DCOMPLEX_HEAD(sqrt)
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DCOMPLEX_BODY(sqrt)
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REAL_HEAD(asin)
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REAL_BODY(asin)
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REAL_HEAD(acos)
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REAL_BODY(acos)
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REAL_HEAD(atan)
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REAL_BODY(atan)
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REAL_HEAD(asinh)
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REAL_BODY(asinh)
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REAL_HEAD(acosh)
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REAL_BODY(acosh)
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REAL_HEAD(atanh)
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REAL_BODY(atanh)
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REAL_HEAD(sin)
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REAL_BODY(sin)
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COMPLEX_HEAD(sin)
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COMPLEX_BODY(sin)
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DCOMPLEX_HEAD(sin)
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DCOMPLEX_BODY(sin)
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REAL_HEAD(cos)
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REAL_BODY(cos)
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COMPLEX_HEAD(cos)
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COMPLEX_BODY(cos)
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DCOMPLEX_HEAD(cos)
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DCOMPLEX_BODY(cos)
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REAL_HEAD(tan)
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REAL_BODY(tan)
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REAL_HEAD(sinh)
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REAL_BODY(sinh)
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REAL_HEAD(cosh)
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REAL_BODY(cosh)
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REAL_HEAD(tanh)
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REAL_BODY(tanh)
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REAL_HEAD(aint)
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REAL_BODY(aint)
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REAL_HEAD(anint)
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REAL_BODY(anint)
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! two argument functions
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#define REAL2_HEAD(NAME) \
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elemental function _gfortran_f2c_specific__/**/NAME/**/_r4 (p1, p2) result(res);
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#define REAL2_BODY(NAME) \
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REAL, intent (in) :: p1, p2; \
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DOUBLE PRECISION :: res; \
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res = NAME (p1, p2); \
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end function
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REAL2_HEAD(sign)
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REAL2_BODY(sign)
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REAL2_HEAD(dim)
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REAL2_BODY(dim)
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REAL2_HEAD(atan2)
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REAL2_BODY(atan2)
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REAL2_HEAD(mod)
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REAL2_BODY(mod)
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! conjg is special-cased because it is not suffixed _c4 but _4
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subroutine _gfortran_f2c_specific__conjg_4 (res, parm)
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COMPLEX, intent (in) :: parm
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COMPLEX, intent (out) :: res
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res = conjg (parm)
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end subroutine
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subroutine _gfortran_f2c_specific__conjg_8 (res, parm)
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DOUBLE COMPLEX, intent (in) :: parm
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DOUBLE COMPLEX, intent (out) :: res
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res = conjg (parm)
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end subroutine
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