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annotate src/fftw-3.3.8/api/f77api.c @ 82:d0c2a83c1364

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Add FFTW 3.3.8 source, and a Linux build
author Chris Cannam
date Tue, 19 Nov 2019 14:52:55 +0000
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Chris@82 1 /*
Chris@82 2 * Copyright (c) 2003, 2007-14 Matteo Frigo
Chris@82 3 * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
Chris@82 4 *
Chris@82 5 * This program is free software; you can redistribute it and/or modify
Chris@82 6 * it under the terms of the GNU General Public License as published by
Chris@82 7 * the Free Software Foundation; either version 2 of the License, or
Chris@82 8 * (at your option) any later version.
Chris@82 9 *
Chris@82 10 * This program is distributed in the hope that it will be useful,
Chris@82 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@82 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Chris@82 13 * GNU General Public License for more details.
Chris@82 14 *
Chris@82 15 * You should have received a copy of the GNU General Public License
Chris@82 16 * along with this program; if not, write to the Free Software
Chris@82 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Chris@82 18 *
Chris@82 19 */
Chris@82 20
Chris@82 21 #include "api/api.h"
Chris@82 22 #include "dft/dft.h"
Chris@82 23 #include "rdft/rdft.h"
Chris@82 24
Chris@82 25 #include "api/x77.h"
Chris@82 26
Chris@82 27 /* if F77_FUNC is not defined, then we don't know how to mangle identifiers
Chris@82 28 for the Fortran linker, and we must omit the f77 API. */
Chris@82 29 #if defined(F77_FUNC) || defined(WINDOWS_F77_MANGLING)
Chris@82 30
Chris@82 31 /*-----------------------------------------------------------------------*/
Chris@82 32 /* some internal functions used by the f77 api */
Chris@82 33
Chris@82 34 /* in fortran, the natural array ordering is column-major, which
Chris@82 35 corresponds to reversing the dimensions relative to C's row-major */
Chris@82 36 static int *reverse_n(int rnk, const int *n)
Chris@82 37 {
Chris@82 38 int *nrev;
Chris@82 39 int i;
Chris@82 40 A(FINITE_RNK(rnk));
Chris@82 41 nrev = (int *) MALLOC(sizeof(int) * (unsigned)rnk, PROBLEMS);
Chris@82 42 for (i = 0; i < rnk; ++i)
Chris@82 43 nrev[rnk - i - 1] = n[i];
Chris@82 44 return nrev;
Chris@82 45 }
Chris@82 46
Chris@82 47 /* f77 doesn't have data structures, so we have to pass iodims as
Chris@82 48 parallel arrays */
Chris@82 49 static X(iodim) *make_dims(int rnk, const int *n,
Chris@82 50 const int *is, const int *os)
Chris@82 51 {
Chris@82 52 X(iodim) *dims;
Chris@82 53 int i;
Chris@82 54 A(FINITE_RNK(rnk));
Chris@82 55 dims = (X(iodim) *) MALLOC(sizeof(X(iodim)) * (unsigned)rnk, PROBLEMS);
Chris@82 56 for (i = 0; i < rnk; ++i) {
Chris@82 57 dims[i].n = n[i];
Chris@82 58 dims[i].is = is[i];
Chris@82 59 dims[i].os = os[i];
Chris@82 60 }
Chris@82 61 return dims;
Chris@82 62 }
Chris@82 63
Chris@82 64 typedef struct {
Chris@82 65 void (*f77_write_char)(char *, void *);
Chris@82 66 void *data;
Chris@82 67 } write_char_data;
Chris@82 68
Chris@82 69 static void write_char(char c, void *d)
Chris@82 70 {
Chris@82 71 write_char_data *ad = (write_char_data *) d;
Chris@82 72 ad->f77_write_char(&c, ad->data);
Chris@82 73 }
Chris@82 74
Chris@82 75 typedef struct {
Chris@82 76 void (*f77_read_char)(int *, void *);
Chris@82 77 void *data;
Chris@82 78 } read_char_data;
Chris@82 79
Chris@82 80 static int read_char(void *d)
Chris@82 81 {
Chris@82 82 read_char_data *ed = (read_char_data *) d;
Chris@82 83 int c;
Chris@82 84 ed->f77_read_char(&c, ed->data);
Chris@82 85 return (c < 0 ? EOF : c);
Chris@82 86 }
Chris@82 87
Chris@82 88 static X(r2r_kind) *ints2kinds(int rnk, const int *ik)
Chris@82 89 {
Chris@82 90 if (!FINITE_RNK(rnk) || rnk == 0)
Chris@82 91 return 0;
Chris@82 92 else {
Chris@82 93 int i;
Chris@82 94 X(r2r_kind) *k;
Chris@82 95
Chris@82 96 k = (X(r2r_kind) *) MALLOC(sizeof(X(r2r_kind)) * (unsigned)rnk, PROBLEMS);
Chris@82 97 /* reverse order for Fortran -> C */
Chris@82 98 for (i = 0; i < rnk; ++i)
Chris@82 99 k[i] = (X(r2r_kind)) ik[rnk - 1 - i];
Chris@82 100 return k;
Chris@82 101 }
Chris@82 102 }
Chris@82 103
Chris@82 104 /*-----------------------------------------------------------------------*/
Chris@82 105
Chris@82 106 #define F77(a, A) F77x(x77(a), X77(A))
Chris@82 107
Chris@82 108 #ifndef WINDOWS_F77_MANGLING
Chris@82 109
Chris@82 110 #if defined(F77_FUNC)
Chris@82 111 # define F77x(a, A) F77_FUNC(a, A)
Chris@82 112 # include "f77funcs.h"
Chris@82 113 #endif
Chris@82 114
Chris@82 115 /* If identifiers with underscores are mangled differently than those
Chris@82 116 without underscores, then we include *both* mangling versions. The
Chris@82 117 reason is that the only Fortran compiler that does such differing
Chris@82 118 mangling is currently g77 (which adds an extra underscore to names
Chris@82 119 with underscores), whereas other compilers running on the same
Chris@82 120 machine are likely to use non-underscored mangling. (I'm sick
Chris@82 121 of users complaining that FFTW works with g77 but not with e.g.
Chris@82 122 pgf77 or ifc on the same machine.) Note that all FFTW identifiers
Chris@82 123 contain underscores, and configure picks g77 by default. */
Chris@82 124 #if defined(F77_FUNC_) && !defined(F77_FUNC_EQUIV)
Chris@82 125 # undef F77x
Chris@82 126 # define F77x(a, A) F77_FUNC_(a, A)
Chris@82 127 # include "f77funcs.h"
Chris@82 128 #endif
Chris@82 129
Chris@82 130 #else /* WINDOWS_F77_MANGLING */
Chris@82 131
Chris@82 132 /* Various mangling conventions common (?) under Windows. */
Chris@82 133
Chris@82 134 /* g77 */
Chris@82 135 # define WINDOWS_F77_FUNC(a, A) a ## __
Chris@82 136 # define F77x(a, A) WINDOWS_F77_FUNC(a, A)
Chris@82 137 # include "f77funcs.h"
Chris@82 138
Chris@82 139 /* Intel, etc. */
Chris@82 140 # undef WINDOWS_F77_FUNC
Chris@82 141 # define WINDOWS_F77_FUNC(a, A) a ## _
Chris@82 142 # include "f77funcs.h"
Chris@82 143
Chris@82 144 /* Digital/Compaq/HP Visual Fortran, Intel Fortran. stdcall attribute
Chris@82 145 is apparently required to adjust for calling conventions (callee
Chris@82 146 pops stack in stdcall). See also:
Chris@82 147 http://msdn.microsoft.com/library/en-us/vccore98/html/_core_mixed.2d.language_programming.3a_.overview.asp
Chris@82 148 */
Chris@82 149 # undef WINDOWS_F77_FUNC
Chris@82 150 # if defined(__GNUC__)
Chris@82 151 # define WINDOWS_F77_FUNC(a, A) __attribute__((stdcall)) A
Chris@82 152 # elif defined(_MSC_VER) || defined(_ICC) || defined(_STDCALL_SUPPORTED)
Chris@82 153 # define WINDOWS_F77_FUNC(a, A) __stdcall A
Chris@82 154 # else
Chris@82 155 # define WINDOWS_F77_FUNC(a, A) A /* oh well */
Chris@82 156 # endif
Chris@82 157 # include "f77funcs.h"
Chris@82 158
Chris@82 159 #endif /* WINDOWS_F77_MANGLING */
Chris@82 160
Chris@82 161 #endif /* F77_FUNC */