1 `/* Implementation of the MATMUL intrinsic
2 Copyright (C) 2002-2017 Free Software Foundation, Inc.
3 Contributed by Paul Brook <paul@nowt.org>
5 This file is part of the GNU Fortran runtime library (libgfortran).
7 Libgfortran is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either
10 version 3 of the License, or (at your option) any later version.
12 Libgfortran is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
26 #include "libgfortran.h"
32 `#if defined (HAVE_'rtype_name`)
34 /* Prototype for the BLAS ?gemm subroutine, a pointer to which can be
35 passed to us by the front-end, in which case we call it for large
38 typedef void (*blas_call)(const char *, const char *, const int *, const int *,
39 const int *, const 'rtype_name` *, const 'rtype_name` *,
40 const int *, const 'rtype_name` *, const int *,
41 const 'rtype_name` *, 'rtype_name` *, const int *,
44 /* The order of loops is different in the case of plain matrix
45 multiplication C=MATMUL(A,B), and in the frequent special case where
46 the argument A is the temporary result of a TRANSPOSE intrinsic:
47 C=MATMUL(TRANSPOSE(A),B). Transposed temporaries are detected by
48 looking at their strides.
50 The equivalent Fortran pseudo-code is:
52 DIMENSION A(M,COUNT), B(COUNT,N), C(M,N)
53 IF (.NOT.IS_TRANSPOSED(A)) THEN
58 C(I,J) = C(I,J)+A(I,K)*B(K,J)
69 /* If try_blas is set to a nonzero value, then the matmul function will
70 see if there is a way to perform the matrix multiplication by a call
71 to the BLAS gemm function. */
73 extern void matmul_'rtype_code` ('rtype` * const restrict retarray,
74 'rtype` * const restrict a, 'rtype` * const restrict b, int try_blas,
75 int blas_limit, blas_call gemm);
76 export_proto(matmul_'rtype_code`);
78 /* Put exhaustive list of possible architectures here here, ORed together. */
80 #if defined(HAVE_AVX) || defined(HAVE_AVX2) || defined(HAVE_AVX512F)
83 'define(`matmul_name',`matmul_'rtype_code`_avx')dnl
85 'matmul_name` ('rtype` * const restrict retarray,
86 'rtype` * const restrict a, 'rtype` * const restrict b, int try_blas,
87 int blas_limit, blas_call gemm) __attribute__((__target__("avx")));
88 static' include(matmul_internal.m4)dnl
89 `#endif /* HAVE_AVX */
92 'define(`matmul_name',`matmul_'rtype_code`_avx2')dnl
94 'matmul_name` ('rtype` * const restrict retarray,
95 'rtype` * const restrict a, 'rtype` * const restrict b, int try_blas,
96 int blas_limit, blas_call gemm) __attribute__((__target__("avx2,fma")));
97 static' include(matmul_internal.m4)dnl
98 `#endif /* HAVE_AVX2 */
101 'define(`matmul_name',`matmul_'rtype_code`_avx512f')dnl
103 'matmul_name` ('rtype` * const restrict retarray,
104 'rtype` * const restrict a, 'rtype` * const restrict b, int try_blas,
105 int blas_limit, blas_call gemm) __attribute__((__target__("avx512f")));
106 static' include(matmul_internal.m4)dnl
107 `#endif /* HAVE_AVX512F */
109 /* Function to fall back to if there is no special processor-specific version. */
110 'define(`matmul_name',`matmul_'rtype_code`_vanilla')dnl
111 `static' include(matmul_internal.m4)dnl
113 `/* Compiling main function, with selection code for the processor. */
115 /* Currently, this is i386 only. Adjust for other architectures. */
117 #include <config/i386/cpuinfo.h>
118 void matmul_'rtype_code` ('rtype` * const restrict retarray,
119 'rtype` * const restrict a, 'rtype` * const restrict b, int try_blas,
120 int blas_limit, blas_call gemm)
122 static void (*matmul_p) ('rtype` * const restrict retarray,
123 'rtype` * const restrict a, 'rtype` * const restrict b, int try_blas,
124 int blas_limit, blas_call gemm);
126 void (*matmul_fn) ('rtype` * const restrict retarray,
127 'rtype` * const restrict a, 'rtype` * const restrict b, int try_blas,
128 int blas_limit, blas_call gemm);
130 matmul_fn = __atomic_load_n (&matmul_p, __ATOMIC_RELAXED);
131 if (matmul_fn == NULL)
133 matmul_fn = matmul_'rtype_code`_vanilla;
134 if (__cpu_model.__cpu_vendor == VENDOR_INTEL)
136 /* Run down the available processors in order of preference. */
138 if (__cpu_model.__cpu_features[0] & (1 << FEATURE_AVX512F))
140 matmul_fn = matmul_'rtype_code`_avx512f;
144 #endif /* HAVE_AVX512F */
147 if ((__cpu_model.__cpu_features[0] & (1 << FEATURE_AVX2))
148 && (__cpu_model.__cpu_features[0] & (1 << FEATURE_FMA)))
150 matmul_fn = matmul_'rtype_code`_avx2;
157 if (__cpu_model.__cpu_features[0] & (1 << FEATURE_AVX))
159 matmul_fn = matmul_'rtype_code`_avx;
162 #endif /* HAVE_AVX */
165 __atomic_store_n (&matmul_p, matmul_fn, __ATOMIC_RELAXED);
168 (*matmul_fn) (retarray, a, b, try_blas, blas_limit, gemm);
171 #else /* Just the vanilla function. */
173 'define(`matmul_name',`matmul_'rtype_code)dnl
174 define(`target_attribute',`')dnl
175 include(matmul_internal.m4)dnl