/* Implementation of the MATMUL intrinsic
- Copyright 2002, 2005, 2006 Free Software Foundation, Inc.
+ Copyright 2002, 2005, 2006, 2007 Free Software Foundation, Inc.
Contributed by Paul Brook <paul@nowt.org>
This file is part of the GNU Fortran 95 runtime library (libgfortran).
write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
-#include "config.h"
+#include "libgfortran.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
-#include "libgfortran.h"
+
#if defined (HAVE_GFC_COMPLEX_8)
+/* Prototype for the BLAS ?gemm subroutine, a pointer to which can be
+ passed to us by the front-end, in which case we'll call it for large
+ matrices. */
+
+typedef void (*blas_call)(const char *, const char *, const int *, const int *,
+ const int *, const GFC_COMPLEX_8 *, const GFC_COMPLEX_8 *,
+ const int *, const GFC_COMPLEX_8 *, const int *,
+ const GFC_COMPLEX_8 *, GFC_COMPLEX_8 *, const int *,
+ int, int);
+
/* The order of loops is different in the case of plain matrix
multiplication C=MATMUL(A,B), and in the frequent special case where
the argument A is the temporary result of a TRANSPOSE intrinsic:
DO I=1,M
S = 0
DO K=1,COUNT
- S = S+A(I,K)+B(K,J)
+ S = S+A(I,K)*B(K,J)
C(I,J) = S
ENDIF
*/
+/* If try_blas is set to a nonzero value, then the matmul function will
+ see if there is a way to perform the matrix multiplication by a call
+ to the BLAS gemm function. */
+
extern void matmul_c8 (gfc_array_c8 * const restrict retarray,
- gfc_array_c8 * const restrict a, gfc_array_c8 * const restrict b);
+ gfc_array_c8 * const restrict a, gfc_array_c8 * const restrict b, int try_blas,
+ int blas_limit, blas_call gemm);
export_proto(matmul_c8);
void
matmul_c8 (gfc_array_c8 * const restrict retarray,
- gfc_array_c8 * const restrict a, gfc_array_c8 * const restrict b)
+ gfc_array_c8 * const restrict a, gfc_array_c8 * const restrict b, int try_blas,
+ int blas_limit, blas_call gemm)
{
const GFC_COMPLEX_8 * restrict abase;
const GFC_COMPLEX_8 * restrict bbase;
= internal_malloc_size (sizeof (GFC_COMPLEX_8) * size0 ((array_t *) retarray));
retarray->offset = 0;
}
+ else if (compile_options.bounds_check)
+ {
+ index_type ret_extent, arg_extent;
+
+ if (GFC_DESCRIPTOR_RANK (a) == 1)
+ {
+ arg_extent = b->dim[1].ubound + 1 - b->dim[1].lbound;
+ ret_extent = retarray->dim[0].ubound + 1 - retarray->dim[0].lbound;
+ if (arg_extent != ret_extent)
+ runtime_error ("Incorrect extent in return array in"
+ " MATMUL intrinsic: is %ld, should be %ld",
+ (long int) ret_extent, (long int) arg_extent);
+ }
+ else if (GFC_DESCRIPTOR_RANK (b) == 1)
+ {
+ arg_extent = a->dim[0].ubound + 1 - a->dim[0].lbound;
+ ret_extent = retarray->dim[0].ubound + 1 - retarray->dim[0].lbound;
+ if (arg_extent != ret_extent)
+ runtime_error ("Incorrect extent in return array in"
+ " MATMUL intrinsic: is %ld, should be %ld",
+ (long int) ret_extent, (long int) arg_extent);
+ }
+ else
+ {
+ arg_extent = a->dim[0].ubound + 1 - a->dim[0].lbound;
+ ret_extent = retarray->dim[0].ubound + 1 - retarray->dim[0].lbound;
+ if (arg_extent != ret_extent)
+ runtime_error ("Incorrect extent in return array in"
+ " MATMUL intrinsic for dimension 1:"
+ " is %ld, should be %ld",
+ (long int) ret_extent, (long int) arg_extent);
+
+ arg_extent = b->dim[1].ubound + 1 - b->dim[1].lbound;
+ ret_extent = retarray->dim[1].ubound + 1 - retarray->dim[1].lbound;
+ if (arg_extent != ret_extent)
+ runtime_error ("Incorrect extent in return array in"
+ " MATMUL intrinsic for dimension 2:"
+ " is %ld, should be %ld",
+ (long int) ret_extent, (long int) arg_extent);
+ }
+ }
if (GFC_DESCRIPTOR_RANK (retarray) == 1)
xcount = a->dim[0].ubound + 1 - a->dim[0].lbound;
}
- assert(count == b->dim[0].ubound + 1 - b->dim[0].lbound);
+ if (count != b->dim[0].ubound + 1 - b->dim[0].lbound)
+ {
+ if (count > 0 || b->dim[0].ubound + 1 - b->dim[0].lbound > 0)
+ runtime_error ("dimension of array B incorrect in MATMUL intrinsic");
+ }
if (GFC_DESCRIPTOR_RANK (b) == 1)
{
bbase = b->data;
dest = retarray->data;
+
+ /* Now that everything is set up, we're performing the multiplication
+ itself. */
+
+#define POW3(x) (((float) (x)) * ((float) (x)) * ((float) (x)))
+
+ if (try_blas && rxstride == 1 && (axstride == 1 || aystride == 1)
+ && (bxstride == 1 || bystride == 1)
+ && (((float) xcount) * ((float) ycount) * ((float) count)
+ > POW3(blas_limit)))
+ {
+ const int m = xcount, n = ycount, k = count, ldc = rystride;
+ const GFC_COMPLEX_8 one = 1, zero = 0;
+ const int lda = (axstride == 1) ? aystride : axstride,
+ ldb = (bxstride == 1) ? bystride : bxstride;
+
+ if (lda > 0 && ldb > 0 && ldc > 0 && m > 1 && n > 1 && k > 1)
+ {
+ assert (gemm != NULL);
+ gemm (axstride == 1 ? "N" : "T", bxstride == 1 ? "N" : "T", &m, &n, &k,
+ &one, abase, &lda, bbase, &ldb, &zero, dest, &ldc, 1, 1);
+ return;
+ }
+ }
+
if (rxstride == 1 && axstride == 1 && bxstride == 1)
{
const GFC_COMPLEX_8 * restrict bbase_y;
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