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gcc/libgfortran/m4/unpack.m4

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`/* Specific implementation of the UNPACK intrinsic
Copyright (C) 2008-2022 Free Software Foundation, Inc.
Contributed by Thomas Koenig <tkoenig@gcc.gnu.org>, based on
unpack_generic.c by Paul Brook <paul@nowt.org>.
This file is part of the GNU Fortran runtime library (libgfortran).
Libgfortran is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
Ligbfortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgfortran.h"
#include <string.h>'
include(iparm.m4)dnl
`#if defined (HAVE_'rtype_name`)
void
unpack0_'rtype_code` ('rtype` *ret, const 'rtype` *vector,
const gfc_array_l1 *mask, const 'rtype_name` *fptr)
{
/* r.* indicates the return array. */
index_type rstride[GFC_MAX_DIMENSIONS];
index_type rstride0;
index_type rs;
'rtype_name` * restrict rptr;
/* v.* indicates the vector array. */
index_type vstride0;
'rtype_name` *vptr;
/* Value for field, this is constant. */
const 'rtype_name` fval = *fptr;
/* m.* indicates the mask array. */
index_type mstride[GFC_MAX_DIMENSIONS];
index_type mstride0;
const GFC_LOGICAL_1 *mptr;
index_type count[GFC_MAX_DIMENSIONS];
index_type extent[GFC_MAX_DIMENSIONS];
index_type n;
index_type dim;
int empty;
int mask_kind;
empty = 0;
mptr = mask->base_addr;
/* Use the same loop for all logical types, by using GFC_LOGICAL_1
and using shifting to address size and endian issues. */
mask_kind = GFC_DESCRIPTOR_SIZE (mask);
if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
#ifdef HAVE_GFC_LOGICAL_16
|| mask_kind == 16
#endif
)
{
/* Do not convert a NULL pointer as we use test for NULL below. */
if (mptr)
mptr = GFOR_POINTER_TO_L1 (mptr, mask_kind);
}
else
runtime_error ("Funny sized logical array");
/* Initialize to avoid -Wmaybe-uninitialized complaints. */
rstride[0] = 1;
if (ret->base_addr == NULL)
{
/* The front end has signalled that we need to populate the
return array descriptor. */
dim = GFC_DESCRIPTOR_RANK (mask);
rs = 1;
for (n = 0; n < dim; n++)
{
count[n] = 0;
GFC_DIMENSION_SET(ret->dim[n], 0,
GFC_DESCRIPTOR_EXTENT(mask,n) - 1, rs);
extent[n] = GFC_DESCRIPTOR_EXTENT(ret,n);
empty = empty || extent[n] <= 0;
rstride[n] = GFC_DESCRIPTOR_STRIDE(ret,n);
mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask,n);
rs *= extent[n];
}
ret->offset = 0;
ret->base_addr = xmallocarray (rs, sizeof ('rtype_name`));
}
else
{
dim = GFC_DESCRIPTOR_RANK (ret);
for (n = 0; n < dim; n++)
{
count[n] = 0;
extent[n] = GFC_DESCRIPTOR_EXTENT(ret,n);
empty = empty || extent[n] <= 0;
rstride[n] = GFC_DESCRIPTOR_STRIDE(ret,n);
mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask,n);
}
if (rstride[0] == 0)
rstride[0] = 1;
}
if (empty)
return;
if (mstride[0] == 0)
mstride[0] = 1;
vstride0 = GFC_DESCRIPTOR_STRIDE(vector,0);
if (vstride0 == 0)
vstride0 = 1;
rstride0 = rstride[0];
mstride0 = mstride[0];
rptr = ret->base_addr;
vptr = vector->base_addr;
while (rptr)
{
if (*mptr)
{
/* From vector. */
*rptr = *vptr;
vptr += vstride0;
}
else
{
/* From field. */
*rptr = fval;
}
/* Advance to the next element. */
rptr += rstride0;
mptr += mstride0;
count[0]++;
n = 0;
while (count[n] == extent[n])
{
/* When we get to the end of a dimension, reset it and increment
the next dimension. */
count[n] = 0;
/* We could precalculate these products, but this is a less
frequently used path so probably not worth it. */
rptr -= rstride[n] * extent[n];
mptr -= mstride[n] * extent[n];
n++;
if (n >= dim)
{
/* Break out of the loop. */
rptr = NULL;
break;
}
else
{
count[n]++;
rptr += rstride[n];
mptr += mstride[n];
}
}
}
}
void
unpack1_'rtype_code` ('rtype` *ret, const 'rtype` *vector,
const gfc_array_l1 *mask, const 'rtype` *field)
{
/* r.* indicates the return array. */
index_type rstride[GFC_MAX_DIMENSIONS];
index_type rstride0;
index_type rs;
'rtype_name` * restrict rptr;
/* v.* indicates the vector array. */
index_type vstride0;
'rtype_name` *vptr;
/* f.* indicates the field array. */
index_type fstride[GFC_MAX_DIMENSIONS];
index_type fstride0;
const 'rtype_name` *fptr;
/* m.* indicates the mask array. */
index_type mstride[GFC_MAX_DIMENSIONS];
index_type mstride0;
const GFC_LOGICAL_1 *mptr;
index_type count[GFC_MAX_DIMENSIONS];
index_type extent[GFC_MAX_DIMENSIONS];
index_type n;
index_type dim;
int empty;
int mask_kind;
empty = 0;
mptr = mask->base_addr;
/* Use the same loop for all logical types, by using GFC_LOGICAL_1
and using shifting to address size and endian issues. */
mask_kind = GFC_DESCRIPTOR_SIZE (mask);
if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
#ifdef HAVE_GFC_LOGICAL_16
|| mask_kind == 16
#endif
)
{
/* Do not convert a NULL pointer as we use test for NULL below. */
if (mptr)
mptr = GFOR_POINTER_TO_L1 (mptr, mask_kind);
}
else
runtime_error ("Funny sized logical array");
/* Initialize to avoid -Wmaybe-uninitialized complaints. */
rstride[0] = 1;
if (ret->base_addr == NULL)
{
/* The front end has signalled that we need to populate the
return array descriptor. */
dim = GFC_DESCRIPTOR_RANK (mask);
rs = 1;
for (n = 0; n < dim; n++)
{
count[n] = 0;
GFC_DIMENSION_SET(ret->dim[n], 0,
GFC_DESCRIPTOR_EXTENT(mask,n) - 1, rs);
extent[n] = GFC_DESCRIPTOR_EXTENT(ret,n);
empty = empty || extent[n] <= 0;
rstride[n] = GFC_DESCRIPTOR_STRIDE(ret,n);
fstride[n] = GFC_DESCRIPTOR_STRIDE(field,n);
mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask,n);
rs *= extent[n];
}
ret->offset = 0;
ret->base_addr = xmallocarray (rs, sizeof ('rtype_name`));
}
else
{
dim = GFC_DESCRIPTOR_RANK (ret);
for (n = 0; n < dim; n++)
{
count[n] = 0;
extent[n] = GFC_DESCRIPTOR_EXTENT(ret,n);
empty = empty || extent[n] <= 0;
rstride[n] = GFC_DESCRIPTOR_STRIDE(ret,n);
fstride[n] = GFC_DESCRIPTOR_STRIDE(field,n);
mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask,n);
}
if (rstride[0] == 0)
rstride[0] = 1;
}
if (empty)
return;
if (fstride[0] == 0)
fstride[0] = 1;
if (mstride[0] == 0)
mstride[0] = 1;
vstride0 = GFC_DESCRIPTOR_STRIDE(vector,0);
if (vstride0 == 0)
vstride0 = 1;
rstride0 = rstride[0];
fstride0 = fstride[0];
mstride0 = mstride[0];
rptr = ret->base_addr;
fptr = field->base_addr;
vptr = vector->base_addr;
while (rptr)
{
if (*mptr)
{
/* From vector. */
*rptr = *vptr;
vptr += vstride0;
}
else
{
/* From field. */
*rptr = *fptr;
}
/* Advance to the next element. */
rptr += rstride0;
fptr += fstride0;
mptr += mstride0;
count[0]++;
n = 0;
while (count[n] == extent[n])
{
/* When we get to the end of a dimension, reset it and increment
the next dimension. */
count[n] = 0;
/* We could precalculate these products, but this is a less
frequently used path so probably not worth it. */
rptr -= rstride[n] * extent[n];
fptr -= fstride[n] * extent[n];
mptr -= mstride[n] * extent[n];
n++;
if (n >= dim)
{
/* Break out of the loop. */
rptr = NULL;
break;
}
else
{
count[n]++;
rptr += rstride[n];
fptr += fstride[n];
mptr += mstride[n];
}
}
}
}
#endif
'
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