/* Lower vector operations to scalar operations.
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/* Lower vector operations to scalar operations.
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Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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This file is part of GCC.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "config.h"
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#include "system.h"
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#include "system.h"
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#include "coretypes.h"
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#include "coretypes.h"
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#include "tree.h"
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#include "tree.h"
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#include "tm.h"
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#include "tm.h"
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#include "rtl.h"
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#include "rtl.h"
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#include "expr.h"
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#include "expr.h"
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#include "insn-codes.h"
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#include "insn-codes.h"
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#include "diagnostic.h"
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#include "diagnostic.h"
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#include "optabs.h"
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#include "optabs.h"
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#include "machmode.h"
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#include "machmode.h"
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#include "langhooks.h"
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#include "langhooks.h"
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#include "tree-flow.h"
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#include "tree-flow.h"
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#include "tree-gimple.h"
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#include "tree-gimple.h"
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#include "tree-iterator.h"
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#include "tree-iterator.h"
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#include "tree-pass.h"
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#include "tree-pass.h"
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#include "flags.h"
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#include "flags.h"
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#include "ggc.h"
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#include "ggc.h"
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/* Build a constant of type TYPE, made of VALUE's bits replicated
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/* Build a constant of type TYPE, made of VALUE's bits replicated
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every TYPE_SIZE (INNER_TYPE) bits to fit TYPE's precision. */
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every TYPE_SIZE (INNER_TYPE) bits to fit TYPE's precision. */
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static tree
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static tree
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build_replicated_const (tree type, tree inner_type, HOST_WIDE_INT value)
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build_replicated_const (tree type, tree inner_type, HOST_WIDE_INT value)
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{
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{
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int width = tree_low_cst (TYPE_SIZE (inner_type), 1);
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int width = tree_low_cst (TYPE_SIZE (inner_type), 1);
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int n = HOST_BITS_PER_WIDE_INT / width;
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int n = HOST_BITS_PER_WIDE_INT / width;
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unsigned HOST_WIDE_INT low, high, mask;
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unsigned HOST_WIDE_INT low, high, mask;
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tree ret;
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tree ret;
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gcc_assert (n);
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gcc_assert (n);
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if (width == HOST_BITS_PER_WIDE_INT)
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if (width == HOST_BITS_PER_WIDE_INT)
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low = value;
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low = value;
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else
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else
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{
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{
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mask = ((HOST_WIDE_INT)1 << width) - 1;
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mask = ((HOST_WIDE_INT)1 << width) - 1;
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low = (unsigned HOST_WIDE_INT) ~0 / mask * (value & mask);
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low = (unsigned HOST_WIDE_INT) ~0 / mask * (value & mask);
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}
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}
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if (TYPE_PRECISION (type) < HOST_BITS_PER_WIDE_INT)
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if (TYPE_PRECISION (type) < HOST_BITS_PER_WIDE_INT)
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low &= ((HOST_WIDE_INT)1 << TYPE_PRECISION (type)) - 1, high = 0;
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low &= ((HOST_WIDE_INT)1 << TYPE_PRECISION (type)) - 1, high = 0;
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else if (TYPE_PRECISION (type) == HOST_BITS_PER_WIDE_INT)
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else if (TYPE_PRECISION (type) == HOST_BITS_PER_WIDE_INT)
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high = 0;
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high = 0;
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else if (TYPE_PRECISION (type) == 2 * HOST_BITS_PER_WIDE_INT)
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else if (TYPE_PRECISION (type) == 2 * HOST_BITS_PER_WIDE_INT)
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high = low;
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high = low;
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else
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else
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gcc_unreachable ();
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gcc_unreachable ();
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ret = build_int_cst_wide (type, low, high);
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ret = build_int_cst_wide (type, low, high);
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return ret;
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return ret;
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}
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}
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static GTY(()) tree vector_inner_type;
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static GTY(()) tree vector_inner_type;
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static GTY(()) tree vector_last_type;
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static GTY(()) tree vector_last_type;
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static GTY(()) int vector_last_nunits;
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static GTY(()) int vector_last_nunits;
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/* Return a suitable vector types made of SUBPARTS units each of mode
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/* Return a suitable vector types made of SUBPARTS units each of mode
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"word_mode" (the global variable). */
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"word_mode" (the global variable). */
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static tree
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static tree
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build_word_mode_vector_type (int nunits)
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build_word_mode_vector_type (int nunits)
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{
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{
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if (!vector_inner_type)
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if (!vector_inner_type)
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vector_inner_type = lang_hooks.types.type_for_mode (word_mode, 1);
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vector_inner_type = lang_hooks.types.type_for_mode (word_mode, 1);
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else if (vector_last_nunits == nunits)
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else if (vector_last_nunits == nunits)
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{
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{
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gcc_assert (TREE_CODE (vector_last_type) == VECTOR_TYPE);
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gcc_assert (TREE_CODE (vector_last_type) == VECTOR_TYPE);
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return vector_last_type;
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return vector_last_type;
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}
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}
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/* We build a new type, but we canonicalize it nevertheless,
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/* We build a new type, but we canonicalize it nevertheless,
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because it still saves some memory. */
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because it still saves some memory. */
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vector_last_nunits = nunits;
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vector_last_nunits = nunits;
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vector_last_type = type_hash_canon (nunits,
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vector_last_type = type_hash_canon (nunits,
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build_vector_type (vector_inner_type,
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build_vector_type (vector_inner_type,
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nunits));
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nunits));
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return vector_last_type;
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return vector_last_type;
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}
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}
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typedef tree (*elem_op_func) (block_stmt_iterator *,
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typedef tree (*elem_op_func) (block_stmt_iterator *,
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tree, tree, tree, tree, tree, enum tree_code);
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tree, tree, tree, tree, tree, enum tree_code);
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static inline tree
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static inline tree
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tree_vec_extract (block_stmt_iterator *bsi, tree type,
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tree_vec_extract (block_stmt_iterator *bsi, tree type,
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tree t, tree bitsize, tree bitpos)
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tree t, tree bitsize, tree bitpos)
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{
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{
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if (bitpos)
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if (bitpos)
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return gimplify_build3 (bsi, BIT_FIELD_REF, type, t, bitsize, bitpos);
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return gimplify_build3 (bsi, BIT_FIELD_REF, type, t, bitsize, bitpos);
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else
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else
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return gimplify_build1 (bsi, VIEW_CONVERT_EXPR, type, t);
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return gimplify_build1 (bsi, VIEW_CONVERT_EXPR, type, t);
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}
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}
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static tree
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static tree
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do_unop (block_stmt_iterator *bsi, tree inner_type, tree a,
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do_unop (block_stmt_iterator *bsi, tree inner_type, tree a,
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tree b ATTRIBUTE_UNUSED, tree bitpos, tree bitsize,
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tree b ATTRIBUTE_UNUSED, tree bitpos, tree bitsize,
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enum tree_code code)
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enum tree_code code)
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{
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{
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a = tree_vec_extract (bsi, inner_type, a, bitsize, bitpos);
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a = tree_vec_extract (bsi, inner_type, a, bitsize, bitpos);
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return gimplify_build1 (bsi, code, inner_type, a);
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return gimplify_build1 (bsi, code, inner_type, a);
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}
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}
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static tree
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static tree
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do_binop (block_stmt_iterator *bsi, tree inner_type, tree a, tree b,
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do_binop (block_stmt_iterator *bsi, tree inner_type, tree a, tree b,
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tree bitpos, tree bitsize, enum tree_code code)
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tree bitpos, tree bitsize, enum tree_code code)
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{
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{
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a = tree_vec_extract (bsi, inner_type, a, bitsize, bitpos);
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a = tree_vec_extract (bsi, inner_type, a, bitsize, bitpos);
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b = tree_vec_extract (bsi, inner_type, b, bitsize, bitpos);
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b = tree_vec_extract (bsi, inner_type, b, bitsize, bitpos);
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return gimplify_build2 (bsi, code, inner_type, a, b);
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return gimplify_build2 (bsi, code, inner_type, a, b);
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}
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}
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/* Expand vector addition to scalars. This does bit twiddling
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/* Expand vector addition to scalars. This does bit twiddling
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in order to increase parallelism:
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in order to increase parallelism:
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a + b = (((int) a & 0x7f7f7f7f) + ((int) b & 0x7f7f7f7f)) ^
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a + b = (((int) a & 0x7f7f7f7f) + ((int) b & 0x7f7f7f7f)) ^
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(a ^ b) & 0x80808080
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(a ^ b) & 0x80808080
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a - b = (((int) a | 0x80808080) - ((int) b & 0x7f7f7f7f)) ^
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a - b = (((int) a | 0x80808080) - ((int) b & 0x7f7f7f7f)) ^
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(a ^ ~b) & 0x80808080
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(a ^ ~b) & 0x80808080
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-b = (0x80808080 - ((int) b & 0x7f7f7f7f)) ^ (~b & 0x80808080)
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-b = (0x80808080 - ((int) b & 0x7f7f7f7f)) ^ (~b & 0x80808080)
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This optimization should be done only if 4 vector items or more
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This optimization should be done only if 4 vector items or more
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fit into a word. */
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fit into a word. */
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static tree
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static tree
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do_plus_minus (block_stmt_iterator *bsi, tree word_type, tree a, tree b,
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do_plus_minus (block_stmt_iterator *bsi, tree word_type, tree a, tree b,
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tree bitpos ATTRIBUTE_UNUSED, tree bitsize ATTRIBUTE_UNUSED,
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tree bitpos ATTRIBUTE_UNUSED, tree bitsize ATTRIBUTE_UNUSED,
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enum tree_code code)
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enum tree_code code)
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{
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{
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tree inner_type = TREE_TYPE (TREE_TYPE (a));
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tree inner_type = TREE_TYPE (TREE_TYPE (a));
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unsigned HOST_WIDE_INT max;
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unsigned HOST_WIDE_INT max;
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tree low_bits, high_bits, a_low, b_low, result_low, signs;
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tree low_bits, high_bits, a_low, b_low, result_low, signs;
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max = GET_MODE_MASK (TYPE_MODE (inner_type));
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max = GET_MODE_MASK (TYPE_MODE (inner_type));
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low_bits = build_replicated_const (word_type, inner_type, max >> 1);
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low_bits = build_replicated_const (word_type, inner_type, max >> 1);
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high_bits = build_replicated_const (word_type, inner_type, max & ~(max >> 1));
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high_bits = build_replicated_const (word_type, inner_type, max & ~(max >> 1));
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a = tree_vec_extract (bsi, word_type, a, bitsize, bitpos);
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a = tree_vec_extract (bsi, word_type, a, bitsize, bitpos);
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b = tree_vec_extract (bsi, word_type, b, bitsize, bitpos);
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b = tree_vec_extract (bsi, word_type, b, bitsize, bitpos);
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signs = gimplify_build2 (bsi, BIT_XOR_EXPR, word_type, a, b);
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signs = gimplify_build2 (bsi, BIT_XOR_EXPR, word_type, a, b);
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b_low = gimplify_build2 (bsi, BIT_AND_EXPR, word_type, b, low_bits);
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b_low = gimplify_build2 (bsi, BIT_AND_EXPR, word_type, b, low_bits);
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if (code == PLUS_EXPR)
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if (code == PLUS_EXPR)
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a_low = gimplify_build2 (bsi, BIT_AND_EXPR, word_type, a, low_bits);
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a_low = gimplify_build2 (bsi, BIT_AND_EXPR, word_type, a, low_bits);
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else
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else
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{
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{
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a_low = gimplify_build2 (bsi, BIT_IOR_EXPR, word_type, a, high_bits);
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a_low = gimplify_build2 (bsi, BIT_IOR_EXPR, word_type, a, high_bits);
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signs = gimplify_build1 (bsi, BIT_NOT_EXPR, word_type, signs);
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signs = gimplify_build1 (bsi, BIT_NOT_EXPR, word_type, signs);
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}
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}
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signs = gimplify_build2 (bsi, BIT_AND_EXPR, word_type, signs, high_bits);
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signs = gimplify_build2 (bsi, BIT_AND_EXPR, word_type, signs, high_bits);
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result_low = gimplify_build2 (bsi, code, word_type, a_low, b_low);
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result_low = gimplify_build2 (bsi, code, word_type, a_low, b_low);
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return gimplify_build2 (bsi, BIT_XOR_EXPR, word_type, result_low, signs);
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return gimplify_build2 (bsi, BIT_XOR_EXPR, word_type, result_low, signs);
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}
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}
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static tree
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static tree
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do_negate (block_stmt_iterator *bsi, tree word_type, tree b,
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do_negate (block_stmt_iterator *bsi, tree word_type, tree b,
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tree unused ATTRIBUTE_UNUSED, tree bitpos ATTRIBUTE_UNUSED,
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tree unused ATTRIBUTE_UNUSED, tree bitpos ATTRIBUTE_UNUSED,
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tree bitsize ATTRIBUTE_UNUSED,
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tree bitsize ATTRIBUTE_UNUSED,
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enum tree_code code ATTRIBUTE_UNUSED)
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enum tree_code code ATTRIBUTE_UNUSED)
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{
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{
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tree inner_type = TREE_TYPE (TREE_TYPE (b));
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tree inner_type = TREE_TYPE (TREE_TYPE (b));
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HOST_WIDE_INT max;
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HOST_WIDE_INT max;
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tree low_bits, high_bits, b_low, result_low, signs;
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tree low_bits, high_bits, b_low, result_low, signs;
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max = GET_MODE_MASK (TYPE_MODE (inner_type));
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max = GET_MODE_MASK (TYPE_MODE (inner_type));
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low_bits = build_replicated_const (word_type, inner_type, max >> 1);
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low_bits = build_replicated_const (word_type, inner_type, max >> 1);
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high_bits = build_replicated_const (word_type, inner_type, max & ~(max >> 1));
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high_bits = build_replicated_const (word_type, inner_type, max & ~(max >> 1));
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b = tree_vec_extract (bsi, word_type, b, bitsize, bitpos);
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b = tree_vec_extract (bsi, word_type, b, bitsize, bitpos);
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b_low = gimplify_build2 (bsi, BIT_AND_EXPR, word_type, b, low_bits);
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b_low = gimplify_build2 (bsi, BIT_AND_EXPR, word_type, b, low_bits);
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signs = gimplify_build1 (bsi, BIT_NOT_EXPR, word_type, b);
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signs = gimplify_build1 (bsi, BIT_NOT_EXPR, word_type, b);
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signs = gimplify_build2 (bsi, BIT_AND_EXPR, word_type, signs, high_bits);
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signs = gimplify_build2 (bsi, BIT_AND_EXPR, word_type, signs, high_bits);
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result_low = gimplify_build2 (bsi, MINUS_EXPR, word_type, high_bits, b_low);
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result_low = gimplify_build2 (bsi, MINUS_EXPR, word_type, high_bits, b_low);
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return gimplify_build2 (bsi, BIT_XOR_EXPR, word_type, result_low, signs);
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return gimplify_build2 (bsi, BIT_XOR_EXPR, word_type, result_low, signs);
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}
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}
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/* Expand a vector operation to scalars, by using many operations
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/* Expand a vector operation to scalars, by using many operations
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whose type is the vector type's inner type. */
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whose type is the vector type's inner type. */
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static tree
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static tree
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expand_vector_piecewise (block_stmt_iterator *bsi, elem_op_func f,
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expand_vector_piecewise (block_stmt_iterator *bsi, elem_op_func f,
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tree type, tree inner_type,
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tree type, tree inner_type,
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tree a, tree b, enum tree_code code)
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tree a, tree b, enum tree_code code)
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{
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{
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VEC(constructor_elt,gc) *v;
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VEC(constructor_elt,gc) *v;
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tree part_width = TYPE_SIZE (inner_type);
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tree part_width = TYPE_SIZE (inner_type);
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tree index = bitsize_int (0);
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tree index = bitsize_int (0);
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int nunits = TYPE_VECTOR_SUBPARTS (type);
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int nunits = TYPE_VECTOR_SUBPARTS (type);
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int delta = tree_low_cst (part_width, 1)
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int delta = tree_low_cst (part_width, 1)
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/ tree_low_cst (TYPE_SIZE (TREE_TYPE (type)), 1);
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/ tree_low_cst (TYPE_SIZE (TREE_TYPE (type)), 1);
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int i;
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int i;
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|
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v = VEC_alloc(constructor_elt, gc, (nunits + delta - 1) / delta);
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v = VEC_alloc(constructor_elt, gc, (nunits + delta - 1) / delta);
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for (i = 0; i < nunits;
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for (i = 0; i < nunits;
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i += delta, index = int_const_binop (PLUS_EXPR, index, part_width, 0))
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i += delta, index = int_const_binop (PLUS_EXPR, index, part_width, 0))
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{
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{
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tree result = f (bsi, inner_type, a, b, index, part_width, code);
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tree result = f (bsi, inner_type, a, b, index, part_width, code);
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constructor_elt *ce = VEC_quick_push (constructor_elt, v, NULL);
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constructor_elt *ce = VEC_quick_push (constructor_elt, v, NULL);
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ce->index = NULL_TREE;
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ce->index = NULL_TREE;
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ce->value = result;
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ce->value = result;
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}
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}
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return build_constructor (type, v);
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return build_constructor (type, v);
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}
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}
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/* Expand a vector operation to scalars with the freedom to use
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/* Expand a vector operation to scalars with the freedom to use
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a scalar integer type, or to use a different size for the items
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a scalar integer type, or to use a different size for the items
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in the vector type. */
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in the vector type. */
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static tree
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static tree
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expand_vector_parallel (block_stmt_iterator *bsi, elem_op_func f, tree type,
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expand_vector_parallel (block_stmt_iterator *bsi, elem_op_func f, tree type,
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tree a, tree b,
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tree a, tree b,
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enum tree_code code)
|
enum tree_code code)
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{
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{
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tree result, compute_type;
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tree result, compute_type;
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enum machine_mode mode;
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enum machine_mode mode;
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int n_words = tree_low_cst (TYPE_SIZE_UNIT (type), 1) / UNITS_PER_WORD;
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int n_words = tree_low_cst (TYPE_SIZE_UNIT (type), 1) / UNITS_PER_WORD;
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|
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/* We have three strategies. If the type is already correct, just do
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/* We have three strategies. If the type is already correct, just do
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the operation an element at a time. Else, if the vector is wider than
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the operation an element at a time. Else, if the vector is wider than
|
one word, do it a word at a time; finally, if the vector is smaller
|
one word, do it a word at a time; finally, if the vector is smaller
|
than one word, do it as a scalar. */
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than one word, do it as a scalar. */
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if (TYPE_MODE (TREE_TYPE (type)) == word_mode)
|
if (TYPE_MODE (TREE_TYPE (type)) == word_mode)
|
return expand_vector_piecewise (bsi, f,
|
return expand_vector_piecewise (bsi, f,
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type, TREE_TYPE (type),
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type, TREE_TYPE (type),
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a, b, code);
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a, b, code);
|
else if (n_words > 1)
|
else if (n_words > 1)
|
{
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{
|
tree word_type = build_word_mode_vector_type (n_words);
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tree word_type = build_word_mode_vector_type (n_words);
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result = expand_vector_piecewise (bsi, f,
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result = expand_vector_piecewise (bsi, f,
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word_type, TREE_TYPE (word_type),
|
word_type, TREE_TYPE (word_type),
|
a, b, code);
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a, b, code);
|
result = gimplify_val (bsi, word_type, result);
|
result = gimplify_val (bsi, word_type, result);
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Use a single scalar operation with a mode no wider than word_mode. */
|
/* Use a single scalar operation with a mode no wider than word_mode. */
|
mode = mode_for_size (tree_low_cst (TYPE_SIZE (type), 1), MODE_INT, 0);
|
mode = mode_for_size (tree_low_cst (TYPE_SIZE (type), 1), MODE_INT, 0);
|
compute_type = lang_hooks.types.type_for_mode (mode, 1);
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compute_type = lang_hooks.types.type_for_mode (mode, 1);
|
result = f (bsi, compute_type, a, b, NULL_TREE, NULL_TREE, code);
|
result = f (bsi, compute_type, a, b, NULL_TREE, NULL_TREE, code);
|
}
|
}
|
|
|
return result;
|
return result;
|
}
|
}
|
|
|
/* Expand a vector operation to scalars; for integer types we can use
|
/* Expand a vector operation to scalars; for integer types we can use
|
special bit twiddling tricks to do the sums a word at a time, using
|
special bit twiddling tricks to do the sums a word at a time, using
|
function F_PARALLEL instead of F. These tricks are done only if
|
function F_PARALLEL instead of F. These tricks are done only if
|
they can process at least four items, that is, only if the vector
|
they can process at least four items, that is, only if the vector
|
holds at least four items and if a word can hold four items. */
|
holds at least four items and if a word can hold four items. */
|
static tree
|
static tree
|
expand_vector_addition (block_stmt_iterator *bsi,
|
expand_vector_addition (block_stmt_iterator *bsi,
|
elem_op_func f, elem_op_func f_parallel,
|
elem_op_func f, elem_op_func f_parallel,
|
tree type, tree a, tree b, enum tree_code code)
|
tree type, tree a, tree b, enum tree_code code)
|
{
|
{
|
int parts_per_word = UNITS_PER_WORD
|
int parts_per_word = UNITS_PER_WORD
|
/ tree_low_cst (TYPE_SIZE_UNIT (TREE_TYPE (type)), 1);
|
/ tree_low_cst (TYPE_SIZE_UNIT (TREE_TYPE (type)), 1);
|
|
|
if (INTEGRAL_TYPE_P (TREE_TYPE (type))
|
if (INTEGRAL_TYPE_P (TREE_TYPE (type))
|
&& parts_per_word >= 4
|
&& parts_per_word >= 4
|
&& TYPE_VECTOR_SUBPARTS (type) >= 4)
|
&& TYPE_VECTOR_SUBPARTS (type) >= 4)
|
return expand_vector_parallel (bsi, f_parallel,
|
return expand_vector_parallel (bsi, f_parallel,
|
type, a, b, code);
|
type, a, b, code);
|
else
|
else
|
return expand_vector_piecewise (bsi, f,
|
return expand_vector_piecewise (bsi, f,
|
type, TREE_TYPE (type),
|
type, TREE_TYPE (type),
|
a, b, code);
|
a, b, code);
|
}
|
}
|
|
|
static tree
|
static tree
|
expand_vector_operation (block_stmt_iterator *bsi, tree type, tree compute_type,
|
expand_vector_operation (block_stmt_iterator *bsi, tree type, tree compute_type,
|
tree rhs, enum tree_code code)
|
tree rhs, enum tree_code code)
|
{
|
{
|
enum machine_mode compute_mode = TYPE_MODE (compute_type);
|
enum machine_mode compute_mode = TYPE_MODE (compute_type);
|
|
|
/* If the compute mode is not a vector mode (hence we are not decomposing
|
/* If the compute mode is not a vector mode (hence we are not decomposing
|
a BLKmode vector to smaller, hardware-supported vectors), we may want
|
a BLKmode vector to smaller, hardware-supported vectors), we may want
|
to expand the operations in parallel. */
|
to expand the operations in parallel. */
|
if (GET_MODE_CLASS (compute_mode) != MODE_VECTOR_INT
|
if (GET_MODE_CLASS (compute_mode) != MODE_VECTOR_INT
|
&& GET_MODE_CLASS (compute_mode) != MODE_VECTOR_FLOAT)
|
&& GET_MODE_CLASS (compute_mode) != MODE_VECTOR_FLOAT)
|
switch (code)
|
switch (code)
|
{
|
{
|
case PLUS_EXPR:
|
case PLUS_EXPR:
|
case MINUS_EXPR:
|
case MINUS_EXPR:
|
if (!TYPE_OVERFLOW_TRAPS (type))
|
if (!TYPE_OVERFLOW_TRAPS (type))
|
return expand_vector_addition (bsi, do_binop, do_plus_minus, type,
|
return expand_vector_addition (bsi, do_binop, do_plus_minus, type,
|
TREE_OPERAND (rhs, 0),
|
TREE_OPERAND (rhs, 0),
|
TREE_OPERAND (rhs, 1), code);
|
TREE_OPERAND (rhs, 1), code);
|
break;
|
break;
|
|
|
case NEGATE_EXPR:
|
case NEGATE_EXPR:
|
if (!TYPE_OVERFLOW_TRAPS (type))
|
if (!TYPE_OVERFLOW_TRAPS (type))
|
return expand_vector_addition (bsi, do_unop, do_negate, type,
|
return expand_vector_addition (bsi, do_unop, do_negate, type,
|
TREE_OPERAND (rhs, 0),
|
TREE_OPERAND (rhs, 0),
|
NULL_TREE, code);
|
NULL_TREE, code);
|
break;
|
break;
|
|
|
case BIT_AND_EXPR:
|
case BIT_AND_EXPR:
|
case BIT_IOR_EXPR:
|
case BIT_IOR_EXPR:
|
case BIT_XOR_EXPR:
|
case BIT_XOR_EXPR:
|
return expand_vector_parallel (bsi, do_binop, type,
|
return expand_vector_parallel (bsi, do_binop, type,
|
TREE_OPERAND (rhs, 0),
|
TREE_OPERAND (rhs, 0),
|
TREE_OPERAND (rhs, 1), code);
|
TREE_OPERAND (rhs, 1), code);
|
|
|
case BIT_NOT_EXPR:
|
case BIT_NOT_EXPR:
|
return expand_vector_parallel (bsi, do_unop, type,
|
return expand_vector_parallel (bsi, do_unop, type,
|
TREE_OPERAND (rhs, 0),
|
TREE_OPERAND (rhs, 0),
|
NULL_TREE, code);
|
NULL_TREE, code);
|
|
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
|
|
if (TREE_CODE_CLASS (code) == tcc_unary)
|
if (TREE_CODE_CLASS (code) == tcc_unary)
|
return expand_vector_piecewise (bsi, do_unop, type, compute_type,
|
return expand_vector_piecewise (bsi, do_unop, type, compute_type,
|
TREE_OPERAND (rhs, 0),
|
TREE_OPERAND (rhs, 0),
|
NULL_TREE, code);
|
NULL_TREE, code);
|
else
|
else
|
return expand_vector_piecewise (bsi, do_binop, type, compute_type,
|
return expand_vector_piecewise (bsi, do_binop, type, compute_type,
|
TREE_OPERAND (rhs, 0),
|
TREE_OPERAND (rhs, 0),
|
TREE_OPERAND (rhs, 1), code);
|
TREE_OPERAND (rhs, 1), code);
|
}
|
}
|
|
|
/* Return a type for the widest vector mode whose components are of mode
|
/* Return a type for the widest vector mode whose components are of mode
|
INNER_MODE, or NULL_TREE if none is found. */
|
INNER_MODE, or NULL_TREE if none is found. */
|
static tree
|
static tree
|
type_for_widest_vector_mode (enum machine_mode inner_mode, optab op)
|
type_for_widest_vector_mode (enum machine_mode inner_mode, optab op)
|
{
|
{
|
enum machine_mode best_mode = VOIDmode, mode;
|
enum machine_mode best_mode = VOIDmode, mode;
|
int best_nunits = 0;
|
int best_nunits = 0;
|
|
|
if (SCALAR_FLOAT_MODE_P (inner_mode))
|
if (SCALAR_FLOAT_MODE_P (inner_mode))
|
mode = MIN_MODE_VECTOR_FLOAT;
|
mode = MIN_MODE_VECTOR_FLOAT;
|
else
|
else
|
mode = MIN_MODE_VECTOR_INT;
|
mode = MIN_MODE_VECTOR_INT;
|
|
|
for (; mode != VOIDmode; mode = GET_MODE_WIDER_MODE (mode))
|
for (; mode != VOIDmode; mode = GET_MODE_WIDER_MODE (mode))
|
if (GET_MODE_INNER (mode) == inner_mode
|
if (GET_MODE_INNER (mode) == inner_mode
|
&& GET_MODE_NUNITS (mode) > best_nunits
|
&& GET_MODE_NUNITS (mode) > best_nunits
|
&& op->handlers[mode].insn_code != CODE_FOR_nothing)
|
&& op->handlers[mode].insn_code != CODE_FOR_nothing)
|
best_mode = mode, best_nunits = GET_MODE_NUNITS (mode);
|
best_mode = mode, best_nunits = GET_MODE_NUNITS (mode);
|
|
|
if (best_mode == VOIDmode)
|
if (best_mode == VOIDmode)
|
return NULL_TREE;
|
return NULL_TREE;
|
else
|
else
|
return lang_hooks.types.type_for_mode (best_mode, 1);
|
return lang_hooks.types.type_for_mode (best_mode, 1);
|
}
|
}
|
|
|
/* Process one statement. If we identify a vector operation, expand it. */
|
/* Process one statement. If we identify a vector operation, expand it. */
|
|
|
static void
|
static void
|
expand_vector_operations_1 (block_stmt_iterator *bsi)
|
expand_vector_operations_1 (block_stmt_iterator *bsi)
|
{
|
{
|
tree stmt = bsi_stmt (*bsi);
|
tree stmt = bsi_stmt (*bsi);
|
tree *p_lhs, *p_rhs, lhs, rhs, type, compute_type;
|
tree *p_lhs, *p_rhs, lhs, rhs, type, compute_type;
|
enum tree_code code;
|
enum tree_code code;
|
enum machine_mode compute_mode;
|
enum machine_mode compute_mode;
|
optab op;
|
optab op;
|
|
|
switch (TREE_CODE (stmt))
|
switch (TREE_CODE (stmt))
|
{
|
{
|
case RETURN_EXPR:
|
case RETURN_EXPR:
|
stmt = TREE_OPERAND (stmt, 0);
|
stmt = TREE_OPERAND (stmt, 0);
|
if (!stmt || TREE_CODE (stmt) != MODIFY_EXPR)
|
if (!stmt || TREE_CODE (stmt) != MODIFY_EXPR)
|
return;
|
return;
|
|
|
/* FALLTHRU */
|
/* FALLTHRU */
|
|
|
case MODIFY_EXPR:
|
case MODIFY_EXPR:
|
p_lhs = &TREE_OPERAND (stmt, 0);
|
p_lhs = &TREE_OPERAND (stmt, 0);
|
p_rhs = &TREE_OPERAND (stmt, 1);
|
p_rhs = &TREE_OPERAND (stmt, 1);
|
lhs = *p_lhs;
|
lhs = *p_lhs;
|
rhs = *p_rhs;
|
rhs = *p_rhs;
|
break;
|
break;
|
|
|
default:
|
default:
|
return;
|
return;
|
}
|
}
|
|
|
type = TREE_TYPE (rhs);
|
type = TREE_TYPE (rhs);
|
if (TREE_CODE (type) != VECTOR_TYPE)
|
if (TREE_CODE (type) != VECTOR_TYPE)
|
return;
|
return;
|
|
|
code = TREE_CODE (rhs);
|
code = TREE_CODE (rhs);
|
if (TREE_CODE_CLASS (code) != tcc_unary
|
if (TREE_CODE_CLASS (code) != tcc_unary
|
&& TREE_CODE_CLASS (code) != tcc_binary)
|
&& TREE_CODE_CLASS (code) != tcc_binary)
|
return;
|
return;
|
|
|
if (code == NOP_EXPR || code == VIEW_CONVERT_EXPR)
|
if (code == NOP_EXPR || code == VIEW_CONVERT_EXPR)
|
return;
|
return;
|
|
|
gcc_assert (code != CONVERT_EXPR);
|
gcc_assert (code != CONVERT_EXPR);
|
op = optab_for_tree_code (code, type);
|
op = optab_for_tree_code (code, type);
|
|
|
/* For widening vector operations, the relevant type is of the arguments,
|
/* For widening vector operations, the relevant type is of the arguments,
|
not the widened result. */
|
not the widened result. */
|
if (code == WIDEN_SUM_EXPR)
|
if (code == WIDEN_SUM_EXPR)
|
type = TREE_TYPE (TREE_OPERAND (rhs, 0));
|
type = TREE_TYPE (TREE_OPERAND (rhs, 0));
|
|
|
/* Optabs will try converting a negation into a subtraction, so
|
/* Optabs will try converting a negation into a subtraction, so
|
look for it as well. TODO: negation of floating-point vectors
|
look for it as well. TODO: negation of floating-point vectors
|
might be turned into an exclusive OR toggling the sign bit. */
|
might be turned into an exclusive OR toggling the sign bit. */
|
if (op == NULL
|
if (op == NULL
|
&& code == NEGATE_EXPR
|
&& code == NEGATE_EXPR
|
&& INTEGRAL_TYPE_P (TREE_TYPE (type)))
|
&& INTEGRAL_TYPE_P (TREE_TYPE (type)))
|
op = optab_for_tree_code (MINUS_EXPR, type);
|
op = optab_for_tree_code (MINUS_EXPR, type);
|
|
|
/* For very wide vectors, try using a smaller vector mode. */
|
/* For very wide vectors, try using a smaller vector mode. */
|
compute_type = type;
|
compute_type = type;
|
if (TYPE_MODE (type) == BLKmode && op)
|
if (TYPE_MODE (type) == BLKmode && op)
|
{
|
{
|
tree vector_compute_type
|
tree vector_compute_type
|
= type_for_widest_vector_mode (TYPE_MODE (TREE_TYPE (type)), op);
|
= type_for_widest_vector_mode (TYPE_MODE (TREE_TYPE (type)), op);
|
if (vector_compute_type != NULL_TREE)
|
if (vector_compute_type != NULL_TREE)
|
compute_type = vector_compute_type;
|
compute_type = vector_compute_type;
|
}
|
}
|
|
|
/* If we are breaking a BLKmode vector into smaller pieces,
|
/* If we are breaking a BLKmode vector into smaller pieces,
|
type_for_widest_vector_mode has already looked into the optab,
|
type_for_widest_vector_mode has already looked into the optab,
|
so skip these checks. */
|
so skip these checks. */
|
if (compute_type == type)
|
if (compute_type == type)
|
{
|
{
|
compute_mode = TYPE_MODE (compute_type);
|
compute_mode = TYPE_MODE (compute_type);
|
if ((GET_MODE_CLASS (compute_mode) == MODE_VECTOR_INT
|
if ((GET_MODE_CLASS (compute_mode) == MODE_VECTOR_INT
|
|| GET_MODE_CLASS (compute_mode) == MODE_VECTOR_FLOAT)
|
|| GET_MODE_CLASS (compute_mode) == MODE_VECTOR_FLOAT)
|
&& op != NULL
|
&& op != NULL
|
&& op->handlers[compute_mode].insn_code != CODE_FOR_nothing)
|
&& op->handlers[compute_mode].insn_code != CODE_FOR_nothing)
|
return;
|
return;
|
else
|
else
|
/* There is no operation in hardware, so fall back to scalars. */
|
/* There is no operation in hardware, so fall back to scalars. */
|
compute_type = TREE_TYPE (type);
|
compute_type = TREE_TYPE (type);
|
}
|
}
|
|
|
gcc_assert (code != VEC_LSHIFT_EXPR && code != VEC_RSHIFT_EXPR);
|
gcc_assert (code != VEC_LSHIFT_EXPR && code != VEC_RSHIFT_EXPR);
|
rhs = expand_vector_operation (bsi, type, compute_type, rhs, code);
|
rhs = expand_vector_operation (bsi, type, compute_type, rhs, code);
|
if (lang_hooks.types_compatible_p (TREE_TYPE (lhs), TREE_TYPE (rhs)))
|
if (lang_hooks.types_compatible_p (TREE_TYPE (lhs), TREE_TYPE (rhs)))
|
*p_rhs = rhs;
|
*p_rhs = rhs;
|
else
|
else
|
*p_rhs = gimplify_build1 (bsi, VIEW_CONVERT_EXPR, TREE_TYPE (lhs), rhs);
|
*p_rhs = gimplify_build1 (bsi, VIEW_CONVERT_EXPR, TREE_TYPE (lhs), rhs);
|
|
|
mark_stmt_modified (bsi_stmt (*bsi));
|
mark_stmt_modified (bsi_stmt (*bsi));
|
}
|
}
|
|
|
/* Use this to lower vector operations introduced by the vectorizer,
|
/* Use this to lower vector operations introduced by the vectorizer,
|
if it may need the bit-twiddling tricks implemented in this file. */
|
if it may need the bit-twiddling tricks implemented in this file. */
|
|
|
static bool
|
static bool
|
gate_expand_vector_operations (void)
|
gate_expand_vector_operations (void)
|
{
|
{
|
return flag_tree_vectorize != 0;
|
return flag_tree_vectorize != 0;
|
}
|
}
|
|
|
static unsigned int
|
static unsigned int
|
expand_vector_operations (void)
|
expand_vector_operations (void)
|
{
|
{
|
block_stmt_iterator bsi;
|
block_stmt_iterator bsi;
|
basic_block bb;
|
basic_block bb;
|
|
|
FOR_EACH_BB (bb)
|
FOR_EACH_BB (bb)
|
{
|
{
|
for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
|
for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
|
{
|
{
|
expand_vector_operations_1 (&bsi);
|
expand_vector_operations_1 (&bsi);
|
update_stmt_if_modified (bsi_stmt (bsi));
|
update_stmt_if_modified (bsi_stmt (bsi));
|
}
|
}
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
struct tree_opt_pass pass_lower_vector =
|
struct tree_opt_pass pass_lower_vector =
|
{
|
{
|
"veclower", /* name */
|
"veclower", /* name */
|
0, /* gate */
|
0, /* gate */
|
expand_vector_operations, /* execute */
|
expand_vector_operations, /* execute */
|
NULL, /* sub */
|
NULL, /* sub */
|
NULL, /* next */
|
NULL, /* next */
|
0, /* static_pass_number */
|
0, /* static_pass_number */
|
0, /* tv_id */
|
0, /* tv_id */
|
PROP_cfg, /* properties_required */
|
PROP_cfg, /* properties_required */
|
0, /* properties_provided */
|
0, /* properties_provided */
|
0, /* properties_destroyed */
|
0, /* properties_destroyed */
|
0, /* todo_flags_start */
|
0, /* todo_flags_start */
|
TODO_dump_func | TODO_ggc_collect
|
TODO_dump_func | TODO_ggc_collect
|
| TODO_verify_stmts, /* todo_flags_finish */
|
| TODO_verify_stmts, /* todo_flags_finish */
|
0 /* letter */
|
0 /* letter */
|
};
|
};
|
|
|
struct tree_opt_pass pass_lower_vector_ssa =
|
struct tree_opt_pass pass_lower_vector_ssa =
|
{
|
{
|
"veclower2", /* name */
|
"veclower2", /* name */
|
gate_expand_vector_operations, /* gate */
|
gate_expand_vector_operations, /* gate */
|
expand_vector_operations, /* execute */
|
expand_vector_operations, /* execute */
|
NULL, /* sub */
|
NULL, /* sub */
|
NULL, /* next */
|
NULL, /* next */
|
0, /* static_pass_number */
|
0, /* static_pass_number */
|
0, /* tv_id */
|
0, /* tv_id */
|
PROP_cfg, /* properties_required */
|
PROP_cfg, /* properties_required */
|
0, /* properties_provided */
|
0, /* properties_provided */
|
0, /* properties_destroyed */
|
0, /* properties_destroyed */
|
0, /* todo_flags_start */
|
0, /* todo_flags_start */
|
TODO_dump_func | TODO_update_ssa /* todo_flags_finish */
|
TODO_dump_func | TODO_update_ssa /* todo_flags_finish */
|
| TODO_verify_ssa
|
| TODO_verify_ssa
|
| TODO_verify_stmts | TODO_verify_flow,
|
| TODO_verify_stmts | TODO_verify_flow,
|
0 /* letter */
|
0 /* letter */
|
};
|
};
|
|
|
#include "gt-tree-vect-generic.h"
|
#include "gt-tree-vect-generic.h"
|
|
|
