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/* Definitions for code generation pass of GNU compiler.
Copyright (C) 2001-2017 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option)
any later version.
GCC 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.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_OPTABS_H
#define GCC_OPTABS_H
#include "optabs-query.h"
#include "optabs-libfuncs.h"
/* Generate code for a widening multiply. */
extern rtx expand_widening_mult (machine_mode, rtx, rtx, rtx, int, optab);
/* Describes the type of an expand_operand. Each value is associated
with a create_*_operand function; see the comments above those
functions for details. */
enum expand_operand_type {
EXPAND_FIXED,
EXPAND_OUTPUT,
EXPAND_INPUT,
EXPAND_CONVERT_TO,
EXPAND_CONVERT_FROM,
EXPAND_ADDRESS,
EXPAND_INTEGER
};
/* Information about an operand for instruction expansion. */
struct expand_operand {
/* The type of operand. */
ENUM_BITFIELD (expand_operand_type) type : 8;
/* True if any conversion should treat VALUE as being unsigned
rather than signed. Only meaningful for certain types. */
unsigned int unsigned_p : 1;
/* Unused; available for future use. */
unsigned int unused : 7;
/* The mode passed to the convert_*_operand function. It has a
type-dependent meaning. */
ENUM_BITFIELD (machine_mode) mode : 16;
/* The value of the operand. */
rtx value;
};
/* Initialize OP with the given fields. Initialise the other fields
to their default values. */
static inline void
create_expand_operand (struct expand_operand *op,
enum expand_operand_type type,
rtx value, machine_mode mode,
bool unsigned_p)
{
op->type = type;
op->unsigned_p = unsigned_p;
op->unused = 0;
op->mode = mode;
op->value = value;
}
/* Make OP describe an operand that must use rtx X, even if X is volatile. */
static inline void
create_fixed_operand (struct expand_operand *op, rtx x)
{
create_expand_operand (op, EXPAND_FIXED, x, VOIDmode, false);
}
/* Make OP describe an output operand that must have mode MODE.
X, if nonnull, is a suggestion for where the output should be stored.
It is OK for VALUE to be inconsistent with MODE, although it will just
be ignored in that case. */
static inline void
create_output_operand (struct expand_operand *op, rtx x,
machine_mode mode)
{
create_expand_operand (op, EXPAND_OUTPUT, x, mode, false);
}
/* Make OP describe an input operand that must have mode MODE and
value VALUE; MODE cannot be VOIDmode. The backend may request that
VALUE be copied into a different kind of rtx before being passed
as an operand. */
static inline void
create_input_operand (struct expand_operand *op, rtx value,
machine_mode mode)
{
create_expand_operand (op, EXPAND_INPUT, value, mode, false);
}
/* Like create_input_operand, except that VALUE must first be converted
to mode MODE. UNSIGNED_P says whether VALUE is unsigned. */
static inline void
create_convert_operand_to (struct expand_operand *op, rtx value,
machine_mode mode, bool unsigned_p)
{
create_expand_operand (op, EXPAND_CONVERT_TO, value, mode, unsigned_p);
}
/* Make OP describe an input operand that should have the same value
as VALUE, after any mode conversion that the backend might request.
If VALUE is a CONST_INT, it should be treated as having mode MODE.
UNSIGNED_P says whether VALUE is unsigned. */
static inline void
create_convert_operand_from (struct expand_operand *op, rtx value,
machine_mode mode, bool unsigned_p)
{
create_expand_operand (op, EXPAND_CONVERT_FROM, value, mode, unsigned_p);
}
/* Make OP describe an input Pmode address operand. VALUE is the value
of the address, but it may need to be converted to Pmode first. */
static inline void
create_address_operand (struct expand_operand *op, rtx value)
{
create_expand_operand (op, EXPAND_ADDRESS, value, Pmode, false);
}
/* Make OP describe an input operand that has value INTVAL and that has
no inherent mode. This function should only be used for operands that
are always expand-time constants. The backend may request that INTVAL
be copied into a different kind of rtx, but it must specify the mode
of that rtx if so. */
static inline void
create_integer_operand (struct expand_operand *op, HOST_WIDE_INT intval)
{
create_expand_operand (op, EXPAND_INTEGER, GEN_INT (intval), VOIDmode, false);
}
/* Passed to expand_simple_binop and expand_binop to say which options
to try to use if the requested operation can't be open-coded on the
requisite mode. Either OPTAB_LIB or OPTAB_LIB_WIDEN says try using
a library call. Either OPTAB_WIDEN or OPTAB_LIB_WIDEN says try
using a wider mode. OPTAB_MUST_WIDEN says try widening and don't
try anything else. */
enum optab_methods
{
OPTAB_DIRECT,
OPTAB_LIB,
OPTAB_WIDEN,
OPTAB_LIB_WIDEN,
OPTAB_MUST_WIDEN
};
extern rtx expand_widen_pattern_expr (struct separate_ops *, rtx , rtx , rtx,
rtx, int);
extern rtx expand_ternary_op (machine_mode mode, optab ternary_optab,
rtx op0, rtx op1, rtx op2, rtx target,
int unsignedp);
extern rtx simplify_expand_binop (machine_mode mode, optab binoptab,
rtx op0, rtx op1, rtx target, int unsignedp,
enum optab_methods methods);
extern bool force_expand_binop (machine_mode, optab, rtx, rtx, rtx, int,
enum optab_methods);
/* Generate code for a simple binary or unary operation. "Simple" in
this case means "can be unambiguously described by a (mode, code)
pair and mapped to a single optab." */
extern rtx expand_simple_binop (machine_mode, enum rtx_code, rtx,
rtx, rtx, int, enum optab_methods);
/* Expand a binary operation given optab and rtx operands. */
extern rtx expand_binop (machine_mode, optab, rtx, rtx, rtx, int,
enum optab_methods);
/* Expand a binary operation with both signed and unsigned forms. */
extern rtx sign_expand_binop (machine_mode, optab, optab, rtx, rtx,
rtx, int, enum optab_methods);
/* Generate code to perform an operation on one operand with two results. */
extern int expand_twoval_unop (optab, rtx, rtx, rtx, int);
/* Generate code to perform an operation on two operands with two results. */
extern int expand_twoval_binop (optab, rtx, rtx, rtx, rtx, int);
/* Generate code to perform an operation on two operands with two
results, using a library function. */
extern bool expand_twoval_binop_libfunc (optab, rtx, rtx, rtx, rtx,
enum rtx_code);
extern rtx expand_simple_unop (machine_mode, enum rtx_code, rtx, rtx,
int);
/* Expand a unary arithmetic operation given optab rtx operand. */
extern rtx expand_unop (machine_mode, optab, rtx, rtx, int);
/* Expand the absolute value operation. */
extern rtx expand_abs_nojump (machine_mode, rtx, rtx, int);
extern rtx expand_abs (machine_mode, rtx, rtx, int, int);
/* Expand the one's complement absolute value operation. */
extern rtx expand_one_cmpl_abs_nojump (machine_mode, rtx, rtx);
/* Expand the copysign operation. */
extern rtx expand_copysign (rtx, rtx, rtx);
/* Generate an instruction with a given INSN_CODE with an output and
an input. */
extern bool maybe_emit_unop_insn (enum insn_code, rtx, rtx, enum rtx_code);
extern void emit_unop_insn (enum insn_code, rtx, rtx, enum rtx_code);
/* Emit code to make a call to a constant function or a library call. */
extern void emit_libcall_block (rtx_insn *, rtx, rtx, rtx);
/* The various uses that a comparison can have; used by can_compare_p:
jumps, conditional moves, store flag operations. */
enum can_compare_purpose
{
ccp_jump,
ccp_cmov,
ccp_store_flag
};
/* Nonzero if a compare of mode MODE can be done straightforwardly
(without splitting it into pieces). */
extern int can_compare_p (enum rtx_code, machine_mode,
enum can_compare_purpose);
extern rtx prepare_operand (enum insn_code, rtx, int, machine_mode,
machine_mode, int);
/* Emit a pair of rtl insns to compare two rtx's and to jump
to a label if the comparison is true. */
extern void emit_cmp_and_jump_insns (rtx, rtx, enum rtx_code, rtx,
machine_mode, int, rtx, int prob=-1);
/* Generate code to indirectly jump to a location given in the rtx LOC. */
extern void emit_indirect_jump (rtx);
#include "insn-config.h"
#ifndef GCC_INSN_CONFIG_H
#error "insn-config.h must be included before optabs.h"
#endif
/* Emit a conditional move operation. */
rtx emit_conditional_move (rtx, enum rtx_code, rtx, rtx, machine_mode,
rtx, rtx, machine_mode, int);
/* Emit a conditional negate or bitwise complement operation. */
rtx emit_conditional_neg_or_complement (rtx, rtx_code, machine_mode, rtx,
rtx, rtx);
rtx emit_conditional_add (rtx, enum rtx_code, rtx, rtx, machine_mode,
rtx, rtx, machine_mode, int);
/* Create but don't emit one rtl instruction to perform certain operations.
Modes must match; operands must meet the operation's predicates.
Likewise for subtraction and for just copying. */
extern rtx_insn *gen_add2_insn (rtx, rtx);
extern rtx_insn *gen_add3_insn (rtx, rtx, rtx);
extern int have_add2_insn (rtx, rtx);
extern rtx_insn *gen_addptr3_insn (rtx, rtx, rtx);
extern int have_addptr3_insn (rtx, rtx, rtx);
extern rtx_insn *gen_sub2_insn (rtx, rtx);
extern rtx_insn *gen_sub3_insn (rtx, rtx, rtx);
extern int have_sub2_insn (rtx, rtx);
/* Generate the body of an insn to extend Y (with mode MFROM)
into X (with mode MTO). Do zero-extension if UNSIGNEDP is nonzero. */
extern rtx_insn *gen_extend_insn (rtx, rtx, machine_mode, machine_mode, int);
/* Generate code for a FLOAT_EXPR. */
extern void expand_float (rtx, rtx, int);
/* Generate code for a FIX_EXPR. */
extern void expand_fix (rtx, rtx, int);
/* Generate code for a FIXED_CONVERT_EXPR. */
extern void expand_fixed_convert (rtx, rtx, int, int);
/* Generate code for float to integral conversion. */
extern bool expand_sfix_optab (rtx, rtx, convert_optab);
/* Report whether the machine description contains an insn which can
perform the operation described by CODE and MODE. */
extern int have_insn_for (enum rtx_code, machine_mode);
/* Generate a conditional trap instruction. */
extern rtx_insn *gen_cond_trap (enum rtx_code, rtx, rtx, rtx);
/* Generate code for VEC_PERM_EXPR. */
extern rtx expand_vec_perm (machine_mode, rtx, rtx, rtx, rtx);
/* Generate code for vector comparison. */
extern rtx expand_vec_cmp_expr (tree, tree, rtx);
/* Generate code for VEC_COND_EXPR. */
extern rtx expand_vec_cond_expr (tree, tree, tree, tree, rtx);
/* Generate code for MULT_HIGHPART_EXPR. */
extern rtx expand_mult_highpart (machine_mode, rtx, rtx, rtx, bool);
extern rtx expand_sync_lock_test_and_set (rtx, rtx, rtx);
extern rtx expand_atomic_test_and_set (rtx, rtx, enum memmodel);
extern rtx expand_atomic_exchange (rtx, rtx, rtx, enum memmodel);
extern bool expand_atomic_compare_and_swap (rtx *, rtx *, rtx, rtx, rtx, bool,
enum memmodel, enum memmodel);
/* Generate memory barriers. */
extern void expand_mem_thread_fence (enum memmodel);
extern void expand_mem_signal_fence (enum memmodel);
rtx expand_atomic_load (rtx, rtx, enum memmodel);
rtx expand_atomic_store (rtx, rtx, enum memmodel, bool);
rtx expand_atomic_fetch_op (rtx, rtx, rtx, enum rtx_code, enum memmodel,
bool);
extern bool insn_operand_matches (enum insn_code icode, unsigned int opno,
rtx operand);
extern bool valid_multiword_target_p (rtx);
extern void create_convert_operand_from_type (struct expand_operand *op,
rtx value, tree type);
extern bool maybe_legitimize_operands (enum insn_code icode,
unsigned int opno, unsigned int nops,
struct expand_operand *ops);
extern rtx_insn *maybe_gen_insn (enum insn_code icode, unsigned int nops,
struct expand_operand *ops);
extern bool maybe_expand_insn (enum insn_code icode, unsigned int nops,
struct expand_operand *ops);
extern bool maybe_expand_jump_insn (enum insn_code icode, unsigned int nops,
struct expand_operand *ops);
extern void expand_insn (enum insn_code icode, unsigned int nops,
struct expand_operand *ops);
extern void expand_jump_insn (enum insn_code icode, unsigned int nops,
struct expand_operand *ops);
extern enum rtx_code get_rtx_code (enum tree_code tcode, bool unsignedp);
#endif /* GCC_OPTABS_H */