freebsd-dev/contrib/gcc/optabs.h

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/* Definitions for code generation pass of GNU compiler.
Copyright (C) 2001 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 2, 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 COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef GCC_OPTABS_H
#define GCC_OPTABS_H
#include "insn-codes.h"
/* Optabs are tables saying how to generate insn bodies
for various machine modes and numbers of operands.
Each optab applies to one operation.
For example, add_optab applies to addition.
The insn_code slot is the enum insn_code that says how to
generate an insn for this operation on a particular machine mode.
It is CODE_FOR_nothing if there is no such insn on the target machine.
The `lib_call' slot is the name of the library function that
can be used to perform the operation.
A few optabs, such as move_optab and cmp_optab, are used
by special code. */
typedef struct optab
{
enum rtx_code code;
struct {
enum insn_code insn_code;
rtx libfunc;
} handlers [NUM_MACHINE_MODES];
} * optab;
/* Given an enum insn_code, access the function to construct
the body of that kind of insn. */
#define GEN_FCN(CODE) (*insn_data[(int) (CODE)].genfun)
/* Enumeration of valid indexes into optab_table. */
enum optab_index
{
OTI_add,
OTI_addv,
OTI_sub,
OTI_subv,
/* Signed and fp multiply */
OTI_smul,
OTI_smulv,
/* Signed multiply, return high word */
OTI_smul_highpart,
OTI_umul_highpart,
/* Signed multiply with result one machine mode wider than args */
OTI_smul_widen,
OTI_umul_widen,
/* Signed divide */
OTI_sdiv,
OTI_sdivv,
/* Signed divide-and-remainder in one */
OTI_sdivmod,
OTI_udiv,
OTI_udivmod,
/* Signed remainder */
OTI_smod,
OTI_umod,
/* Convert float to integer in float fmt */
OTI_ftrunc,
/* Logical and */
OTI_and,
/* Logical or */
OTI_ior,
/* Logical xor */
OTI_xor,
/* Arithmetic shift left */
OTI_ashl,
/* Logical shift right */
OTI_lshr,
/* Arithmetic shift right */
OTI_ashr,
/* Rotate left */
OTI_rotl,
/* Rotate right */
OTI_rotr,
/* Signed and floating-point minimum value */
OTI_smin,
/* Signed and floating-point maximum value */
OTI_smax,
/* Unsigned minimum value */
OTI_umin,
/* Unsigned maximum value */
OTI_umax,
/* Move instruction. */
OTI_mov,
/* Move, preserving high part of register. */
OTI_movstrict,
/* Unary operations */
/* Negation */
OTI_neg,
OTI_negv,
/* Abs value */
OTI_abs,
OTI_absv,
/* Bitwise not */
OTI_one_cmpl,
/* Find first bit set */
OTI_ffs,
/* Square root */
OTI_sqrt,
/* Sine */
OTI_sin,
/* Cosine */
OTI_cos,
/* Compare insn; two operands. */
OTI_cmp,
/* Used only for libcalls for unsigned comparisons. */
OTI_ucmp,
/* tst insn; compare one operand against 0 */
OTI_tst,
/* String length */
OTI_strlen,
/* Combined compare & jump/store flags/move operations. */
OTI_cbranch,
OTI_cmov,
OTI_cstore,
/* Push instruction. */
OTI_push,
OTI_MAX
};
extern optab optab_table[OTI_MAX];
#define add_optab (optab_table[OTI_add])
#define sub_optab (optab_table[OTI_sub])
#define smul_optab (optab_table[OTI_smul])
#define addv_optab (optab_table[OTI_addv])
#define subv_optab (optab_table[OTI_subv])
#define smul_highpart_optab (optab_table[OTI_smul_highpart])
#define umul_highpart_optab (optab_table[OTI_umul_highpart])
#define smul_widen_optab (optab_table[OTI_smul_widen])
#define umul_widen_optab (optab_table[OTI_umul_widen])
#define sdiv_optab (optab_table[OTI_sdiv])
#define smulv_optab (optab_table[OTI_smulv])
#define sdivv_optab (optab_table[OTI_sdivv])
#define sdivmod_optab (optab_table[OTI_sdivmod])
#define udiv_optab (optab_table[OTI_udiv])
#define udivmod_optab (optab_table[OTI_udivmod])
#define smod_optab (optab_table[OTI_smod])
#define umod_optab (optab_table[OTI_umod])
#define ftrunc_optab (optab_table[OTI_ftrunc])
#define and_optab (optab_table[OTI_and])
#define ior_optab (optab_table[OTI_ior])
#define xor_optab (optab_table[OTI_xor])
#define ashl_optab (optab_table[OTI_ashl])
#define lshr_optab (optab_table[OTI_lshr])
#define ashr_optab (optab_table[OTI_ashr])
#define rotl_optab (optab_table[OTI_rotl])
#define rotr_optab (optab_table[OTI_rotr])
#define smin_optab (optab_table[OTI_smin])
#define smax_optab (optab_table[OTI_smax])
#define umin_optab (optab_table[OTI_umin])
#define umax_optab (optab_table[OTI_umax])
#define mov_optab (optab_table[OTI_mov])
#define movstrict_optab (optab_table[OTI_movstrict])
#define neg_optab (optab_table[OTI_neg])
#define negv_optab (optab_table[OTI_negv])
#define abs_optab (optab_table[OTI_abs])
#define absv_optab (optab_table[OTI_absv])
#define one_cmpl_optab (optab_table[OTI_one_cmpl])
#define ffs_optab (optab_table[OTI_ffs])
#define sqrt_optab (optab_table[OTI_sqrt])
#define sin_optab (optab_table[OTI_sin])
#define cos_optab (optab_table[OTI_cos])
#define cmp_optab (optab_table[OTI_cmp])
#define ucmp_optab (optab_table[OTI_ucmp])
#define tst_optab (optab_table[OTI_tst])
#define strlen_optab (optab_table[OTI_strlen])
#define cbranch_optab (optab_table[OTI_cbranch])
#define cmov_optab (optab_table[OTI_cmov])
#define cstore_optab (optab_table[OTI_cstore])
#define push_optab (optab_table[OTI_push])
/* Tables of patterns for extending one integer mode to another. */
extern enum insn_code extendtab[MAX_MACHINE_MODE][MAX_MACHINE_MODE][2];
/* Tables of patterns for converting between fixed and floating point. */
extern enum insn_code fixtab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
extern enum insn_code fixtrunctab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
extern enum insn_code floattab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
/* These arrays record the insn_code of insns that may be needed to
perform input and output reloads of special objects. They provide a
place to pass a scratch register. */
extern enum insn_code reload_in_optab[NUM_MACHINE_MODES];
extern enum insn_code reload_out_optab[NUM_MACHINE_MODES];
/* Contains the optab used for each rtx code. */
extern optab code_to_optab[NUM_RTX_CODE + 1];
typedef rtx (*rtxfun) PARAMS ((rtx));
/* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
gives the gen_function to make a branch to test that condition. */
extern rtxfun bcc_gen_fctn[NUM_RTX_CODE];
/* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
gives the insn code to make a store-condition insn
to test that condition. */
extern enum insn_code setcc_gen_code[NUM_RTX_CODE];
#ifdef HAVE_conditional_move
/* Indexed by the machine mode, gives the insn code to make a conditional
move insn. */
extern enum insn_code movcc_gen_code[NUM_MACHINE_MODES];
#endif
/* This array records the insn_code of insns to perform block moves. */
extern enum insn_code movstr_optab[NUM_MACHINE_MODES];
/* This array records the insn_code of insns to perform block clears. */
extern enum insn_code clrstr_optab[NUM_MACHINE_MODES];
/* Define functions given in optabs.c. */
/* Expand a binary operation given optab and rtx operands. */
extern rtx expand_binop PARAMS ((enum 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 PARAMS ((enum machine_mode, optab, optab, rtx,
rtx, rtx, int, enum optab_methods));
/* Generate code to perform an operation on two operands with two results. */
extern int expand_twoval_binop PARAMS ((optab, rtx, rtx, rtx, rtx, int));
/* Expand a unary arithmetic operation given optab rtx operand. */
extern rtx expand_unop PARAMS ((enum machine_mode, optab, rtx, rtx, int));
/* Expand the absolute value operation. */
extern rtx expand_abs PARAMS ((enum machine_mode, rtx, rtx, int, int));
/* Expand the complex absolute value operation. */
extern rtx expand_complex_abs PARAMS ((enum machine_mode, rtx, rtx, int));
/* Generate an instruction with a given INSN_CODE with an output and
an input. */
extern void emit_unop_insn PARAMS ((int, rtx, rtx, enum rtx_code));
/* Emit code to perform a series of operations on a multi-word quantity, one
word at a time. */
extern rtx emit_no_conflict_block PARAMS ((rtx, rtx, rtx, rtx, rtx));
/* Emit one rtl instruction to store zero in specified rtx. */
extern void emit_clr_insn PARAMS ((rtx));
/* Emit one rtl insn to store 1 in specified rtx assuming it contains 0. */
extern void emit_0_to_1_insn PARAMS ((rtx));
/* Emit one rtl insn to compare two rtx's. */
extern void emit_cmp_insn PARAMS ((rtx, rtx, enum rtx_code, rtx,
enum machine_mode, int));
/* 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 PARAMS ((enum rtx_code, enum machine_mode,
enum can_compare_purpose));
extern rtx prepare_operand PARAMS ((int, rtx, int, enum machine_mode,
enum machine_mode, int));
/* Return the INSN_CODE to use for an extend operation. */
extern enum insn_code can_extend_p PARAMS ((enum machine_mode,
enum machine_mode, int));
/* 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 gen_extend_insn PARAMS ((rtx, rtx, enum machine_mode,
enum machine_mode, int));
/* Initialize the tables that control conversion between fixed and
floating values. */
extern void init_fixtab PARAMS ((void));
extern void init_floattab PARAMS ((void));
/* Generate code for a FLOAT_EXPR. */
extern void expand_float PARAMS ((rtx, rtx, int));
/* Generate code for a FIX_EXPR. */
extern void expand_fix PARAMS ((rtx, rtx, int));
#endif /* GCC_OPTABS_H */