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/* Functions and structures shared between arm and aarch64.
Copyright (C) 1991-2014 Free Software Foundation, Inc.
Contributed by ARM Ltd.
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_AARCH_COMMON_PROTOS_H
#define GCC_AARCH_COMMON_PROTOS_H
extern int aarch_crypto_can_dual_issue (rtx_insn *, rtx_insn *);
extern bool aarch_rev16_p (rtx);
extern bool aarch_rev16_shleft_mask_imm_p (rtx, machine_mode);
extern bool aarch_rev16_shright_mask_imm_p (rtx, machine_mode);
extern int arm_early_load_addr_dep (rtx, rtx);
extern int arm_early_store_addr_dep (rtx, rtx);
extern int arm_mac_accumulator_is_mul_result (rtx, rtx);
extern int arm_mac_accumulator_is_result (rtx, rtx);
extern int arm_no_early_alu_shift_dep (rtx, rtx);
extern int arm_no_early_alu_shift_value_dep (rtx, rtx);
extern int arm_no_early_mul_dep (rtx, rtx);
extern int arm_no_early_store_addr_dep (rtx, rtx);
extern bool arm_rtx_shift_left_p (rtx);
/* RTX cost table definitions. These are used when tuning for speed rather
than for size and should reflect the _additional_ cost over the cost
of the fastest instruction in the machine, which is COSTS_N_INSNS (1).
Therefore it's okay for some costs to be 0.
Costs may not have a negative value. */
struct alu_cost_table
{
const int arith; /* ADD/SUB. */
const int logical; /* AND/ORR/EOR/BIC, etc. */
const int shift; /* Simple shift. */
const int shift_reg; /* Simple shift by reg. */
const int arith_shift; /* Additional when arith also shifts... */
const int arith_shift_reg; /* ... and when the shift is by a reg. */
const int log_shift; /* Additional when logic also shifts... */
const int log_shift_reg; /* ... and when the shift is by a reg. */
const int extend; /* Zero/sign extension. */
const int extend_arith; /* Extend and arith. */
const int bfi; /* Bit-field insert. */
const int bfx; /* Bit-field extraction. */
const int clz; /* Count Leading Zeros. */
const int rev; /* Reverse bits/bytes. */
const int non_exec; /* Extra cost when not executing insn. */
const bool non_exec_costs_exec; /* True if non-execution must add the exec
cost. */
};
struct mult_cost_table
{
const int simple;
const int flag_setting; /* Additional cost if multiply sets flags. */
const int extend;
const int add;
const int extend_add;
const int idiv;
};
/* Calculations of LDM costs are complex. We assume an initial cost
(ldm_1st) which will load the number of registers mentioned in
ldm_regs_per_insn_1st registers; then each additional
ldm_regs_per_insn_subsequent registers cost one more insn.
Similarly for STM operations.
Therefore the ldm_regs_per_insn_1st/stm_regs_per_insn_1st and
ldm_regs_per_insn_subsequent/stm_regs_per_insn_subsequent fields indicate
the number of registers loaded/stored and are expressed by a simple integer
and not by a COSTS_N_INSNS (N) expression.
*/
struct mem_cost_table
{
const int load;
const int load_sign_extend; /* Additional to load cost. */
const int ldrd; /* Cost of LDRD. */
const int ldm_1st;
const int ldm_regs_per_insn_1st;
const int ldm_regs_per_insn_subsequent;
const int loadf; /* SFmode. */
const int loadd; /* DFmode. */
const int load_unaligned; /* Extra for unaligned loads. */
const int store;
const int strd;
const int stm_1st;
const int stm_regs_per_insn_1st;
const int stm_regs_per_insn_subsequent;
const int storef; /* SFmode. */
const int stored; /* DFmode. */
const int store_unaligned; /* Extra for unaligned stores. */
};
struct fp_cost_table
{
const int div;
const int mult;
const int mult_addsub; /* Non-fused. */
const int fma; /* Fused. */
const int addsub;
const int fpconst; /* Immediate. */
const int neg; /* NEG and ABS. */
const int compare;
const int widen; /* Widen to this size. */
const int narrow; /* Narrow from this size. */
const int toint;
const int fromint;
const int roundint; /* V8 round to integral, remains FP format. */
};
struct vector_cost_table
{
const int alu;
};
struct cpu_cost_table
{
const struct alu_cost_table alu;
const struct mult_cost_table mult[2]; /* SImode and DImode. */
const struct mem_cost_table ldst;
const struct fp_cost_table fp[2]; /* SFmode and DFmode. */
const struct vector_cost_table vect;
};
#endif /* GCC_AARCH_COMMON_PROTOS_H */
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