| /* Target-dependent costs for expmed.c. |
| Copyright (C) 1987-2017 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 EXPMED_H |
| #define EXPMED_H 1 |
| |
| #include "insn-codes.h" |
| |
| enum alg_code { |
| alg_unknown, |
| alg_zero, |
| alg_m, alg_shift, |
| alg_add_t_m2, |
| alg_sub_t_m2, |
| alg_add_factor, |
| alg_sub_factor, |
| alg_add_t2_m, |
| alg_sub_t2_m, |
| alg_impossible |
| }; |
| |
| /* Indicates the type of fixup needed after a constant multiplication. |
| BASIC_VARIANT means no fixup is needed, NEGATE_VARIANT means that |
| the result should be negated, and ADD_VARIANT means that the |
| multiplicand should be added to the result. */ |
| enum mult_variant {basic_variant, negate_variant, add_variant}; |
| |
| bool choose_mult_variant (machine_mode, HOST_WIDE_INT, |
| struct algorithm *, enum mult_variant *, int); |
| |
| /* This structure holds the "cost" of a multiply sequence. The |
| "cost" field holds the total rtx_cost of every operator in the |
| synthetic multiplication sequence, hence cost(a op b) is defined |
| as rtx_cost(op) + cost(a) + cost(b), where cost(leaf) is zero. |
| The "latency" field holds the minimum possible latency of the |
| synthetic multiply, on a hypothetical infinitely parallel CPU. |
| This is the critical path, or the maximum height, of the expression |
| tree which is the sum of rtx_costs on the most expensive path from |
| any leaf to the root. Hence latency(a op b) is defined as zero for |
| leaves and rtx_cost(op) + max(latency(a), latency(b)) otherwise. */ |
| |
| struct mult_cost { |
| short cost; /* Total rtx_cost of the multiplication sequence. */ |
| short latency; /* The latency of the multiplication sequence. */ |
| }; |
| |
| /* This macro is used to compare a pointer to a mult_cost against an |
| single integer "rtx_cost" value. This is equivalent to the macro |
| CHEAPER_MULT_COST(X,Z) where Z = {Y,Y}. */ |
| #define MULT_COST_LESS(X,Y) ((X)->cost < (Y) \ |
| || ((X)->cost == (Y) && (X)->latency < (Y))) |
| |
| /* This macro is used to compare two pointers to mult_costs against |
| each other. The macro returns true if X is cheaper than Y. |
| Currently, the cheaper of two mult_costs is the one with the |
| lower "cost". If "cost"s are tied, the lower latency is cheaper. */ |
| #define CHEAPER_MULT_COST(X,Y) ((X)->cost < (Y)->cost \ |
| || ((X)->cost == (Y)->cost \ |
| && (X)->latency < (Y)->latency)) |
| |
| /* This structure records a sequence of operations. |
| `ops' is the number of operations recorded. |
| `cost' is their total cost. |
| The operations are stored in `op' and the corresponding |
| logarithms of the integer coefficients in `log'. |
| |
| These are the operations: |
| alg_zero total := 0; |
| alg_m total := multiplicand; |
| alg_shift total := total * coeff |
| alg_add_t_m2 total := total + multiplicand * coeff; |
| alg_sub_t_m2 total := total - multiplicand * coeff; |
| alg_add_factor total := total * coeff + total; |
| alg_sub_factor total := total * coeff - total; |
| alg_add_t2_m total := total * coeff + multiplicand; |
| alg_sub_t2_m total := total * coeff - multiplicand; |
| |
| The first operand must be either alg_zero or alg_m. */ |
| |
| struct algorithm |
| { |
| struct mult_cost cost; |
| short ops; |
| /* The size of the OP and LOG fields are not directly related to the |
| word size, but the worst-case algorithms will be if we have few |
| consecutive ones or zeros, i.e., a multiplicand like 10101010101... |
| In that case we will generate shift-by-2, add, shift-by-2, add,..., |
| in total wordsize operations. */ |
| enum alg_code op[MAX_BITS_PER_WORD]; |
| char log[MAX_BITS_PER_WORD]; |
| }; |
| |
| /* The entry for our multiplication cache/hash table. */ |
| struct alg_hash_entry { |
| /* The number we are multiplying by. */ |
| unsigned HOST_WIDE_INT t; |
| |
| /* The mode in which we are multiplying something by T. */ |
| machine_mode mode; |
| |
| /* The best multiplication algorithm for t. */ |
| enum alg_code alg; |
| |
| /* The cost of multiplication if ALG_CODE is not alg_impossible. |
| Otherwise, the cost within which multiplication by T is |
| impossible. */ |
| struct mult_cost cost; |
| |
| /* Optimized for speed? */ |
| bool speed; |
| }; |
| |
| /* The number of cache/hash entries. */ |
| #if HOST_BITS_PER_WIDE_INT == 64 |
| #define NUM_ALG_HASH_ENTRIES 1031 |
| #else |
| #define NUM_ALG_HASH_ENTRIES 307 |
| #endif |
| |
| #define NUM_MODE_INT \ |
| (MAX_MODE_INT - MIN_MODE_INT + 1) |
| #define NUM_MODE_PARTIAL_INT \ |
| (MIN_MODE_PARTIAL_INT == E_VOIDmode ? 0 \ |
| : MAX_MODE_PARTIAL_INT - MIN_MODE_PARTIAL_INT + 1) |
| #define NUM_MODE_VECTOR_INT \ |
| (MIN_MODE_VECTOR_INT == E_VOIDmode ? 0 \ |
| : MAX_MODE_VECTOR_INT - MIN_MODE_VECTOR_INT + 1) |
| |
| #define NUM_MODE_IP_INT (NUM_MODE_INT + NUM_MODE_PARTIAL_INT) |
| #define NUM_MODE_IPV_INT (NUM_MODE_IP_INT + NUM_MODE_VECTOR_INT) |
| |
| struct expmed_op_cheap { |
| bool cheap[2][NUM_MODE_IPV_INT]; |
| }; |
| |
| struct expmed_op_costs { |
| int cost[2][NUM_MODE_IPV_INT]; |
| }; |
| |
| /* Target-dependent globals. */ |
| struct target_expmed { |
| /* Each entry of ALG_HASH caches alg_code for some integer. This is |
| actually a hash table. If we have a collision, that the older |
| entry is kicked out. */ |
| struct alg_hash_entry x_alg_hash[NUM_ALG_HASH_ENTRIES]; |
| |
| /* True if x_alg_hash might already have been used. */ |
| bool x_alg_hash_used_p; |
| |
| /* Nonzero means divides or modulus operations are relatively cheap for |
| powers of two, so don't use branches; emit the operation instead. |
| Usually, this will mean that the MD file will emit non-branch |
| sequences. */ |
| struct expmed_op_cheap x_sdiv_pow2_cheap; |
| struct expmed_op_cheap x_smod_pow2_cheap; |
| |
| /* Cost of various pieces of RTL. Note that some of these are indexed by |
| shift count and some by mode. */ |
| int x_zero_cost[2]; |
| struct expmed_op_costs x_add_cost; |
| struct expmed_op_costs x_neg_cost; |
| struct expmed_op_costs x_shift_cost[MAX_BITS_PER_WORD]; |
| struct expmed_op_costs x_shiftadd_cost[MAX_BITS_PER_WORD]; |
| struct expmed_op_costs x_shiftsub0_cost[MAX_BITS_PER_WORD]; |
| struct expmed_op_costs x_shiftsub1_cost[MAX_BITS_PER_WORD]; |
| struct expmed_op_costs x_mul_cost; |
| struct expmed_op_costs x_sdiv_cost; |
| struct expmed_op_costs x_udiv_cost; |
| int x_mul_widen_cost[2][NUM_MODE_INT]; |
| int x_mul_highpart_cost[2][NUM_MODE_INT]; |
| |
| /* Conversion costs are only defined between two scalar integer modes |
| of different sizes. The first machine mode is the destination mode, |
| and the second is the source mode. */ |
| int x_convert_cost[2][NUM_MODE_IP_INT][NUM_MODE_IP_INT]; |
| }; |
| |
| extern struct target_expmed default_target_expmed; |
| #if SWITCHABLE_TARGET |
| extern struct target_expmed *this_target_expmed; |
| #else |
| #define this_target_expmed (&default_target_expmed) |
| #endif |
| |
| /* Return a pointer to the alg_hash_entry at IDX. */ |
| |
| static inline struct alg_hash_entry * |
| alg_hash_entry_ptr (int idx) |
| { |
| return &this_target_expmed->x_alg_hash[idx]; |
| } |
| |
| /* Return true if the x_alg_hash field might have been used. */ |
| |
| static inline bool |
| alg_hash_used_p (void) |
| { |
| return this_target_expmed->x_alg_hash_used_p; |
| } |
| |
| /* Set whether the x_alg_hash field might have been used. */ |
| |
| static inline void |
| set_alg_hash_used_p (bool usedp) |
| { |
| this_target_expmed->x_alg_hash_used_p = usedp; |
| } |
| |
| /* Compute an index into the cost arrays by mode class. */ |
| |
| static inline int |
| expmed_mode_index (machine_mode mode) |
| { |
| switch (GET_MODE_CLASS (mode)) |
| { |
| case MODE_INT: |
| return mode - MIN_MODE_INT; |
| case MODE_PARTIAL_INT: |
| /* If there are no partial integer modes, help the compiler |
| to figure out this will never happen. See PR59934. */ |
| if (MIN_MODE_PARTIAL_INT != VOIDmode) |
| return mode - MIN_MODE_PARTIAL_INT + NUM_MODE_INT; |
| break; |
| case MODE_VECTOR_INT: |
| /* If there are no vector integer modes, help the compiler |
| to figure out this will never happen. See PR59934. */ |
| if (MIN_MODE_VECTOR_INT != VOIDmode) |
| return mode - MIN_MODE_VECTOR_INT + NUM_MODE_IP_INT; |
| break; |
| default: |
| break; |
| } |
| gcc_unreachable (); |
| } |
| |
| /* Return a pointer to a boolean contained in EOC indicating whether |
| a particular operation performed in MODE is cheap when optimizing |
| for SPEED. */ |
| |
| static inline bool * |
| expmed_op_cheap_ptr (struct expmed_op_cheap *eoc, bool speed, |
| machine_mode mode) |
| { |
| int idx = expmed_mode_index (mode); |
| return &eoc->cheap[speed][idx]; |
| } |
| |
| /* Return a pointer to a cost contained in COSTS when a particular |
| operation is performed in MODE when optimizing for SPEED. */ |
| |
| static inline int * |
| expmed_op_cost_ptr (struct expmed_op_costs *costs, bool speed, |
| machine_mode mode) |
| { |
| int idx = expmed_mode_index (mode); |
| return &costs->cost[speed][idx]; |
| } |
| |
| /* Subroutine of {set_,}sdiv_pow2_cheap. Not to be used otherwise. */ |
| |
| static inline bool * |
| sdiv_pow2_cheap_ptr (bool speed, machine_mode mode) |
| { |
| return expmed_op_cheap_ptr (&this_target_expmed->x_sdiv_pow2_cheap, |
| speed, mode); |
| } |
| |
| /* Set whether a signed division by a power of 2 is cheap in MODE |
| when optimizing for SPEED. */ |
| |
| static inline void |
| set_sdiv_pow2_cheap (bool speed, machine_mode mode, bool cheap_p) |
| { |
| *sdiv_pow2_cheap_ptr (speed, mode) = cheap_p; |
| } |
| |
| /* Return whether a signed division by a power of 2 is cheap in MODE |
| when optimizing for SPEED. */ |
| |
| static inline bool |
| sdiv_pow2_cheap (bool speed, machine_mode mode) |
| { |
| return *sdiv_pow2_cheap_ptr (speed, mode); |
| } |
| |
| /* Subroutine of {set_,}smod_pow2_cheap. Not to be used otherwise. */ |
| |
| static inline bool * |
| smod_pow2_cheap_ptr (bool speed, machine_mode mode) |
| { |
| return expmed_op_cheap_ptr (&this_target_expmed->x_smod_pow2_cheap, |
| speed, mode); |
| } |
| |
| /* Set whether a signed modulo by a power of 2 is CHEAP in MODE when |
| optimizing for SPEED. */ |
| |
| static inline void |
| set_smod_pow2_cheap (bool speed, machine_mode mode, bool cheap) |
| { |
| *smod_pow2_cheap_ptr (speed, mode) = cheap; |
| } |
| |
| /* Return whether a signed modulo by a power of 2 is cheap in MODE |
| when optimizing for SPEED. */ |
| |
| static inline bool |
| smod_pow2_cheap (bool speed, machine_mode mode) |
| { |
| return *smod_pow2_cheap_ptr (speed, mode); |
| } |
| |
| /* Subroutine of {set_,}zero_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| zero_cost_ptr (bool speed) |
| { |
| return &this_target_expmed->x_zero_cost[speed]; |
| } |
| |
| /* Set the COST of loading zero when optimizing for SPEED. */ |
| |
| static inline void |
| set_zero_cost (bool speed, int cost) |
| { |
| *zero_cost_ptr (speed) = cost; |
| } |
| |
| /* Return the COST of loading zero when optimizing for SPEED. */ |
| |
| static inline int |
| zero_cost (bool speed) |
| { |
| return *zero_cost_ptr (speed); |
| } |
| |
| /* Subroutine of {set_,}add_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| add_cost_ptr (bool speed, machine_mode mode) |
| { |
| return expmed_op_cost_ptr (&this_target_expmed->x_add_cost, speed, mode); |
| } |
| |
| /* Set the COST of computing an add in MODE when optimizing for SPEED. */ |
| |
| static inline void |
| set_add_cost (bool speed, machine_mode mode, int cost) |
| { |
| *add_cost_ptr (speed, mode) = cost; |
| } |
| |
| /* Return the cost of computing an add in MODE when optimizing for SPEED. */ |
| |
| static inline int |
| add_cost (bool speed, machine_mode mode) |
| { |
| return *add_cost_ptr (speed, mode); |
| } |
| |
| /* Subroutine of {set_,}neg_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| neg_cost_ptr (bool speed, machine_mode mode) |
| { |
| return expmed_op_cost_ptr (&this_target_expmed->x_neg_cost, speed, mode); |
| } |
| |
| /* Set the COST of computing a negation in MODE when optimizing for SPEED. */ |
| |
| static inline void |
| set_neg_cost (bool speed, machine_mode mode, int cost) |
| { |
| *neg_cost_ptr (speed, mode) = cost; |
| } |
| |
| /* Return the cost of computing a negation in MODE when optimizing for |
| SPEED. */ |
| |
| static inline int |
| neg_cost (bool speed, machine_mode mode) |
| { |
| return *neg_cost_ptr (speed, mode); |
| } |
| |
| /* Subroutine of {set_,}shift_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| shift_cost_ptr (bool speed, machine_mode mode, int bits) |
| { |
| return expmed_op_cost_ptr (&this_target_expmed->x_shift_cost[bits], |
| speed, mode); |
| } |
| |
| /* Set the COST of doing a shift in MODE by BITS when optimizing for SPEED. */ |
| |
| static inline void |
| set_shift_cost (bool speed, machine_mode mode, int bits, int cost) |
| { |
| *shift_cost_ptr (speed, mode, bits) = cost; |
| } |
| |
| /* Return the cost of doing a shift in MODE by BITS when optimizing for |
| SPEED. */ |
| |
| static inline int |
| shift_cost (bool speed, machine_mode mode, int bits) |
| { |
| return *shift_cost_ptr (speed, mode, bits); |
| } |
| |
| /* Subroutine of {set_,}shiftadd_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| shiftadd_cost_ptr (bool speed, machine_mode mode, int bits) |
| { |
| return expmed_op_cost_ptr (&this_target_expmed->x_shiftadd_cost[bits], |
| speed, mode); |
| } |
| |
| /* Set the COST of doing a shift in MODE by BITS followed by an add when |
| optimizing for SPEED. */ |
| |
| static inline void |
| set_shiftadd_cost (bool speed, machine_mode mode, int bits, int cost) |
| { |
| *shiftadd_cost_ptr (speed, mode, bits) = cost; |
| } |
| |
| /* Return the cost of doing a shift in MODE by BITS followed by an add |
| when optimizing for SPEED. */ |
| |
| static inline int |
| shiftadd_cost (bool speed, machine_mode mode, int bits) |
| { |
| return *shiftadd_cost_ptr (speed, mode, bits); |
| } |
| |
| /* Subroutine of {set_,}shiftsub0_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| shiftsub0_cost_ptr (bool speed, machine_mode mode, int bits) |
| { |
| return expmed_op_cost_ptr (&this_target_expmed->x_shiftsub0_cost[bits], |
| speed, mode); |
| } |
| |
| /* Set the COST of doing a shift in MODE by BITS and then subtracting a |
| value when optimizing for SPEED. */ |
| |
| static inline void |
| set_shiftsub0_cost (bool speed, machine_mode mode, int bits, int cost) |
| { |
| *shiftsub0_cost_ptr (speed, mode, bits) = cost; |
| } |
| |
| /* Return the cost of doing a shift in MODE by BITS and then subtracting |
| a value when optimizing for SPEED. */ |
| |
| static inline int |
| shiftsub0_cost (bool speed, machine_mode mode, int bits) |
| { |
| return *shiftsub0_cost_ptr (speed, mode, bits); |
| } |
| |
| /* Subroutine of {set_,}shiftsub1_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| shiftsub1_cost_ptr (bool speed, machine_mode mode, int bits) |
| { |
| return expmed_op_cost_ptr (&this_target_expmed->x_shiftsub1_cost[bits], |
| speed, mode); |
| } |
| |
| /* Set the COST of subtracting a shift in MODE by BITS from a value when |
| optimizing for SPEED. */ |
| |
| static inline void |
| set_shiftsub1_cost (bool speed, machine_mode mode, int bits, int cost) |
| { |
| *shiftsub1_cost_ptr (speed, mode, bits) = cost; |
| } |
| |
| /* Return the cost of subtracting a shift in MODE by BITS from a value |
| when optimizing for SPEED. */ |
| |
| static inline int |
| shiftsub1_cost (bool speed, machine_mode mode, int bits) |
| { |
| return *shiftsub1_cost_ptr (speed, mode, bits); |
| } |
| |
| /* Subroutine of {set_,}mul_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| mul_cost_ptr (bool speed, machine_mode mode) |
| { |
| return expmed_op_cost_ptr (&this_target_expmed->x_mul_cost, speed, mode); |
| } |
| |
| /* Set the COST of doing a multiplication in MODE when optimizing for |
| SPEED. */ |
| |
| static inline void |
| set_mul_cost (bool speed, machine_mode mode, int cost) |
| { |
| *mul_cost_ptr (speed, mode) = cost; |
| } |
| |
| /* Return the cost of doing a multiplication in MODE when optimizing |
| for SPEED. */ |
| |
| static inline int |
| mul_cost (bool speed, machine_mode mode) |
| { |
| return *mul_cost_ptr (speed, mode); |
| } |
| |
| /* Subroutine of {set_,}sdiv_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| sdiv_cost_ptr (bool speed, machine_mode mode) |
| { |
| return expmed_op_cost_ptr (&this_target_expmed->x_sdiv_cost, speed, mode); |
| } |
| |
| /* Set the COST of doing a signed division in MODE when optimizing |
| for SPEED. */ |
| |
| static inline void |
| set_sdiv_cost (bool speed, machine_mode mode, int cost) |
| { |
| *sdiv_cost_ptr (speed, mode) = cost; |
| } |
| |
| /* Return the cost of doing a signed division in MODE when optimizing |
| for SPEED. */ |
| |
| static inline int |
| sdiv_cost (bool speed, machine_mode mode) |
| { |
| return *sdiv_cost_ptr (speed, mode); |
| } |
| |
| /* Subroutine of {set_,}udiv_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| udiv_cost_ptr (bool speed, machine_mode mode) |
| { |
| return expmed_op_cost_ptr (&this_target_expmed->x_udiv_cost, speed, mode); |
| } |
| |
| /* Set the COST of doing an unsigned division in MODE when optimizing |
| for SPEED. */ |
| |
| static inline void |
| set_udiv_cost (bool speed, machine_mode mode, int cost) |
| { |
| *udiv_cost_ptr (speed, mode) = cost; |
| } |
| |
| /* Return the cost of doing an unsigned division in MODE when |
| optimizing for SPEED. */ |
| |
| static inline int |
| udiv_cost (bool speed, machine_mode mode) |
| { |
| return *udiv_cost_ptr (speed, mode); |
| } |
| |
| /* Subroutine of {set_,}mul_widen_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| mul_widen_cost_ptr (bool speed, machine_mode mode) |
| { |
| gcc_assert (GET_MODE_CLASS (mode) == MODE_INT); |
| |
| return &this_target_expmed->x_mul_widen_cost[speed][mode - MIN_MODE_INT]; |
| } |
| |
| /* Set the COST for computing a widening multiplication in MODE when |
| optimizing for SPEED. */ |
| |
| static inline void |
| set_mul_widen_cost (bool speed, machine_mode mode, int cost) |
| { |
| *mul_widen_cost_ptr (speed, mode) = cost; |
| } |
| |
| /* Return the cost for computing a widening multiplication in MODE when |
| optimizing for SPEED. */ |
| |
| static inline int |
| mul_widen_cost (bool speed, machine_mode mode) |
| { |
| return *mul_widen_cost_ptr (speed, mode); |
| } |
| |
| /* Subroutine of {set_,}mul_highpart_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| mul_highpart_cost_ptr (bool speed, machine_mode mode) |
| { |
| gcc_assert (GET_MODE_CLASS (mode) == MODE_INT); |
| int m = mode - MIN_MODE_INT; |
| gcc_assert (m < NUM_MODE_INT); |
| |
| return &this_target_expmed->x_mul_highpart_cost[speed][m]; |
| } |
| |
| /* Set the COST for computing the high part of a multiplication in MODE |
| when optimizing for SPEED. */ |
| |
| static inline void |
| set_mul_highpart_cost (bool speed, machine_mode mode, int cost) |
| { |
| *mul_highpart_cost_ptr (speed, mode) = cost; |
| } |
| |
| /* Return the cost for computing the high part of a multiplication in MODE |
| when optimizing for SPEED. */ |
| |
| static inline int |
| mul_highpart_cost (bool speed, machine_mode mode) |
| { |
| return *mul_highpart_cost_ptr (speed, mode); |
| } |
| |
| /* Subroutine of {set_,}convert_cost. Not to be used otherwise. */ |
| |
| static inline int * |
| convert_cost_ptr (machine_mode to_mode, machine_mode from_mode, |
| bool speed) |
| { |
| int to_idx = expmed_mode_index (to_mode); |
| int from_idx = expmed_mode_index (from_mode); |
| |
| gcc_assert (IN_RANGE (to_idx, 0, NUM_MODE_IP_INT - 1)); |
| gcc_assert (IN_RANGE (from_idx, 0, NUM_MODE_IP_INT - 1)); |
| |
| return &this_target_expmed->x_convert_cost[speed][to_idx][from_idx]; |
| } |
| |
| /* Set the COST for converting from FROM_MODE to TO_MODE when optimizing |
| for SPEED. */ |
| |
| static inline void |
| set_convert_cost (machine_mode to_mode, machine_mode from_mode, |
| bool speed, int cost) |
| { |
| *convert_cost_ptr (to_mode, from_mode, speed) = cost; |
| } |
| |
| /* Return the cost for converting from FROM_MODE to TO_MODE when optimizing |
| for SPEED. */ |
| |
| static inline int |
| convert_cost (machine_mode to_mode, machine_mode from_mode, |
| bool speed) |
| { |
| return *convert_cost_ptr (to_mode, from_mode, speed); |
| } |
| |
| extern int mult_by_coeff_cost (HOST_WIDE_INT, machine_mode, bool); |
| extern rtx emit_cstore (rtx target, enum insn_code icode, enum rtx_code code, |
| machine_mode mode, machine_mode compare_mode, |
| int unsignedp, rtx x, rtx y, int normalizep, |
| machine_mode target_mode); |
| |
| /* Arguments MODE, RTX: return an rtx for the negation of that value. |
| May emit insns. */ |
| extern rtx negate_rtx (machine_mode, rtx); |
| |
| /* Arguments MODE, RTX: return an rtx for the flipping of that value. |
| May emit insns. */ |
| extern rtx flip_storage_order (machine_mode, rtx); |
| |
| /* Expand a logical AND operation. */ |
| extern rtx expand_and (machine_mode, rtx, rtx, rtx); |
| |
| /* Emit a store-flag operation. */ |
| extern rtx emit_store_flag (rtx, enum rtx_code, rtx, rtx, machine_mode, |
| int, int); |
| |
| /* Like emit_store_flag, but always succeeds. */ |
| extern rtx emit_store_flag_force (rtx, enum rtx_code, rtx, rtx, |
| machine_mode, int, int); |
| |
| /* Choose a minimal N + 1 bit approximation to 1/D that can be used to |
| replace division by D, and put the least significant N bits of the result |
| in *MULTIPLIER_PTR and return the most significant bit. */ |
| extern unsigned HOST_WIDE_INT choose_multiplier (unsigned HOST_WIDE_INT, int, |
| int, unsigned HOST_WIDE_INT *, |
| int *, int *); |
| |
| #ifdef TREE_CODE |
| extern rtx expand_variable_shift (enum tree_code, machine_mode, |
| rtx, tree, rtx, int); |
| extern rtx expand_shift (enum tree_code, machine_mode, rtx, int, rtx, |
| int); |
| extern rtx expand_divmod (int, enum tree_code, machine_mode, rtx, rtx, |
| rtx, int); |
| #endif |
| |
| extern void store_bit_field (rtx, unsigned HOST_WIDE_INT, |
| unsigned HOST_WIDE_INT, |
| unsigned HOST_WIDE_INT, |
| unsigned HOST_WIDE_INT, |
| machine_mode, rtx, bool); |
| extern rtx extract_bit_field (rtx, unsigned HOST_WIDE_INT, |
| unsigned HOST_WIDE_INT, int, rtx, |
| machine_mode, machine_mode, bool, rtx *); |
| extern rtx extract_low_bits (machine_mode, machine_mode, rtx); |
| extern rtx expand_mult (machine_mode, rtx, rtx, rtx, int, bool = false); |
| extern rtx expand_mult_highpart_adjust (scalar_int_mode, rtx, rtx, rtx, |
| rtx, int); |
| |
| #endif // EXPMED_H |