#include <expmed.h>
Data Fields | |
| struct alg_hash_entry | x_alg_hash [NUM_ALG_HASH_ENTRIES] |
| bool | x_alg_hash_used_p |
| struct expmed_op_cheap | x_sdiv_pow2_cheap |
| struct expmed_op_cheap | x_smod_pow2_cheap |
| 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] |
| int | x_convert_cost [2][NUM_MODE_IP_INT][NUM_MODE_IP_INT] |
Detailed Description
Target-dependent globals.
Field Documentation
| struct expmed_op_costs target_expmed::x_add_cost |
Referenced by smod_pow2_cheap().
| struct alg_hash_entry target_expmed::x_alg_hash[NUM_ALG_HASH_ENTRIES] |
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.
| bool target_expmed::x_alg_hash_used_p |
True if x_alg_hash might already have been used.
| int target_expmed::x_convert_cost[2][NUM_MODE_IP_INT][NUM_MODE_IP_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.
| struct expmed_op_costs target_expmed::x_mul_cost |
| int target_expmed::x_mul_highpart_cost[2][NUM_MODE_INT] |
Referenced by sdiv_cost().
| int target_expmed::x_mul_widen_cost[2][NUM_MODE_INT] |
| struct expmed_op_costs target_expmed::x_neg_cost |
| struct expmed_op_costs target_expmed::x_sdiv_cost |
Referenced by shiftsub1_cost_ptr().
| struct expmed_op_cheap target_expmed::x_sdiv_pow2_cheap |
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_costs target_expmed::x_shift_cost[MAX_BITS_PER_WORD] |
| struct expmed_op_costs target_expmed::x_shiftadd_cost[MAX_BITS_PER_WORD] |
Referenced by set_neg_cost().
| struct expmed_op_costs target_expmed::x_shiftsub0_cost[MAX_BITS_PER_WORD] |
Referenced by set_shift_cost().
| struct expmed_op_costs target_expmed::x_shiftsub1_cost[MAX_BITS_PER_WORD] |
Referenced by set_shiftadd_cost().
| struct expmed_op_cheap target_expmed::x_smod_pow2_cheap |
Referenced by sdiv_pow2_cheap_ptr().
| struct expmed_op_costs target_expmed::x_udiv_cost |
Referenced by mul_cost_ptr().
| int target_expmed::x_zero_cost[2] |
Cost of various pieces of RTL. Note that some of these are indexed by shift count and some by mode.
The documentation for this struct was generated from the following file:
