GCC Middle and Back End API Reference
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#include <expmed.h>
Data Fields | |
struct mult_cost | cost |
short | ops |
enum alg_code | op [MAX_BITS_PER_WORD] |
char | log [MAX_BITS_PER_WORD] |
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.
Referenced by choose_mult_variant(), expand_expr_real_2(), expmed_mult_highpart(), and mult_by_coeff_cost().
char algorithm::log[MAX_BITS_PER_WORD] |
Referenced by expand_mult_const(), and vect_synth_mult_by_constant().
enum alg_code algorithm::op[MAX_BITS_PER_WORD] |
short algorithm::ops |
Referenced by expand_expr_real_2(), expand_mult_const(), target_supports_mult_synth_alg(), and vect_synth_mult_by_constant().