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TELEPEN: fix stop length (14 -> 12)

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reedsol.c: some performance gain by stashing generated poly logs and
  pre-checking if has a zero coeff to avoid inner loop branch
This commit is contained in:
gitlost
2021-11-11 13:30:58 +00:00
parent 7e3d0f2405
commit 21d015a84a
4 changed files with 129 additions and 56 deletions
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18
backend/reedsol.h
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@@ -31,8 +31,8 @@
*/
/* vim: set ts=4 sw=4 et : */
#ifndef __REEDSOL_H
#define __REEDSOL_H
#ifndef Z_REEDSOL_H
#define Z_REEDSOL_H
#ifdef __cplusplus
extern "C" {
@@ -41,15 +41,19 @@ extern "C" {
typedef struct {
const unsigned char *logt; /* These are static */
const unsigned char *alog;
unsigned char rspoly[256];
int nsym;
unsigned char rspoly[256]; /* Generated poly */
unsigned char log_rspoly[256]; /* Logs of poly */
int nsym; /* Degree of poly */
int zero; /* Set if poly has a zero coeff */
} rs_t;
typedef struct {
unsigned int *logt; /* These are malloced */
unsigned int *alog;
unsigned short rspoly[4096]; /* 12-bit max - needs to be enlarged if > 12-bit used */
int nsym;
unsigned short rspoly[4096]; /* Generated poly, 12-bit max - needs to be enlarged if > 12-bit used */
unsigned int log_rspoly[4096]; /* Logs of poly */
int nsym; /* Degree of poly */
int zero; /* Set if poly has a zero coeff */
} rs_uint_t;
INTERNAL void rs_init_gf(rs_t *rs, const unsigned int prime_poly);
@@ -68,4 +72,4 @@ INTERNAL void rs_uint_free(rs_uint_t *rs_uint);
}
#endif /* __cplusplus */
#endif /* __REEDSOL_H */
#endif /* Z_REEDSOL_H */