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Split off .c file from precomputed_ecmult.h

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This commit is contained in:
Pieter Wuille
2021-12-17 14:21:38 -05:00
parent 1a6691adae
commit 19d96e15f9
7 changed files with 16486 additions and 16485 deletions
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2
src/ecmult_impl.h
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@@ -103,7 +103,7 @@ static void secp256k1_ecmult_odd_multiples_table(int n, secp256k1_gej *prej, sec
* It only operates on tables sized for WINDOW_A wnaf multiples.
*
* To compute a*P + b*G, we compute a table for P using this function,
* and use the precomputed table in <precomputed_ecmult.h> for G.
* and use the precomputed table in <precomputed_ecmult.c> for G.
*/
static void secp256k1_ecmult_odd_multiples_table_globalz_windowa(secp256k1_ge *pre, secp256k1_fe *globalz, const secp256k1_gej *a) {
secp256k1_gej prej[ECMULT_TABLE_SIZE(WINDOW_A)];

38
src/precompute_ecmult.c
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@@ -25,7 +25,7 @@ static void print_table(FILE *fp, const char *name, int window_g, const secp256k
int j;
int i;
fprintf(fp, "static const secp256k1_ge_storage %s[ECMULT_TABLE_SIZE(WINDOW_G)] = {\n", name);
fprintf(fp, "const secp256k1_ge_storage %s[ECMULT_TABLE_SIZE(WINDOW_G)] = {\n", name);
fprintf(fp, " S(%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32
",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32")\n",
SECP256K1_GE_STORAGE_CONST_GET(table[0]));
@@ -57,11 +57,9 @@ static void print_two_tables(FILE *fp, int window_g) {
}
int main(void) {
const int window_g_13 = 4;
const int window_g_199 = 8;
FILE* fp;
fp = fopen("src/precomputed_ecmult.h","w");
fp = fopen("src/precomputed_ecmult.c","w");
if (fp == NULL) {
fprintf(stderr, "Could not open src/precomputed_ecmult.h for writing!\n");
return -1;
@@ -71,36 +69,24 @@ int main(void) {
fprintf(fp, "/* This file contains an array secp256k1_pre_g with odd multiples of the base point G and\n");
fprintf(fp, " * an array secp256k1_pre_g_128 with odd multiples of 2^128*G for accelerating the computation of a*P + b*G.\n");
fprintf(fp, " */\n");
fprintf(fp, "#ifndef SECP256K1_PRECOMPUTED_ECMULT_H\n");
fprintf(fp, "#define SECP256K1_PRECOMPUTED_ECMULT_H\n");
fprintf(fp, "#if defined HAVE_CONFIG_H\n");
fprintf(fp, "#include \"libsecp256k1-config.h\"\n");
fprintf(fp, "#endif\n");
fprintf(fp, "#include \"../include/secp256k1.h\"\n");
fprintf(fp, "#include \"group.h\"\n");
fprintf(fp, "#ifdef S\n");
fprintf(fp, " #error macro identifier S already in use.\n");
fprintf(fp, "#endif\n");
fprintf(fp, "#define S(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) "
"SECP256K1_GE_STORAGE_CONST(0x##a##u,0x##b##u,0x##c##u,0x##d##u,0x##e##u,0x##f##u,0x##g##u,"
"0x##h##u,0x##i##u,0x##j##u,0x##k##u,0x##l##u,0x##m##u,0x##n##u,0x##o##u,0x##p##u)\n");
fprintf(fp, "#include \"ecmult.h\"\n");
fprintf(fp, "#define S(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) SECP256K1_GE_STORAGE_CONST(0x##a##u,0x##b##u,0x##c##u,0x##d##u,0x##e##u,0x##f##u,0x##g##u,0x##h##u,0x##i##u,0x##j##u,0x##k##u,0x##l##u,0x##m##u,0x##n##u,0x##o##u,0x##p##u)\n");
fprintf(fp, "#if ECMULT_TABLE_SIZE(ECMULT_WINDOW_SIZE) > %ld\n", ECMULT_TABLE_SIZE(ECMULT_WINDOW_SIZE));
fprintf(fp, " #error configuration mismatch, invalid ECMULT_WINDOW_SIZE. Try deleting precomputed_ecmult.h before the build.\n");
fprintf(fp, " #error configuration mismatch, invalid ECMULT_WINDOW_SIZE. Try deleting precomputed_ecmult.c before the build.\n");
fprintf(fp, "#endif\n");
fprintf(fp, "#if defined(EXHAUSTIVE_TEST_ORDER)\n");
fprintf(fp, "#if EXHAUSTIVE_TEST_ORDER == 13\n");
fprintf(fp, "#define WINDOW_G %d\n", window_g_13);
fprintf(fp, "#elif EXHAUSTIVE_TEST_ORDER == 199\n");
fprintf(fp, "#define WINDOW_G %d\n", window_g_199);
fprintf(fp, "#else\n");
fprintf(fp, " #error No known generator for the specified exhaustive test group order.\n");
fprintf(fp, "#endif\n");
fprintf(fp, "static secp256k1_ge_storage secp256k1_pre_g[ECMULT_TABLE_SIZE(WINDOW_G)];\n");
fprintf(fp, "static secp256k1_ge_storage secp256k1_pre_g_128[ECMULT_TABLE_SIZE(WINDOW_G)];\n");
fprintf(fp, "#else /* !defined(EXHAUSTIVE_TEST_ORDER) */\n");
fprintf(fp, "#ifdef EXHAUSTIVE_TEST_ORDER\n");
fprintf(fp, "#error Cannot compile precomputed_ecmult.c in exhaustive test mode\n");
fprintf(fp, "#endif /* EXHAUSTIVE_TEST_ORDER */\n");
fprintf(fp, "#define WINDOW_G ECMULT_WINDOW_SIZE\n");
print_two_tables(fp, ECMULT_WINDOW_SIZE);
fprintf(fp, "#endif /* defined(EXHAUSTIVE_TEST_ORDER) */\n");
fprintf(fp, "#undef S\n");
fprintf(fp, "#endif /* SECP256K1_PRECOMPUTED_ECMULT_H */\n");
fclose(fp);
return 0;

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src/precomputed_ecmult.c generated Normal file
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src/precomputed_ecmult.h
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