7714518f1
Denys Vlasenko
2021-10-01
Subject
tls: code shrink P256 code
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Commit Diff GitHub →
networking/tls_sp_c32.c+12 -14
| @@ -70,6 +70,16 @@ static const sp_digit p256_mod[10] = { | |
| #define p256_mp_mod ((sp_digit)0x000001) | |
| + | /* Normalize the values in each word to 26 bits. */ |
| + | static void sp_256_norm_10(sp_digit* a) |
| + | { |
| + | int i; |
| + | for (i = 0; i < 9; i++) { |
| + | a[i+1] += a[i] >> 26; |
| + | a[i] &= 0x3ffffff; |
| + | } |
| + | } |
| + | |
| /* Write r as big endian to byte aray. | |
| * Fixed length number of bytes written: 32 | |
| * | |
| @@ -80,10 +90,8 @@ static void sp_256_to_bin(sp_digit* r, uint8_t* a) | |
| { | |
| int i, j, s = 0, b; | |
| - | for (i = 0; i < 9; i++) { |
| - | r[i+1] += r[i] >> 26; |
| - | r[i] &= 0x3ffffff; |
| - | } |
| + | sp_256_norm_10(r); |
| + | |
| j = 256 / 8 - 1; | |
| a[j] = 0; | |
| for (i = 0; i < 10 && j >= 0; i++) { | |
| @@ -171,16 +179,6 @@ static int sp_256_cmp_equal_10(const sp_digit* a, const sp_digit* b) | |
| return sp_256_cmp_10(a, b) == 0; | |
| } | |
| - | /* Normalize the values in each word to 26 bits. */ |
| - | static void sp_256_norm_10(sp_digit* a) |
| - | { |
| - | int i; |
| - | for (i = 0; i < 9; i++) { |
| - | a[i+1] += a[i] >> 26; |
| - | a[i] &= 0x3ffffff; |
| - | } |
| - | } |
| - | |
| /* Add b to a into r. (r = a + b) */ | |
| static void sp_256_add_10(sp_digit* r, const sp_digit* a, const sp_digit* b) | |
| { | |