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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /security/nss/lib/freebl/mpi/mpi_hp.c | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'security/nss/lib/freebl/mpi/mpi_hp.c')
-rw-r--r-- | security/nss/lib/freebl/mpi/mpi_hp.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/mpi/mpi_hp.c b/security/nss/lib/freebl/mpi/mpi_hp.c new file mode 100644 index 000000000..0cea7685d --- /dev/null +++ b/security/nss/lib/freebl/mpi/mpi_hp.c @@ -0,0 +1,81 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* This file contains routines that perform vector multiplication. */ + +#include "mpi-priv.h" +#include <unistd.h> + +#include <stddef.h> +/* #include <sys/systeminfo.h> */ +#include <strings.h> + +extern void multacc512( + int length, /* doublewords in multiplicand vector. */ + const mp_digit *scalaraddr, /* Address of scalar. */ + const mp_digit *multiplicand, /* The multiplicand vector. */ + mp_digit *result); /* Where to accumulate the result. */ + +extern void maxpy_little( + int length, /* doublewords in multiplicand vector. */ + const mp_digit *scalaraddr, /* Address of scalar. */ + const mp_digit *multiplicand, /* The multiplicand vector. */ + mp_digit *result); /* Where to accumulate the result. */ + +extern void add_diag_little( + int length, /* doublewords in input vector. */ + const mp_digit *root, /* The vector to square. */ + mp_digit *result); /* Where to accumulate the result. */ + +void +s_mpv_sqr_add_prop(const mp_digit *pa, mp_size a_len, mp_digit *ps) +{ + add_diag_little(a_len, pa, ps); +} + +#define MAX_STACK_DIGITS 258 +#define MULTACC512_LEN (512 / MP_DIGIT_BIT) +#define HP_MPY_ADD_FN (a_len == MULTACC512_LEN ? multacc512 : maxpy_little) + +/* c = a * b */ +void +s_mpv_mul_d(const mp_digit *a, mp_size a_len, mp_digit b, mp_digit *c) +{ + mp_digit x[MAX_STACK_DIGITS]; + mp_digit *px = x; + size_t xSize = 0; + + if (a == c) { + if (a_len > MAX_STACK_DIGITS) { + xSize = sizeof(mp_digit) * (a_len + 2); + px = malloc(xSize); + if (!px) + return; + } + memcpy(px, a, a_len * sizeof(*a)); + a = px; + } + s_mp_setz(c, a_len + 1); + HP_MPY_ADD_FN(a_len, &b, a, c); + if (px != x && px) { + memset(px, 0, xSize); + free(px); + } +} + +/* c += a * b, where a is a_len words long. */ +void +s_mpv_mul_d_add(const mp_digit *a, mp_size a_len, mp_digit b, mp_digit *c) +{ + c[a_len] = 0; /* so carry propagation stops here. */ + HP_MPY_ADD_FN(a_len, &b, a, c); +} + +/* c += a * b, where a is y words long. */ +void +s_mpv_mul_d_add_prop(const mp_digit *a, mp_size a_len, mp_digit b, + mp_digit *c) +{ + HP_MPY_ADD_FN(a_len, &b, a, c); +} |