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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /security/nss/lib/freebl/mpi/mpi_hp.c
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (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.c81
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
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--- /dev/null
+++ b/security/nss/lib/freebl/mpi/mpi_hp.c
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+/* 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);
+}