1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/nss/lib/freebl/mpi/mpi_arm.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,171 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +/* This inlined version is for 32-bit ARM platform only */
1.9 +
1.10 +#if !defined(__arm__)
1.11 +#error "This is for ARM only"
1.12 +#endif
1.13 +
1.14 +/* 16-bit thumb doesn't work inlined assember version */
1.15 +#if (!defined(__thumb__) || defined(__thumb2__)) && !defined(__ARM_ARCH_3__)
1.16 +
1.17 +#include "mpi-priv.h"
1.18 +
1.19 +#ifdef MP_ASSEMBLY_MULTIPLY
1.20 +void s_mpv_mul_d(const mp_digit *a, mp_size a_len, mp_digit b, mp_digit *c)
1.21 +{
1.22 + __asm__ __volatile__(
1.23 + "mov r5, #0\n"
1.24 +#ifdef __thumb2__
1.25 + "cbz %1, 2f\n"
1.26 +#else
1.27 + "cmp %1, r5\n" /* r5 is 0 now */
1.28 + "beq 2f\n"
1.29 +#endif
1.30 +
1.31 + "1:\n"
1.32 + "mov r4, #0\n"
1.33 + "ldr r6, [%0], #4\n"
1.34 + "umlal r5, r4, r6, %2\n"
1.35 + "str r5, [%3], #4\n"
1.36 + "mov r5, r4\n"
1.37 +
1.38 + "subs %1, #1\n"
1.39 + "bne 1b\n"
1.40 +
1.41 + "2:\n"
1.42 + "str r5, [%3]\n"
1.43 + :
1.44 + : "r"(a), "r"(a_len), "r"(b), "r"(c)
1.45 + : "memory", "cc", "%r4", "%r5", "%r6");
1.46 +}
1.47 +
1.48 +void s_mpv_mul_d_add(const mp_digit *a, mp_size a_len, mp_digit b, mp_digit *c)
1.49 +{
1.50 + __asm__ __volatile__(
1.51 + "mov r5, #0\n"
1.52 +#ifdef __thumb2__
1.53 + "cbz %1, 2f\n"
1.54 +#else
1.55 + "cmp %1, r5\n" /* r5 is 0 now */
1.56 + "beq 2f\n"
1.57 +#endif
1.58 +
1.59 + "1:\n"
1.60 + "mov r4, #0\n"
1.61 + "ldr r6, [%3]\n"
1.62 + "adds r5, r6\n"
1.63 + "adc r4, r4, #0\n"
1.64 +
1.65 + "ldr r6, [%0], #4\n"
1.66 + "umlal r5, r4, r6, %2\n"
1.67 + "str r5, [%3], #4\n"
1.68 + "mov r5, r4\n"
1.69 +
1.70 + "subs %1, #1\n"
1.71 + "bne 1b\n"
1.72 +
1.73 + "2:\n"
1.74 + "str r5, [%3]\n"
1.75 + :
1.76 + : "r"(a), "r"(a_len), "r"(b), "r"(c)
1.77 + : "memory", "cc", "%r4", "%r5", "%r6");
1.78 +}
1.79 +
1.80 +void s_mpv_mul_d_add_prop(const mp_digit *a, mp_size a_len, mp_digit b, mp_digit *c)
1.81 +{
1.82 + if (!a_len)
1.83 + return;
1.84 +
1.85 + __asm__ __volatile__(
1.86 + "mov r5, #0\n"
1.87 +
1.88 + "1:\n"
1.89 + "mov r4, #0\n"
1.90 + "ldr r6, [%3]\n"
1.91 + "adds r5, r6\n"
1.92 + "adc r4, r4, #0\n"
1.93 + "ldr r6, [%0], #4\n"
1.94 + "umlal r5, r4, r6, %2\n"
1.95 + "str r5, [%3], #4\n"
1.96 + "mov r5, r4\n"
1.97 +
1.98 + "subs %1, #1\n"
1.99 + "bne 1b\n"
1.100 +
1.101 +#ifdef __thumb2__
1.102 + "cbz r4, 3f\n"
1.103 +#else
1.104 + "cmp r4, #0\n"
1.105 + "beq 3f\n"
1.106 +#endif
1.107 +
1.108 + "2:\n"
1.109 + "mov r4, #0\n"
1.110 + "ldr r6, [%3]\n"
1.111 + "adds r5, r6\n"
1.112 + "adc r4, r4, #0\n"
1.113 + "str r5, [%3], #4\n"
1.114 + "movs r5, r4\n"
1.115 + "bne 2b\n"
1.116 +
1.117 + "3:\n"
1.118 + :
1.119 + : "r"(a), "r"(a_len), "r"(b), "r"(c)
1.120 + : "memory", "cc", "%r4", "%r5", "%r6");
1.121 +}
1.122 +#endif
1.123 +
1.124 +#ifdef MP_ASSEMBLY_SQUARE
1.125 +void s_mpv_sqr_add_prop(const mp_digit *pa, mp_size a_len, mp_digit *ps)
1.126 +{
1.127 + if (!a_len)
1.128 + return;
1.129 +
1.130 + __asm__ __volatile__(
1.131 + "mov r3, #0\n"
1.132 +
1.133 + "1:\n"
1.134 + "mov r4, #0\n"
1.135 + "ldr r6, [%0], #4\n"
1.136 + "ldr r5, [%2]\n"
1.137 + "adds r3, r5\n"
1.138 + "adc r4, r4, #0\n"
1.139 + "umlal r3, r4, r6, r6\n" /* w = r3:r4 */
1.140 + "str r3, [%2], #4\n"
1.141 +
1.142 + "ldr r5, [%2]\n"
1.143 + "adds r3, r4, r5\n"
1.144 + "mov r4, #0\n"
1.145 + "adc r4, r4, #0\n"
1.146 + "str r3, [%2], #4\n"
1.147 + "mov r3, r4\n"
1.148 +
1.149 + "subs %1, #1\n"
1.150 + "bne 1b\n"
1.151 +
1.152 +#ifdef __thumb2__
1.153 + "cbz r3, 3f\n"
1.154 +#else
1.155 + "cmp r3, #0\n"
1.156 + "beq 3f\n"
1.157 +#endif
1.158 +
1.159 + "2:\n"
1.160 + "mov r4, #0\n"
1.161 + "ldr r5, [%2]\n"
1.162 + "adds r3, r5\n"
1.163 + "adc r4, r4, #0\n"
1.164 + "str r3, [%2], #4\n"
1.165 + "movs r3, r4\n"
1.166 + "bne 2b\n"
1.167 +
1.168 + "3:"
1.169 + :
1.170 + : "r"(pa), "r"(a_len), "r"(ps)
1.171 + : "memory", "cc", "%r3", "%r4", "%r5", "%r6");
1.172 +}
1.173 +#endif
1.174 +#endif
