diff options
Diffstat (limited to 'security/nss/lib/freebl/mpi/mpi_arm.c')
| -rw-r--r-- | security/nss/lib/freebl/mpi/mpi_arm.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/mpi/mpi_arm.c b/security/nss/lib/freebl/mpi/mpi_arm.c new file mode 100644 index 000000000..b5139f28d --- /dev/null +++ b/security/nss/lib/freebl/mpi/mpi_arm.c @@ -0,0 +1,175 @@ +/* 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 inlined version is for 32-bit ARM platform only */ + +#if !defined(__arm__) +#error "This is for ARM only" +#endif + +/* 16-bit thumb doesn't work inlined assember version */ +#if (!defined(__thumb__) || defined(__thumb2__)) && !defined(__ARM_ARCH_3__) + +#include "mpi-priv.h" + +#ifdef MP_ASSEMBLY_MULTIPLY +void +s_mpv_mul_d(const mp_digit *a, mp_size a_len, mp_digit b, mp_digit *c) +{ + __asm__ __volatile__( + "mov r5, #0\n" +#ifdef __thumb2__ + "cbz %1, 2f\n" +#else + "cmp %1, r5\n" /* r5 is 0 now */ + "beq 2f\n" +#endif + + "1:\n" + "mov r4, #0\n" + "ldr r6, [%0], #4\n" + "umlal r5, r4, r6, %2\n" + "str r5, [%3], #4\n" + "mov r5, r4\n" + + "subs %1, #1\n" + "bne 1b\n" + + "2:\n" + "str r5, [%3]\n" + : + : "r"(a), "r"(a_len), "r"(b), "r"(c) + : "memory", "cc", "%r4", "%r5", "%r6"); +} + +void +s_mpv_mul_d_add(const mp_digit *a, mp_size a_len, mp_digit b, mp_digit *c) +{ + __asm__ __volatile__( + "mov r5, #0\n" +#ifdef __thumb2__ + "cbz %1, 2f\n" +#else + "cmp %1, r5\n" /* r5 is 0 now */ + "beq 2f\n" +#endif + + "1:\n" + "mov r4, #0\n" + "ldr r6, [%3]\n" + "adds r5, r6\n" + "adc r4, r4, #0\n" + + "ldr r6, [%0], #4\n" + "umlal r5, r4, r6, %2\n" + "str r5, [%3], #4\n" + "mov r5, r4\n" + + "subs %1, #1\n" + "bne 1b\n" + + "2:\n" + "str r5, [%3]\n" + : + : "r"(a), "r"(a_len), "r"(b), "r"(c) + : "memory", "cc", "%r4", "%r5", "%r6"); +} + +void +s_mpv_mul_d_add_prop(const mp_digit *a, mp_size a_len, mp_digit b, mp_digit *c) +{ + if (!a_len) + return; + + __asm__ __volatile__( + "mov r5, #0\n" + + "1:\n" + "mov r4, #0\n" + "ldr r6, [%3]\n" + "adds r5, r6\n" + "adc r4, r4, #0\n" + "ldr r6, [%0], #4\n" + "umlal r5, r4, r6, %2\n" + "str r5, [%3], #4\n" + "mov r5, r4\n" + + "subs %1, #1\n" + "bne 1b\n" + +#ifdef __thumb2__ + "cbz r4, 3f\n" +#else + "cmp r4, #0\n" + "beq 3f\n" +#endif + + "2:\n" + "mov r4, #0\n" + "ldr r6, [%3]\n" + "adds r5, r6\n" + "adc r4, r4, #0\n" + "str r5, [%3], #4\n" + "movs r5, r4\n" + "bne 2b\n" + + "3:\n" + : + : "r"(a), "r"(a_len), "r"(b), "r"(c) + : "memory", "cc", "%r4", "%r5", "%r6"); +} +#endif + +#ifdef MP_ASSEMBLY_SQUARE +void +s_mpv_sqr_add_prop(const mp_digit *pa, mp_size a_len, mp_digit *ps) +{ + if (!a_len) + return; + + __asm__ __volatile__( + "mov r3, #0\n" + + "1:\n" + "mov r4, #0\n" + "ldr r6, [%0], #4\n" + "ldr r5, [%2]\n" + "adds r3, r5\n" + "adc r4, r4, #0\n" + "umlal r3, r4, r6, r6\n" /* w = r3:r4 */ + "str r3, [%2], #4\n" + + "ldr r5, [%2]\n" + "adds r3, r4, r5\n" + "mov r4, #0\n" + "adc r4, r4, #0\n" + "str r3, [%2], #4\n" + "mov r3, r4\n" + + "subs %1, #1\n" + "bne 1b\n" + +#ifdef __thumb2__ + "cbz r3, 3f\n" +#else + "cmp r3, #0\n" + "beq 3f\n" +#endif + + "2:\n" + "mov r4, #0\n" + "ldr r5, [%2]\n" + "adds r3, r5\n" + "adc r4, r4, #0\n" + "str r3, [%2], #4\n" + "movs r3, r4\n" + "bne 2b\n" + + "3:" + : + : "r"(pa), "r"(a_len), "r"(ps) + : "memory", "cc", "%r3", "%r4", "%r5", "%r6"); +} +#endif +#endif |