diff options
Diffstat (limited to 'crypto/ec/curve448/arch_64/f_impl.c')
-rw-r--r-- | crypto/ec/curve448/arch_64/f_impl.c | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/crypto/ec/curve448/arch_64/f_impl.c b/crypto/ec/curve448/arch_64/f_impl.c new file mode 100644 index 0000000000..7cb5749cda --- /dev/null +++ b/crypto/ec/curve448/arch_64/f_impl.c @@ -0,0 +1,308 @@ +/* + * Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved. + * Copyright 2014 Cryptography Research, Inc. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + * + * Originally written by Mike Hamburg + */ +#include "field.h" + +void gf_mul(gf_s * __restrict__ cs, const gf as, const gf bs) +{ + const uint64_t *a = as->limb, *b = bs->limb; + uint64_t *c = cs->limb; + __uint128_t accum0 = 0, accum1 = 0, accum2; + uint64_t mask = (1ull << 56) - 1; + uint64_t aa[4], bb[4], bbb[4]; + unsigned int i; + + for (i = 0; i < 4; i++) { + aa[i] = a[i] + a[i + 4]; + bb[i] = b[i] + b[i + 4]; + bbb[i] = bb[i] + b[i + 4]; + } + + int I_HATE_UNROLLED_LOOPS = 0; + + if (I_HATE_UNROLLED_LOOPS) { + /* + * The compiler probably won't unroll this, so it's like 80% slower. + */ + for (i = 0; i < 4; i++) { + accum2 = 0; + + unsigned int j; + for (j = 0; j <= i; j++) { + accum2 += widemul(a[j], b[i - j]); + accum1 += widemul(aa[j], bb[i - j]); + accum0 += widemul(a[j + 4], b[i - j + 4]); + } + for (; j < 4; j++) { + accum2 += widemul(a[j], b[i - j + 8]); + accum1 += widemul(aa[j], bbb[i - j + 4]); + accum0 += widemul(a[j + 4], bb[i - j + 4]); + } + + accum1 -= accum2; + accum0 += accum2; + + c[i] = ((uint64_t)(accum0)) & mask; + c[i + 4] = ((uint64_t)(accum1)) & mask; + + accum0 >>= 56; + accum1 >>= 56; + } + } else { + accum2 = widemul(a[0], b[0]); + accum1 += widemul(aa[0], bb[0]); + accum0 += widemul(a[4], b[4]); + + accum2 += widemul(a[1], b[7]); + accum1 += widemul(aa[1], bbb[3]); + accum0 += widemul(a[5], bb[3]); + + accum2 += widemul(a[2], b[6]); + accum1 += widemul(aa[2], bbb[2]); + accum0 += widemul(a[6], bb[2]); + + accum2 += widemul(a[3], b[5]); + accum1 += widemul(aa[3], bbb[1]); + accum0 += widemul(a[7], bb[1]); + + accum1 -= accum2; + accum0 += accum2; + + c[0] = ((uint64_t)(accum0)) & mask; + c[4] = ((uint64_t)(accum1)) & mask; + + accum0 >>= 56; + accum1 >>= 56; + + accum2 = widemul(a[0], b[1]); + accum1 += widemul(aa[0], bb[1]); + accum0 += widemul(a[4], b[5]); + + accum2 += widemul(a[1], b[0]); + accum1 += widemul(aa[1], bb[0]); + accum0 += widemul(a[5], b[4]); + + accum2 += widemul(a[2], b[7]); + accum1 += widemul(aa[2], bbb[3]); + accum0 += widemul(a[6], bb[3]); + + accum2 += widemul(a[3], b[6]); + accum1 += widemul(aa[3], bbb[2]); + accum0 += widemul(a[7], bb[2]); + + accum1 -= accum2; + accum0 += accum2; + + c[1] = ((uint64_t)(accum0)) & mask; + c[5] = ((uint64_t)(accum1)) & mask; + + accum0 >>= 56; + accum1 >>= 56; + + accum2 = widemul(a[0], b[2]); + accum1 += widemul(aa[0], bb[2]); + accum0 += widemul(a[4], b[6]); + + accum2 += widemul(a[1], b[1]); + accum1 += widemul(aa[1], bb[1]); + accum0 += widemul(a[5], b[5]); + + accum2 += widemul(a[2], b[0]); + accum1 += widemul(aa[2], bb[0]); + accum0 += widemul(a[6], b[4]); + + accum2 += widemul(a[3], b[7]); + accum1 += widemul(aa[3], bbb[3]); + accum0 += widemul(a[7], bb[3]); + + accum1 -= accum2; + accum0 += accum2; + + c[2] = ((uint64_t)(accum0)) & mask; + c[6] = ((uint64_t)(accum1)) & mask; + + accum0 >>= 56; + accum1 >>= 56; + + accum2 = widemul(a[0], b[3]); + accum1 += widemul(aa[0], bb[3]); + accum0 += widemul(a[4], b[7]); + + accum2 += widemul(a[1], b[2]); + accum1 += widemul(aa[1], bb[2]); + accum0 += widemul(a[5], b[6]); + + accum2 += widemul(a[2], b[1]); + accum1 += widemul(aa[2], bb[1]); + accum0 += widemul(a[6], b[5]); + + accum2 += widemul(a[3], b[0]); + accum1 += widemul(aa[3], bb[0]); + accum0 += widemul(a[7], b[4]); + + accum1 -= accum2; + accum0 += accum2; + + c[3] = ((uint64_t)(accum0)) & mask; + c[7] = ((uint64_t)(accum1)) & mask; + + accum0 >>= 56; + accum1 >>= 56; + } /* !I_HATE_UNROLLED_LOOPS */ + + accum0 += accum1; + accum0 += c[4]; + accum1 += c[0]; + c[4] = ((uint64_t)(accum0)) & mask; + c[0] = ((uint64_t)(accum1)) & mask; + + accum0 >>= 56; + accum1 >>= 56; + + c[5] += ((uint64_t)(accum0)); + c[1] += ((uint64_t)(accum1)); +} + +void gf_mulw_unsigned(gf_s * __restrict__ cs, const gf as, uint32_t b) +{ + const uint64_t *a = as->limb; + uint64_t *c = cs->limb; + __uint128_t accum0 = 0, accum4 = 0; + uint64_t mask = (1ull << 56) - 1; + int i; + + for (i = 0; i < 4; i++) { + accum0 += widemul(b, a[i]); + accum4 += widemul(b, a[i + 4]); + c[i] = accum0 & mask; + accum0 >>= 56; + c[i + 4] = accum4 & mask; + accum4 >>= 56; + } + + accum0 += accum4 + c[4]; + c[4] = accum0 & mask; + c[5] += accum0 >> 56; + + accum4 += c[0]; + c[0] = accum4 & mask; + c[1] += accum4 >> 56; +} + +void gf_sqr(gf_s * __restrict__ cs, const gf as) +{ + const uint64_t *a = as->limb; + uint64_t *c = cs->limb; + __uint128_t accum0 = 0, accum1 = 0, accum2; + uint64_t mask = (1ull << 56) - 1; + uint64_t aa[4]; + + /* For some reason clang doesn't vectorize this without prompting? */ + unsigned int i; + for (i = 0; i < 4; i++) { + aa[i] = a[i] + a[i + 4]; + } + + accum2 = widemul(a[0], a[3]); + accum0 = widemul(aa[0], aa[3]); + accum1 = widemul(a[4], a[7]); + + accum2 += widemul(a[1], a[2]); + accum0 += widemul(aa[1], aa[2]); + accum1 += widemul(a[5], a[6]); + + accum0 -= accum2; + accum1 += accum2; + + c[3] = ((uint64_t)(accum1)) << 1 & mask; + c[7] = ((uint64_t)(accum0)) << 1 & mask; + + accum0 >>= 55; + accum1 >>= 55; + + accum0 += widemul(2 * aa[1], aa[3]); + accum1 += widemul(2 * a[5], a[7]); + accum0 += widemul(aa[2], aa[2]); + accum1 += accum0; + + accum0 -= widemul(2 * a[1], a[3]); + accum1 += widemul(a[6], a[6]); + + accum2 = widemul(a[0], a[0]); + accum1 -= accum2; + accum0 += accum2; + + accum0 -= widemul(a[2], a[2]); + accum1 += widemul(aa[0], aa[0]); + accum0 += widemul(a[4], a[4]); + + c[0] = ((uint64_t)(accum0)) & mask; + c[4] = ((uint64_t)(accum1)) & mask; + + accum0 >>= 56; + accum1 >>= 56; + + accum2 = widemul(2 * aa[2], aa[3]); + accum0 -= widemul(2 * a[2], a[3]); + accum1 += widemul(2 * a[6], a[7]); + + accum1 += accum2; + accum0 += accum2; + + accum2 = widemul(2 * a[0], a[1]); + accum1 += widemul(2 * aa[0], aa[1]); + accum0 += widemul(2 * a[4], a[5]); + + accum1 -= accum2; + accum0 += accum2; + + c[1] = ((uint64_t)(accum0)) & mask; + c[5] = ((uint64_t)(accum1)) & mask; + + accum0 >>= 56; + accum1 >>= 56; + + accum2 = widemul(aa[3], aa[3]); + accum0 -= widemul(a[3], a[3]); + accum1 += widemul(a[7], a[7]); + + accum1 += accum2; + accum0 += accum2; + + accum2 = widemul(2 * a[0], a[2]); + accum1 += widemul(2 * aa[0], aa[2]); + accum0 += widemul(2 * a[4], a[6]); + + accum2 += widemul(a[1], a[1]); + accum1 += widemul(aa[1], aa[1]); + accum0 += widemul(a[5], a[5]); + + accum1 -= accum2; + accum0 += accum2; + + c[2] = ((uint64_t)(accum0)) & mask; + c[6] = ((uint64_t)(accum1)) & mask; + + accum0 >>= 56; + accum1 >>= 56; + + accum0 += c[3]; + accum1 += c[7]; + c[3] = ((uint64_t)(accum0)) & mask; + c[7] = ((uint64_t)(accum1)) & mask; + + /* we could almost stop here, but it wouldn't be stable, so... */ + + accum0 >>= 56; + accum1 >>= 56; + c[4] += ((uint64_t)(accum0)) + ((uint64_t)(accum1)); + c[0] += ((uint64_t)(accum1)); +} |