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C nettle, low-level cryptographics library
C
C Copyright (C) 2013 Niels Möller
C
C The nettle library is free software; you can redistribute it and/or modify
C it under the terms of the GNU Lesser General Public License as published by
C the Free Software Foundation; either version 2.1 of the License, or (at your
C option) any later version.
C
C The nettle library is distributed in the hope that it will be useful, but
C WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
C or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
C License for more details.
C
C You should have received a copy of the GNU Lesser General Public License
C along with the nettle library; see the file COPYING.LIB. If not, write to
C the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
C MA 02111-1301, USA.
.file "ecc-192-modp.asm"
define(<RP>, <%rsi>)
define(<T0>, <%rdi>) C Overlaps unused ecc input
define(<T1>, <%rcx>)
define(<T2>, <%rdx>)
define(<T3>, <%r8>)
define(<H>, <%r9>)
define(<C1>, <%r10>)
define(<C2>, <%r11>)
C ecc_192_modp (const struct ecc_curve *ecc, mp_limb_t *rp)
.text
ALIGN(16)
PROLOGUE(nettle_ecc_192_modp)
W64_ENTRY(2, 0)
mov 16(RP), T2
mov 24(RP), T3
mov 40(RP), H
xor C1, C1
xor C2, C2
add H, T2
adc H, T3
C Carry to be added in at T1 and T2
setc LREG(C2)
mov 8(RP), T1
mov 32(RP), H
adc H, T1
adc H, T2
C Carry to be added in at T0 and T1
setc LREG(C1)
mov (RP), T0
adc T3, T0
adc T3, T1
adc $0, C2
C Add in C1 and C2
add C1, T1
adc C2, T2
setc LREG(C1)
C Fold final carry.
adc $0, T0
adc C1, T1
adc $0, T2
mov T0, (RP)
mov T1, 8(RP)
mov T2, 16(RP)
W64_EXIT(2, 0)
ret
EPILOGUE(nettle_ecc_192_modp)
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