--- /dev/null
+/* shabal256-asm.S */
+/*
+ This file is part of the AVR-Crypto-Lib.
+ Copyright (C) 2009 Daniel Otte (daniel.otte@rub.de)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+/*
+ * \file shabal256-asm.S
+ * \author Daniel Otte
+ * \email daniel.otte@rub.de
+ * \date 2009-04-27
+ * \license GPLv3 or later
+ */
+
+#include "avr-asm-macros.S"
+
+/******************************************************************************/
+
+shabal256_iv:
+ /* A */
+.long 0x52F84552, 0xE54B7999, 0x2D8EE3EC, 0xB9645191
+.long 0xE0078B86, 0xBB7C44C9, 0xD2B5C1CA, 0xB0D2EB8C
+.long 0x14CE5A45, 0x22AF50DC, 0xEFFDBC6B, 0xEB21B74A
+ /* B */
+.long 0xB555C6EE, 0x3E710596, 0xA72A652F, 0x9301515F
+.long 0xDA28C1FA, 0x696FD868, 0x9CB6BF72, 0x0AFE4002
+.long 0xA6E03615, 0x5138C1D4, 0xBE216306, 0xB38B8890
+.long 0x3EA8B96B, 0x3299ACE4, 0x30924DD4, 0x55CB34A5
+ /* C */
+.long 0xB405F031, 0xC4233EBA, 0xB3733979, 0xC0DD9D55
+.long 0xC51C28AE, 0xA327B8E1, 0x56C56167, 0xED614433
+.long 0x88B59D60, 0x60E2CEBA, 0x758B4B8B, 0x83E82A7F
+.long 0xBC968828, 0xE6E00BF7, 0xBA839E55, 0x9B491C60
+
+/******************************************************************************/
+/*
+ * param ctx: r24,r25
+ */
+.global shabal256_init
+shabal256_init:
+ movw r26, r24
+ ldi r24, 1
+ st X+, r24
+ st X+, r1
+ st X+, r1
+ st X+, r1
+ st X+, r1
+ st X+, r1
+ st X+, r1
+ st X+, r1
+ movw r24, r26
+ adiw r24, 12*4+4
+ st X+, r24
+ st X+, r25
+ adiw r24, 4*16-1
+ adiw r24, 1
+ st X+, r24
+ st X+, r25
+ ldi r24, (12+16+16)
+ ldi r30, lo8(shabal256_iv)
+ ldi r31, hi8(shabal256_iv)
+1: lpm r0, Z+
+ st X+, r0
+ lpm r0, Z+
+ st X+, r0
+ lpm r0, Z+
+ st X+, r0
+ lpm r0, Z+
+ st X+, r0
+ dec r24
+ brne 1b
+ ret
+
+/******************************************************************************/
+
+.global shabal256_ctx2hash
+shabal256_ctx2hash:
+ movw r26, r24
+ movw r30, r22
+ ldd r24, Z+(8+2)
+ ldd r25, Z+(8+2+1)
+ movw r30, r24
+ adiw r30, (16-256/32)*4
+ ldi r24, 256/8
+1: ld r0, Z+
+ st X+, r0
+ dec r24
+ brne 1b
+ ret
+
+/******************************************************************************/
+/*
+ * param dest: r24:r25
+ * param msg: r22:r23
+ * param length_b: r18:r21
+ */
+DST0 = 8
+DST1 = 9
+CTX0 = 10
+CTX1 = 11
+MSG0 = 12
+MSG1 = 13
+LEN2 = 14
+LEN3 = 15
+LEN0 = 16
+LEN1 = 17
+.global shabal256
+shabal256:
+ push_range 8, 17
+ stack_alloc_large 188
+ adiw r30, 1 /* Z points to stack space (ctx) */
+ movw CTX0, r30
+ movw DST0, r24
+ movw MSG0, r22
+ movw LEN0, r18
+ movw LEN2, r20
+ movw r24, r30
+ rcall shabal256_init
+2:
+ tst LEN2
+ brne 3f
+ tst LEN3
+ breq 4f
+3:
+ movw r24, CTX0
+ movw r22, MSG0
+ rcall shabal_nextBlock
+ subi LEN1, 0x02
+ sbc LEN2, r1
+ sbc LEN3, r1
+ ldi r18, 64
+ add MSG0, r18
+ adc MSG1, r1
+ rjmp 2b
+4:
+ movw r24, CTX0
+ movw r22, MSG0
+ movw r20, LEN0
+ rcall shabal_lastBlock
+ movw r24, DST0
+ movw r22, CTX0
+ rcall shabal256_ctx2hash
+ stack_free_large2 188
+ pop_range 8, 17
+ ret
+
+