--- /dev/null
+/* twister-big-asm.S */
+/*
+ This file is part of the Crypto-avr-lib/microcrypt-lib.
+ Copyright (C) 2008 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 twister-big-asm.S
+ * \email daniel.otte@rub.de
+ * \author Daniel Otte
+ * \date 2008-12-27
+ * \license GPLv3 or later
+ *
+ */
+
+ #include "avr-asm-macros.S"
+
+/* void checksum_update(twister_big_ctx_t* ctx, uint8_t col) */
+/*
+ * param ctx: r24:r25
+ * param col: r22
+ */
+checksum_update:
+ push r16
+ push r28
+ push r29
+ lsl r22
+ lsl r22
+ lsl r22
+ mov r16, r22
+ movw r30, r24 /* X points to ctx->state.s */
+
+ ldd r18, Z+7*8
+ ldd r19, Z+6*8
+ ldd r20, Z+5*8
+ ldd r21, Z+4*8
+ ldd r22, Z+3*8
+ ldd r23, Z+2*8
+ ldd r24, Z+1*8
+ ldd r25, Z+0*8
+
+ adiw r30, 63
+ adiw r30, 1+3*8 /* Z points at ctx->checksum[0][8] */
+ movw r28, r30 /* Y points at ctx->checksum[0][8] */
+ andi r16, 63
+ add r30, r16 /* Z points at ctx->checksum[col][8]*/
+ adc r31, r1
+ ldi r26, 8
+ add r16, r26
+ andi r16, 63
+ add r28, r16
+ adc r29, r1 /* Y points at ctx->checksum[(col+1)%8][8]*/
+
+ ld r0, -Y
+ add r18, r0
+ ld r0, -Z
+ eor r0, r18
+ st Z, r0
+
+ ld r0, -Y
+ adc r19, r0
+ ld r0, -Z
+ eor r0, r19
+ st Z, r0
+
+ ld r0, -Y
+ adc r20, r0
+ ld r0, -Z
+ eor r0, r20
+ st Z, r0
+
+ ld r0, -Y
+ adc r21, r0
+ ld r0, -Z
+ eor r0, r21
+ st Z, r0
+
+ ld r0, -Y
+ adc r22, r0
+ ld r0, -Z
+ eor r0, r22
+ st Z, r0
+
+ ld r0, -Y
+ adc r23, r0
+ ld r0, -Z
+ eor r0, r23
+ st Z, r0
+
+ ld r0, -Y
+ adc r24, r0
+ ld r0, -Z
+ eor r0, r24
+ st Z, r0
+
+ ld r0, -Y
+ adc r25, r0
+ ld r0, -Z
+ eor r0, r25
+ st Z, r0
+
+ pop r29
+ pop r28
+ pop r16
+ ret
+
+/*********************************************************************/
+/* void twister_big_init(twister_big_ctx_t* ctx, uint16_t hashsize_b)*/
+/*
+ * param ctx: r24:r25
+ * param hashsize_b: r22:r23
+ */
+.global twister384_init
+twister384_init:
+ ldi r22, lo8(384)
+ ldi r23, hi8(384)
+ rjmp twister_big_init
+
+.global twister512_init
+twister512_init:
+ ldi r22, lo8(512)
+ ldi r23, hi8(512)
+
+.global twister_big_init
+twister_big_init:
+ movw r30, r24
+ ldi r24, 64
+1:
+ st Z+, r1
+ dec r24
+ brne 1b
+
+ dec r1
+ ldi r24, 8
+1:
+ st Z+, r1
+ dec r24
+ brne 1b
+
+ inc r1
+ ldi r24, 8+64
+1:
+ st Z+, r1
+ dec r24
+ brne 1b
+
+ subi r30, lo8(1+8+8+8*7+64)
+ sbci r31, hi8(1+8+8+8*7+64)
+ st Z, r23
+ std Z+8, r22
+ ret
+
+/*********************************************************************/
+/* void twister_big_nextBlock(twister_state_t* ctx, void* msg) */
+/*
+ * param ctx: r24:r25
+ * param msg: r22:r23
+ */
+CTX_SAVE0 = 14
+CTX_SAVE1 = 15
+TMP_SAVE0 = 12
+TMP_SAVE1 = 13
+MSG_SAVE0 = 28
+MSG_SAVE1 = 29
+.global twister_big_nextBlock
+.global twister384_nextBlock
+.global twister512_nextBlock
+
+twister384_nextBlock:
+twister512_nextBlock:
+twister_big_nextBlock:
+ push_range 12, 15
+ push r28
+ push r29
+ stack_alloc_large 64
+ adiw r30, 1
+ movw TMP_SAVE0, r30
+ movw CTX_SAVE0, r24
+ movw MSG_SAVE0, r22
+ movw r26, CTX_SAVE0
+ ldi r18, 64/8
+1:
+ ld r0, X+
+ st Z+, r0
+ ld r0, X+
+ st Z+, r0
+ ld r0, X+
+ st Z+, r0
+ ld r0, X+
+ st Z+, r0
+ ld r0, X+
+ st Z+, r0
+ ld r0, X+
+ st Z+, r0
+ ld r0, X+
+ st Z+, r0
+ ld r0, X+
+ st Z+, r0
+ dec r18
+ brne 1b
+ /* maxi round 1 */
+ movw r24, CTX_SAVE0
+ ldi r22, 0
+ rcall checksum_update
+ movw r22, MSG_SAVE0
+ movw r24, CTX_SAVE0
+ rcall twister_mini_round
+
+ movw r24, CTX_SAVE0
+ ldi r22, 1
+ rcall checksum_update
+ adiw MSG_SAVE0, 8
+ movw r22, MSG_SAVE0
+ movw r24, CTX_SAVE0
+ rcall twister_mini_round
+
+ movw r24, CTX_SAVE0
+ ldi r22, 2
+ rcall checksum_update
+ adiw MSG_SAVE0, 8
+ movw r22, MSG_SAVE0
+ movw r24, CTX_SAVE0
+ rcall twister_mini_round
+
+ movw r30, TMP_SAVE0
+ movw r26, CTX_SAVE0
+ ldi r18, 64
+1:
+ ld r0, X
+ ld r23, Z
+ eor r0, r23
+ st X+, r0
+ st Z+, r0
+ dec r18
+ brne 1b
+ /* maxi round 2 */
+ movw r24, CTX_SAVE0
+ ldi r22, 3
+ rcall checksum_update
+ adiw MSG_SAVE0, 8
+ movw r22, MSG_SAVE0
+ movw r24, CTX_SAVE0
+ rcall twister_mini_round
+
+ movw r24, CTX_SAVE0
+ rcall twister_blank_round
+
+ movw r24, CTX_SAVE0
+ ldi r22, 4
+ rcall checksum_update
+ adiw MSG_SAVE0, 8
+ movw r22, MSG_SAVE0
+ movw r24, CTX_SAVE0
+ rcall twister_mini_round
+
+ movw r30, TMP_SAVE0
+ movw r26, CTX_SAVE0
+ ldi r18, 64
+1:
+ ld r0, X
+ ld r23, Z
+ eor r0, r23
+ st X+, r0
+ st Z+, r0
+ dec r18
+ brne 1b
+ /* maxi round 3 */
+ movw r24, CTX_SAVE0
+ ldi r22, 5
+ rcall checksum_update
+ adiw MSG_SAVE0, 8
+ movw r22, MSG_SAVE0
+ movw r24, CTX_SAVE0
+ rcall twister_mini_round
+
+ movw r24, CTX_SAVE0
+ ldi r22, 6
+ rcall checksum_update
+ adiw MSG_SAVE0, 8
+ movw r22, MSG_SAVE0
+ movw r24, CTX_SAVE0
+ rcall twister_mini_round
+
+ movw r24, CTX_SAVE0
+ ldi r22, 7
+ rcall checksum_update
+ adiw MSG_SAVE0, 8
+ movw r22, MSG_SAVE0
+ movw r24, CTX_SAVE0
+ rcall twister_mini_round
+
+ movw r24, CTX_SAVE0
+ rcall twister_blank_round
+
+ movw r30, TMP_SAVE0
+ movw r26, CTX_SAVE0
+ ldi r18, 64
+1:
+ ld r0, X
+ ld r23, Z+
+ eor r0, r23
+ st X+, r0
+ dec r18
+ brne 1b
+
+ adiw r26, 9
+ ldi r19, 2
+ ld r0, X
+ add r0, r19
+ st X+, r0
+
+ ld r0, X
+ adc r0, r1
+ st X+, r0
+ ld r0, X
+ adc r0, r1
+ st X+, r0
+ ld r0, X
+ adc r0, r1
+ st X+, r0
+ ld r0, X
+ adc r0, r1
+ st X+, r0
+ ld r0, X
+ adc r0, r1
+ st X+, r0
+ ld r0, X
+ adc r0, r1
+ st X+, r0
+ ld r0, X
+ adc r0, r1
+ st X+, r0
+
+ stack_free_large 64
+ pop r29
+ pop r28
+ pop_range 12, 15
+ ret
+
+/*********************************************************************/
+/* void twister_big_lastBlock(twister_state_t* ctx, void* msg, uint16_t length_b) */
+/*
+ * param ctx: r24:r25
+ * param msg: r22:r23
+ * param length_b: r20:r21
+ */
+TMP_SAVE0 = 12
+TMP_SAVE1 = 13
+CTX_SAVE0 = 14
+CTX_SAVE1 = 15
+LEN_SAVE0 = 16
+LEN_SAVE1 = 17
+MSG_SAVE0 = 28
+MSG_SAVE1 = 29
+.global twister_big_lastBlock
+.global twister384_lastBlock
+.global twister512_lastBlock
+
+twister384_lastBlock:
+twister512_lastBlock:
+twister_big_lastBlock:
+ push_range 12, 17
+ push r28
+ push r29
+ stack_alloc_large 64
+ adiw r30, 1
+ movw TMP_SAVE0, r30
+ movw CTX_SAVE0, r24
+ movw MSG_SAVE0, r22
+ movw LEN_SAVE0, r20
+1:
+ cpi LEN_SAVE1, 2
+ brmi 2f
+ movw r24, CTX_SAVE0
+ movw r22, MSG_SAVE0
+ rcall twister_big_nextBlock
+ adiw MSG_SAVE0, 8
+ subi LEN_SAVE1, 2
+ rjmp 1b
+2:
+ movw r18, LEN_SAVE0
+ lsr r19
+ ror r18
+ lsr r18
+ lsr r18
+ ldi r19, 63
+ movw r26, MSG_SAVE0
+ movw r30, TMP_SAVE0
+ ldi r20, 0x80
+ sub r19, r18 /* r18: bytes to copy, r19: bytes to clear */
+
+ ld r0, X+
+3:
+ tst r18
+ breq 4f
+ st Z+, r0
+ ld r0, X+
+ dec r18
+
+4:
+ mov r18, LEN_SAVE0
+ andi r18, 0x07
+ ldi r20, 0x80
+ breq 5f
+4:
+ lsr r20
+ dec r18
+ brne 4b
+ or r20, r0
+ rjmp 5f
+
+5:
+ st Z+, r20
+6:
+ st Z+, r1
+ dec r19
+ brne 6b
+
+ movw r24, CTX_SAVE0
+ movw r22, TMP_SAVE0
+ rcall twister_big_nextBlock
+
+ ldi r19, 2
+ clr r18
+
+ sub r18, LEN_SAVE0
+ sbc r19, LEN_SAVE1
+ movw r26, CTX_SAVE0
+ adiw r26, 63
+ adiw r26, 1+8
+
+ ld r0, X
+ sub r0, r18
+ st X+, r0
+ ld r0, X
+ sbc r0, r19
+ st X+, r0
+ ld r0, X
+ sbc r0, r1
+ st X+, r0
+ ld r0, X
+ sbc r0, r1
+ st X+, r0
+ ld r0, X
+ sbc r0, r1
+ st X+, r0
+ ld r0, X
+ sbc r0, r1
+ st X+, r0
+ ld r0, X
+ sbc r0, r1
+ st X+, r0
+ ld r0, X
+ sbc r0, r1
+ st X+, r0
+
+ sbiw r26, 8
+ movw r24, CTX_SAVE0
+ movw r22, r26
+ rcall twister_mini_round
+
+ movw r24, CTX_SAVE0
+ movw r22, CTX_SAVE0
+ ldi r16, 64+8+8
+ add r22, r16
+ adc r23, r1
+ movw r30, r22
+ ldi r26, 8
+1:
+ ld r12, Z+
+ ld r13, Z+
+ ld r16, Z+
+ ld r17, Z+
+ ld r18, Z+
+ ld r19, Z+
+ ld r20, Z+
+ ld r21, Z+
+ st -Z, r12
+ st -Z, r13
+ st -Z, r16
+ st -Z, r17
+ st -Z, r18
+ st -Z, r19
+ st -Z, r20
+ st -Z, r21
+ adiw r30, 8
+ dec r26
+ brne 1b
+
+ movw r24, CTX_SAVE0
+ movw r22, CTX_SAVE0
+ ldi r26, 64+2*8
+ add r22, r26
+ adc r23, r1
+ rcall twister_small_nextBlock
+
+ stack_free_large 64
+ pop r29
+ pop r28
+ pop_range 12, 17
+ ret
projects / avr-crypto-lib.git / blobdiff