clean up

[avr-crypto-lib.git] / dsa / bigint_add_u.S

diff --git a/dsa/bigint_add_u.S b/dsa/bigint_add_u.S
deleted file mode 100644 (file)
index 7c34f1a..0000000
--- a/dsa/bigint_add_u.S
+++ /dev/null
@@ -1,137 +0,0 @@
-/* bigint_add_u.S */
-/*
-    This file is part of the AVR-Crypto-Lib.
-    Copyright (C) 2010 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     bigint_add_u.S
- * \email    daniel.otte@rub.de
- * \author   Daniel Otte
- * \date     2010-03-01
- * \license  GPLv3 or later
- *
- */
-
-#include "avr-asm-macros.S"
-
-/*
- param dest: r24:r25
- param a:    r22:r23
- param b:    r20:r21
-*/
-LEN_A_0 = 22
-LEN_A_1 = 23
-LEN_B_0 = 20
-LEN_B_1 = 21
-
-
-.global bigint_add_u
-bigint_add_u:
-       push_range 28, 29
-       push_range 24, 25
-       movw r26, r24 ; X is our destination pointer
-       movw r30, r22 ; Z = a
-       movw r28, r20 ; Y = b
-       ldd LEN_A_0, Z+0
-       ldd LEN_A_1, Z+1
-       ldd LEN_B_0, Y+0
-       ldd LEN_B_1, Y+1
-       cp LEN_A_0, LEN_B_0
-       cpc LEN_A_1, LEN_B_1
-       brsh 3f
-       movw r18, LEN_A_0    ; swap length values
-       movw LEN_A_0, LEN_B_0
-       movw LEN_B_0, r18
-       movw r18, r30        ; swap pointers
-       movw r30, r28
-       movw r28, r18
-3:     ; now a is the longer integer
-    movw r24, LEN_A_0
-    adiw r24, 0
-    brne 4f
-    st X+, r1 ; store length
-    st X+, r1
-    st X+, r1 ; store 0 in info field
-    rjmp 9f
-4:
-    adiw r24, 1
-    st X+, r24 ; store length
-    st X+, r25
-    st X+, r1 ; store 0 in info field
-    ld r18, X+
-    ld r19, X+
-    movw r26, r18
-    adiw r30, 3 ; adjust pointers to point at wordv
-    ld r18, Z+
-    ld r19, Z+
-    movw r30, r18
-    adiw r28, 3
-    ld r18, Y+
-    ld r19, Y+
-    movw r28, r18
-
-    sub LEN_A_0, LEN_B_0
-    sbc LEN_A_1, LEN_B_1
-    movw r24, LEN_B_0
-    clr r0
-    adiw r24, 0
-    breq 6f
-    clc
-5:
-    ld r0, Z+
-    ld r1, Y+
-    adc r0, r1
-    st X+, r0
-    dec r24
-       brne 5b
-       rol r0 ; store carry bit
-       tst r25
-       breq 6f
-       dec r25
-       dec r24
-       ror r0 ; write carry back
-       rjmp 5b
-6: /* the main part is done */
-       movw r24, LEN_A_0
-       clr r1
-       adiw r24, 0
-       breq 8f
-62:
-       ror r0 ; write carry back
-7:
-    ld r0, Z+
-    adc r0, r1
-    st X+, r0
-    dec r24
-       brne 7b
-       rol r0 ; store carry bit
-       tst r25
-       breq 8f
-       dec r25
-       dec r24
-       rjmp 62b
-8:
-       ror r0
-       clr r0
-       rol r0
-       st X+, r0
-9:
-       pop_range 24, 25
-       pop_range 28, 29
-       jmp bigint_adjust
-
-