45 lines
1.1 KiB
ArmAsm
45 lines
1.1 KiB
ArmAsm
/* xchg.S */
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/*
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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.global xchg32_array
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xchg32_array:
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movw r26, r24
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movw r30, r22
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1:
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ld r24, X
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ld r25, Z
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st X+, r25
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st Z+, r24
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ld r24, X
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ld r25, Z
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st X+, r25
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st Z+, r24
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ld r24, X
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ld r25, Z
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st X+, r25
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st Z+, r24
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ld r24, X
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ld r25, Z
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st X+, r25
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st Z+, r24
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dec r20
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brne 1b
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ret
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