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-
-/* Chrysalide - Outil d'analyse de fichiers binaires
- * ##FILE## - traduction d'instructions ARMv7
- *
- * Copyright (C) 2017 Cyrille Bagard
- *
- * This file is part of Chrysalide.
- *
- * Chrysalide 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.
- *
- * Chrysalide 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 Chrysalide. If not, see <http://www.gnu.org/licenses/>.
- */
-
-
-@title LDREX
-
-@id 74
-
-@desc {
-
- Load Register Exclusive calculates an address from a base register value and an immediate offset, loads a word from memory, writes it to a register and: • if the address has the Shared Memory attribute, marks the physical address as exclusive access for the executing processor in a global monitor • causes the executing processor to indicate an active exclusive access in the local monitor. For more information about support for shared memory see Synchronization and semaphores on page A3-114. For information about memory accesses see Memory accesses on page A8-294.
-
-}
-
-@encoding (T1) {
-
- @word 1 1 1 0 1 0 0 0 0 1 0 1 Rn(4) Rt(4) 1 1 1 1 imm8(8)
-
- @syntax {
-
- @subid 214
-
- @conv {
-
- reg_T = Register(Rt)
- reg_N = Register(Rn)
- imm32 = ZeroExtend(imm8:'00', 32)
- maccess = MemAccessOffset(reg_N, imm32)
-
- }
-
- @asm ldrex reg_T maccess
-
- }
-
-}
-
-@encoding (A1) {
-
- @word cond(4) 0 0 0 1 1 0 0 1 Rn(4) Rt(4) 1 1 1 1 1 0 0 1 1 1 1 1
-
- @syntax {
-
- @subid 215
-
- @conv {
-
- reg_T = Register(Rt)
- reg_N = Register(Rn)
- imm32 = Zeros(32)
- maccess = MemAccessOffset(reg_N, imm32)
-
- }
-
- @asm ldrex reg_T maccess
-
- @rules {
-
- check g_arm_instruction_set_cond(cond)
-
- }
-
- }
-
-}
-