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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 RSB (register-shifted register)
@id 149
@desc {
Reverse Subtract (register-shifted register) subtracts a register value from a register-shifted register value, and writes the result to the destination register. It can optionally update the condition flags based on the result.
}
@encoding (A1) {
@word cond(4) 0 0 0 0 0 1 1 S(1) Rn(4) Rd(4) Rs(4) 0 type(2) 1 Rm(4)
@syntax {
@subid 458
@assert {
S == 0
}
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
shift_t = UInt(type)
reg_S = Register(Rs)
shift = BuildRegShift(shift_t, reg_S)
}
@asm rsb ?reg_D reg_N reg_M shift
@rules {
check g_arm_instruction_set_cond(cond)
}
}
@syntax {
@subid 459
@assert {
S == 1
}
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
shift_t = UInt(type)
reg_S = Register(Rs)
shift = BuildRegShift(shift_t, reg_S)
}
@asm rsbs ?reg_D reg_N reg_M shift
@rules {
check g_arm_instruction_set_cond(cond)
}
}
}
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