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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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
@title RSB (register)
@id 152
@desc {
Reverse Subtract (register) subtracts a register value from an optionally-shifted register value, and writes the result to the destination register. It can optionally update the condition flags based on the result.
}
@encoding (T1) {
@word 1 1 1 0 1 0 1 1 1 1 0 S(1) Rn(4) 0 imm3(3) Rd(4) imm2(2) type(2) Rm(4)
@syntax {
@assert {
S == 0
}
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
shift = DecodeImmShift(type, imm3:imm2)
}
@asm rsb ?reg_D reg_N reg_M ?shift
}
@syntax {
@assert {
S == 1
}
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
shift = DecodeImmShift(type, imm3:imm2)
}
@asm rsbs ?reg_D reg_N reg_M ?shift
}
}
@encoding (A1) {
@word cond(4) 0 0 0 0 0 1 1 S(1) Rn(4) Rd(4) imm5(5) type(2) 0 Rm(4)
@syntax {
@assert {
S == 0
}
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
shift = DecodeImmShift(type, imm5)
}
@asm rsb ?reg_D reg_N reg_M ?shift
@rules {
check g_arm_instruction_set_cond(cond)
}
}
@syntax {
@assert {
S == 1
}
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
shift = DecodeImmShift(type, imm5)
}
@asm rsbs ?reg_D reg_N reg_M ?shift
@rules {
check g_arm_instruction_set_cond(cond)
}
}
}
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