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/* Chrysalide - Outil d'analyse de fichiers binaires
* ##FILE## - traduction d'instructions ARMv7
*
* Copyright (C) 2014 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 SUB (immediate, Thumb)
@encoding(t1) {
@half 0 0 0 1 1 1 1 imm3(3) Rn(3) Rd(3)
@syntax <Rd> <Rn> <const>
@conv {
Rd = Register(Rd)
Rn = Register(Rn)
const = ZeroExtend(imm3, 3, 32);
}
@rules {
//setflags = !InITBlock();
}
}
@encoding(t2) {
@half 0 0 1 1 1 Rdn(3) imm8(8)
@syntax <Rdn> <const>
@conv {
Rdn = Register(Rdn)
const = ZeroExtend(imm8, 8, 32);
}
@rules {
//setflags = !InITBlock();
}
}
@encoding(T3) {
@word 1 1 1 1 0 i(1) 0 1 1 0 1 S(1) Rn(4) 0 imm3(3) Rd(4) imm8(8)
@syntax {S} ".W" <Rd> <Rn> <const>
@conv {
S = SetFlags(S)
Rd = Register(Rd)
Rn = Register(Rn)
const = ThumbExpandImm_C(i:imm3:imm8, i)
}
@rules {
//if Rd == '1111' && S == '1' then SEE CMP (immediate);
//if Rn == '1101' then SEE SUB (SP minus immediate);
//if d == 13 || (d == 15 && S == '0') || n == 15 then UNPREDICTABLE;
}
}
@encoding(T4) {
@word 1 1 1 1 0 i(1) 1 0 1 0 1 0 Rn(4) 0 imm3(3) Rd(4) imm8(8)
@syntax "subw" <Rd> <Rn> <const>
@conv {
Rd = Register(Rd)
Rn = Register(Rn)
const = ZeroExtend(i:imm3:imm8, 12, 32)
}
@rules {
//if Rn == '1111' then SEE ADR;
//if Rn == '1101' then SEE SUB (SP minus immediate);
//if d IN {13,15} then UNPREDICTABLE;
}
}
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