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/* Chrysalide - Outil d'analyse de fichiers binaires
* ##FILE## - traduction d'instructions ARMv7
*
* Copyright (C) 2015 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 SMLSD
@desc Signed Multiply Subtract Dual performs two signed 16 × 16-bit multiplications. It adds the difference of the products to a 32-bit accumulate operand. Optionally, the instruction can exchange the halfwords of the second operand before performing the arithmetic. This produces top × bottom and bottom × top multiplication. This instruction sets the Q flag if the accumulate operation overflows. Overflow cannot occur during the multiplications or subtraction.
@encoding (T1) {
@word 1 1 1 1 1 0 1 1 0 1 0 0 Rn(4) Ra(4) Rd(4) 0 0 0 M(1) Rm(4)
@syntax <reg_D> <reg_N> <reg_M> <reg_A>
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
reg_A = Register(Ra)
m_swap = (M == '1')
}
@rules {
if (m_swap); chk_call ExtendKeyword("x")
}
}
@encoding (A1) {
@word cond(4) 0 1 1 1 0 0 0 0 Rd(4) Ra(4) Rm(4) 0 1 M(1) 1 Rn(4)
@syntax <reg_D> <reg_N> <reg_M> <reg_A>
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
reg_A = Register(Ra)
m_swap = (M == '1')
}
@rules {
if (m_swap); chk_call ExtendKeyword("x")
chk_call StoreCondition(cond)
}
}
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