/* 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 SMLALD

@desc Signed Multiply Accumulate Long Dual performs two signed 16 × 16-bit multiplications. It adds the products to a 64-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. Overflow is possible during this instruction, but only as a result of the 64-bit addition. This overflow is not detected if it occurs. Instead, the result wraps around modulo 264.

@encoding (T1) {

	@word 1 1 1 1 1 0 1 1 1 1 0 0 Rn(4) RdLo(4) RdHi(4) 1 1 0 M(1) Rm(4)

	@syntax <reg_DLO> <reg_DHI> <reg_N> <reg_M>

	@conv {

		reg_DLO = Register(RdLo)
		reg_DHI = Register(RdHi)
		reg_N = Register(Rn)
		reg_M = Register(Rm)
		m_swap = (M == '1')

	}

	@rules {

		if (m_swap); chk_call ExtendKeyword("x")

	}

}

@encoding (A1) {

	@word cond(4) 0 1 1 1 0 1 0 0 RdHi(4) RdLo(4) Rm(4) 0 0 M(1) 1 Rn(4)

	@syntax <reg_DLO> <reg_DHI> <reg_N> <reg_M>

	@conv {

		reg_DLO = Register(RdLo)
		reg_DHI = Register(RdHi)
		reg_N = Register(Rn)
		reg_M = Register(Rm)
		m_swap = (M == '1')

	}

	@rules {

		if (m_swap); chk_call ExtendKeyword("x")
		chk_call StoreCondition(cond)

	}

}