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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 SMLSLD
@id 182
@desc {
Signed Multiply Subtract Long Dual performs two signed 16 × 16-bit multiplications. It adds the difference of 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 1 Rn(4) RdLo(4) RdHi(4) 1 1 0 M(1) Rm(4)
@syntax {
@assert {
M == 0
}
@conv {
reg_DLO = Register(RdLo)
reg_DHI = Register(RdHi)
reg_N = Register(Rn)
reg_M = Register(Rm)
}
@asm smlsld reg_DLO reg_DHI reg_N reg_M
}
@syntax {
@assert {
M == 1
}
@conv {
reg_DLO = Register(RdLo)
reg_DHI = Register(RdHi)
reg_N = Register(Rn)
reg_M = Register(Rm)
}
@asm smlsldx reg_DLO reg_DHI reg_N reg_M
}
}
@encoding (A1) {
@word cond(4) 0 1 1 1 0 1 0 0 RdHi(4) RdLo(4) Rm(4) 0 1 M(1) 1 Rn(4)
@syntax {
@assert {
M == 0
}
@conv {
reg_DLO = Register(RdLo)
reg_DHI = Register(RdHi)
reg_N = Register(Rn)
reg_M = Register(Rm)
}
@asm smlsld reg_DLO reg_DHI reg_N reg_M
@rules {
check g_arm_instruction_set_cond(cond)
}
}
@syntax {
@assert {
M == 1
}
@conv {
reg_DLO = Register(RdLo)
reg_DHI = Register(RdHi)
reg_N = Register(Rn)
reg_M = Register(Rm)
}
@asm smlsldx reg_DLO reg_DHI reg_N reg_M
@rules {
check g_arm_instruction_set_cond(cond)
}
}
}
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