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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 Chrysalide. If not, see <http://www.gnu.org/licenses/>.
*/
@title SMUSD
@id 190
@desc {
Signed Multiply Subtract Dual performs two signed 16 × 16-bit multiplications. It subtracts one of the products from the other, and writes the result to the destination register. Optionally, the instruction can exchange the halfwords of the second operand before performing the arithmetic. This produces top × bottom and bottom × top multiplication. Overflow cannot occur.
}
@encoding (T1) {
@word 1 1 1 1 1 0 1 1 0 1 0 0 Rn(4) 1 1 1 1 Rd(4) 0 0 0 M(1) Rm(4)
@syntax {
@subid 501
@assert {
M == 0
}
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
}
@asm smusd ?reg_D reg_N reg_M
}
@syntax {
@subid 502
@assert {
M == 1
}
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
}
@asm smusdx ?reg_D reg_N reg_M
}
}
@encoding (A1) {
@word cond(4) 0 1 1 1 0 0 0 0 Rd(4) 1 1 1 1 Rm(4) 0 1 M(1) 1 Rn(4)
@syntax {
@subid 503
@assert {
M == 0
}
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
}
@asm smusd ?reg_D reg_N reg_M
@rules {
check g_arm_instruction_set_cond(cond)
}
}
@syntax {
@subid 504
@assert {
M == 1
}
@conv {
reg_D = Register(Rd)
reg_N = Register(Rn)
reg_M = Register(Rm)
}
@asm smusdx ?reg_D reg_N reg_M
@rules {
check g_arm_instruction_set_cond(cond)
}
}
}
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