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VQDMLSL

Vector Saturating Doubling Multiply Subtract Long multiplies corresponding elements in two doubleword vectors, subtracts double the products from corresponding elements of a quadword vector, and places the results in the same quadword vector.

The second operand can be a scalar instead of a vector. For more information about scalars see Advanced SIMD scalars.

If any of the results overflow, they are saturated. The cumulative saturation bit, FPSCR.QC, is set if saturation occurs. For details see Pseudocode details of saturation.

Depending on settings in the CPACR, NSACR, and HCPTR registers, and the Security state and PE mode in which the instruction is executed, an attempt to execute the instruction might be UNDEFINED, or trapped to Hyp mode. For more information see Enabling Advanced SIMD and floating-point support.

It has encodings from the following instruction sets: A32 ( A1 and A2 ) and T32 ( T1 and T2 ) .

A1

Decode for this encoding

if size == '11' then See("Related encodings"); end; if size == '00' || Vd[0] == '1' then Undefined(); end; let add : boolean = (op == '0'); let scalar_form : boolean = FALSE; let d : integer = UInt(D::Vd); let n : integer = UInt(N::Vn); let m : integer = UInt(M::Vm); let esize : integer{} = 8 << UInt(size); let elements : integer = 64 DIV esize; let index : integer = ARBITRARY : integer;

A2

Decode for this encoding

if size == '11' then See("Related encodings"); end; if size == '00' || Vd[0] == '1' then Undefined(); end; let add : boolean = (op == '0'); let scalar_form : boolean = TRUE; let d : integer = UInt(D::Vd); let n : integer = UInt(N::Vn); let m : integer = if size == '01' then UInt(Vm[2:0]) else UInt(Vm); let index : integer = if size == '01' then UInt(M::Vm[3]) else UInt(M); let esize : integer{} = 8 << UInt(size); let elements : integer = 64 DIV esize;

T1

Decode for this encoding

if size == '11' then See("Related encodings"); end; if size == '00' || Vd[0] == '1' then Undefined(); end; let add : boolean = (op == '0'); let scalar_form : boolean = FALSE; let d : integer = UInt(D::Vd); let n : integer = UInt(N::Vn); let m : integer = UInt(M::Vm); let esize : integer{} = 8 << UInt(size); let elements : integer = 64 DIV esize; let index : integer = ARBITRARY : integer;

T2

Decode for this encoding

if size == '11' then See("Related encodings"); end; if size == '00' || Vd[0] == '1' then Undefined(); end; let add : boolean = (op == '0'); let scalar_form : boolean = TRUE; let d : integer = UInt(D::Vd); let n : integer = UInt(N::Vn); let m : integer = if size == '01' then UInt(Vm[2:0]) else UInt(Vm); let index : integer = if size == '01' then UInt(M::Vm[3]) else UInt(M); let esize : integer{} = 8 << UInt(size); let elements : integer = 64 DIV esize;

Assembler Symbols