VMUL (by scalar)

Vector Multiply multiplies each element in a vector by a scalar, and places the results in a second vector.

For more information about scalars see Advanced SIMD scalars.

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 T32 ( T1 ) .

A1

if size == '11' then SEE "Related encodings"; if size == '00' || (F == '1' && size == '01' && !IsFeatureImplemented(FEAT_FP16)) then UNDEFINED; if Q == '1' && (Vd<0> == '1' || Vn<0> == '1') then UNDEFINED; constant unsigned = FALSE; // "Don't care" value: TRUE produces same functionality constant floating_point = (F == '1'); constant long_destination = FALSE; constant d = UInt(D:Vd); constant n = UInt(N:Vn); constant regs = if Q == '0' then 1 else 2; constant integer esize = 8 << UInt(size); constant integer elements = 64 DIV esize; integer m; integer index; if size == '01' then m = UInt(Vm<2:0>); index = UInt(M:Vm<3>); if size == '10' then m = UInt(Vm); index = UInt(M);

T1

if size == '11' then SEE "Related encodings"; if F == '1' && size == '01' && InITBlock() then UNPREDICTABLE; if size == '00' || (F == '1' && size == '01' && !IsFeatureImplemented(FEAT_FP16)) then UNDEFINED; if Q == '1' && (Vd<0> == '1' || Vn<0> == '1') then UNDEFINED; constant unsigned = FALSE; // "Don't care" value: TRUE produces same functionality constant floating_point = (F == '1'); constant long_destination = FALSE; constant d = UInt(D:Vd); constant n = UInt(N:Vn); constant regs = if Q == '0' then 1 else 2; constant integer esize = 8 << UInt(size); constant integer elements = 64 DIV esize; integer m; integer index; if size == '01' then m = UInt(Vm<2:0>); index = UInt(M:Vm<3>); if size == '10' then m = UInt(Vm); index = UInt(M);

CONSTRAINED UNPREDICTABLE behavior

If F == '1' && size == '01' && InITBlock(), then one of the following behaviors must occur:

• The instruction is undefined.
• The instruction executes as if it passes the Condition code check.
• The instruction executes as NOP. This means it behaves as if it fails the Condition code check.

Assembler Symbols