MADD

This instruction multiplies two register values, adds a third register value, and writes the result to the destination register.

Decode (all encodings)

let d : integer{} = UInt(Rd); let n : integer{} = UInt(Rn); let m : integer{} = UInt(Rm); let a : integer{} = UInt(Ra); let datasize : integer{} = 32 << UInt(sf);

Assembler Symbols

<Wd>	Is the 32-bit name of the general-purpose destination register, encoded in the "Rd" field.

<Wn>	Is the 32-bit name of the first general-purpose source register holding the multiplicand, encoded in the "Rn" field.

<Wm>	Is the 32-bit name of the second general-purpose source register holding the multiplier, encoded in the "Rm" field.

<Wa>	Is the 32-bit name of the third general-purpose source register holding the addend, encoded in the "Ra" field.

<Xd>	Is the 64-bit name of the general-purpose destination register, encoded in the "Rd" field.

<Xn>	Is the 64-bit name of the first general-purpose source register holding the multiplicand, encoded in the "Rn" field.

<Xm>	Is the 64-bit name of the second general-purpose source register holding the multiplier, encoded in the "Rm" field.

<Xa>	Is the 64-bit name of the third general-purpose source register holding the addend, encoded in the "Ra" field.

Alias Conditions

Alias	Is preferred when
MUL	Ra == '11111'

Operation

let operand1 : bits(datasize) = X{}(n); let operand2 : bits(datasize) = X{}(m); let operand3 : bits(datasize) = X{}(a); let result : integer = UInt(operand3) + (UInt(operand1) * UInt(operand2)); X{datasize}(d) = result[datasize-1:0];

Operational information

This instruction is a data-independent-time instruction as described in About PSTATE.DIT.

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
sf	0	0	1	1	0	1	1	0	0	0	Rm					0	Ra					Rn					Rd
	op54							op31								o0

32-bit encoding

64-bit encoding

Decode (all encodings)

Assembler Symbols

Alias Conditions

Operation

Operational information