MUL

MUL

Multiply

: Rd = Rn * Rm.

This is an alias of MADD. This means:

The encodings in this description are named to match the encodings of MADD.
The description of MADD gives the operational pseudocode, any CONSTRAINED UNPREDICTABLE behavior, and any operational information for this instruction.

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	1	1	1	1	1	Rn					Rd
																o0	Ra

32-bit (sf == 0)

MUL <Wd>, <Wn>, <Wm>

is equivalent to

MADD <Wd>, <Wn>, <Wm>, WZR

and is always the preferred disassembly.

64-bit (sf == 1)

MUL <Xd>, <Xn>, <Xm>

is equivalent to

MADD <Xd>, <Xn>, <Xm>, XZR

and is always the preferred disassembly.

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.

<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.

Operation

The description of MADD gives the operational pseudocode for this instruction.