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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 for this instruction.

313029282726252423222120191817161514131211109876543210
sf0011011000Rm011111RnRd
o0Ra

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.

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