Signed Most significant word Multiply.
is an optional parameter. If R is present, the result is rounded, otherwise it is truncated.
is an optional condition code.
is the destination register.
are the registers holding the operands.
is a register holding the value to be added or subtracted from.
SMMUL multiplies the 32-bit values from
, and stores the most significant 32 bits of the
64-bit result to
If the optional R parameter is specified,
added before extracting the most significant 32 bits. This has the
effect of rounding the result.
You cannot use PC for any operand.
You can use SP in A32 instructions but this is deprecated. You cannot use SP in T32 instructions.
This instruction does not change the flags.
The 32-bit instruction is available in A32 and T32.
For the Armv7‑M architecture, the 32-bit T32 instruction is only available in an Armv7E-M implementation.
There is no 16-bit version of this instruction in T32.
SMMULGE r6, r4, r3 SMMULR r2, r2, r2