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RORS (register)

Rotate Right, setting flags (register) provides the value of the contents of a register rotated by a variable number of bits, and updates the condition flags based on the result. The bits that are rotated off the right end are inserted into the vacated bit positions on the left. The variable number of bits is read from the bottom byte of a register.

This is an alias of MOV, MOVS (register-shifted register). This means:

It has encodings from the following instruction sets: A32 ( A1 ) and T32 ( T1 and T2 ) .

A1

313029282726252423222120191817161514131211109876543210
!= 111100011011(0)(0)(0)(0)RdRs0111Rm
condStype

Flag setting

RORS{<c>}{<q>} {<Rd>,} <Rm>, <Rs>

is equivalent to

MOVS{<c>}{<q>} <Rd>, <Rm>, ROR <Rs>

and is always the preferred disassembly.

T1

1514131211109876543210
0100000111RsRdm
op

Rotate right

RORS{<q>} {<Rdm>,} <Rdm>, <Rs> // (Outside IT block)

is equivalent to

MOVS{<q>} <Rdm>, <Rdm>, ROR <Rs>

and is the preferred disassembly when !InITBlock().

T2

15141312111098765432101514131211109876543210
111110100111Rm1111Rd0000Rs
typeS

Flag setting

RORS.W {<Rd>,} <Rm>, <Rs> // (Outside IT block, and <Rd>, <Rm>, <type>, <Rs> can be represented in T1)

RORS{<c>}{<q>} {<Rd>,} <Rm>, <Rs>

is equivalent to

MOVS{<c>}{<q>} <Rd>, <Rm>, ROR <Rs>

and is always the preferred disassembly.

Assembler Symbols

<c>

See Standard assembler syntax fields.

<q>

See Standard assembler syntax fields.

<Rdm>

Is the first general-purpose source register and the destination register, encoded in the "Rdm" field.

<Rd>

Is the general-purpose destination register, encoded in the "Rd" field.

<Rm>

Is the first general-purpose source register, encoded in the "Rm" field.

<Rs>

Is the second general-purpose source register holding a rotate amount in its bottom 8 bits, encoded in the "Rs" field.

Operation

The description of MOV, MOVS (register-shifted register) gives the operational pseudocode for this instruction.

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