; rotate right R1:R0 by 0
; rotate right R1:R0 by 1
MOV A, R1
MOV C, ACC.0
XCH A, R0
RRC A
XCH A, R0
RRC A
MOV R1, A
; rotate right R1:R0 by 2
MOV A, R1
MOV C, ACC.0
XCH A, R0
RRC A
XCH A, R0
RRC A
MOV C, ACC.0
XCH A, R0
RRC A
XCH A, R0
RRC A
MOV R1, A
; rotate right R1:R0 by 3
MOV A, R0
XRL A, R1
MOV R1, A
ANL A, #0xf8
XRL A, R0
SWAP A
RL A
XCH A, R1
SWAP A
RL A
XRL A, R1
MOV R0, A
; rotate right R1:R0 by 4
MOV A, R0
XRL A, R1
ANL A, #0xf0
XCH A, R1
XRL A, R1
SWAP A
XCH A, R0
XRL A, R1
SWAP A
MOV R1, A
; rotate right R1:R0 by 5
MOV A, R1
XRL A, R0
ANL A, #0x1f
XCH A, R0
XRL A, R0
RR A
SWAP A
XCH A, R0
XRL A, R1
SWAP A
RR A
MOV R1, A
; rotate right R1:R0 by 6
MOV A, R1
RLC A
XCH A, R0
RLC A
XCH A, R1
RLC A
MOV C, ACC.7
XCH A, R1
RLC A
XCH A, R1
RLC A
MOV R0, A
; rotate right R1:R0 by 7
MOV A, R0
MOV C, ACC.7
MOV A, R1
RLC A
XCH A, R0
RLC A
MOV R1, A
; rotate right R1:R0 by 8
MOV A, R1
XCH A, R0
MOV R1, A
; rotate right R1:R0 by 9
MOV A, R1
RRC A
MOV A, R0
RRC A
XCH A, R1
RRC A
MOV R0, A
; rotate right R1:R0 by 10
MOV A, R1
XRL A, R0
ANL A, #0x3
XRL A, R1
RR A
RR A
XCH A, R0
XRL A, R1
RR A
RR A
XRL A, R0
MOV R1, A
; rotate right R1:R0 by 11
MOV A, R1
XRL A, R0
MOV R1, A
ANL A, #0x7
XRL A, R0
RL A
SWAP A
XCH A, R1
RL A
SWAP A
XRL A, R1
MOV R0, A
; rotate right R1:R0 by 12
MOV A, R0
XRL A, R1
ANL A, #0xf0
XCH A, R1
XRL A, R1
SWAP A
XCH A, R1
XRL A, R0
SWAP A
MOV R0, A
; rotate right R1:R0 by 13
MOV A, R1
XRL A, R0
ANL A, #0xe0
XCH A, R0
XRL A, R0
SWAP A
RR A
XCH A, R0
XRL A, R1
RR A
SWAP A
MOV R1, A
; rotate right R1:R0 by 14
MOV A, R1
MOV C, ACC.7
XCH A, R0
RLC A
XCH A, R0
RLC A
MOV C, ACC.7
XCH A, R0
RLC A
XCH A, R0
RLC A
MOV R1, A
; rotate right R1:R0 by 15
MOV A, R1
MOV C, ACC.7
XCH A, R0
RLC A
XCH A, R0
RLC A
MOV R1, A