SH7641 Datasheet, PDF (148/1036 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7641 Series

Section 2 CPU
Assignment of NOPX and NOPY Instruction Codes: When there is no data transfer instruction
to be parallel-processed simultaneously with a DSP operation instruction, an NOPX or NOPY
instruction can be written as the data transfer instruction, or the instruction can be omitted. The
instruction code is the same whether an NOPX or NOPY instruction is written or the instruction is
omitted. Examples of NOPX and NOPY instruction codes are shown in table 2.33.
Table 2.33 Examples of NOPX and NOPY Instruction Codes
Instruction
PADD X0,Y0,A0
MOVX.W @R4+,X0
MOVY.W @R6+R9,Y0
PADD X0,Y0,A0 NOPX
MOVY.W @R6+R9,Y0
PADD X0,Y0,A0 NOPX
NOPY
PADD X0,Y0,A0 NOPX
PADD X0,Y0,A0
MOVX.W @R4+,X0 MOVY.W @R6+R9,Y0
MOVX.W @R4+,X0 NOPY
MOVS.W @R4+,X0
NOPX
MOVY.W @R6+R9,Y0
MOVY.W @R6+R9,Y0
NOPX
NOPY
NOP
Code
1111100000001011
1011000100000111
1111100000000011
1011000100000111
1111100000000000
1011000100000111
1111100000000000
1011000100000111
1111100000000000
1011000100000111
1111000000001011
1111000000001000
1111010010001000
1111000000000011
1111000000000011
1111000000000000
0000000000001001
Rev. 4.00 Sep. 14, 2005 Page 98 of 982
REJ09B0023-0400