SH7713 Datasheet, PDF (155/904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 3 DSP Operating Unit
• Conditional Operations and Data Transfer
Some instructions belonging to this class can be executed conditionally, as described earlier.
The specified condition is valid only for the B field of the instruction, and is not valid for data
transfer instructions for which a parallel specification is made. Examples are shown in figure
3.7.
DCT PADD X0,Y0,A0 MOVX.W @R4+,X0 MOVY.W A0,@R6+R9 ;
When condition is True
Before execution: X0=H'33333333, Y0=H'55555555, A0=H'123456789A,
R4=H'00008000, R6=H'00005000, R9=H'00000004
(R4)=H'1111, (R6)=H'2222
After execution: X0=H'11110000, Y0=H'55555555, A0=H'0088888888,
R4=H'00008002, R6=H'00005004, R9=H'00000004
(R4)=H'1111, (R6)=H'3456
When condition is False
Before execution: X0=H'33333333, Y0=H'55555555, A0=H'123456789A,
R4=H'00008000, R6=H'00005000, R9=H'00000004
(R4)=H'1111, (R6)=H'2222
After execution: X0=H'11110000, Y0=H'55555555, A0=H'123456789A,
R4=H'00008002, R6=H'00005004, R9=H'00000004
(R4)=H'1111, (R6)=H'3456
Figure 3.7 Examples of Conditional Operations and Data Transfer Instructions
• 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 3.20.
Rev.1.50 Aug. 30, 2006 Page 115 of 860
REJ09B0288-0150