SH7710 Datasheet, PDF (153/996 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 3 DSP Operating Unit
The DSR is assigned to the system registers. For the DSR, the following load and store
instructions are supported.
STS DSR,Rn;
STS.L DSR,@-Rn;
LDS Rn,DSR;
LDS.L @Rn+,DSR;
If the DSR is read by the STS instruction, upper bits (bits 31 to 16) are all 0
3.5.2 DSP Operation Instruction Set
DSP operation instructions are instructions for digital signal processing performed by the DSP
unit. These instructions have a 32-bit instruction code, and multiple instructions can be executed
in parallel. The instruction code is divided into an A field and B field; a parallel data transfer
instruction is specified in the A field, and a single or double data operation instruction in the B
field. Instructions can be specified independently, and are also executed independently.
B-field data operation instructions are of three kinds: double data operation instructions,
conditional single data operation instructions, and unconditional single data operation instructions.
The formats of the DSP operation instructions are shown in table 3.17. The respective operands
are selected independently from the DSP registers. The correspondence between DSP operation
instruction operands and registers is shown in table 3.18.
Rev. 2.00 Dec. 07, 2005 Page 111 of 950
REJ09B0079-0200