SH7713 Datasheet, PDF (138/904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 3 DSP Operating Unit
In assembler, R0 to R9 are used as symbols. In the DSP data transfer instructions, the following
register names (alias) can also be used. In assembler, described as shown below.
Ix: .REG (R8)
Ix indicates the alias of register 8. Other aliases are shown below.
Ax0: .REG (R4)
Ax1: .REG (R5)
Ix: .REG (R8)
Ay0: .REG (R6)
Ay1: .REG (R7)
Iy: .REG (R9)
As0: .REG (R4); This definition is used for if the alias is required in the single data transfer
As1: .REG (R5); This definition is used for if the alias is required in the single data transfer
As2: .REG (R2)
As3: .REG (R3)
Is: .REG (R8); This definition is used for if the alias is required in the single data transfer
Rev.1.50 Aug. 30, 2006 Page 98 of 860
REJ09B0288-0150