SH7721 datasheet(186/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 3 DSP Operating Unit

Rev. 3.00 Jan. 18, 2008 Page 124 of 1458

REJ09B0033-0300

31 30

–28 to +28 – 2–31

32 31

–223 to +223 – 1

31 30

16 15

–1 to +1 – 2–15

16 15

–215 to +215 – 1

16 15

–32 to +32

16 15

–16 to +16

16 15

31 30

–1 to +1 – 2–31

–231 to +231 – 1

DSP type fixed point

With guard bits

Without guard bits

Multiplier input

DSP type integer

DSP type logical

With guard bits

CPU type integer

S: Sign bit

Longword

: Binary point

: Does not affect the operations

Without guard bits

Shift amount for

arithmetic shift (PSHA)

Shift amount for

logical shift (PSHL)

Figure 3.8 Data Formats

The shift amount for the arithmetic shift (PSHA) instruction has a 7-bit field that can represent

values from –64 to +63, but –32 to +32 are valid numbers for the instruction. Also the shift

amount for a logical shift operation has a 6-bit field, but –16 to +16 are valid numbers for the

instruction.

SH7721 Datasheet(PDF) 186 Page - Renesas Technology Corp

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