SH7065 Datasheet, PDF (56/941 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

Section 2 CPU
DSP type fixed-point
39
With guard bits
S
Without guard bits
39
Multiplication input
32 31 30
31 30
S
31 30
S
16 15
0
–2⁸ to +2⁸ – 2^–31
0
–1 to +1 – 2^–31
0
–1 to +1 – 2^–15
DSP type integer
39
With guard bits
S
Without guard bits
Arithmetic shift (PSHA)
Logical shift (PSHL)
32 31
31
S
31
31
16 15
16 15
22 16 15
S
21 16 15
S
0
–2²³ to +2²³ –1
0
–2¹⁵ to +2¹⁵ –1
0
–32 to +32
0
–16 to +16
39
31
DSP type logical
31
SuperH type integer (word)
[For reference]
S
16 15
0
(16 bits)
0
–2³¹ to +2³¹ –1
Legend:
S : Sign bit
: Binary point
: Not related to processing (ignored)
Figure 2.7 DSP Type Data Formats
Rev. 5.00 Sep 11, 2006 page 34 of 916
REJ09B0332-0500