HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 155

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

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. The results when an invalid shift amount is specified cannot be guaranteed.
DSP type fixed point
DSP type integer
DSP type logical
CPU type integer
S: Sign bit
With guard bits
Without guard bits
Multiplier input
With guard bits
Without guard bits
Shift amount for
arithmetic shift (PSHA)
Shift amount for
logical shift (PSHL)
Longword
: Binary point
39
39
39
39
S
S
Figure 3.8 Data Formats
31 30
31 30
31 30
32 31
31
31
31
31
S
S
S
31
S
22
S
21
S
: Does not affect the operations
16 15
16 15
16 15
16 15
16 15
16 15
Rev. 1.00, 02/04, page 117 of 804
0
0
0
0
0
0
0
0
0
–2
–1 to +1 – 2
–1 to +1 – 2
–2
–2
–32 to +32
–16 to +16
–2
8
23
15
31
to +2
to +2
to +2
to +2
8
23
15
31
– 2
–31
–15
– 1
– 1
– 1
–31