HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 161

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

always indicates the same state as the DC bit set in overflow mode by the CS[2:0] bits. See the
overflow mode part above. The GT bit always indicates the same state as the DC bit set in signed
greater than mode by the CS[2:0] bits. See the signed greater than mode part above.
Note: The DC bit is always updated as the carry flag for ‘PADDC’ and is always updated as the
• Overflow Protection
3.5.5
Figure 3.14 shows the ALU integer arithmetic operation flow. Table 3.23 shows the variation of
this type of operation. The correspondence between each operand and registers is the same as
ALU fixed-point operations as shown in table 3.22.
The S bit in SR is effective for any ALU fixed-point arithmetic operations in the DSP unit. See
section 3.5.11, Overflow Protection, for details.
carry/borrow flag for ‘PSUBC’ regardless of the CS[2:0] state.
ALU Integer Operations
39
Guard
31
Source 1
Figure 3.14 ALU Integer Arithmetic Operation Flow
16
39
Guard
31
0
ALU
16
39
Guard
Destination
31
Source 2
0
16
DSR
Rev. 1.00, 02/04, page 123 of 804
Ignored
Cleared to 0
0
GT Z
N
V DC