HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 171

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

39
31
16 15
0
Guard
Source 1 or 2
GT
Z
N
V DC
Priority encoder
DSR
Destination
Guard
Cleared to 0
39
31
16
0
Figure 3.19 PDMSB Operation Flow
The definition of the DC bit is selected by the CS[2:0] (DC bit condition selection) bits in DSR.
The DC bit result is
Carry or Borrow Mode: CS[2:0] = B'000: The DC bit is always cleared to 0.
Negative Value Mode: CS[2:0] = B'001: The DC bit is set to 1 when the operation result is a
negative value, and cleared to 0 when the operation result is zero or a positive value.
Zero Value Mode: CS[2:0] = B'010: The DC bit is set to 1 when the operation result is zero;
otherwise it is cleared to 0.
Overflow Mode: CS[2:0] = B'011: The DC bit is always cleared to 0.
Signed Greater Than Mode: CS[2:0] = B'100: The DC bit is set to 1 when the operation result is
a positive value; otherwise it is cleared to 0.
Signed Greater Than or Equal Mode: CS[2:0] = B'101: The DC bit is set to 1 when the
operation result is zero or a positive value; otherwise it is cleared to 0.
Rev. 1.00, 02/04, page 133 of 804