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THUMB INSTRUCTION SET S3C2440A RISC MICROPROCESSOR
4-34
FORMAT 16: CONDITIONAL BRANCH
[7:0] 8-bit Signed Immediate
[11:8] Condition
15 0
1
14
10
13 12
11
SOffset 8
1
78
Cond
Figure 4-17. Format 16
OPERATION
The instructions in this group all perform a conditional Branch depending on the state of the CPSR condition
codes. The branch offset must take account of the prefetch operation, which causes the PC to be 1 word (4 bytes)
ahead of the current instruction.
The THUMB assembler syntax is shown in the following table.
Table 4-17. The Conditional Branch Instructions
L THUMB assembler ARM equivalent Description
0000 BEQ label BEQ label Branch if Z set (equal)
0001 BNE label BNE label Branch if Z clear (not equal)
0010 BCS label BCS label Branch if C set (unsigned higher or same)
0011 BCC label BCC label Branch if C clear (unsigned lower)
0100 BMI label BMI label Branch if N set (negative)
0101 BPL label BPL label Branch if N clear (positive or zero)
0110 BVS label BVS label Branch if V set (overflow)
0111 BVC label BVC label Branch if V clear (no overflow)
1000 BHI label BHI label Branch if C set and Z clear (unsigned higher)