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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.94 Bcc (Branch Relative if Condition Satisfied)
This branching instruction has no delay slot.
If the conditions established for each particular instruction are satisfied, branch to the
address indicated by "label9" relative to the value of the program counter (PC). When
calculating the address, double the value of "rel8" as a signed extension.
If conditions are not satisfied, no branching can occur.
Conditions for each instruction are listed in Table 7.94-1.
■ Bcc (Branch Relative if Condition Satisfied)
Assembler format: BRA label9 BV label9
BNO label9 BNV label9
BEQ label9 BLT label9
BNE label9 BGE label9
BC label9 BLE label9
BNC label9 BGT label9
BN label9 BLS label9
BP label9 BHI label9
Operation: if (conditions satisfied) {
PC + 2 + exts (rel8 × 2) → PC
}
Flag change:
N, Z, V, and C: Unchanged
Table 7.94-1 Branching Conditions
Mnemonic cc Conditions Mnemonic cc Conditions
BRA 0000 Always satisfied BV 1000 V = 1
BNO 0001 Always unsatisfied BNV 1001 V = 0
BEQ 0010 Z = 1 BLT 1010 V xor N = 1
BNE 0011 Z = 0 BGE 1011 V xor N = 0
BC 0100 C = 1 BLE 1100 (V xor N) or Z = 1
BNC 0101 C = 0 BGT 1101 (V xor N) or Z = 0
BN 0110 N = 1 BLS 1110 C or Z = 1
BP 0111 N = 0 BHI 1111 C or Z = 0
NZVC
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