Answer:
Use "less than" with the operations reversed.
Use "less than" with the operations reversed.
The
floating point branch instructions inspect the condition bit in the coprocessor.
The bc1t instruction takes the branch if the bit is true (==1).
The bc1f instruction takes the branch if the bit is false (==0).
These are the only two floating point branch instructions.
| Instruction | Operation |
|---|---|
bc1t label | branch to label if the coprocessor 1 condition bit is true |
bc1f label | branch to label if the coprocessor 1 condition bit is false |
The
branch instructions have a one instruction branch delay.
Hardware requires a nop instruction
after each branch instruction.
For this chapter, let us not bother with this.
When running the programs with SPIM, disable branch delays in the
settings menu.
Where does execution of the bc1t instruction take place?
In the FPU or the CPU?