Final answer:
Without the specific code sequence, it's not possible to determine the exact number of clock cycles needed or to calculate the CPI. Stalling, Forwarding, and load ordering/code scheduling are methods used to handle data hazards in a pipeline, but actual outcomes depend on the instructions and the processor.
Step-by-step explanation:
To determine how many clock cycles are needed to execute a code sequence while overcoming data hazards using Stall, Forwarding, and load ordering/code scheduling, we would need to evaluate the code in question. However, since the actual code sequence is not provided here, we can discuss the general approach.
Data hazards occur when a pipeline must wait because the next instruction requires a result from a previous instruction. There are several tactics to overcome this:
Stalling: Inserts 'no-operation' (NOP) instructions into the pipeline to delay subsequent instructions until the data hazard is resolved.
Forwarding: Also known as data bypassing, it takes the data straight from the output of one pipeline stage into an earlier stage where it is needed, bypassing the need to wait for it to travel through the entire pipeline.
Load ordering/code scheduling: Reordering instructions by the compiler or the programmer to minimize the occurrence of data hazards.
Without the specific code, we cannot accurately determine the clock cycles or draw the datapath necessary for execution. The CPI (Cycles Per Instruction) is also contingent on the specific instructions and the capability of the processor's handling of hazards.
Please provide the code sequence or additional context, so a precise calculation can be done.