Final answer:
The student is asking to convert C code to maps and identify hazards. To provide an answer, it is necessary to see the actual code.
Step-by-step explanation:
To convert the given C code to maps and identify hazards, it would be helpful to see the actual code. Could you please provide it so that I can assist you further?
The question involves converting C code to pipeline instruction mappings, identifying types of pipeline hazards such as data, control, and structural hazards, and reordering instructions to avoid pipeline stalls. Exact solutions require specific code and architecture details.
The question appears to be asking for help with converting C code to an architectural representation (maps) used in pipeline processing, identifying pipeline hazards, and then reordering the code to avoid stalls that can occur due to these hazards. In a pipelined CPU architecture, hazards are conditions that prevent the next instruction in the instruction stream from executing during its designated clock cycle. There are three types of hazards:
Data hazards occur when instructions that exhibit data dependency modify data in different stages of the pipeline.
Control hazards happen when the pipeline makes the wrong decision on branch prediction and therefore, has to correct itself.
Structural hazards arise from resource conflicts when the hardware cannot support all possible combinations of instructions in simultaneous overlapped execution.
Reordering instructions involves strategically placing independent instructions in between dependent instructions to ensure the pipeline can continue executing without stalls that occur from hazards. To avoid data hazards, one might insert independent instructions that do not use the same data resources, or implement pipeline forwarding to avoid read-after-write hazards. For control hazards, branch prediction algorithms can be used. Structural hazards require a careful allocation of resources to ensure conflicts do not occur.
Without the actual code and the specific pipeline architecture in question, it is impossible to give a detailed reordering, but these principles guide how to handle pipeline hazards in general.