Add Support for Vector Floating-Point Instructions

[kathlenemagnus-mips]

Add vector sequencer and execution support for the vector floating-point instructions. At least 1 test should be added with an instruction from each category to verify proper sequencing.

• Vector Floating-Point Instructions: Vector Floating-Point Exception Flags
• Vector Floating-Point Instructions: Vector Single-Width Floating-Point Add/Subtract Instructions
• Vector Floating-Point Instructions: Vector Widening Floating-Point Add/Subtract Instructions
• Vector Floating-Point Instructions: Vector Single-Width Floating-Point Multiply/Divide Instructions
• Vector Floating-Point Instructions: Vector Widening Floating-Point Multiply
• Vector Floating-Point Instructions: Vector Single-Width Floating-Point Fused Multiply-Add Instructions
• Vector Floating-Point Instructions: Vector Widening Floating-Point Fused Multiply-Add Instructions
• Vector Floating-Point Instructions: Vector Floating-Point Square-Root Instruction
• Vector Floating-Point Instructions: Vector Floating-Point Reciprocal Square-Root Estimate Instruction
• Vector Floating-Point Instructions: Vector Floating-Point Reciprocal Estimate Instruction
• Vector Floating-Point Instructions: Vector Floating-Point MIN/MAX Instructions
• Vector Floating-Point Instructions: Vector Floating-Point Sign-Injection Instructions
• Vector Floating-Point Instructions: Vector Floating-Point Compare Instructions
• Vector Floating-Point Instructions: Vector Floating-Point Classify Instruction
• Vector Floating-Point Instructions: Vector Floating-Point Merge Instruction
• Vector Floating-Point Instructions: Vector Floating-Point Move Instruction
• Vector Floating-Point Instructions: Single-Width Floating-Point/Integer Type-Convert Instructions
• Vector Floating-Point Instructions: Widening Floating-Point/Integer Type-Convert Instructions
• Vector Floating-Point Instructions: Narrowing Floating-Point/Integer Type-Convert Instructions