How can I shared a FPU between two Rocket cores？

**Type of issue**: bug report | feature request | other enhancement

**Impact**: no functional change | API addition (no impact on existing code) | API modification | unknown

**Development Phase**: request | proposal

**Other information**

**If the current behavior is a bug, please provide the steps to reproduce the problem:**

**What is the current behavior?**

**What is the expected behavior?**

**Please tell us about your environment:**

**What is the use case for changing the behavior?**

The issue names no files, tests, or entry points and provides no environment or expected behavior. Start by clarifying whether shared FPU support is a feature request or a usage question, then locate the Rocket core and FPU generation paths; completion criteria are not defined in the issue.

Written by the indexing model from the issue text.