Jiuyang Liu

0. Start to implement SRT table generator. 1. Can draw P-D and Robertson graph now. 2. Add dependency breeze for diagram and spire for arbitrary precision.

1. small-width, multi-cycle prefix adder 2. carry-in and carry-out. 3. `pipeAt` support for multi-cycle 4. back pressure with `RegEnable` 5. Fixed Point & SInt support

- different width for a and b(this is useful for some small utilities) - FixedPoint support(this is useful for DSP) - back pressure(this is useful for in-order CPU designing)

Blocked by #528

we need some helper script for development, future plan is hide `nix` command from developers. - genConfig [someConfig(fall back if not exist)] to pwd. - elaborate [ip, ipemu, ...] --config...

IP Emulator is designed for simulate vector instructions w/o a scalar core, thus we use spike as scalar core. For now, each vector commits only used for cosim, and won't...