Support vector extensions #1007

Job	Run time
riscv-arch-test	0s
riscv-tests (DefaultConfig)	19m 29s
emulator (DefaultSmallConfig)	15m 1s
jtag-dtm-test (freechips.rocketchip.system.WithJtagDTMSystem_freechips.rocketchip.system.DefaultC...	21m 16s
riscv-tests (DefaultBufferlessConfig)	18m 45s
emulator (DualBankConfig)	12m 57s
riscv-tests (DefaultRV32Config)	18m 29s
jtag-dtm-test (freechips.rocketchip.system.WithJtagDTMSystem_freechips.rocketchip.system.DefaultR...	20m 13s
emulator (DualChannelConfig)	13m 17s
riscv-tests (TinyConfig)	13m 36s
jtag-dtm-test (freechips.rocketchip.system.WithJtagDTMSystem_freechips.rocketchip.system.WithDebu...	18m 21s
emulator (DualChannelDualBankConfig)	13m 52s
riscv-tests (DefaultFP16Config)	14m 22s
jtag-dtm-test (freechips.rocketchip.system.WithJtagDTMSystem_freechips.rocketchip.system.WithDebu...	17m 27s
emulator (RoccExampleConfig)	13m 17s
emulator (Edge128BitConfig)	13m 58s
emulator (Edge32BitConfig)	13m 3s
emulator (QuadChannelBenchmarkConfig)	13m 27s
emulator (EightChannelConfig)	14m 9s
emulator (DualCoreConfig)	13m 21s
emulator (MemPortOnlyConfig)	15m 3s
emulator (MMIOPortOnlyConfig)	13m 1s
emulator (CloneTileConfig)	14m 17s
emulator (HypervisorConfig)	13m 17s
	5h 53m 58s

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