* 7 32 bit contexts are stored, each indexed from 0b001 to 0b111,
2 per 64 bit SPR and 1 in the 4th.
* Starting from bit 32 of the 4th SPR, in batches of 40 bits the Shift
- Registers are stored.
+ Registers (bit-level FIFOs) are stored.
```
- 0 31 32 63
- SVREMAP0 context 0 context 1
- SVREMAP1 context 2 context 3
- SVREMAP2 context 4 context 5
- SVREMAP3 context 6
+ 0 31 32 63
+ SVCTX0 context 0 context 1
+ SVCTX1 context 2 context 3
+ SVCTX2 context 4 context 5
+ SVCTX3 context 6 FIFO0[0..31]
+ SVCTX4 FIFO0[32:39] FIFO1[0:39] FIFO2[0:15]
+ SVCTX5 FIFO2[16:39] FIFO3[0:39] FIFO4[0:7]
+ SVCTX5 FIFO4[8:39] FIFO5[0:39] FIFO5[0:15]
+ SVCTX6 FIFO5[16:39] FIFO6[0:39] FIFO7[0:7
+ SVCTX7 FIFO7[16:39]
```
When each LSB is nonzero in any one of the seven Shift Registers