* To hold all Vector Context, five SPRs are needed for userspace (MSR.PR=1 Problem State).
If Supervisor and Hypervisor mode are to also support Simple-V they will correspondingly
need five SPRs each.
-* Six 5/6-bit XO (A-Form) "Management" instructions are needed.
+* Five 6-bit XO (A-Form) "Management" instructions are needed.
**Summary of Opcode space**
* 75% of one Major Opcode (equivalent to the rest of EXT017)
-* Six 5/6-bit operations.
+* Five 6-bit operations.
No further opcode space *for Simple-V* is envisaged to be required for at least
the next decade.
* Management Instructions
-**setvl**
+* **setvl** - Cray-style Scalar Vector Length instruction
+* **svremap** - "tags" registers for activating REMAP
+* **svshape** - convenience instruction for quickly setting up Matrix, DCT, FFT and
+ Parallel Reduction REMAP
+* **svshape2** - additional convenience instruction to set up "Indexed" REMAP
+ (fits within svshape's XO encoding)
+* **svindex** -
# SVP64 24-bit Prefix
-The SVP64 24-bit Prefix provides several options
+The SVP64 24-bit Prefix provides several options, too numerous to describe in this
+document. The primary options are:
+
+
* Due to a concept called "Element-width Overrides