simple_v_extension/p_comparative_analysis.mdwn

   1 # P-Ext ISA
   2
   3 [[!toc ]]
   4
   5 # 16-bit Arithmetic
   6
   7 | Mnemonic           | 16-bit Instruction        | Simple-V Equivalent |
   8 | ------------------ | ------------------------- | ------------------- |
   9 | ADD16 rt, ra, rb   | add                       | RV ADD (bitwidth=16) |
  10 | RADD16 rt, ra, rb  | Signed Halving add        | |
  11 | URADD16 rt, ra, rb | Unsigned Halving add      | |
  12 | KADD16 rt, ra, rb  | Signed Saturating add     | |
  13 | UKADD16 rt, ra, rb | Unsigned Saturating add   | |
  14 | SUB16 rt, ra, rb   | sub                       | RV SUB (bitwidth=16) |
  15 | RSUB16 rt, ra, rb  | Signed Halving sub        | |
  16 | URSUB16 rt, ra, rb | Unsigned Halving sub                | |
  17 | KSUB16 rt, ra, rb  | Signed Saturating sub               | |
  18 | UKSUB16 rt, ra, rb | Unsigned Saturating sub             | |
  19 | CRAS16 rt, ra, rb  | Cross Add & Sub                     | |
  20 | RCRAS16 rt, ra, rb | Signed Halving Cross Add & Sub      | |
  21 | URCRAS16 rt, ra, rb| Unsigned Halving Cross Add & Sub    | |
  22 | KCRAS16 rt, ra, rb | Signed Saturating Cross Add & Sub   | |
  23 | UKCRAS16 rt, ra, rb| Unsigned Saturating Cross Add & Sub | |
  24 | CRSA16 rt, ra, rb  | Cross Sub & Add                     | |
  25 | RCRSA16 rt, ra, rb | Signed Halving Cross Sub & Add      | |
  26 | URCRSA16 rt, ra, rb| Unsigned Halving Cross Sub & Add    | |
  27 | KCRSA16 rt, ra, rb | Signed Saturating Cross Sub & Add   | |
  28 | UKCRSA16 rt, ra, rb| Unsigned Saturating Cross Sub & Add | |
  29
  30 # 8-bit Arithmetic
  31
  32 | Mnemonic           | 16-bit Instruction        | Simple-V Equivalent |
  33 | ------------------ | ------------------------- | ------------------- |
  34 | ADD8 rt, ra, rb    | add                       | RV ADD (bitwidth=8)|
  35 | RADD8 rt, ra, rb   | Signed Halving add        | |
  36 | URADD8 rt, ra, rb  | Unsigned Halving add      | |
  37 | KADD8 rt, ra, rb   | Signed Saturating add     | |
  38 | UKADD8 rt, ra, rb  | Unsigned Saturating add   | |
  39 | SUB8 rt, ra, rb    | sub                       | RV SUB (bitwidth=8)|
  40 | RSUB8 rt, ra, rb   | Signed Halving sub        | |
  41 | URSUB8 rt, ra, rb  | Unsigned Halving sub      | |
  42