Module reed_solomon_simd::engine::tables

Lookup-tables used by Engine:s.

All tables are global and each is initialized at most once.

Tables

Table	Size	Used in encoding	Used in decoding	By engines
Exp	128 kiB	yes	yes	all
Log	128 kiB	yes	yes	all
LogWalsh	128 kiB	-	yes	all
Mul16	8 MiB	yes	yes	NoSimd
Mul128	8 MiB	yes	yes	Avx2 Ssse3
Skew	128 kiB	yes	yes	all

Structs

• Multiply128lutT
  Elements of the Mul128 table

Functions

• initialize_exp_log
  Initializes and returns Exp and Log tables.
• initialize_log_walsh
  Initializes and returns LogWalsh table.
• initialize_mul16
  Initializes and returns Mul16 table.
• initialize_mul128
  Initializes and returns Mul128 table.
• initialize_skew
  Initializes and returns Skew table.
• mul
  Calculates x * log_m using Exp and Log tables.

Type Aliases

• Exp
  Used by Naive engine for multiplications and by all Engine:s to initialize other tables.
• Log
  Used by Naive engine for multiplications and by all Engine:s to initialize other tables.
• LogWalsh
  Used by all Engine:s in Engine::eval_poly.
• Mul16
  Used by NoSimd engine for multiplications.
• Mul128
  Used by Avx2 and Ssse3 engines for multiplications.
• Skew
  Used by all Engine:s for FFT and IFFT.