ELLA (programming language)


ELLA is a Hardware description language and support toolset. Developed by the Royal Signals and Radar Establishment during the 1980s and 1990s.
Includes tools to perform:
ELLA is a winner of the 1989 Queen's Award for Technological Achievement.

Sample

Sample originally from ftp://ftp.dra.hmg.gb/pub/ella - Public release.
Code for matrix multiplication hardware design verification:

MAC ZIP = -> t:
 .
 
MAC TRANSPOSE = -> t:
 matrix.
MAC INNER_PRODUCT
 = -> s:
 IF n = 1 THEN *vector
 ELSE *vector + INNER_PRODUCT vector
 FI.
MAC MATRIX_MULT =
 -> s:
BEGIN
 LET transposed_matrix2 = TRANSPOSE matrix2.
OUTPUT 
 INNER_PRODUCTZIP
END.
TYPE element = NEW elt/,
 product = NEW prd/.
FN PLUS = -> product:
 ARITH integer1 + integer2.
FN MULT = -> product:
 ARITH integer1 * integer2.
FN MULT_234 = ->
 product: 
 MATRIX_MULT.
FN TEST = -> product:
,
 ), 
 m2 =, 
 ,
 ).
 OUTPUT
 MULT_234 
).
COM test: just displaysignal MOC