File size: 3,093 Bytes
ae4627d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | 'use strict';
function half (arg) {
const name = arg.name;
const width = arg.width;
return [`${name}[${width / 2 - 1}:0]`, `${name}[${width - 1}:${width / 2}]`];
}
function signed (op) {
return function (args) {
const args2 = (args.length === 1) ? half(args[0]) : args.map(e => e.name);
return '(' + args2.map(e => '$signed(' + e + ')').join(' ' + op + ' ') + ')';
};
}
function logical (op) {
return function (args) {
const args2 = (args.length === 1) ? half(args[0]) : args.map(e => e.name);
return '(' + args2.join(' ' + op + ' ') + ')';
};
}
module.exports = {
/*
** exponentiation, numeric ** integer, result numeric
abs absolute value, abs numeric, result numeric
not complement, not logic or boolean, result same
* multiplication, numeric * numeric, result numeric
/ division, numeric / numeric, result numeric
mod modulo, integer mod integer, result integer
rem remainder, integer rem integer, result integer
+ unary plus, + numeric, result numeric
- unary minus, - numeric, result numeric
+ addition, numeric + numeric, result numeric
- subtraction, numeric - numeric, result numeric
& concatenation, array or element & array or element,
result array
*/
add: signed('+'),
'+': signed('+'),
sub: signed('-'),
'-': signed('-'),
mul: signed('*'),
'*': signed('*'),
sll: logical('<<'), // shift left logical, logical array sll integer, result same
srl: logical('>>>'), // shift right logical, logical array srl integer, result same
sla: logical('<<'), // shift left arithmetic, logical array sla integer, result same
sra: logical('>>'), // shift right arithmetic, logical array sra integer, result same
rol: logical('rol'), // rotate left, logical array rol integer, result same
ror: logical('ror'), // rotate right, logical array ror integer, result same
/*
= test for equality, result is boolean
/= test for inequality, result is boolean
< test for less than, result is boolean
<= test for less than or equal, result is boolean
> test for greater than, result is boolean
>= test for greater than or equal, result is boolean
*/
and: logical('&'), // logical and, logical array or boolean, result is same
or: logical('|'), // logical or, logical array or boolean, result is same
nand: logical('&'), // logical complement of and, logical array or boolean, result is same
nor: logical('|'), // logical complement of or, logical array or boolean, result is same
xor: logical('^'), // logical exclusive or, logical array or boolean, result is same
xnor: logical('^'), // logical complement of exclusive or, logical array or boolean, result is same
concat: args => '{' + args.reverse().map(e => e.name).join(', ') + '}'
};
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