| ; | |
| 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(', ') + '}' | |
| }; | |