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Fixes for LogicValue operation bugs related to size, sign, math, and …
…comparison (#319) Co-authored-by: Kirkpatrick, Desmond A <desmond.a.kirkpatrick@intel.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,166 @@ | ||
| // Copyright (C) 2021-2023 Intel Corporation | ||
| // SPDX-License-Identifier: BSD-3-Clause | ||
| // | ||
| // logic_value_width_test.dart | ||
| // Unit tests for width issues (64-bit boundary) in [LogicValue]. | ||
| // | ||
| // 2023 September 17 | ||
| // Author: Desmond Kirkpatrick <desmond.a.kirkpatrick@intel.com> | ||
|
|
||
| import 'package:rohd/rohd.dart'; | ||
| import 'package:test/test.dart'; | ||
|
|
||
| void main() { | ||
| test('crash compare', () { | ||
| final input = Const(BigInt.from(2).pow(128), width: 129); | ||
| final output = Logic(); | ||
| Combinational([ | ||
| If.block([ | ||
| Iff(input.getRange(0, 128) > BigInt.from(0), | ||
| [output < Const(1, width: 1)]), | ||
| Else([output < Const(0, width: 1)]), | ||
| ]) | ||
| ]); | ||
| }); | ||
|
|
||
| test('bad compare', () { | ||
| const i = 64; | ||
| final input = Const(BigInt.from(1) << (i - 1), width: i); | ||
| final output = Logic(); | ||
| Combinational([ | ||
| If.block([ | ||
| Iff(input > BigInt.from(0), [output < Const(1, width: 1)]), | ||
| Else([output < Const(0, width: 1)]), | ||
| ]) | ||
| ]); | ||
| final b = ~input.eq(0); | ||
| expect(output.value, equals(b.value)); | ||
| }); | ||
|
|
||
| test('big value test', () { | ||
| expect( | ||
| LogicValue.ofBigInt(BigInt.zero, 128) + | ||
| LogicValue.ofBigInt(BigInt.zero, 128), | ||
| LogicValue.ofInt(0, 128)); | ||
| }); | ||
|
|
||
| group('values test', () { | ||
| for (final len in [63, 64, 65, 66, 67]) { | ||
| final sslv = LogicValue.ofInt(4, len); // small Int hold Big | ||
| final bslv = LogicValue.ofInt(-0xFFFF, len); // 18446744073709486081 | ||
| final fslv = LogicValue.ofInt(-2, len); // 18446744073709551614 | ||
|
|
||
| final sblv = LogicValue.ofBigInt(BigInt.from(4), len); | ||
| final bblv = LogicValue.ofBigInt(BigInt.from(-0xFFFF), len); | ||
| final fblv = LogicValue.ofBigInt(BigInt.from(-2), len); | ||
|
|
||
| test('small Int storage len=$len', () { | ||
| expect(sslv < bslv, LogicValue.one); | ||
| expect(bslv < sslv, LogicValue.zero); | ||
| expect(sslv > bslv, LogicValue.zero); | ||
| expect(bslv > sslv, LogicValue.one); | ||
|
|
||
| expect(sslv < fslv, LogicValue.one); | ||
| expect(fslv < sslv, LogicValue.zero); | ||
| expect(sslv > fslv, LogicValue.zero); | ||
| expect(fslv > sslv, LogicValue.one); | ||
|
|
||
| expect(bslv < fslv, LogicValue.one); | ||
| expect(fslv < bslv, LogicValue.zero); | ||
| expect(bslv > fslv, LogicValue.zero); | ||
| expect(fslv > bslv, LogicValue.one); | ||
| }); | ||
|
|
||
| test('big Int storage len=$len', () { | ||
| expect(sblv < bblv, LogicValue.one); | ||
| expect(bblv < sblv, LogicValue.zero); | ||
| expect(sblv > bblv, LogicValue.zero); | ||
| expect(bblv > sblv, LogicValue.one); | ||
|
|
||
| expect(sblv < fblv, LogicValue.one); | ||
| expect(fblv < sblv, LogicValue.zero); | ||
| expect(sblv > fblv, LogicValue.zero); | ||
| expect(fblv > sblv, LogicValue.one); | ||
|
|
||
| expect(bblv < fblv, LogicValue.one); | ||
| expect(fblv < bblv, LogicValue.zero); | ||
| expect(bblv > fblv, LogicValue.zero); | ||
| expect(fblv > bblv, LogicValue.one); | ||
| }); | ||
|
|
||
| test('big math len=$len', () { | ||
| expect(sslv + fslv, LogicValue.ofInt(2, len)); | ||
| expect(sslv - fslv, LogicValue.ofInt(6, len)); | ||
| expect(fslv - sslv, LogicValue.ofInt(-6, len)); | ||
|
|
||
| expect(sslv * fslv, LogicValue.ofInt(-8, len)); | ||
|
|
||
| expect(sslv + fslv, LogicValue.ofBigInt(BigInt.from(2), len)); | ||
| expect(sslv - fslv, LogicValue.ofBigInt(BigInt.from(6), len)); | ||
| expect(fslv - sslv, LogicValue.ofBigInt(BigInt.from(-6), len)); | ||
|
|
||
| expect(fslv * sslv, LogicValue.ofBigInt(BigInt.from(-8), len)); | ||
|
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||
| expect(sblv + fblv, LogicValue.ofInt(2, len)); | ||
| expect(sblv - fblv, LogicValue.ofInt(6, len)); | ||
| expect(fblv - sblv, LogicValue.ofInt(-6, len)); | ||
|
|
||
| expect(sblv * fblv, LogicValue.ofInt(-8, len)); | ||
|
|
||
| expect(sblv + fblv, LogicValue.ofBigInt(BigInt.from(2), len)); | ||
| expect(sblv - fblv, LogicValue.ofBigInt(BigInt.from(6), len)); | ||
| expect(fblv - sblv, LogicValue.ofBigInt(BigInt.from(-6), len)); | ||
|
|
||
| expect(fblv * sblv, LogicValue.ofBigInt(BigInt.from(-8), len)); | ||
| }); | ||
|
|
||
| test('division test len=$len', () { | ||
| final negsfour = LogicValue.ofInt(-4, len); | ||
| final negbfour = LogicValue.ofBigInt(BigInt.from(-4), len); | ||
| final two = LogicValue.ofBigInt(BigInt.from(2), len); | ||
| expect(negsfour / two, LogicValue.ofInt(-4, len) >>> 1); | ||
| expect(negbfour / two, LogicValue.ofBigInt(BigInt.from(-4), len) >>> 1); | ||
| }); | ||
|
|
||
| test('modulo test len=$len', () { | ||
| final negsfive = LogicValue.ofInt(-5, len); | ||
| final negbfive = LogicValue.ofBigInt(BigInt.from(-5), len); | ||
| final two = LogicValue.ofBigInt(BigInt.from(2), len); | ||
| expect(negsfive % two, LogicValue.ofInt(1, len)); | ||
| expect(negbfive % two, LogicValue.ofBigInt(BigInt.from(1), len)); | ||
| }); | ||
|
|
||
| test('clog test len=$len', () { | ||
| final negnum = LogicValue.ofInt(-1, len); | ||
| expect(negnum.clog2(), LogicValue.ofInt(len, len)); | ||
| for (final l in [1, 2, 3]) { | ||
| expect((negnum >>> l).clog2(), LogicValue.ofInt(len - l, len)); | ||
| } | ||
| for (final l in [len - 5, len - 4, len - 3, len - 2]) { | ||
| final bignum = LogicValue.ofBigInt(BigInt.from(1) << l, len); | ||
| expect(bignum.clog2(), LogicValue.ofInt(l, len)); | ||
| if (len < 64) { | ||
| final smallnum = LogicValue.ofInt(1 << l, len); | ||
| expect(smallnum.clog2(), LogicValue.ofInt(l, len)); | ||
| } | ||
| } | ||
| for (final l in [len - 5, len - 4, len - 3]) { | ||
| final bignum = LogicValue.ofBigInt(BigInt.from(2) << l, len); | ||
| expect(bignum.clog2().toBigInt(), BigInt.from(l + 1)); | ||
| if (len < 64) { | ||
| final smallnum = LogicValue.ofInt(2 << l, len); | ||
| expect(smallnum.clog2(), LogicValue.ofInt(l + 1, len)); | ||
| } | ||
| } | ||
| for (final l in [len - 5, len - 4, len - 3]) { | ||
| final bignum = LogicValue.ofBigInt(BigInt.from(3) << l, len); | ||
| expect(bignum.clog2(), LogicValue.ofInt(l + 2, len)); | ||
| if (len < 64) { | ||
| final smallnum = LogicValue.ofInt(3 << l, len); | ||
| expect(smallnum.clog2(), LogicValue.ofInt(l + 2, len)); | ||
| } | ||
| } | ||
| }); | ||
| } | ||
| }); | ||
| } |