diff options
| author | Alon Zakai <alonzakai@gmail.com> | 2011-09-13 18:36:38 -0700 |
|---|---|---|
| committer | Alon Zakai <alonzakai@gmail.com> | 2011-09-13 18:36:38 -0700 |
| commit | 323bd5206e8b49d48e47cdd69d4b47b38aa384b9 (patch) | |
| tree | 7cd82b17b6f3699618f83ac31932bd35eaceddf7 | |
| parent | 7aa745d5bf521ae4124af8fc3c224dddbde490ee (diff) | |
faster shortcuts for sign/unsign
| -rw-r--r-- | src/parseTools.js | 22 | ||||
| -rw-r--r-- | src/preamble.js | 3 | ||||
| -rw-r--r-- | tests/runner.py | 1 |
3 files changed, 16 insertions, 10 deletions
diff --git a/src/parseTools.js b/src/parseTools.js index 73d7e647..a0bcf44f 100644 --- a/src/parseTools.js +++ b/src/parseTools.js @@ -1118,12 +1118,20 @@ function makeSignOp(value, type, op) { } if (!correctSigns() && !CHECK_SIGNS) return value; if (type in Runtime.INT_TYPES) { - // shortcuts for 32-bit case - if (bits === 32 && !CHECK_SIGNS) { - if (op === 're') { - return '((' + value + ')|0)'; - } else { - return '((' + value + ')>>>0)'; + // shortcuts + if (!CHECK_SIGNS) { + if (bits === 32) { + if (op === 're') { + return '((' + value + ')|0)'; + } else { + return '((' + value + ')>>>0)'; + } + } else if (bits < 32) { + if (op === 'un') { + return '((' + value + ')&' + (Math.pow(2, bits)-1) + ')'; + } else { + return '(tempInt=(' + value + '),(tempInt>=' + Math.pow(2, bits-1) + '?tempInt-' + Math.pow(2, bits) + ':tempInt))'; + } } } return full; @@ -1178,7 +1186,7 @@ function processMathop(item) { with(item) { var bitsLeft = ident2 ? ident2.substr(2, ident2.length-3) : null; // remove (i and ), to leave number. This value is important in float ops function integerizeBignum(value) { - return '(tempNumber=(' + value + '), tempNumber-tempNumber%1)'; + return '(tempBigInt=(' + value + '), tempBigInt-tempBigInt%1)'; } switch (op) { diff --git a/src/preamble.js b/src/preamble.js index c045bb2d..8c2a9dcb 100644 --- a/src/preamble.js +++ b/src/preamble.js @@ -288,8 +288,7 @@ var __ATEXIT__ = []; var ABORT = false; var undef = 0; -var tempValue; -var tempNumber; +var tempValue, tempInt, tempBigInt; function abort(text) { print(text + ':\n' + (new Error).stack); diff --git a/tests/runner.py b/tests/runner.py index 18f9e9d8..4c7be5ff 100644 --- a/tests/runner.py +++ b/tests/runner.py @@ -3095,7 +3095,6 @@ if 'benchmark' not in str(sys.argv): global CORRECT_SIGNS; CORRECT_SIGNS = 2 global CORRECT_SIGNS_LINES; CORRECT_SIGNS_LINES = auto_optimize_data['signs_lines'] - # TODO: Fast unSign for 8-bit values! global CORRECT_OVERFLOWS; CORRECT_OVERFLOWS = 0 global CORRECT_ROUNDINGS; CORRECT_ROUNDINGS = 0 global SAFE_HEAP; SAFE_HEAP = 0 # uses time.h to set random bytes, other stuff |