diff options
Diffstat (limited to 'src/lopcodes.js')
| -rw-r--r-- | src/lopcodes.js | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/lopcodes.js b/src/lopcodes.js index b7dfb0f..8df67a3 100644 --- a/src/lopcodes.js +++ b/src/lopcodes.js @@ -86,6 +86,16 @@ const MAXARG_A = ((1 << SIZE_A) - 1); const MAXARG_B = ((1 << SIZE_B) - 1); const MAXARG_C = ((1 << SIZE_C) - 1); +const BITRK = (1 << (SIZE_B - 1)); + +const ISK = function (x) { + return x & BITRK; +}; + +const INDEXK = function (r) { + return r & ~BITRK; +} + module.exports = { OpCodes: OpCodes, SIZE_C: SIZE_C, @@ -105,5 +115,8 @@ module.exports = { MAXARG_Ax: MAXARG_Ax, MAXARG_A: MAXARG_A, MAXARG_B: MAXARG_B, - MAXARG_C: MAXARG_C + MAXARG_C: MAXARG_C, + BITRK: BITRK, + ISK: ISK, + INDEXK: INDEXK };
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