diff options
Diffstat (limited to 'src/lopcodes.js')
| -rw-r--r-- | src/lopcodes.js | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/src/lopcodes.js b/src/lopcodes.js index 3f7f63b..bfcd993 100644 --- a/src/lopcodes.js +++ b/src/lopcodes.js @@ -209,6 +209,7 @@ const MAXARG_A = ((1 << SIZE_A) - 1); const MAXARG_B = ((1 << SIZE_B) - 1); const MAXARG_C = ((1 << SIZE_C) - 1); +/* this bit 1 means constant (0 means register) */ const BITRK = (1 << (SIZE_B - 1)); /* @@ -216,14 +217,22 @@ const BITRK = (1 << (SIZE_B - 1)); */ const NO_REG = MAXARG_A; +/* test whether value is a constant */ const ISK = function (x) { return x & BITRK; }; +/* gets the index of the constant */ const INDEXK = function (r) { return r & ~BITRK; }; +/* code a constant index as a RK value */ +const RKASK = function(x) { + return x | BITRK; +}; + + /* creates a mask with 'n' 1 bits at position 'p' */ const MASK1 = function(n, p) { return ((~((~0)<<(n)))<<(p)); @@ -267,7 +276,7 @@ const SETARG_sBx = function(i, b) { ** Pre-calculate all possible part of the instruction */ const fullins = function(ins) { - if (typeof ins === "integer") { + if (typeof ins === "number") { return { code: ins, opcode: (ins >> POS_OP) & MASK1(SIZE_OP, 0), @@ -280,13 +289,13 @@ const fullins = function(ins) { }; } else { let i = ins.code; - ins.opcode = (i >> POS_OP) & MASK1(SIZE_OP, 0), - ins.A = (i >> POS_A) & MASK1(SIZE_A, 0), - ins.B = (i >> POS_B) & MASK1(SIZE_B, 0), - ins.C = (i >> POS_C) & MASK1(SIZE_C, 0), - ins.Bx = (i >> POS_Bx) & MASK1(SIZE_Bx, 0), - ins.Ax = (i >> POS_Ax) & MASK1(SIZE_Ax, 0), - ins.sBx = ((i >> POS_Bx) & MASK1(SIZE_Bx, 0)) - MAXARG_sBx + ins.opcode = (i >> POS_OP) & MASK1(SIZE_OP, 0); + ins.A = (i >> POS_A) & MASK1(SIZE_A, 0); + ins.B = (i >> POS_B) & MASK1(SIZE_B, 0); + ins.C = (i >> POS_C) & MASK1(SIZE_C, 0); + ins.Bx = (i >> POS_Bx) & MASK1(SIZE_Bx, 0); + ins.Ax = (i >> POS_Ax) & MASK1(SIZE_Ax, 0); + ins.sBx = ((i >> POS_Bx) & MASK1(SIZE_Bx, 0)) - MAXARG_sBx; return ins; } }; @@ -320,6 +329,10 @@ module.exports.MAXARG_Bx = MAXARG_Bx; module.exports.MAXARG_C = MAXARG_C; module.exports.MAXARG_sBx = MAXARG_sBx; module.exports.NO_REG = NO_REG; +module.exports.OpArgK = OpArgK; +module.exports.OpArgN = OpArgN; +module.exports.OpArgR = OpArgR; +module.exports.OpArgU = OpArgU; module.exports.OpCodes = OpCodes; module.exports.OpCodesI = OpCodesI; module.exports.POS_A = POS_A; @@ -328,6 +341,7 @@ module.exports.POS_B = POS_B; module.exports.POS_Bx = POS_Bx; module.exports.POS_C = POS_C; module.exports.POS_OP = POS_OP; +module.exports.RKASK = RKASK; module.exports.SETARG_A = SETARG_A; module.exports.SETARG_Ax = SETARG_Ax; module.exports.SETARG_B = SETARG_B; @@ -344,5 +358,9 @@ module.exports.fullins = fullins; module.exports.getBMode = getBMode; module.exports.getCMode = getCMode; module.exports.getOpMode = getOpMode; +module.exports.iABC = iABC; +module.exports.iABx = iABx; +module.exports.iAsBx = iAsBx; +module.exports.iAx = iAx; module.exports.testAMode = testAMode; module.exports.testTMode = testTMode;
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