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-rw-r--r--src/lopcodes.js34
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; \ No newline at end of file