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-rw-r--r--src/lobject.js2
-rw-r--r--src/lvm.js4
2 files changed, 3 insertions, 3 deletions
diff --git a/src/lobject.js b/src/lobject.js
index 710a906..aeaa105 100644
--- a/src/lobject.js
+++ b/src/lobject.js
@@ -540,7 +540,7 @@ const intarith = function(L, op, v1, v2) {
case lua.LUA_OPADD: return (v1 + v2);
case lua.LUA_OPSUB: return (v1 - v2);
case lua.LUA_OPMUL: return (v1 * v2);
- case lua.LUA_OPMOD: return (v1 % v2);
+ case lua.LUA_OPMOD: return (v1 - Math.floor(v1 / v2) * v2); // % semantic on negative numbers is different in js
case lua.LUA_OPIDIV: return (v1 / v2);
case lua.LUA_OPBAND: return (v1 & v2);
case lua.LUA_OPBOR: return (v1 | v2);
diff --git a/src/lvm.js b/src/lvm.js
index 6febe4b..500c2e8 100644
--- a/src/lvm.js
+++ b/src/lvm.js
@@ -281,9 +281,9 @@ const luaV_execute = function(L) {
let numberop2 = tonumber(op2);
if (op1.ttisinteger() && op2.ttisinteger()) {
- L.stack[ra] = new TValue(CT.LUA_TNUMINT, (op1.value % op2.value));
+ L.stack[ra] = new TValue(CT.LUA_TNUMINT, (op1.value - Math.floor(op1.value / op2.value) * op2.value));
} else if (numberop1 !== false && numberop2 !== false) {
- L.stack[ra] = new TValue(CT.LUA_TNUMFLT, k[i.B].value % op2.value);
+ L.stack[ra] = new TValue(CT.LUA_TNUMFLT, (numberop1 - Math.floor(numberop1 / numberop2) * numberop2));
} else {
ltm.luaT_trybinTM(L, op1, op2, ra, ltm.TMS.TM_MOD);
base = ci.u.l.base;