added native double round(double) function

src/namedef.h

@@ -361,6 +361,7 @@ xx(Tan)
 xx(CosH)
 xx(SinH)
 xx(TanH)
+xx(Round)
 xx(ATan2)
 xx(VectorAngle)
 xx(New)

src/scripting/backend/codegen.cpp

@@ -88,6 +88,8 @@ static const FLOP FxFlops[] =
 	{ NAME_CosH,	FLOP_COSH,		[](double v) { return g_cosh(v); } },
 	{ NAME_SinH,	FLOP_SINH,		[](double v) { return g_sinh(v); } },
 	{ NAME_TanH,	FLOP_TANH,		[](double v) { return g_tanh(v); } },
+
+	{ NAME_Round,	FLOP_ROUND,		[](double v) { return round(v);  } },
 };
 
 

src/scripting/backend/vmdisasm.cpp

@@ -181,6 +181,8 @@ static const char *const FlopNames[] =
 	"cosh",
 	"sinh",
 	"tanh",
+
+	"round",
 };
 
 static int print_reg(FILE *out, int col, int arg, int mode, int immshift, const VMScriptFunction *func);

src/scripting/vm/jit_math.cpp

@@ -985,6 +985,7 @@ void JitCompiler::EmitFLOP()
 		case FLOP_COSH:		func = g_cosh; break;
 		case FLOP_SINH:		func = g_sinh; break;
 		case FLOP_TANH:		func = g_tanh; break;
+		case FLOP_ROUND:	func = round; break;
 		}
 
 		auto result = newResultXmmSd();

src/scripting/vm/vmexec.h

@@ -1741,6 +1741,8 @@ static double DoFLOP(int flop, double v)
 	case FLOP_COSH:		return g_cosh(v);
 	case FLOP_SINH:		return g_sinh(v);
 	case FLOP_TANH:		return g_tanh(v);
+
+	case FLOP_ROUND:	return round(v);
 	}
 	assert(0);
 	return 0;

src/scripting/vm/vmintern.h

@@ -101,6 +101,8 @@ enum
 	FLOP_COSH,
 	FLOP_SINH,
 	FLOP_TANH,
+
+	FLOP_ROUND,
 };
 
 // Cast operations