// Implements Math.fround (20.2.2.16) up to step 3
bool
js::RoundFloat32(JSContext *cx, Handle<Value> v, float *out)
{
double d;
bool success = ToNumber(cx, v, &d);
*out = static_cast<float>(d);
return success;
}
bool
js_math_pow(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
double x;
if (!ToNumber(cx, args.get(0), &x))
return false;
double y;
if (!ToNumber(cx, args.get(1), &y))
return false;
double z = ecmaPow(x, y);
args.rval().setNumber(z);
return true;
}
bool
js::minmax_impl(JSContext *cx, bool max, HandleValue a, HandleValue b, MutableHandleValue res)
{
double x, y;
if (!ToNumber(cx, a, &x))
return false;
if (!ToNumber(cx, b, &y))
return false;
if (max)
res.setNumber(max_double(x, y));
else
res.setNumber(min_double(x, y));
return true;
}
bool
js::math_atan2(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
double y;
if (!ToNumber(cx, args.get(0), &y))
return false;
double x;
if (!ToNumber(cx, args.get(1), &x))
return false;
double z = ecmaAtan2(y, x);
args.rval().setDouble(z);
return true;
}
bool
js::math_atan2(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() <= 1) {
args.rval().setDouble(js_NaN);
return true;
}
double x, y;
if (!ToNumber(cx, args[0], &x) || !ToNumber(cx, args[1], &y))
return false;
double z = ecmaAtan2(x, y);
args.rval().setDouble(z);
return true;
}
bool
js::math_hypot_handle(JSContext* cx, HandleValueArray args, MutableHandleValue res)
{
// IonMonkey calls the system hypot function directly if two arguments are
// given. Do that here as well to get the same results.
if (args.length() == 2) {
double x, y;
if (!ToNumber(cx, args[0], &x))
return false;
if (!ToNumber(cx, args[1], &y))
return false;
double result = ecmaHypot(x, y);
res.setNumber(result);
return true;
}
bool isInfinite = false;
bool isNaN = false;
double scale = 0;
double sumsq = 1;
for (unsigned i = 0; i < args.length(); i++) {
double x;
if (!ToNumber(cx, args[i], &x))
return false;
isInfinite |= mozilla::IsInfinite(x);
isNaN |= mozilla::IsNaN(x);
if (isInfinite || isNaN)
continue;
hypot_step(scale, sumsq, x);
}
double result = isInfinite ? PositiveInfinity<double>() :
isNaN ? GenericNaN() :
scale * sqrt(sumsq);
res.setNumber(result);
return true;
}
bool
js::math_round_handle(JSContext *cx, HandleValue arg, MutableHandleValue res)
{
double d;
if (!ToNumber(cx, arg, &d))
return false;
d = math_round_impl(d);
res.setNumber(d);
return true;
}
bool
js::math_ceil_handle(JSContext* cx, HandleValue v, MutableHandleValue res)
{
double d;
if(!ToNumber(cx, v, &d))
return false;
double result = math_ceil_impl(d);
res.setNumber(result);
return true;
}
bool
js::math_floor_handle(JSContext *cx, HandleValue v, MutableHandleValue r)
{
double d;
if(!ToNumber(cx, v, &d))
return false;
double z = math_floor_impl(d);
r.setNumber(z);
return true;
}
bool
js::math_abs_handle(JSContext *cx, js::HandleValue v, js::MutableHandleValue r)
{
double x;
if (!ToNumber(cx, v, &x))
return false;
double z = Abs(x);
r.setNumber(z);
return true;
}
bool
js_math_pow(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() <= 1) {
args.rval().setDouble(js_NaN);
return true;
}
double x, y;
if (!ToNumber(cx, args[0], &x) || !ToNumber(cx, args[1], &y))
return false;
/*
* Special case for square roots. Note that pow(x, 0.5) != sqrt(x)
* when x = -0.0, so we have to guard for this.
*/
if (IsFinite(x) && x != 0.0) {
if (y == 0.5) {
args.rval().setNumber(sqrt(x));
return true;
}
if (y == -0.5) {
args.rval().setNumber(1.0/sqrt(x));
return true;
}
}
/* pow(x, +-0) is always 1, even for x = NaN. */
if (y == 0) {
args.rval().setInt32(1);
return true;
}
double z = ecmaPow(x, y);
args.rval().setNumber(z);
return true;
}
bool
js::math_min(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
double minval = PositiveInfinity<double>();
for (unsigned i = 0; i < args.length(); i++) {
double x;
if (!ToNumber(cx, args[i], &x))
return false;
minval = min_double(x, minval);
}
args.rval().setNumber(minval);
return true;
}
bool
js::math_sin_handle(JSContext* cx, HandleValue val, MutableHandleValue res)
{
double in;
if (!ToNumber(cx, val, &in))
return false;
MathCache* mathCache = cx->runtime()->getMathCache(cx);
if (!mathCache)
return false;
double out = math_sin_impl(mathCache, in);
res.setDouble(out);
return true;
}
bool
js::math_sqrt_handle(JSContext *cx, HandleValue number, MutableHandleValue result)
{
double x;
if (!ToNumber(cx, number, &x))
return false;
MathCache *mathCache = cx->runtime()->getMathCache(cx);
if (!mathCache)
return false;
double z = mathCache->lookup(sqrt, x, MathCache::Sqrt);
result.setDouble(z);
return true;
}
bool
js_math_min(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
double minval = PositiveInfinity<double>();
for (unsigned i = 0; i < args.length(); i++) {
double x;
if (!ToNumber(cx, args[i], &x))
return false;
// Math.min(num, NaN) => NaN, Math.min(-0, +0) => -0
if (x < minval || IsNaN(x) || (x == minval && IsNegativeZero(x)))
minval = x;
}
args.rval().setNumber(minval);
return true;
}
bool
js_math_max(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
double maxval = NegativeInfinity();
for (unsigned i = 0; i < args.length(); i++) {
double x;
if (!ToNumber(cx, args[i], &x))
return false;
// Math.max(num, NaN) => NaN, Math.max(-0, +0) => +0
if (x > maxval || IsNaN(x) || (x == maxval && IsNegative(maxval)))
maxval = x;
}
args.rval().setNumber(maxval);
return true;
}
bool
js::math_ceil(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setNaN();
return true;
}
double x;
if (!ToNumber(cx, args[0], &x))
return false;
double z = math_ceil_impl(x);
args.rval().setNumber(z);
return true;
}
bool
js_math_floor(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setDouble(js_NaN);
return true;
}
double x;
if (!ToNumber(cx, args[0], &x))
return false;
double z = js_math_floor_impl(x);
args.rval().setNumber(z);
return true;
}
bool
js::math_fround(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setNaN();
return true;
}
double x;
if (!ToNumber(cx, args[0], &x))
return false;
float f = x;
args.rval().setDouble(static_cast<double>(f));
return true;
}
static bool math_function(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setNumber(GenericNaN());
return true;
}
double x;
if (!ToNumber(cx, args[0], &x))
return false;
MathCache *mathCache = cx->runtime()->getMathCache(cx);
if (!mathCache)
return false;
double z = F(mathCache, x);
args.rval().setNumber(z);
return true;
}
bool
js::math_tan(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setNaN();
return true;
}
double x;
if (!ToNumber(cx, args[0], &x))
return false;
MathCache *mathCache = cx->runtime()->getMathCache(cx);
if (!mathCache)
return false;
double z = math_tan_impl(mathCache, x);
args.rval().setDouble(z);
return true;
}
bool
js_math_sqrt(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setDouble(js_NaN);
return true;
}
double x;
if (!ToNumber(cx, args[0], &x))
return false;
MathCache *mathCache = cx->runtime()->getMathCache(cx);
if (!mathCache)
return false;
double z = mathCache->lookup(sqrt, x);
args.rval().setDouble(z);
return true;
}