JavaScriptCore-1218.35.tar.gz

[apple/javascriptcore.git] / runtime / MathObject.cpp

diff --git a/runtime/MathObject.cpp b/runtime/MathObject.cpp
index 854c2aece17e2525045085aa231b001b18c8ce26..71c53a3e456e60dff1447977678a006240d7d83c 100644 (file)
--- a/runtime/MathObject.cpp
+++ b/runtime/MathObject.cpp
@@ -32,7 +32,7 @@
 
 namespace JSC {
 
 
 namespace JSC {
 

-ASSERT_CLASS_FITS_IN_CELL(MathObject);
+ASSERT_HAS_TRIVIAL_DESTRUCTOR(MathObject);

 
 static EncodedJSValue JSC_HOST_CALL mathProtoFuncAbs(ExecState*);
 static EncodedJSValue JSC_HOST_CALL mathProtoFuncACos(ExecState*);
 
 static EncodedJSValue JSC_HOST_CALL mathProtoFuncAbs(ExecState*);
 static EncodedJSValue JSC_HOST_CALL mathProtoFuncACos(ExecState*);


@@ -52,6 +52,7 @@ static EncodedJSValue JSC_HOST_CALL mathProtoFuncRound(ExecState*);
 static EncodedJSValue JSC_HOST_CALL mathProtoFuncSin(ExecState*);
 static EncodedJSValue JSC_HOST_CALL mathProtoFuncSqrt(ExecState*);
 static EncodedJSValue JSC_HOST_CALL mathProtoFuncTan(ExecState*);
 static EncodedJSValue JSC_HOST_CALL mathProtoFuncSin(ExecState*);
 static EncodedJSValue JSC_HOST_CALL mathProtoFuncSqrt(ExecState*);
 static EncodedJSValue JSC_HOST_CALL mathProtoFuncTan(ExecState*);

+static EncodedJSValue JSC_HOST_CALL mathProtoFuncIMul(ExecState*);

 
 }
 
 
 }
 


@@ -59,9 +60,7 @@ static EncodedJSValue JSC_HOST_CALL mathProtoFuncTan(ExecState*);
 
 namespace JSC {
 
 
 namespace JSC {
 

-ASSERT_HAS_TRIVIAL_DESTRUCTOR(MathObject);
-
-const ClassInfo MathObject::s_info = { "Math", &JSNonFinalObject::s_info, 0, ExecState::mathTable, CREATE_METHOD_TABLE(MathObject) };
+const ClassInfo MathObject::s_info = { "Math", &Base::s_info, 0, ExecState::mathTable, CREATE_METHOD_TABLE(MathObject) };

 
 /* Source for MathObject.lut.h
 @begin mathTable
 
 /* Source for MathObject.lut.h
 @begin mathTable


@@ -83,35 +82,36 @@ const ClassInfo MathObject::s_info = { "Math", &JSNonFinalObject::s_info, 0, Exe
   sin           mathProtoFuncSin               DontEnum|Function 1
   sqrt          mathProtoFuncSqrt              DontEnum|Function 1
   tan           mathProtoFuncTan               DontEnum|Function 1
   sin           mathProtoFuncSin               DontEnum|Function 1
   sqrt          mathProtoFuncSqrt              DontEnum|Function 1
   tan           mathProtoFuncTan               DontEnum|Function 1

+  imul          mathProtoFuncIMul              DontEnum|Function 2

 @end
 */
 
 MathObject::MathObject(JSGlobalObject* globalObject, Structure* structure)
 @end
 */
 
 MathObject::MathObject(JSGlobalObject* globalObject, Structure* structure)

-    : JSNonFinalObject(globalObject->globalData(), structure)
+    : JSNonFinalObject(globalObject->vm(), structure)

 {
 }
 
 void MathObject::finishCreation(ExecState* exec, JSGlobalObject* globalObject)
 {
 {
 }
 
 void MathObject::finishCreation(ExecState* exec, JSGlobalObject* globalObject)
 {

-    Base::finishCreation(globalObject->globalData());
+    Base::finishCreation(globalObject->vm());

     ASSERT(inherits(&s_info));
 
     ASSERT(inherits(&s_info));
 

-    putDirectWithoutTransition(exec->globalData(), Identifier(exec, "E"), jsNumber(exp(1.0)), DontDelete | DontEnum | ReadOnly);
-    putDirectWithoutTransition(exec->globalData(), Identifier(exec, "LN2"), jsNumber(log(2.0)), DontDelete | DontEnum | ReadOnly);
-    putDirectWithoutTransition(exec->globalData(), Identifier(exec, "LN10"), jsNumber(log(10.0)), DontDelete | DontEnum | ReadOnly);
-    putDirectWithoutTransition(exec->globalData(), Identifier(exec, "LOG2E"), jsNumber(1.0 / log(2.0)), DontDelete | DontEnum | ReadOnly);
-    putDirectWithoutTransition(exec->globalData(), Identifier(exec, "LOG10E"), jsNumber(0.4342944819032518), DontDelete | DontEnum | ReadOnly); // See ECMA-262 15.8.1.5
-    putDirectWithoutTransition(exec->globalData(), Identifier(exec, "PI"), jsNumber(piDouble), DontDelete | DontEnum | ReadOnly);
-    putDirectWithoutTransition(exec->globalData(), Identifier(exec, "SQRT1_2"), jsNumber(sqrt(0.5)), DontDelete | DontEnum | ReadOnly);
-    putDirectWithoutTransition(exec->globalData(), Identifier(exec, "SQRT2"), jsNumber(sqrt(2.0)), DontDelete | DontEnum | ReadOnly);
+    putDirectWithoutTransition(exec->vm(), Identifier(exec, "E"), jsNumber(exp(1.0)), DontDelete | DontEnum | ReadOnly);
+    putDirectWithoutTransition(exec->vm(), Identifier(exec, "LN2"), jsNumber(log(2.0)), DontDelete | DontEnum | ReadOnly);
+    putDirectWithoutTransition(exec->vm(), Identifier(exec, "LN10"), jsNumber(log(10.0)), DontDelete | DontEnum | ReadOnly);
+    putDirectWithoutTransition(exec->vm(), Identifier(exec, "LOG2E"), jsNumber(1.0 / log(2.0)), DontDelete | DontEnum | ReadOnly);
+    putDirectWithoutTransition(exec->vm(), Identifier(exec, "LOG10E"), jsNumber(0.4342944819032518), DontDelete | DontEnum | ReadOnly); // See ECMA-262 15.8.1.5
+    putDirectWithoutTransition(exec->vm(), Identifier(exec, "PI"), jsNumber(piDouble), DontDelete | DontEnum | ReadOnly);
+    putDirectWithoutTransition(exec->vm(), Identifier(exec, "SQRT1_2"), jsNumber(sqrt(0.5)), DontDelete | DontEnum | ReadOnly);
+    putDirectWithoutTransition(exec->vm(), Identifier(exec, "SQRT2"), jsNumber(sqrt(2.0)), DontDelete | DontEnum | ReadOnly);

 }
 
 }
 

-bool MathObject::getOwnPropertySlot(JSCell* cell, ExecState* exec, const Identifier& propertyName, PropertySlot &slot)
+bool MathObject::getOwnPropertySlot(JSCell* cell, ExecState* exec, PropertyName propertyName, PropertySlot &slot)

 {
     return getStaticFunctionSlot<JSObject>(exec, ExecState::mathTable(exec), jsCast<MathObject*>(cell), propertyName, slot);
 }
 
 {
     return getStaticFunctionSlot<JSObject>(exec, ExecState::mathTable(exec), jsCast<MathObject*>(cell), propertyName, slot);
 }
 

-bool MathObject::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
+bool MathObject::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor)

 {
     return getStaticFunctionDescriptor<JSObject>(exec, ExecState::mathTable(exec), jsCast<MathObject*>(object), propertyName, descriptor);
 }
 {
     return getStaticFunctionDescriptor<JSObject>(exec, ExecState::mathTable(exec), jsCast<MathObject*>(object), propertyName, descriptor);
 }


@@ -176,11 +176,11 @@ EncodedJSValue JSC_HOST_CALL mathProtoFuncMax(ExecState* exec)
     double result = -std::numeric_limits<double>::infinity();
     for (unsigned k = 0; k < argsCount; ++k) {
         double val = exec->argument(k).toNumber(exec);
     double result = -std::numeric_limits<double>::infinity();
     for (unsigned k = 0; k < argsCount; ++k) {
         double val = exec->argument(k).toNumber(exec);

-        if (isnan(val)) {
-            result = std::numeric_limits<double>::quiet_NaN();
+        if (std::isnan(val)) {
+            result = QNaN;

             break;
         }
             break;
         }

-        if (val > result || (val == 0 && result == 0 && !signbit(val)))
+        if (val > result || (!val && !result && !std::signbit(val)))

             result = val;
     }
     return JSValue::encode(jsNumber(result));
             result = val;
     }
     return JSValue::encode(jsNumber(result));


@@ -192,17 +192,17 @@ EncodedJSValue JSC_HOST_CALL mathProtoFuncMin(ExecState* exec)
     double result = +std::numeric_limits<double>::infinity();
     for (unsigned k = 0; k < argsCount; ++k) {
         double val = exec->argument(k).toNumber(exec);
     double result = +std::numeric_limits<double>::infinity();
     for (unsigned k = 0; k < argsCount; ++k) {
         double val = exec->argument(k).toNumber(exec);

-        if (isnan(val)) {
-            result = std::numeric_limits<double>::quiet_NaN();
+        if (std::isnan(val)) {
+            result = QNaN;

             break;
         }
             break;
         }

-        if (val < result || (val == 0 && result == 0 && signbit(val)))
+        if (val < result || (!val && !result && std::signbit(val)))

             result = val;
     }
     return JSValue::encode(jsNumber(result));
 }
 
             result = val;
     }
     return JSValue::encode(jsNumber(result));
 }
 

-#if CPU(ARM_THUMB2)
+#if PLATFORM(IOS) && CPU(ARM_THUMB2)

 
 static double fdlibmPow(double x, double y);
 
 
 static double fdlibmPow(double x, double y);
 


@@ -246,9 +246,9 @@ EncodedJSValue JSC_HOST_CALL mathProtoFuncPow(ExecState* exec)
     double arg = exec->argument(0).toNumber(exec);
     double arg2 = exec->argument(1).toNumber(exec);
 
     double arg = exec->argument(0).toNumber(exec);
     double arg2 = exec->argument(1).toNumber(exec);
 

-    if (isnan(arg2))
+    if (std::isnan(arg2))

         return JSValue::encode(jsNaN());
         return JSValue::encode(jsNaN());

-    if (isinf(arg2) && fabs(arg) == 1)
+    if (std::isinf(arg2) && fabs(arg) == 1)

         return JSValue::encode(jsNaN());
     return JSValue::encode(jsNumber(mathPow(arg, arg2)));
 }
         return JSValue::encode(jsNaN());
     return JSValue::encode(jsNumber(mathPow(arg, arg2)));
 }


@@ -267,7 +267,7 @@ EncodedJSValue JSC_HOST_CALL mathProtoFuncRound(ExecState* exec)
 
 EncodedJSValue JSC_HOST_CALL mathProtoFuncSin(ExecState* exec)
 {
 
 EncodedJSValue JSC_HOST_CALL mathProtoFuncSin(ExecState* exec)
 {

-    return JSValue::encode(exec->globalData().cachedSin(exec->argument(0).toNumber(exec)));
+    return JSValue::encode(exec->vm().cachedSin(exec->argument(0).toNumber(exec)));

 }
 
 EncodedJSValue JSC_HOST_CALL mathProtoFuncSqrt(ExecState* exec)
 }
 
 EncodedJSValue JSC_HOST_CALL mathProtoFuncSqrt(ExecState* exec)


@@ -280,7 +280,16 @@ EncodedJSValue JSC_HOST_CALL mathProtoFuncTan(ExecState* exec)
     return JSValue::encode(jsDoubleNumber(tan(exec->argument(0).toNumber(exec))));
 }
 
     return JSValue::encode(jsDoubleNumber(tan(exec->argument(0).toNumber(exec))));
 }
 

-#if CPU(ARM_THUMB2)
+EncodedJSValue JSC_HOST_CALL mathProtoFuncIMul(ExecState* exec)
+{
+    int32_t left = exec->argument(0).toInt32(exec);
+    if (exec->hadException())
+        return JSValue::encode(jsNull());
+    int32_t right = exec->argument(1).toInt32(exec);
+    return JSValue::encode(jsNumber(left * right));
+}
+
+#if PLATFORM(IOS) && CPU(ARM_THUMB2)

 
 // The following code is taken from netlib.org:
 //   http://www.netlib.org/fdlibm/fdlibm.h
 
 // The following code is taken from netlib.org:
 //   http://www.netlib.org/fdlibm/fdlibm.h


@@ -311,41 +320,41 @@ EncodedJSValue JSC_HOST_CALL mathProtoFuncTan(ExecState* exec)
 
 /* __ieee754_pow(x,y) return x**y
  *
 
 /* __ieee754_pow(x,y) return x**y
  *

- *                   n
+ *              n

  * Method:  Let x =  2   * (1+f)
  * Method:  Let x =  2   * (1+f)

- *     1. Compute and return log2(x) in two pieces:
- *             log2(x) = w1 + w2,
- *        where w1 has 53-24 = 29 bit trailing zeros.
- *     2. Perform y*log2(x) = n+y' by simulating muti-precision 
- *        arithmetic, where |y'|<=0.5.
- *     3. Return x**y = 2**n*exp(y'*log2)
+ *    1. Compute and return log2(x) in two pieces:
+ *        log2(x) = w1 + w2,
+ *       where w1 has 53-24 = 29 bit trailing zeros.
+ *    2. Perform y*log2(x) = n+y' by simulating muti-precision 
+ *       arithmetic, where |y'|<=0.5.
+ *    3. Return x**y = 2**n*exp(y'*log2)

  *
  * Special cases:
  *
  * Special cases:

- *     1.  (anything) ** 0  is 1
- *     2.  (anything) ** 1  is itself
- *     3.  (anything) ** NAN is NAN
- *     4.  NAN ** (anything except 0) is NAN
- *     5.  +-(|x| > 1) **  +INF is +INF
- *     6.  +-(|x| > 1) **  -INF is +0
- *     7.  +-(|x| < 1) **  +INF is +0
- *     8.  +-(|x| < 1) **  -INF is +INF
- *     9.  +-1         ** +-INF is NAN
- *     10. +0 ** (+anything except 0, NAN)               is +0
- *     11. -0 ** (+anything except 0, NAN, odd integer)  is +0
- *     12. +0 ** (-anything except 0, NAN)               is +INF
- *     13. -0 ** (-anything except 0, NAN, odd integer)  is +INF
- *     14. -0 ** (odd integer) = -( +0 ** (odd integer) )
- *     15. +INF ** (+anything except 0,NAN) is +INF
- *     16. +INF ** (-anything except 0,NAN) is +0
- *     17. -INF ** (anything)  = -0 ** (-anything)
- *     18. (-anything) ** (integer) is (-1)**(integer)*(+anything**integer)
- *     19. (-anything except 0 and inf) ** (non-integer) is NAN
+ *    1.  (anything) ** 0  is 1
+ *    2.  (anything) ** 1  is itself
+ *    3.  (anything) ** NAN is NAN
+ *    4.  NAN ** (anything except 0) is NAN
+ *    5.  +-(|x| > 1) **  +INF is +INF
+ *    6.  +-(|x| > 1) **  -INF is +0
+ *    7.  +-(|x| < 1) **  +INF is +0
+ *    8.  +-(|x| < 1) **  -INF is +INF
+ *    9.  +-1         ** +-INF is NAN
+ *    10. +0 ** (+anything except 0, NAN)               is +0
+ *    11. -0 ** (+anything except 0, NAN, odd integer)  is +0
+ *    12. +0 ** (-anything except 0, NAN)               is +INF
+ *    13. -0 ** (-anything except 0, NAN, odd integer)  is +INF
+ *    14. -0 ** (odd integer) = -( +0 ** (odd integer) )
+ *    15. +INF ** (+anything except 0,NAN) is +INF
+ *    16. +INF ** (-anything except 0,NAN) is +0
+ *    17. -INF ** (anything)  = -0 ** (-anything)
+ *    18. (-anything) ** (integer) is (-1)**(integer)*(+anything**integer)
+ *    19. (-anything except 0 and inf) ** (non-integer) is NAN

  *
  * Accuracy:
  *
  * Accuracy:

- *     pow(x,y) returns x**y nearly rounded. In particular
- *                     pow(integer,integer)
- *     always returns the correct integer provided it is 
- *     representable.
+ *    pow(x,y) returns x**y nearly rounded. In particular
+ *            pow(integer,integer)
+ *    always returns the correct integer provided it is 
+ *    representable.

  *
  * Constants :
  * The hexadecimal values are the intended ones for the following 
  *
  * Constants :
  * The hexadecimal values are the intended ones for the following 


@@ -362,15 +371,15 @@ bp[] = {1.0, 1.5,},
 dp_h[] = { 0.0, 5.84962487220764160156e-01,}, /* 0x3FE2B803, 0x40000000 */
 dp_l[] = { 0.0, 1.35003920212974897128e-08,}, /* 0x3E4CFDEB, 0x43CFD006 */
 zero    =  0.0,
 dp_h[] = { 0.0, 5.84962487220764160156e-01,}, /* 0x3FE2B803, 0x40000000 */
 dp_l[] = { 0.0, 1.35003920212974897128e-08,}, /* 0x3E4CFDEB, 0x43CFD006 */
 zero    =  0.0,

-one    =  1.0,
-two    =  2.0,
-two53  =  9007199254740992.0,  /* 0x43400000, 0x00000000 */
-huge   =  1.0e300,
+one    =  1.0,
+two    =  2.0,
+two53    =  9007199254740992.0,    /* 0x43400000, 0x00000000 */
+huge    =  1.0e300,

 tiny    =  1.0e-300,
         /* for scalbn */
 two54   =  1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */
 twom54  =  5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */
 tiny    =  1.0e-300,
         /* for scalbn */
 two54   =  1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */
 twom54  =  5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */

-       /* poly coefs for (3/2)*(log(x)-2s-2/3*s**3 */
+    /* poly coefs for (3/2)*(log(x)-2s-2/3*s**3 */

 L1  =  5.99999999999994648725e-01, /* 0x3FE33333, 0x33333303 */
 L2  =  4.28571428578550184252e-01, /* 0x3FDB6DB6, 0xDB6FABFF */
 L3  =  3.33333329818377432918e-01, /* 0x3FD55555, 0x518F264D */
 L1  =  5.99999999999994648725e-01, /* 0x3FE33333, 0x33333303 */
 L2  =  4.28571428578550184252e-01, /* 0x3FDB6DB6, 0xDB6FABFF */
 L3  =  3.33333329818377432918e-01, /* 0x3FD55555, 0x518F264D */


@@ -395,236 +404,236 @@ ivln2_l  =  1.92596299112661746887e-08; /* 0x3E54AE0B, 0xF85DDF44 =1/ln2 tail*/
 
 inline double fdlibmScalbn (double x, int n)
 {
 
 inline double fdlibmScalbn (double x, int n)
 {

-       int  k,hx,lx;
-       hx = __HI(x);
-       lx = __LO(x);
-        k = (hx&0x7ff00000)>>20;               /* extract exponent */
-        if (k==0) {                            /* 0 or subnormal x */
+    int  k,hx,lx;
+    hx = __HI(x);
+    lx = __LO(x);
+        k = (hx&0x7ff00000)>>20;        /* extract exponent */
+        if (k==0) {                /* 0 or subnormal x */

             if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */
             if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */

-           x *= two54; 
-           hx = __HI(x);
-           k = ((hx&0x7ff00000)>>20) - 54; 
-            if (n< -50000) return tiny*x;      /*underflow*/
-           }
-        if (k==0x7ff) return x+x;              /* NaN or Inf */
+        x *= two54; 
+        hx = __HI(x);
+        k = ((hx&0x7ff00000)>>20) - 54; 
+            if (n< -50000) return tiny*x;     /*underflow*/
+        }
+        if (k==0x7ff) return x+x;        /* NaN or Inf */

         k = k+n; 
         if (k >  0x7fe) return huge*copysign(huge,x); /* overflow  */
         k = k+n; 
         if (k >  0x7fe) return huge*copysign(huge,x); /* overflow  */

-        if (k > 0)                             /* normal result */
-           {__HI(x) = (hx&0x800fffff)|(k<<20); return x;}
+        if (k > 0)                 /* normal result */
+        {__HI(x) = (hx&0x800fffff)|(k<<20); return x;}

         if (k <= -54) {
         if (k <= -54) {

-            if (n > 50000)     /* in case integer overflow in n+k */
-               return huge*copysign(huge,x);   /*overflow*/
-           else return tiny*copysign(tiny,x);  /*underflow*/
+            if (n > 50000)     /* in case integer overflow in n+k */
+        return huge*copysign(huge,x);    /*overflow*/
+        else return tiny*copysign(tiny,x);     /*underflow*/

         }
         }

-        k += 54;                               /* subnormal result */
+        k += 54;                /* subnormal result */

         __HI(x) = (hx&0x800fffff)|(k<<20);
         return x*twom54;
 }
 
 double fdlibmPow(double x, double y)
 {
         __HI(x) = (hx&0x800fffff)|(k<<20);
         return x*twom54;
 }
 
 double fdlibmPow(double x, double y)
 {

-       double z,ax,z_h,z_l,p_h,p_l;
-       double y1,t1,t2,r,s,t,u,v,w;
-       int i0,i1,i,j,k,yisint,n;
-       int hx,hy,ix,iy;
-       unsigned lx,ly;
+    double z,ax,z_h,z_l,p_h,p_l;
+    double y1,t1,t2,r,s,t,u,v,w;
+    int i0,i1,i,j,k,yisint,n;
+    int hx,hy,ix,iy;
+    unsigned lx,ly;

 
 

-       i0 = ((*(int*)&one)>>29)^1; i1=1-i0;
-       hx = __HI(x); lx = __LO(x);
-       hy = __HI(y); ly = __LO(y);
-       ix = hx&0x7fffffff;  iy = hy&0x7fffffff;
+    i0 = ((*(int*)&one)>>29)^1; i1=1-i0;
+    hx = __HI(x); lx = __LO(x);
+    hy = __HI(y); ly = __LO(y);
+    ix = hx&0x7fffffff;  iy = hy&0x7fffffff;

 
     /* y==zero: x**0 = 1 */
 
     /* y==zero: x**0 = 1 */

-       if((iy|ly)==0) return one;      
+    if((iy|ly)==0) return one;     

 
     /* +-NaN return x+y */
 
     /* +-NaN return x+y */

-       if(ix > 0x7ff00000 || ((ix==0x7ff00000)&&(lx!=0)) ||
-          iy > 0x7ff00000 || ((iy==0x7ff00000)&&(ly!=0))) 
-               return x+y;     
+    if(ix > 0x7ff00000 || ((ix==0x7ff00000)&&(lx!=0)) ||
+       iy > 0x7ff00000 || ((iy==0x7ff00000)&&(ly!=0))) 
+        return x+y;    

 
     /* determine if y is an odd int when x < 0
 
     /* determine if y is an odd int when x < 0

-     * yisint = 0      ... y is not an integer
-     * yisint = 1      ... y is an odd int
-     * yisint = 2      ... y is an even int
+     * yisint = 0    ... y is not an integer
+     * yisint = 1    ... y is an odd int
+     * yisint = 2    ... y is an even int

      */
      */

-       yisint  = 0;
-       if(hx<0) {      
-           if(iy>=0x43400000) yisint = 2; /* even integer y */
-           else if(iy>=0x3ff00000) {
-               k = (iy>>20)-0x3ff;        /* exponent */
-               if(k>20) {
-                   j = ly>>(52-k);
-                   if(static_cast<unsigned>(j<<(52-k))==ly) yisint = 2-(j&1);
-               } else if(ly==0) {
-                   j = iy>>(20-k);
-                   if((j<<(20-k))==iy) yisint = 2-(j&1);
-               }
-           }           
-       } 
+    yisint  = 0;
+    if(hx<0) {    
+        if(iy>=0x43400000) yisint = 2; /* even integer y */
+        else if(iy>=0x3ff00000) {
+        k = (iy>>20)-0x3ff;       /* exponent */
+        if(k>20) {
+            j = ly>>(52-k);
+            if(static_cast<unsigned>(j<<(52-k))==ly) yisint = 2-(j&1);
+        } else if(ly==0) {
+            j = iy>>(20-k);
+            if((j<<(20-k))==iy) yisint = 2-(j&1);
+        }
+        }        
+    } 

 
     /* special value of y */
 
     /* special value of y */

-       if(ly==0) {     
-           if (iy==0x7ff00000) {       /* y is +-inf */
-               if(((ix-0x3ff00000)|lx)==0)
-                   return  y - y;      /* inf**+-1 is NaN */
-               else if (ix >= 0x3ff00000)/* (|x|>1)**+-inf = inf,0 */
-                   return (hy>=0)? y: zero;
-               else                    /* (|x|<1)**-,+inf = inf,0 */
-                   return (hy<0)?-y: zero;
-           } 
-           if(iy==0x3ff00000) {        /* y is  +-1 */
-               if(hy<0) return one/x; else return x;
-           }
-           if(hy==0x40000000) return x*x; /* y is  2 */
-           if(hy==0x3fe00000) {        /* y is  0.5 */
-               if(hx>=0)       /* x >= +0 */
-               return sqrt(x); 
-           }
-       }
-
-       ax   = fabs(x);
+    if(ly==0) {     
+        if (iy==0x7ff00000) {    /* y is +-inf */
+            if(((ix-0x3ff00000)|lx)==0)
+            return  y - y;    /* inf**+-1 is NaN */
+            else if (ix >= 0x3ff00000)/* (|x|>1)**+-inf = inf,0 */
+            return (hy>=0)? y: zero;
+            else            /* (|x|<1)**-,+inf = inf,0 */
+            return (hy<0)?-y: zero;
+        } 
+        if(iy==0x3ff00000) {    /* y is  +-1 */
+        if(hy<0) return one/x; else return x;
+        }
+        if(hy==0x40000000) return x*x; /* y is  2 */
+        if(hy==0x3fe00000) {    /* y is  0.5 */
+        if(hx>=0)    /* x >= +0 */
+        return sqrt(x);    
+        }
+    }
+
+    ax   = fabs(x);

     /* special value of x */
     /* special value of x */

-       if(lx==0) {
-           if(ix==0x7ff00000||ix==0||ix==0x3ff00000){
-               z = ax;                 /*x is +-0,+-inf,+-1*/
-               if(hy<0) z = one/z;     /* z = (1/|x|) */
-               if(hx<0) {
-                   if(((ix-0x3ff00000)|yisint)==0) {
-                       z = (z-z)/(z-z); /* (-1)**non-int is NaN */
-                   } else if(yisint==1) 
-                       z = -z;         /* (x<0)**odd = -(|x|**odd) */
-               }
-               return z;
-           }
-       }
+    if(lx==0) {
+        if(ix==0x7ff00000||ix==0||ix==0x3ff00000){
+        z = ax;            /*x is +-0,+-inf,+-1*/
+        if(hy<0) z = one/z;    /* z = (1/|x|) */
+        if(hx<0) {
+            if(((ix-0x3ff00000)|yisint)==0) {
+            z = (z-z)/(z-z); /* (-1)**non-int is NaN */
+            } else if(yisint==1) 
+            z = -z;        /* (x<0)**odd = -(|x|**odd) */
+        }
+        return z;
+        }
+    }

     
     

-       n = (hx>>31)+1;
+    n = (hx>>31)+1;

 
     /* (x<0)**(non-int) is NaN */
 
     /* (x<0)**(non-int) is NaN */

-       if((n|yisint)==0) return (x-x)/(x-x);
+    if((n|yisint)==0) return (x-x)/(x-x);

 
 

-       s = one; /* s (sign of result -ve**odd) = -1 else = 1 */
-       if((n|(yisint-1))==0) s = -one;/* (-ve)**(odd int) */
+    s = one; /* s (sign of result -ve**odd) = -1 else = 1 */
+    if((n|(yisint-1))==0) s = -one;/* (-ve)**(odd int) */

 
     /* |y| is huge */
 
     /* |y| is huge */

-       if(iy>0x41e00000) { /* if |y| > 2**31 */
-           if(iy>0x43f00000){  /* if |y| > 2**64, must o/uflow */
-               if(ix<=0x3fefffff) return (hy<0)? huge*huge:tiny*tiny;
-               if(ix>=0x3ff00000) return (hy>0)? huge*huge:tiny*tiny;
-           }
-       /* over/underflow if x is not close to one */
-           if(ix<0x3fefffff) return (hy<0)? s*huge*huge:s*tiny*tiny;
-           if(ix>0x3ff00000) return (hy>0)? s*huge*huge:s*tiny*tiny;
-       /* now |1-x| is tiny <= 2**-20, suffice to compute 
-          log(x) by x-x^2/2+x^3/3-x^4/4 */
-           t = ax-one;         /* t has 20 trailing zeros */
-           w = (t*t)*(0.5-t*(0.3333333333333333333333-t*0.25));
-           u = ivln2_h*t;      /* ivln2_h has 21 sig. bits */
-           v = t*ivln2_l-w*ivln2;
-           t1 = u+v;
-           __LO(t1) = 0;
-           t2 = v-(t1-u);
-       } else {
-           double ss,s2,s_h,s_l,t_h,t_l;
-           n = 0;
-       /* take care subnormal number */
-           if(ix<0x00100000)
-               {ax *= two53; n -= 53; ix = __HI(ax); }
-           n  += ((ix)>>20)-0x3ff;
-           j  = ix&0x000fffff;
-       /* determine interval */
-           ix = j|0x3ff00000;          /* normalize ix */
-           if(j<=0x3988E) k=0;         /* |x|<sqrt(3/2) */
-           else if(j<0xBB67A) k=1;     /* |x|<sqrt(3)   */
-           else {k=0;n+=1;ix -= 0x00100000;}
-           __HI(ax) = ix;
-
-       /* compute ss = s_h+s_l = (x-1)/(x+1) or (x-1.5)/(x+1.5) */
-           u = ax-bp[k];               /* bp[0]=1.0, bp[1]=1.5 */
-           v = one/(ax+bp[k]);
-           ss = u*v;
-           s_h = ss;
-           __LO(s_h) = 0;
-       /* t_h=ax+bp[k] High */
-           t_h = zero;
-           __HI(t_h)=((ix>>1)|0x20000000)+0x00080000+(k<<18); 
-           t_l = ax - (t_h-bp[k]);
-           s_l = v*((u-s_h*t_h)-s_h*t_l);
-       /* compute log(ax) */
-           s2 = ss*ss;
-           r = s2*s2*(L1+s2*(L2+s2*(L3+s2*(L4+s2*(L5+s2*L6)))));
-           r += s_l*(s_h+ss);
-           s2  = s_h*s_h;
-           t_h = 3.0+s2+r;
-           __LO(t_h) = 0;
-           t_l = r-((t_h-3.0)-s2);
-       /* u+v = ss*(1+...) */
-           u = s_h*t_h;
-           v = s_l*t_h+t_l*ss;
-       /* 2/(3log2)*(ss+...) */
-           p_h = u+v;
-           __LO(p_h) = 0;
-           p_l = v-(p_h-u);
-           z_h = cp_h*p_h;             /* cp_h+cp_l = 2/(3*log2) */
-           z_l = cp_l*p_h+p_l*cp+dp_l[k];
-       /* log2(ax) = (ss+..)*2/(3*log2) = n + dp_h + z_h + z_l */
-           t = (double)n;
-           t1 = (((z_h+z_l)+dp_h[k])+t);
-           __LO(t1) = 0;
-           t2 = z_l-(((t1-t)-dp_h[k])-z_h);
-       }
+    if(iy>0x41e00000) { /* if |y| > 2**31 */
+        if(iy>0x43f00000){    /* if |y| > 2**64, must o/uflow */
+        if(ix<=0x3fefffff) return (hy<0)? huge*huge:tiny*tiny;
+        if(ix>=0x3ff00000) return (hy>0)? huge*huge:tiny*tiny;
+        }
+    /* over/underflow if x is not close to one */
+        if(ix<0x3fefffff) return (hy<0)? s*huge*huge:s*tiny*tiny;
+        if(ix>0x3ff00000) return (hy>0)? s*huge*huge:s*tiny*tiny;
+    /* now |1-x| is tiny <= 2**-20, suffice to compute 
+       log(x) by x-x^2/2+x^3/3-x^4/4 */
+        t = ax-one;        /* t has 20 trailing zeros */
+        w = (t*t)*(0.5-t*(0.3333333333333333333333-t*0.25));
+        u = ivln2_h*t;    /* ivln2_h has 21 sig. bits */
+        v = t*ivln2_l-w*ivln2;
+        t1 = u+v;
+        __LO(t1) = 0;
+        t2 = v-(t1-u);
+    } else {
+        double ss,s2,s_h,s_l,t_h,t_l;
+        n = 0;
+    /* take care subnormal number */
+        if(ix<0x00100000)
+        {ax *= two53; n -= 53; ix = __HI(ax); }
+        n  += ((ix)>>20)-0x3ff;
+        j  = ix&0x000fffff;
+    /* determine interval */
+        ix = j|0x3ff00000;        /* normalize ix */
+        if(j<=0x3988E) k=0;        /* |x|<sqrt(3/2) */
+        else if(j<0xBB67A) k=1;    /* |x|<sqrt(3)   */
+        else {k=0;n+=1;ix -= 0x00100000;}
+        __HI(ax) = ix;
+
+    /* compute ss = s_h+s_l = (x-1)/(x+1) or (x-1.5)/(x+1.5) */
+        u = ax-bp[k];        /* bp[0]=1.0, bp[1]=1.5 */
+        v = one/(ax+bp[k]);
+        ss = u*v;
+        s_h = ss;
+        __LO(s_h) = 0;
+    /* t_h=ax+bp[k] High */
+        t_h = zero;
+        __HI(t_h)=((ix>>1)|0x20000000)+0x00080000+(k<<18); 
+        t_l = ax - (t_h-bp[k]);
+        s_l = v*((u-s_h*t_h)-s_h*t_l);
+    /* compute log(ax) */
+        s2 = ss*ss;
+        r = s2*s2*(L1+s2*(L2+s2*(L3+s2*(L4+s2*(L5+s2*L6)))));
+        r += s_l*(s_h+ss);
+        s2  = s_h*s_h;
+        t_h = 3.0+s2+r;
+        __LO(t_h) = 0;
+        t_l = r-((t_h-3.0)-s2);
+    /* u+v = ss*(1+...) */
+        u = s_h*t_h;
+        v = s_l*t_h+t_l*ss;
+    /* 2/(3log2)*(ss+...) */
+        p_h = u+v;
+        __LO(p_h) = 0;
+        p_l = v-(p_h-u);
+        z_h = cp_h*p_h;        /* cp_h+cp_l = 2/(3*log2) */
+        z_l = cp_l*p_h+p_l*cp+dp_l[k];
+    /* log2(ax) = (ss+..)*2/(3*log2) = n + dp_h + z_h + z_l */
+        t = (double)n;
+        t1 = (((z_h+z_l)+dp_h[k])+t);
+        __LO(t1) = 0;
+        t2 = z_l-(((t1-t)-dp_h[k])-z_h);
+    }

 
     /* split up y into y1+y2 and compute (y1+y2)*(t1+t2) */
 
     /* split up y into y1+y2 and compute (y1+y2)*(t1+t2) */

-       y1  = y;
-       __LO(y1) = 0;
-       p_l = (y-y1)*t1+y*t2;
-       p_h = y1*t1;
-       z = p_l+p_h;
-       j = __HI(z);
-       i = __LO(z);
-       if (j>=0x40900000) {                            /* z >= 1024 */
-           if(((j-0x40900000)|i)!=0)                   /* if z > 1024 */
-               return s*huge*huge;                     /* overflow */
-           else {
-               if(p_l+ovt>z-p_h) return s*huge*huge;   /* overflow */
-           }
-       } else if((j&0x7fffffff)>=0x4090cc00 ) {        /* z <= -1075 */
-           if(((j-0xc090cc00)|i)!=0)           /* z < -1075 */
-               return s*tiny*tiny;             /* underflow */
-           else {
-               if(p_l<=z-p_h) return s*tiny*tiny;      /* underflow */
-           }
-       }
+    y1  = y;
+    __LO(y1) = 0;
+    p_l = (y-y1)*t1+y*t2;
+    p_h = y1*t1;
+    z = p_l+p_h;
+    j = __HI(z);
+    i = __LO(z);
+    if (j>=0x40900000) {                /* z >= 1024 */
+        if(((j-0x40900000)|i)!=0)            /* if z > 1024 */
+        return s*huge*huge;            /* overflow */
+        else {
+        if(p_l+ovt>z-p_h) return s*huge*huge;    /* overflow */
+        }
+    } else if((j&0x7fffffff)>=0x4090cc00 ) {    /* z <= -1075 */
+        if(((j-0xc090cc00)|i)!=0)         /* z < -1075 */
+        return s*tiny*tiny;        /* underflow */
+        else {
+        if(p_l<=z-p_h) return s*tiny*tiny;    /* underflow */
+        }
+    }

     /*
      * compute 2**(p_h+p_l)
      */
     /*
      * compute 2**(p_h+p_l)
      */

-       i = j&0x7fffffff;
-       k = (i>>20)-0x3ff;
-       n = 0;
-       if(i>0x3fe00000) {              /* if |z| > 0.5, set n = [z+0.5] */
-           n = j+(0x00100000>>(k+1));
-           k = ((n&0x7fffffff)>>20)-0x3ff;     /* new k for n */
-           t = zero;
-           __HI(t) = (n&~(0x000fffff>>k));
-           n = ((n&0x000fffff)|0x00100000)>>(20-k);
-           if(j<0) n = -n;
-           p_h -= t;
-       } 
-       t = p_l+p_h;
-       __LO(t) = 0;
-       u = t*lg2_h;
-       v = (p_l-(t-p_h))*lg2+t*lg2_l;
-       z = u+v;
-       w = v-(z-u);
-       t  = z*z;
-       t1  = z - t*(P1+t*(P2+t*(P3+t*(P4+t*P5))));
-       r  = (z*t1)/(t1-two)-(w+z*w);
-       z  = one-(r-z);
-       j  = __HI(z);
-       j += (n<<20);
-       if((j>>20)<=0) z = fdlibmScalbn(z,n);   /* subnormal output */
-       else __HI(z) += (n<<20);
-       return s*z;
+    i = j&0x7fffffff;
+    k = (i>>20)-0x3ff;
+    n = 0;
+    if(i>0x3fe00000) {        /* if |z| > 0.5, set n = [z+0.5] */
+        n = j+(0x00100000>>(k+1));
+        k = ((n&0x7fffffff)>>20)-0x3ff;    /* new k for n */
+        t = zero;
+        __HI(t) = (n&~(0x000fffff>>k));
+        n = ((n&0x000fffff)|0x00100000)>>(20-k);
+        if(j<0) n = -n;
+        p_h -= t;
+    } 
+    t = p_l+p_h;
+    __LO(t) = 0;
+    u = t*lg2_h;
+    v = (p_l-(t-p_h))*lg2+t*lg2_l;
+    z = u+v;
+    w = v-(z-u);
+    t  = z*z;
+    t1  = z - t*(P1+t*(P2+t*(P3+t*(P4+t*P5))));
+    r  = (z*t1)/(t1-two)-(w+z*w);
+    z  = one-(r-z);
+    j  = __HI(z);
+    j += (n<<20);
+    if((j>>20)<=0) z = fdlibmScalbn(z,n);    /* subnormal output */
+    else __HI(z) += (n<<20);
+    return s*z;

 }
 
 #endif
 }
 
 #endif