7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "jni.h"
  27 #include "runtime/interfaceSupport.hpp"
  28 #include "runtime/sharedRuntime.hpp"
  29 #include "runtime/sharedRuntimeMath.hpp"
  30 
  31 // This file contains copies of the fdlibm routines used by
  32 // StrictMath. It turns out that it is almost always required to use
  33 // these runtime routines; the Intel CPU doesn't meet the Java
  34 // specification for sin/cos outside a certain limited argument range,
  35 // and the SPARC CPU doesn't appear to have sin/cos instructions. It
  36 // also turns out that avoiding the indirect call through function
  37 // pointer out to libjava.so in SharedRuntime speeds these routines up
  38 // by roughly 15% on both Win32/x86 and Solaris/SPARC.
  39 
  40 /*
  41  * __kernel_rem_pio2(x,y,e0,nx,prec,ipio2)
  42  * double x[],y[]; int e0,nx,prec; int ipio2[];
  43  *
  44  * __kernel_rem_pio2 return the last three digits of N with
  45  *              y = x - N*pi/2
  46  * so that |y| < pi/2.
  47  *

   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "jni.h"
  27 #include "runtime/interfaceSupport.inline.hpp"
  28 #include "runtime/sharedRuntime.hpp"
  29 #include "runtime/sharedRuntimeMath.hpp"
  30 
  31 // This file contains copies of the fdlibm routines used by
  32 // StrictMath. It turns out that it is almost always required to use
  33 // these runtime routines; the Intel CPU doesn't meet the Java
  34 // specification for sin/cos outside a certain limited argument range,
  35 // and the SPARC CPU doesn't appear to have sin/cos instructions. It
  36 // also turns out that avoiding the indirect call through function
  37 // pointer out to libjava.so in SharedRuntime speeds these routines up
  38 // by roughly 15% on both Win32/x86 and Solaris/SPARC.
  39 
  40 /*
  41  * __kernel_rem_pio2(x,y,e0,nx,prec,ipio2)
  42  * double x[],y[]; int e0,nx,prec; int ipio2[];
  43  *
  44  * __kernel_rem_pio2 return the last three digits of N with
  45  *              y = x - N*pi/2
  46  * so that |y| < pi/2.
  47  *