1 /* 2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 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 "prims/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. | 1 /* 2 * Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 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. |