1 /*
   2  * Copyright (c) 2002, 2009, 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 // Inline interpreter functions for IA32
  26 
  27 inline jfloat BytecodeInterpreter::VMfloatAdd(jfloat op1, jfloat op2) { return op1 + op2; }
  28 inline jfloat BytecodeInterpreter::VMfloatSub(jfloat op1, jfloat op2) { return op1 - op2; }
  29 inline jfloat BytecodeInterpreter::VMfloatMul(jfloat op1, jfloat op2) { return op1 * op2; }
  30 inline jfloat BytecodeInterpreter::VMfloatDiv(jfloat op1, jfloat op2) { return op1 / op2; }
  31 inline jfloat BytecodeInterpreter::VMfloatRem(jfloat op1, jfloat op2) { return fmod(op1, op2); }
  32 
  33 inline jfloat BytecodeInterpreter::VMfloatNeg(jfloat op) { return -op; }
  34 
  35 inline int32_t BytecodeInterpreter::VMfloatCompare(jfloat op1, jfloat op2, int32_t direction) {
  36   return ( op1 < op2 ? -1 :
  37                op1 > op2 ? 1 :
  38                    op1 == op2 ? 0 :
  39                        (direction == -1 || direction == 1) ? direction : 0);
  40 
  41 }
  42 
  43 inline void BytecodeInterpreter::VMmemCopy64(uint32_t to[2], const uint32_t from[2]) {
  44   // x86 can do unaligned copies but not 64bits at a time
  45   to[0] = from[0]; to[1] = from[1];
  46 }
  47 
  48 // The long operations depend on compiler support for "long long" on x86
  49 
  50 inline jlong BytecodeInterpreter::VMlongAdd(jlong op1, jlong op2) {
  51   return op1 + op2;
  52 }
  53 
  54 inline jlong BytecodeInterpreter::VMlongAnd(jlong op1, jlong op2) {
  55   return op1 & op2;
  56 }
  57 
  58 inline jlong BytecodeInterpreter::VMlongDiv(jlong op1, jlong op2) {
  59   // QQQ what about check and throw...
  60   return op1 / op2;
  61 }
  62 
  63 inline jlong BytecodeInterpreter::VMlongMul(jlong op1, jlong op2) {
  64   return op1 * op2;
  65 }
  66 
  67 inline jlong BytecodeInterpreter::VMlongOr(jlong op1, jlong op2) {
  68   return op1 | op2;
  69 }
  70 
  71 inline jlong BytecodeInterpreter::VMlongSub(jlong op1, jlong op2) {
  72   return op1 - op2;
  73 }
  74 
  75 inline jlong BytecodeInterpreter::VMlongXor(jlong op1, jlong op2) {
  76   return op1 ^ op2;
  77 }
  78 
  79 inline jlong BytecodeInterpreter::VMlongRem(jlong op1, jlong op2) {
  80   return op1 % op2;
  81 }
  82 
  83 inline jlong BytecodeInterpreter::VMlongUshr(jlong op1, jint op2) {
  84   // CVM did this 0x3f mask, is the really needed??? QQQ
  85   return ((unsigned long long) op1) >> (op2 & 0x3F);
  86 }
  87 
  88 inline jlong BytecodeInterpreter::VMlongShr(jlong op1, jint op2) {
  89   return op1 >> (op2 & 0x3F);
  90 }
  91 
  92 inline jlong BytecodeInterpreter::VMlongShl(jlong op1, jint op2) {
  93   return op1 << (op2 & 0x3F);
  94 }
  95 
  96 inline jlong BytecodeInterpreter::VMlongNeg(jlong op) {
  97   return -op;
  98 }
  99 
 100 inline jlong BytecodeInterpreter::VMlongNot(jlong op) {
 101   return ~op;
 102 }
 103 
 104 inline int32_t BytecodeInterpreter::VMlongLtz(jlong op) {
 105   return (op <= 0);
 106 }
 107 
 108 inline int32_t BytecodeInterpreter::VMlongGez(jlong op) {
 109   return (op >= 0);
 110 }
 111 
 112 inline int32_t BytecodeInterpreter::VMlongEqz(jlong op) {
 113   return (op == 0);
 114 }
 115 
 116 inline int32_t BytecodeInterpreter::VMlongEq(jlong op1, jlong op2) {
 117   return (op1 == op2);
 118 }
 119 
 120 inline int32_t BytecodeInterpreter::VMlongNe(jlong op1, jlong op2) {
 121   return (op1 != op2);
 122 }
 123 
 124 inline int32_t BytecodeInterpreter::VMlongGe(jlong op1, jlong op2) {
 125   return (op1 >= op2);
 126 }
 127 
 128 inline int32_t BytecodeInterpreter::VMlongLe(jlong op1, jlong op2) {
 129   return (op1 <= op2);
 130 }
 131 
 132 inline int32_t BytecodeInterpreter::VMlongLt(jlong op1, jlong op2) {
 133   return (op1 < op2);
 134 }
 135 
 136 inline int32_t BytecodeInterpreter::VMlongGt(jlong op1, jlong op2) {
 137   return (op1 > op2);
 138 }
 139 
 140 inline int32_t BytecodeInterpreter::VMlongCompare(jlong op1, jlong op2) {
 141   return (VMlongLt(op1, op2) ? -1 : VMlongGt(op1, op2) ? 1 : 0);
 142 }
 143 
 144 // Long conversions
 145 
 146 inline jdouble BytecodeInterpreter::VMlong2Double(jlong val) {
 147   return (jdouble) val;
 148 }
 149 
 150 inline jfloat BytecodeInterpreter::VMlong2Float(jlong val) {
 151   return (jfloat) val;
 152 }
 153 
 154 inline jint BytecodeInterpreter::VMlong2Int(jlong val) {
 155   return (jint) val;
 156 }
 157 
 158 // Double Arithmetic
 159 
 160 inline jdouble BytecodeInterpreter::VMdoubleAdd(jdouble op1, jdouble op2) {
 161   return op1 + op2;
 162 }
 163 
 164 inline jdouble BytecodeInterpreter::VMdoubleDiv(jdouble op1, jdouble op2) {
 165   // Divide by zero... QQQ
 166   return op1 / op2;
 167 }
 168 
 169 inline jdouble BytecodeInterpreter::VMdoubleMul(jdouble op1, jdouble op2) {
 170   return op1 * op2;
 171 }
 172 
 173 inline jdouble BytecodeInterpreter::VMdoubleNeg(jdouble op) {
 174   return -op;
 175 }
 176 
 177 inline jdouble BytecodeInterpreter::VMdoubleRem(jdouble op1, jdouble op2) {
 178   return fmod(op1, op2);
 179 }
 180 
 181 inline jdouble BytecodeInterpreter::VMdoubleSub(jdouble op1, jdouble op2) {
 182   return op1 - op2;
 183 }
 184 
 185 inline int32_t BytecodeInterpreter::VMdoubleCompare(jdouble op1, jdouble op2, int32_t direction) {
 186   return ( op1 < op2 ? -1 :
 187                op1 > op2 ? 1 :
 188                    op1 == op2 ? 0 :
 189                        (direction == -1 || direction == 1) ? direction : 0);
 190 }
 191 
 192 // Double Conversions
 193 
 194 inline jfloat BytecodeInterpreter::VMdouble2Float(jdouble val) {
 195   return (jfloat) val;
 196 }
 197 
 198 // Float Conversions
 199 
 200 inline jdouble BytecodeInterpreter::VMfloat2Double(jfloat op) {
 201   return (jdouble) op;
 202 }
 203 
 204 // Integer Arithmetic
 205 
 206 inline jint BytecodeInterpreter::VMintAdd(jint op1, jint op2) {
 207   return op1 + op2;
 208 }
 209 
 210 inline jint BytecodeInterpreter::VMintAnd(jint op1, jint op2) {
 211   return op1 & op2;
 212 }
 213 
 214 inline jint BytecodeInterpreter::VMintDiv(jint op1, jint op2) {
 215   /* it's possible we could catch this special case implicitly */
 216   if ((juint)op1 == 0x80000000 && op2 == -1) return op1;
 217   else return op1 / op2;
 218 }
 219 
 220 inline jint BytecodeInterpreter::VMintMul(jint op1, jint op2) {
 221   return op1 * op2;
 222 }
 223 
 224 inline jint BytecodeInterpreter::VMintNeg(jint op) {
 225   return -op;
 226 }
 227 
 228 inline jint BytecodeInterpreter::VMintOr(jint op1, jint op2) {
 229   return op1 | op2;
 230 }
 231 
 232 inline jint BytecodeInterpreter::VMintRem(jint op1, jint op2) {
 233   /* it's possible we could catch this special case implicitly */
 234   if ((juint)op1 == 0x80000000 && op2 == -1) return 0;
 235   else return op1 % op2;
 236 }
 237 
 238 inline jint BytecodeInterpreter::VMintShl(jint op1, jint op2) {
 239   return op1 << op2;
 240 }
 241 
 242 inline jint BytecodeInterpreter::VMintShr(jint op1, jint op2) {
 243   return op1 >> (op2 & 0x1f);
 244 }
 245 
 246 inline jint BytecodeInterpreter::VMintSub(jint op1, jint op2) {
 247   return op1 - op2;
 248 }
 249 
 250 inline jint BytecodeInterpreter::VMintUshr(jint op1, jint op2) {
 251   return ((juint) op1) >> (op2 & 0x1f);
 252 }
 253 
 254 inline jint BytecodeInterpreter::VMintXor(jint op1, jint op2) {
 255   return op1 ^ op2;
 256 }
 257 
 258 inline jdouble BytecodeInterpreter::VMint2Double(jint val) {
 259   return (jdouble) val;
 260 }
 261 
 262 inline jfloat BytecodeInterpreter::VMint2Float(jint val) {
 263   return (jfloat) val;
 264 }
 265 
 266 inline jlong BytecodeInterpreter::VMint2Long(jint val) {
 267   return (jlong) val;
 268 }
 269 
 270 inline jchar BytecodeInterpreter::VMint2Char(jint val) {
 271   return (jchar) val;
 272 }
 273 
 274 inline jshort BytecodeInterpreter::VMint2Short(jint val) {
 275   return (jshort) val;
 276 }
 277 
 278 inline jbyte BytecodeInterpreter::VMint2Byte(jint val) {
 279   return (jbyte) val;
 280 }