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src/share/vm/opto/regmask.cpp

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   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 "opto/compile.hpp"
  27 #include "opto/regmask.hpp"
  28 #ifdef TARGET_ARCH_MODEL_x86_32


  29 # include "adfiles/ad_x86_32.hpp"
  30 #endif
  31 #ifdef TARGET_ARCH_MODEL_x86_64
  32 # include "adfiles/ad_x86_64.hpp"
  33 #endif
  34 #ifdef TARGET_ARCH_MODEL_sparc
  35 # include "adfiles/ad_sparc.hpp"
  36 #endif
  37 #ifdef TARGET_ARCH_MODEL_zero
  38 # include "adfiles/ad_zero.hpp"
  39 #endif
  40 #ifdef TARGET_ARCH_MODEL_arm
  41 # include "adfiles/ad_arm.hpp"
  42 #endif
  43 #ifdef TARGET_ARCH_MODEL_ppc_32
  44 # include "adfiles/ad_ppc_32.hpp"
  45 #endif
  46 #ifdef TARGET_ARCH_MODEL_ppc_64
  47 # include "adfiles/ad_ppc_64.hpp"
  48 #endif
  49 
  50 #define RM_SIZE _RM_SIZE /* a constant private to the class RegMask */
  51 
  52 //-------------Non-zero bit search methods used by RegMask---------------------
  53 // Find lowest 1, or return 32 if empty
  54 int find_lowest_bit( uint32 mask ) {
  55   int n = 0;
  56   if( (mask & 0xffff) == 0 ) {
  57     mask >>= 16;
  58     n += 16;
  59   }
  60   if( (mask & 0xff) == 0 ) {
  61     mask >>= 8;
  62     n += 8;
  63   }
  64   if( (mask & 0xf) == 0 ) {
  65     mask >>= 4;
  66     n += 4;




   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 "opto/compile.hpp"
  27 #include "opto/regmask.hpp"
  28 #if defined AD_MD_HPP
  29 # include AD_MD_HPP
  30 #elif defined TARGET_ARCH_MODEL_x86_32
  31 # include "adfiles/ad_x86_32.hpp"
  32 #elif defined TARGET_ARCH_MODEL_x86_64

  33 # include "adfiles/ad_x86_64.hpp"
  34 #elif defined TARGET_ARCH_MODEL_sparc

  35 # include "adfiles/ad_sparc.hpp"
  36 #elif defined TARGET_ARCH_MODEL_zero

  37 # include "adfiles/ad_zero.hpp"
  38 #elif defined TARGET_ARCH_MODEL_ppc_64







  39 # include "adfiles/ad_ppc_64.hpp"
  40 #endif
  41 
  42 #define RM_SIZE _RM_SIZE /* a constant private to the class RegMask */
  43 
  44 //-------------Non-zero bit search methods used by RegMask---------------------
  45 // Find lowest 1, or return 32 if empty
  46 int find_lowest_bit( uint32 mask ) {
  47   int n = 0;
  48   if( (mask & 0xffff) == 0 ) {
  49     mask >>= 16;
  50     n += 16;
  51   }
  52   if( (mask & 0xff) == 0 ) {
  53     mask >>= 8;
  54     n += 8;
  55   }
  56   if( (mask & 0xf) == 0 ) {
  57     mask >>= 4;
  58     n += 4;


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