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src/share/vm/opto/regmask.cpp

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  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;
  59   }




  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 #elif defined TARGET_ARCH_MODEL_aarch32
  41 # include "adfiles/ad_aarch32.hpp"
  42 #endif
  43 
  44 #define RM_SIZE _RM_SIZE /* a constant private to the class RegMask */
  45 
  46 //-------------Non-zero bit search methods used by RegMask---------------------
  47 // Find lowest 1, or return 32 if empty
  48 int find_lowest_bit( uint32 mask ) {
  49   int n = 0;
  50   if( (mask & 0xffff) == 0 ) {
  51     mask >>= 16;
  52     n += 16;
  53   }
  54   if( (mask & 0xff) == 0 ) {
  55     mask >>= 8;
  56     n += 8;
  57   }
  58   if( (mask & 0xf) == 0 ) {
  59     mask >>= 4;
  60     n += 4;
  61   }


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