jdk8-mips64-public/hotspot: src/cpu/sparc/vm/args.cc@710a3c8b516e (annotated)

src/cpu/sparc/vm/args.cc@710a3c8b516e (annotated)

src/cpu/sparc/vm/args.cc

Tue, 08 Aug 2017 15:57:29 +0800

author: aoqi
date: Tue, 08 Aug 2017 15:57:29 +0800
changeset 6876: 710a3c8b516e
parent 1907: c18cbe5936b8
parent 0: f90c822e73f8
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 2002, 2006, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include <stdio.h>
 #include <string.h>
 static const int R_O0_num = 1000;
 static const int R_I0_num = 2000;
 static const int R_F0_num = 3000;
 static const int R_F1_num = R_F0_num + 1;
 static const int R_F2_num = R_F0_num + 2;
 static const int STACK_num= 4000;
 static bool LP64 = false;
 static bool LONGS_IN_ONE_ENTRY = false;
 static const int Op_RegI = 'I';
 static const int Op_RegP = 'P';
 static const int Op_RegF = 'F';
 static const int Op_RegD = 'D';
 static const int Op_RegL = 'L';
 static const int SPARC_ARGS_IN_REGS_NUM=6;
 static void print_reg( int reg ) {
   if( reg == 0 )
     printf("__");               // halve's
   else if( reg >= STACK_num && reg < STACK_num+100 )
     printf("S%d_",reg - STACK_num);
   else if( reg >= R_F0_num && reg < R_F0_num+100 )
     printf("F%d_",reg - R_F0_num);
   else if( reg >= R_O0_num && reg < R_O0_num+100 ) {
     if( LONGS_IN_ONE_ENTRY ) {
       reg -= R_O0_num;
       printf("O%d",reg>>1);
       printf(reg&1 ? "H" : "L");
     } else
       printf("O%d_",reg - R_O0_num);
   } else
     printf("Wretched: %d\n", reg);
 }
 static void print_convention( int *sig, const char *s, int length ) {
   // Print it out
   for( int i = 0; i < length; i++) {
     if( sig[i] == 0 ) continue; // do not print 'halves'
     print_reg( sig[i] & 0xFFFF );
     int reg = sig[i] >> 16;
     if( reg ) {
       printf(":");
       print_reg( reg );
     } else {
       printf("    ");
     }
     printf("  ");
   }
   printf("\n");
 }
 static int INT_SCALE( int x ) {
   return LONGS_IN_ONE_ENTRY ? (x<<1) : x;
 }
 static void java_convention( int *sig, const char *s, int length ) {
   if( LP64 && !LONGS_IN_ONE_ENTRY ) {
     printf("LP64 and 2-reg longs not supported\n");
     return;
   }
   for( int i = 0; i < length; i++ )
     sig[i] = s[i];              // Reset sig array
   bool is_outgoing = true;
   int int_base = (is_outgoing ? R_O0_num : R_I0_num);
   // Convention is to pack the first 6 int/oop args into the first 6
   // registers (I0-I5), extras spill to the stack.  Then pack the first
   // 32 float args into F0-F31, extras spill to the stack.  Then pad
   // all register sets to align.  Then put longs and doubles into the
   // same registers as they fit, else spill to the stack.
   int int_reg_max = SPARC_ARGS_IN_REGS_NUM;
   int flt_reg_max = 32;
   // Count int/oop and float args.  See how many stack slots we'll need
   // and where the longs & doubles will go.
   int int_reg_cnt   = 0;
   int flt_reg_cnt   = 0;
   int stk_reg_pairs = 0;
   for( int i = 0; i < length; i++) {
     switch( sig[i] ) {
     case Op_RegL:               // Longs-in-1-reg compete with int args
       if( LONGS_IN_ONE_ENTRY ) {
         if( int_reg_cnt < int_reg_max ) int_reg_cnt++;
       }
       break;
     case Op_RegP:
       if( int_reg_cnt < int_reg_max ) int_reg_cnt++;
       else if( !LP64 )                stk_reg_pairs++;
       break;
     case Op_RegI:
       if( int_reg_cnt < int_reg_max ) int_reg_cnt++;
       else                            stk_reg_pairs++;
       break;
     case Op_RegF:
       if( flt_reg_cnt < flt_reg_max ) flt_reg_cnt++;
       else                            stk_reg_pairs++;
       break;
     }
   }
   // This is where the longs/doubles start on the stack.
   stk_reg_pairs = (stk_reg_pairs+1) & ~1; // Round
   int int_reg_pairs = (int_reg_cnt+1) & ~1; // 32-bit 2-reg longs only
   int flt_reg_pairs = (flt_reg_cnt+1) & ~1;
   int stk_reg = 0;
   int int_reg = 0;
   int flt_reg = 0;
   // Now do the signature layout
   for( int i = 0; i < length; i++) {
     int tmp = sig[i];
     if( tmp == Op_RegP )
       tmp = LP64 ? Op_RegL : Op_RegI;   // Treat ptrs and ints or long accordingly
     switch( tmp ) {
     case Op_RegI:
 //  case Op_RegP:
       if( int_reg < int_reg_max) tmp = INT_SCALE(int_reg++) + int_base;
       else                       tmp = STACK_num + stk_reg++;
       sig[i] = tmp;
       break;
     case Op_RegL:
       if( sig[i] != Op_RegP && sig[i+1] != 'h' ) { printf("expecting (h)alf, found %c\n", sig[i+1]); return; }
 //  case Op_RegP:
       if( LONGS_IN_ONE_ENTRY ) {
         if( int_reg < int_reg_max ) {
           tmp = INT_SCALE(int_reg++) + int_base;
         } else {
           tmp = STACK_num + stk_reg_pairs;
           stk_reg_pairs += 2;
         }
       } else {
         if( int_reg_pairs < int_reg_max ) {
           tmp = int_reg_pairs + int_base;
           int_reg_pairs += 2;
         } else {
           tmp = STACK_num + stk_reg_pairs;
           stk_reg_pairs += 2;
         }
       }
       sig[i] = tmp | (tmp+1)<<16; // Smear to pair
       break;
     case Op_RegF:
       sig[i] = (flt_reg < flt_reg_max) ? (R_F0_num + flt_reg++) : STACK_num + stk_reg++;
       break;
     case Op_RegD:
       if( sig[i+1] != 'h' ) { printf("expecting (h)alf, found %c\n", sig[i+1]); return; }
       if( flt_reg_pairs < flt_reg_max ) {
         tmp = R_F0_num + flt_reg_pairs;
         flt_reg_pairs += 2;
       } else {
         tmp = STACK_num + stk_reg_pairs;
         stk_reg_pairs += 2;
       }
       sig[i] = tmp | (tmp+1)<<16; // Smear to pair
       break;
     case 'h': sig[i] = 0; break;
     default:
       printf("Bad character: %c\n", sig[i] );
       return;
     }
   }
   printf("java ");
   printf(LP64 ? "LP64 " : "LP32 ");
   printf(LONGS_IN_ONE_ENTRY ? "long1: " : "long2: ");
   print_convention(sig,s,length);
 }
 static int int_stk_helper( int i ) {
   if( i < 6 ) return R_O0_num + (LONGS_IN_ONE_ENTRY ? i<<1 : i);
   else        return STACK_num + (LP64              ? i<<1 : i);
 }
 static void native_convention( int *sig, const char *s, int length ) {
   if( LP64 && !LONGS_IN_ONE_ENTRY ) {
     printf("LP64 and 2-reg longs not supported\n");
     return;
   }
   for( int i = 0; i < length; i++ )
     sig[i] = s[i];              // Reset sig array
   // The native convention is V8 if !LP64, which means the V8 convention is
   // used both with and without LONGS_IN_ONE_ENTRY, an unfortunate split.  The
   // same actual machine registers are used, but they are named differently in
   // the LONGS_IN_ONE_ENTRY mode.  The LP64 convention is the V9 convention
   // which is slightly more sane.
   if( LP64 ) {
     // V9 convention: All things "as-if" on double-wide stack slots.
     // Hoist any int/ptr/long's in the first 6 to int regs.
     // Hoist any flt/dbl's in the first 16 dbl regs.
     int j = 0;                  // Count of actual args, not HALVES
     for( int i=0; i<length; i++, j++ ) {
       int tmp;
       switch( sig[i] ) {
       case Op_RegI:
         sig[i] = int_stk_helper( j );
         break;
       case Op_RegL:
         if( sig[i+1] != 'h' ) { printf("expecting (h)alf, found %c\n", sig[i+1]); return; }
       case Op_RegP:
         tmp = int_stk_helper( j );
         sig[i] = tmp | ((tmp+1) << 16); // Smear to pair
         break;
       case Op_RegF:                 // V9ism: floats go in ODD registers
         sig[i] = ((j < 16) ? R_F1_num : (STACK_num + 1)) + (j<<1);
         break;
       case Op_RegD:                 // V9ism: doubles go in EVEN/ODD regs
         tmp    = ((j < 16) ? R_F0_num : STACK_num) + (j<<1);
         sig[i] = tmp | ((tmp+1) << 16); // Smear to pair
         break;
       case 'h': sig[i] = 0; j--; break; // Do not count HALVES
       default:
         printf("Bad character: %c\n", sig[i] );
         return;
       }
     }
   } else {
     // V8 convention: first 6 things in O-regs, rest on stack.
     // Alignment is willy-nilly.
     for( int i=0; i<length; i++ ) {
       int tmp;
       switch( sig[i] ) {
       case Op_RegI:
       case Op_RegP:
       case Op_RegF:
         sig[i] = int_stk_helper( i );
         break;
       case Op_RegL:
       case Op_RegD:
         if( sig[i+1] != 'h' ) { printf("expecting (h)alf, found %c\n", sig[i+1]); return; }
         tmp = int_stk_helper( i );
         sig[i] = tmp | (int_stk_helper( i+1 ) << 16);
         break;
       case 'h': sig[i] = 0; break;
       default:
         printf("Bad character: %c\n", sig[i] );
         return;
       }
     }
   }
   printf("natv ");
   printf(LP64 ? "LP64 " : "LP32 ");
   printf(LONGS_IN_ONE_ENTRY ? "long1: " : "long2: ");
   print_convention(sig,s,length);
 }
 int main( int argc, char **argv ) {
   if( argc != 2 ) {
     printf("Usage: args IPFLhDh... (Java argument string)\n");
     printf("Returns argument layout\n");
     return -1;
   }
   const char *s = argv[1];
   int length = strlen(s);
   int sig[1000];
   LP64 = false; LONGS_IN_ONE_ENTRY = false;
   java_convention( sig, s, length );
   LP64 = false; LONGS_IN_ONE_ENTRY = true;
   java_convention( sig, s, length );
   LP64 = true ; LONGS_IN_ONE_ENTRY = true;
   java_convention( sig, s, length );
   LP64 = false; LONGS_IN_ONE_ENTRY = false;
   native_convention( sig, s, length );
   LP64 = false; LONGS_IN_ONE_ENTRY = true;
   native_convention( sig, s, length );
   LP64 = true ; LONGS_IN_ONE_ENTRY = true;
   native_convention( sig, s, length );
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/sparc/vm/args.cc@710a3c8b516e (annotated)

src/cpu/sparc/vm/args.cc