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lxdream.org :: lxdream/src/sh4/ia64abi.h
lxdream 0.9.1
released Jun 29
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filename src/sh4/ia64abi.h
changeset 561:533f6b478071
prev559:06714bc64271
next569:a1c49e1e8776
author nkeynes
date Tue Jan 01 05:08:38 2008 +0000 (12 years ago)
branchlxdream-mmu
permissions -rw-r--r--
last change Enable Id keyword on all source files
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     1 /**
     2  * $Id$
     3  * 
     4  * Provides the implementation for the ia32 ABI (eg prologue, epilogue, and
     5  * calling conventions)
     6  *
     7  * Copyright (c) 2007 Nathan Keynes.
     8  *
     9  * This program is free software; you can redistribute it and/or modify
    10  * it under the terms of the GNU General Public License as published by
    11  * the Free Software Foundation; either version 2 of the License, or
    12  * (at your option) any later version.
    13  *
    14  * This program is distributed in the hope that it will be useful,
    15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    17  * GNU General Public License for more details.
    18  */
    20 #ifndef __lxdream_x86_64abi_H
    21 #define __lxdream_x86_64abi_H 1
    24 #define load_ptr( reg, ptr ) load_imm64( reg, (uint64_t)ptr );
    26 /**
    27  * Note: clobbers EAX to make the indirect call - this isn't usually
    28  * a problem since the callee will usually clobber it anyway.
    29  * Size: 12 bytes
    30  */
    31 #define CALL_FUNC0_SIZE 12
    32 static inline void call_func0( void *ptr )
    33 {
    34     load_imm64(R_EAX, (uint64_t)ptr);
    35     CALL_r32(R_EAX);
    36 }
    38 #define CALL_FUNC1_SIZE 14
    39 static inline void call_func1( void *ptr, int arg1 )
    40 {
    41     MOV_r32_r32(arg1, R_EDI);
    42     call_func0(ptr);
    43 }
    45 #define CALL_FUNC2_SIZE 16
    46 static inline void call_func2( void *ptr, int arg1, int arg2 )
    47 {
    48     MOV_r32_r32(arg1, R_EDI);
    49     MOV_r32_r32(arg2, R_ESI);
    50     call_func0(ptr);
    51 }
    53 #define MEM_WRITE_DOUBLE_SIZE 39
    54 /**
    55  * Write a double (64-bit) value into memory, with the first word in arg2a, and
    56  * the second in arg2b
    57  */
    58 static inline void MEM_WRITE_DOUBLE( int addr, int arg2a, int arg2b )
    59 {
    60     PUSH_r32(arg2b);
    61     PUSH_r32(addr);
    62     call_func2(sh4_write_long, addr, arg2a);
    63     POP_r32(addr);
    64     POP_r32(arg2b);
    65     ADD_imm8s_r32(4, addr);
    66     call_func2(sh4_write_long, addr, arg2b);
    67 }
    69 #define MEM_READ_DOUBLE_SIZE 43
    70 /**
    71  * Read a double (64-bit) value from memory, writing the first word into arg2a
    72  * and the second into arg2b. The addr must not be in EAX
    73  */
    74 static inline void MEM_READ_DOUBLE( int addr, int arg2a, int arg2b )
    75 {
    76     REXW(); SUB_imm8s_r32( 8, R_ESP );
    77     PUSH_r32(addr);
    78     call_func1(sh4_read_long, addr);
    79     POP_r32(R_EDI);
    80     PUSH_r32(R_EAX);
    81     ADD_imm8s_r32(4, R_EDI);
    82     call_func0(sh4_read_long);
    83     MOV_r32_r32(R_EAX, arg2b);
    84     POP_r32(arg2a);
    85     REXW(); ADD_imm8s_r32( 8, R_ESP );
    86 }
    89 /**
    90  * Emit the 'start of block' assembly. Sets up the stack frame and save
    91  * SI/DI as required
    92  */
    93 void sh4_translate_begin_block( sh4addr_t pc ) 
    94 {
    95     PUSH_r32(R_EBP);
    96     /* mov &sh4r, ebp */
    97     load_ptr( R_EBP, &sh4r );
    99     sh4_x86.in_delay_slot = FALSE;
   100     sh4_x86.priv_checked = FALSE;
   101     sh4_x86.fpuen_checked = FALSE;
   102     sh4_x86.branch_taken = FALSE;
   103     sh4_x86.backpatch_posn = 0;
   104     sh4_x86.block_start_pc = pc;
   105     sh4_x86.tstate = TSTATE_NONE;
   106 }
   108 /**
   109  * Exit the block with sh4r.pc already written
   110  * Bytes: 15
   111  */
   112 void exit_block_pcset( pc )
   113 {
   114     load_imm32( R_ECX, ((pc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
   115     ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) );    // 6
   116     load_spreg( R_EAX, REG_OFFSET(pc) );
   117     call_func1(xlat_get_code,R_EAX);
   118     POP_r32(R_EBP);
   119     RET();
   120 }
   122 #define EXIT_BLOCK_SIZE 35
   123 /**
   124  * Exit the block to an absolute PC
   125  */
   126 void exit_block( sh4addr_t pc, sh4addr_t endpc )
   127 {
   128     load_imm32( R_ECX, pc );                            // 5
   129     store_spreg( R_ECX, REG_OFFSET(pc) );               // 3
   130     REXW(); MOV_moff32_EAX( xlat_get_lut_entry(pc) );
   131     REXW(); AND_imm8s_r32( 0xFC, R_EAX ); // 3
   132     load_imm32( R_ECX, ((endpc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
   133     ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) );     // 6
   134     POP_r32(R_EBP);
   135     RET();
   136 }
   138 /**
   139  * Write the block trailer (exception handling block)
   140  */
   141 void sh4_translate_end_block( sh4addr_t pc ) {
   142     if( sh4_x86.branch_taken == FALSE ) {
   143 	// Didn't exit unconditionally already, so write the termination here
   144 	exit_block( pc, pc );
   145     }
   146     if( sh4_x86.backpatch_posn != 0 ) {
   147 	unsigned int i;
   148 	// Raise exception
   149 	uint8_t *end_ptr = xlat_output;
   150 	load_spreg( R_ECX, REG_OFFSET(pc) );
   151 	ADD_r32_r32( R_EDX, R_ECX );
   152 	ADD_r32_r32( R_EDX, R_ECX );
   153 	store_spreg( R_ECX, REG_OFFSET(pc) );
   154 	MOV_moff32_EAX( &sh4_cpu_period );
   155 	MUL_r32( R_EDX );
   156 	ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) );
   158 	call_func0( sh4_raise_exception );
   159 	load_spreg( R_EAX, REG_OFFSET(pc) );
   160 	call_func1(xlat_get_code,R_EAX);
   161 	POP_r32(R_EBP);
   162 	RET();
   164 	// Exception already raised - just cleanup
   165 	uint8_t *preexc_ptr = xlat_output;
   166 	load_imm32( R_ECX, sh4_x86.block_start_pc );
   167 	ADD_r32_r32( R_EDX, R_ECX );
   168 	ADD_r32_r32( R_EDX, R_ECX );
   169 	store_spreg( R_ECX, REG_OFFSET(spc) );
   170 	MOV_moff32_EAX( &sh4_cpu_period );
   171 	MUL_r32( R_EDX );
   172 	ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) );
   173 	load_spreg( R_EAX, REG_OFFSET(pc) );
   174 	call_func1(xlat_get_code,R_EAX);
   175 	POP_r32(R_EBP);
   176 	RET();
   178 	for( i=0; i< sh4_x86.backpatch_posn; i++ ) {
   179 	    *sh4_x86.backpatch_list[i].fixup_addr =
   180 		xlat_output - ((uint8_t *)sh4_x86.backpatch_list[i].fixup_addr) - 4;
   181 	    if( sh4_x86.backpatch_list[i].exc_code == -1 ) {
   182 		load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount );
   183 		int rel = preexc_ptr - xlat_output;
   184 		JMP_rel(rel);
   185 	    } else {
   186 		load_imm32( R_EDI, sh4_x86.backpatch_list[i].exc_code );
   187 		load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount );
   188 		int rel = end_ptr - xlat_output;
   189 		JMP_rel(rel);
   190 	    }
   191 	}
   192     }
   193 }
   195 #endif
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