Search
lxdream.org :: lxdream/src/sh4/ia64abi.h
lxdream 0.9.1
released Jun 29
Download Now
filename src/sh4/ia64abi.h
changeset 570:d2893980fbf5
prev569:a1c49e1e8776
next571:9bc09948d0f2
author nkeynes
date Sun Jan 06 12:24:18 2008 +0000 (12 years ago)
branchlxdream-mmu
permissions -rw-r--r--
last change Change to generate different code for mmu on/off cases
view annotate diff log raw
     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.tlb_on = MMIO_READ(MMU,MMUCR)&MMUCR_AT;
   106     sh4_x86.tstate = TSTATE_NONE;
   107 }
   109 /**
   110  * Exit the block with sh4r.pc already written
   111  * Bytes: 15
   112  */
   113 void exit_block_pcset( sh4addr_t pc )
   114 {
   115     load_imm32( R_ECX, ((pc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
   116     ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) );    // 6
   117     load_spreg( R_EAX, REG_OFFSET(pc) );
   118     if( sh4_x86.tlb_on ) {
   119 	call_func1(xlat_get_code_by_vma,R_EAX);
   120     } else {
   121 	call_func1(xlat_get_code,R_EAX);
   122     }
   123     POP_r32(R_EBP);
   124     RET();
   125 }
   127 #define EXIT_BLOCK_SIZE 35
   128 /**
   129  * Exit the block to an absolute PC
   130  */
   131 void exit_block( sh4addr_t pc, sh4addr_t endpc )
   132 {
   133     load_imm32( R_ECX, pc );                            // 5
   134     store_spreg( R_ECX, REG_OFFSET(pc) );               // 3
   135     REXW(); MOV_moff32_EAX( xlat_get_lut_entry(pc) );
   136     REXW(); AND_imm8s_r32( 0xFC, R_EAX ); // 3
   137     load_imm32( R_ECX, ((endpc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
   138     ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) );     // 6
   139     POP_r32(R_EBP);
   140     RET();
   141 }
   143 /**
   144  * Write the block trailer (exception handling block)
   145  */
   146 void sh4_translate_end_block( sh4addr_t pc ) {
   147     if( sh4_x86.branch_taken == FALSE ) {
   148 	// Didn't exit unconditionally already, so write the termination here
   149 	exit_block( pc, pc );
   150     }
   151     if( sh4_x86.backpatch_posn != 0 ) {
   152 	unsigned int i;
   153 	// Raise exception
   154 	uint8_t *end_ptr = xlat_output;
   155 	load_spreg( R_ECX, REG_OFFSET(pc) );
   156 	ADD_r32_r32( R_EDX, R_ECX );
   157 	ADD_r32_r32( R_EDX, R_ECX );
   158 	store_spreg( R_ECX, REG_OFFSET(pc) );
   159 	MOV_moff32_EAX( &sh4_cpu_period );
   160 	MUL_r32( R_EDX );
   161 	ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) );
   163 	call_func0( sh4_raise_exception );
   164 	load_spreg( R_EAX, REG_OFFSET(pc) );
   165 	if( sh4_x86.tlb_on ) {
   166 	    call_func1(xlat_get_code_by_vma,R_EAX);
   167 	} else {
   168 	    call_func1(xlat_get_code,R_EAX);
   169 	}
   170 	POP_r32(R_EBP);
   171 	RET();
   173 	// Exception already raised - just cleanup
   174 	uint8_t *preexc_ptr = xlat_output;
   175 	load_imm32( R_ECX, sh4_x86.block_start_pc );
   176 	ADD_r32_r32( R_EDX, R_ECX );
   177 	ADD_r32_r32( R_EDX, R_ECX );
   178 	store_spreg( R_ECX, REG_OFFSET(spc) );
   179 	MOV_moff32_EAX( &sh4_cpu_period );
   180 	MUL_r32( R_EDX );
   181 	ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) );
   182 	load_spreg( R_EAX, REG_OFFSET(pc) );
   183 	if( sh4_x86.tlb_on ) {
   184 	    call_func1(xlat_get_code_by_vma,R_EAX);
   185 	} else {
   186 	    call_func1(xlat_get_code,R_EAX);
   187 	}
   188 	POP_r32(R_EBP);
   189 	RET();
   191 	for( i=0; i< sh4_x86.backpatch_posn; i++ ) {
   192 	    *sh4_x86.backpatch_list[i].fixup_addr =
   193 		xlat_output - ((uint8_t *)sh4_x86.backpatch_list[i].fixup_addr) - 4;
   194 	    if( sh4_x86.backpatch_list[i].exc_code == -1 ) {
   195 		load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount );
   196 		int rel = preexc_ptr - xlat_output;
   197 		JMP_rel(rel);
   198 	    } else {
   199 		load_imm32( R_EDI, sh4_x86.backpatch_list[i].exc_code );
   200 		load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount );
   201 		int rel = end_ptr - xlat_output;
   202 		JMP_rel(rel);
   203 	    }
   204 	}
   205     }
   206 }
   208 #endif
.