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/*
* Tiny Code Generator for QEMU
*
* Copyright ( c ) 2008 Fabrice Bellard
*
* Permission is hereby granted , free of charge , to any person obtaining a copy
* of this software and associated documentation files ( the "Software" ), to deal
* in the Software without restriction , including without limitation the rights
* to use , copy , modify , merge , publish , distribute , sublicense , and / or sell
* copies of the Software , and to permit persons to whom the Software is
* furnished to do so , subject to the following conditions :
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software .
*
* THE SOFTWARE IS PROVIDED "AS IS" , WITHOUT WARRANTY OF ANY KIND , EXPRESS OR
* IMPLIED , INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY ,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT . IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM , DAMAGES OR OTHER
* LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE , ARISING FROM ,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE .
*/
# include "tcg-target.h"
# if TCG_TARGET_REG_BITS == 32
typedef int32_t tcg_target_long ;
typedef uint32_t tcg_target_ulong ;
# define TCG_PRIlx PRIx32
# define TCG_PRIld PRId32
# elif TCG_TARGET_REG_BITS == 64
typedef int64_t tcg_target_long ;
typedef uint64_t tcg_target_ulong ;
# define TCG_PRIlx PRIx64
# define TCG_PRIld PRId64
# else
# error unsupported
# endif
# if TCG_TARGET_NB_REGS <= 32
typedef uint32_t TCGRegSet ;
# elif TCG_TARGET_NB_REGS <= 64
typedef uint64_t TCGRegSet ;
# else
# error unsupported
# endif
enum {
# define DEF ( s , n , copy_size ) INDEX_op_ ## s ,
# include "tcg-opc.h"
# undef DEF
NB_OPS ,
};
# define tcg_regset_clear ( d ) ( d ) = 0
# define tcg_regset_set ( d , s ) ( d ) = ( s )
# define tcg_regset_set32 ( d , reg , val32 ) ( d ) |= ( val32 ) << ( reg )
# define tcg_regset_set_reg ( d , r ) ( d ) |= 1 << ( r )
# define tcg_regset_reset_reg ( d , r ) ( d ) &= ~ ( 1 << ( r ))
# define tcg_regset_test_reg ( d , r ) ((( d ) >> ( r )) & 1 )
# define tcg_regset_or ( d , a , b ) ( d ) = ( a ) | ( b )
# define tcg_regset_and ( d , a , b ) ( d ) = ( a ) & ( b )
# define tcg_regset_andnot ( d , a , b ) ( d ) = ( a ) & ~ ( b )
# define tcg_regset_not ( d , a ) ( d ) = ~ ( a )
typedef struct TCGRelocation {
struct TCGRelocation * next ;
int type ;
uint8_t * ptr ;
tcg_target_long addend ;
} TCGRelocation ;
typedef struct TCGLabel {
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int has_value ;
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union {
tcg_target_ulong value ;
TCGRelocation * first_reloc ;
} u ;
} TCGLabel ;
typedef struct TCGPool {
struct TCGPool * next ;
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int size ;
uint8_t data [ 0 ] __attribute__ (( aligned ));
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} TCGPool ;
# define TCG_POOL_CHUNK_SIZE 32768
# define TCG_MAX_LABELS 512
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# define TCG_MAX_TEMPS 512
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/* when the size of the arguments of a called function is smaller than
this value , they are statically allocated in the TB stack frame */
# define TCG_STATIC_CALL_ARGS_SIZE 128
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typedef int TCGType ;
# define TCG_TYPE_I32 0
# define TCG_TYPE_I64 1
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# define TCG_TYPE_COUNT 2 /* number of different types */
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# if TCG_TARGET_REG_BITS == 32
# define TCG_TYPE_PTR TCG_TYPE_I32
# else
# define TCG_TYPE_PTR TCG_TYPE_I64
# endif
typedef tcg_target_ulong TCGArg ;
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/* Define a type and accessor macros for varables . Using a struct is
nice because it gives some level of type safely . Ideally the compiler
be able to see through all this . However in practice this is not true ,
expecially on targets with braindamaged ABIs ( e . g . i386 ).
We use plain int by default to avoid this runtime overhead .
Users of tcg_gen_ * don ' t need to know about any of this , and should
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treat TCGv as an opaque type .
In additon we do typechecking for different types of variables . TCGv_i32
and TCGv_i64 are 32 / 64 - bit variables respectively . TCGv and TCGv_ptr
are aliases for target_ulong and host pointer sized values respectively .
*/
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// # define DEBUG_TCGV 1
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# ifdef DEBUG_TCGV
typedef struct
{
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int i32 ;
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} TCGv_i32 ;
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typedef struct
{
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int i64 ;
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} TCGv_i64 ;
# define MAKE_TCGV_I32 ( i ) __extension__ \
({ TCGv_i32 make_tcgv_tmp = { i }; make_tcgv_tmp ;})
# define MAKE_TCGV_I64 ( i ) __extension__ \
({ TCGv_i64 make_tcgv_tmp = { i }; make_tcgv_tmp ;})
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# define GET_TCGV_I32 ( t ) (( t ). i32 )
# define GET_TCGV_I64 ( t ) (( t ). i64 )
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# if TCG_TARGET_REG_BITS == 32
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# define TCGV_LOW ( t ) MAKE_TCGV_I32 ( GET_TCGV_I64 ( t ))
# define TCGV_HIGH ( t ) MAKE_TCGV_I32 ( GET_TCGV_I64 ( t ) + 1 )
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# endif
# else /* !DEBUG_TCGV */
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typedef int TCGv_i32 ;
typedef int TCGv_i64 ;
# define MAKE_TCGV_I32 ( x ) ( x )
# define MAKE_TCGV_I64 ( x ) ( x )
# define GET_TCGV_I32 ( t ) ( t )
# define GET_TCGV_I64 ( t ) ( t )
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# if TCG_TARGET_REG_BITS == 32
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# define TCGV_LOW ( t ) ( t )
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# define TCGV_HIGH ( t ) (( t ) + 1 )
# endif
# endif /* DEBUG_TCGV */
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# define TCGV_EQUAL_I32 ( a , b ) ( GET_TCGV_I32 ( a ) == GET_TCGV_I32 ( b ))
# define TCGV_EQUAL_I64 ( a , b ) ( GET_TCGV_I64 ( a ) == GET_TCGV_I64 ( b ))
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/* Dummy definition to avoid compiler warnings. */
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# define TCGV_UNUSED_I32 ( x ) x = MAKE_TCGV_I32 ( - 1 )
# define TCGV_UNUSED_I64 ( x ) x = MAKE_TCGV_I64 ( - 1 )
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/* call flags */
# define TCG_CALL_TYPE_MASK 0x000f
# define TCG_CALL_TYPE_STD 0x0000 /* standard C call */
# define TCG_CALL_TYPE_REGPARM_1 0x0001 /* i386 style regparm call (1 reg) */
# define TCG_CALL_TYPE_REGPARM_2 0x0002 /* i386 style regparm call (2 regs) */
# define TCG_CALL_TYPE_REGPARM 0x0003 /* i386 style regparm call (3 regs) */
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/* A pure function only reads its arguments and TCG globals variables
and cannot raise exceptions . Hence a call to a pure function can be
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safely suppressed if the return value is not used . */
# define TCG_CALL_PURE 0x0010
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/* A const function only reads its arguments and does not use TCG
globals variables . Hence a call to such a function does not
save TCG globals variabes back to their canonical location . */
# define TCG_CALL_CONST 0x0020
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/* used to align parameters */
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# define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32 ( - 1 )
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# define TCG_CALL_DUMMY_ARG (( TCGArg )( - 1 ))
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typedef enum {
TCG_COND_EQ ,
TCG_COND_NE ,
TCG_COND_LT ,
TCG_COND_GE ,
TCG_COND_LE ,
TCG_COND_GT ,
/* unsigned */
TCG_COND_LTU ,
TCG_COND_GEU ,
TCG_COND_LEU ,
TCG_COND_GTU ,
} TCGCond ;
# define TEMP_VAL_DEAD 0
# define TEMP_VAL_REG 1
# define TEMP_VAL_MEM 2
# define TEMP_VAL_CONST 3
/* XXX: optimize memory layout */
typedef struct TCGTemp {
TCGType base_type ;
TCGType type ;
int val_type ;
int reg ;
tcg_target_long val ;
int mem_reg ;
tcg_target_long mem_offset ;
unsigned int fixed_reg : 1 ;
unsigned int mem_coherent : 1 ;
unsigned int mem_allocated : 1 ;
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unsigned int temp_local : 1 ; /* If true , the temp is saved accross
basic blocks . Otherwise , it is not
preserved accross basic blocks . */
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unsigned int temp_allocated : 1 ; /* never used for code gen */
/* index of next free temp of same base type, -1 if end */
int next_free_temp ;
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const char * name ;
} TCGTemp ;
typedef struct TCGHelperInfo {
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tcg_target_ulong func ;
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const char * name ;
} TCGHelperInfo ;
typedef struct TCGContext TCGContext ;
struct TCGContext {
uint8_t * pool_cur , * pool_end ;
TCGPool * pool_first , * pool_current ;
TCGLabel * labels ;
int nb_labels ;
TCGTemp * temps ; /* globals first, temps after */
int nb_globals ;
int nb_temps ;
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/* index of free temps, -1 if none */
int first_free_temp [ TCG_TYPE_COUNT * 2 ];
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/* goto_tb support */
uint8_t * code_buf ;
unsigned long * tb_next ;
uint16_t * tb_next_offset ;
uint16_t * tb_jmp_offset ; /* != NULL if USE_DIRECT_JUMP */
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/* liveness analysis */
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uint16_t * op_dead_iargs ; /* for each operation , each bit tells if the
corresponding input argument is dead */
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/* tells in which temporary a given register is . It does not take
into account fixed registers */
int reg_to_temp [ TCG_TARGET_NB_REGS ];
TCGRegSet reserved_regs ;
tcg_target_long current_frame_offset ;
tcg_target_long frame_start ;
tcg_target_long frame_end ;
int frame_reg ;
uint8_t * code_ptr ;
TCGTemp static_temps [ TCG_MAX_TEMPS ];
TCGHelperInfo * helpers ;
int nb_helpers ;
int allocated_helpers ;
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int helpers_sorted ;
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# ifdef CONFIG_PROFILER
/* profiling info */
int64_t tb_count1 ;
int64_t tb_count ;
int64_t op_count ; /* total insn count */
int op_count_max ; /* max insn per TB */
int64_t temp_count ;
int temp_count_max ;
int64_t del_op_count ;
int64_t code_in_len ;
int64_t code_out_len ;
int64_t interm_time ;
int64_t code_time ;
int64_t la_time ;
int64_t restore_count ;
int64_t restore_time ;
# endif
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};
extern TCGContext tcg_ctx ;
extern uint16_t * gen_opc_ptr ;
extern TCGArg * gen_opparam_ptr ;
extern uint16_t gen_opc_buf [];
extern TCGArg gen_opparam_buf [];
/* pool based memory allocation */
void * tcg_malloc_internal ( TCGContext * s , int size );
void tcg_pool_reset ( TCGContext * s );
void tcg_pool_delete ( TCGContext * s );
static inline void * tcg_malloc ( int size )
{
TCGContext * s = & tcg_ctx ;
uint8_t * ptr , * ptr_end ;
size = ( size + sizeof ( long ) - 1 ) & ~ ( sizeof ( long ) - 1 );
ptr = s -> pool_cur ;
ptr_end = ptr + size ;
if ( unlikely ( ptr_end > s -> pool_end )) {
return tcg_malloc_internal ( & tcg_ctx , size );
} else {
s -> pool_cur = ptr_end ;
return ptr ;
}
}
void tcg_context_init ( TCGContext * s );
void tcg_func_start ( TCGContext * s );
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int tcg_gen_code ( TCGContext * s , uint8_t * gen_code_buf );
int tcg_gen_code_search_pc ( TCGContext * s , uint8_t * gen_code_buf , long offset );
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void tcg_set_frame ( TCGContext * s , int reg ,
tcg_target_long start , tcg_target_long size );
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TCGv_i32 tcg_global_reg_new_i32 ( int reg , const char * name );
TCGv_i32 tcg_global_mem_new_i32 ( int reg , tcg_target_long offset ,
const char * name );
TCGv_i32 tcg_temp_new_internal_i32 ( int temp_local );
static inline TCGv_i32 tcg_temp_new_i32 ( void )
{
return tcg_temp_new_internal_i32 ( 0 );
}
static inline TCGv_i32 tcg_temp_local_new_i32 ( void )
{
return tcg_temp_new_internal_i32 ( 1 );
}
void tcg_temp_free_i32 ( TCGv_i32 arg );
char * tcg_get_arg_str_i32 ( TCGContext * s , char * buf , int buf_size , TCGv_i32 arg );
TCGv_i64 tcg_global_reg_new_i64 ( int reg , const char * name );
TCGv_i64 tcg_global_mem_new_i64 ( int reg , tcg_target_long offset ,
const char * name );
TCGv_i64 tcg_temp_new_internal_i64 ( int temp_local );
static inline TCGv_i64 tcg_temp_new_i64 ( void )
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{
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return tcg_temp_new_internal_i64 ( 0 );
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}
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static inline TCGv_i64 tcg_temp_local_new_i64 ( void )
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{
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return tcg_temp_new_internal_i64 ( 1 );
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}
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void tcg_temp_free_i64 ( TCGv_i64 arg );
char * tcg_get_arg_str_i64 ( TCGContext * s , char * buf , int buf_size , TCGv_i64 arg );
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void tcg_dump_info ( FILE * f ,
int ( * cpu_fprintf )( FILE * f , const char * fmt , ...));
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# define TCG_CT_ALIAS 0x80
# define TCG_CT_IALIAS 0x40
# define TCG_CT_REG 0x01
# define TCG_CT_CONST 0x02 /* any constant of register size */
typedef struct TCGArgConstraint {
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uint16_t ct ;
uint8_t alias_index ;
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union {
TCGRegSet regs ;
} u ;
} TCGArgConstraint ;
# define TCG_MAX_OP_ARGS 16
# define TCG_OPF_BB_END 0x01 /* instruction defines the end of a basic
block */
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# define TCG_OPF_CALL_CLOBBER 0x02 /* instruction clobbers call registers
and potentially update globals . */
# define TCG_OPF_SIDE_EFFECTS 0x04 /* instruction has side effects : it
cannot be removed if its output
are not used */
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typedef struct TCGOpDef {
const char * name ;
uint8_t nb_oargs , nb_iargs , nb_cargs , nb_args ;
uint8_t flags ;
uint16_t copy_size ;
TCGArgConstraint * args_ct ;
int * sorted_args ;
} TCGOpDef ;
typedef struct TCGTargetOpDef {
int op ;
const char * args_ct_str [ TCG_MAX_OP_ARGS ];
} TCGTargetOpDef ;
void tcg_target_init ( TCGContext * s );
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void tcg_target_qemu_prologue ( TCGContext * s );
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# define tcg_abort () \
do { \
fprintf ( stderr , "%s:%d: tcg fatal error \n " , __FILE__ , __LINE__ ); \
abort (); \
} while ( 0 )
void tcg_add_target_add_op_defs ( const TCGTargetOpDef * tdefs );
# if TCG_TARGET_REG_BITS == 32
# define tcg_const_ptr tcg_const_i32
# define tcg_add_ptr tcg_add_i32
# define tcg_sub_ptr tcg_sub_i32
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# define TCGv_ptr TCGv_i32
# define GET_TCGV_PTR GET_TCGV_I32
# define tcg_global_reg_new_ptr tcg_global_reg_new_i32
# define tcg_global_mem_new_ptr tcg_global_mem_new_i32
# define tcg_temp_new_ptr tcg_temp_new_i32
# define tcg_temp_free_ptr tcg_temp_free_i32
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# else
# define tcg_const_ptr tcg_const_i64
# define tcg_add_ptr tcg_add_i64
# define tcg_sub_ptr tcg_sub_i64
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# define TCGv_ptr TCGv_i64
# define GET_TCGV_PTR GET_TCGV_I64
# define tcg_global_reg_new_ptr tcg_global_reg_new_i64
# define tcg_global_mem_new_ptr tcg_global_mem_new_i64
# define tcg_temp_new_ptr tcg_temp_new_i64
# define tcg_temp_free_ptr tcg_temp_free_i64
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# endif
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void tcg_gen_callN ( TCGContext * s , TCGv_ptr func , unsigned int flags ,
int sizemask , TCGArg ret , int nargs , TCGArg * args );
void tcg_gen_shifti_i64 ( TCGv_i64 ret , TCGv_i64 arg1 ,
int c , int right , int arith );
/* only used for debugging purposes */
void tcg_register_helper ( void * func , const char * name );
const char * tcg_helper_get_name ( TCGContext * s , void * func );
void tcg_dump_ops ( TCGContext * s , FILE * outfile );
void dump_ops ( const uint16_t * opc_buf , const TCGArg * opparam_buf );
TCGv_i32 tcg_const_i32 ( int32_t val );
TCGv_i64 tcg_const_i64 ( int64_t val );
TCGv_i32 tcg_const_local_i32 ( int32_t val );
TCGv_i64 tcg_const_local_i64 ( int64_t val );
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void tcg_out_reloc ( TCGContext * s , uint8_t * code_ptr , int type ,
int label_index , long addend );
const TCGArg * tcg_gen_code_op ( TCGContext * s , int opc , const TCGArg * args1 ,
unsigned int dead_iargs );
/* tcg-runtime.c */
int64_t tcg_helper_shl_i64 ( int64_t arg1 , int64_t arg2 );
int64_t tcg_helper_shr_i64 ( int64_t arg1 , int64_t arg2 );
int64_t tcg_helper_sar_i64 ( int64_t arg1 , int64_t arg2 );
int64_t tcg_helper_div_i64 ( int64_t arg1 , int64_t arg2 );
int64_t tcg_helper_rem_i64 ( int64_t arg1 , int64_t arg2 );
uint64_t tcg_helper_divu_i64 ( uint64_t arg1 , uint64_t arg2 );
uint64_t tcg_helper_remu_i64 ( uint64_t arg1 , uint64_t arg2 );
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extern uint8_t code_gen_prologue [];
malc
authored
16 years ago
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# if defined ( _ARCH_PPC ) && ! defined ( _ARCH_PPC64 )
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# define tcg_qemu_tb_exec ( tb_ptr ) \
(( long REGPARM __attribute__ (( longcall )) ( * )( void * )) code_gen_prologue )( tb_ptr )
# else
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# define tcg_qemu_tb_exec ( tb_ptr ) (( long REGPARM ( * )( void * )) code_gen_prologue )( tb_ptr )
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# endif