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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 .
*/
/* define it to suppress various consistency checks (faster) */
# define NDEBUG
/* define it to use liveness analysis (better code) */
# define USE_LIVENESS_ANALYSIS
# include < assert . h >
# include < stdarg . h >
# include < stdlib . h >
# include < stdio . h >
# include < string . h >
# include < inttypes . h >
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# ifdef _WIN32
# include < malloc . h >
# endif
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# ifdef _AIX
# include < alloca . h >
# endif
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# include "config.h"
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# include "qemu-common.h"
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# include "cache-utils.h"
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/* Note : the long term plan is to reduce the dependancies on the QEMU
CPU definitions . Currently they are used for qemu_ld / st
instructions */
# define NO_CPU_IO_DEFS
# include "cpu.h"
# include "exec-all.h"
# include "tcg-op.h"
# include "elf.h"
static void patch_reloc ( uint8_t * code_ptr , int type ,
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tcg_target_long value , tcg_target_long addend );
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TCGOpDef tcg_op_defs [] = {
# define DEF ( s , n , copy_size ) { # s , 0 , 0 , n , n , 0 , copy_size },
# define DEF2 ( s , iargs , oargs , cargs , flags ) { # s , iargs , oargs , cargs , iargs + oargs + cargs , flags , 0 },
# include "tcg-opc.h"
# undef DEF
# undef DEF2
};
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static TCGRegSet tcg_target_available_regs [ 2 ];
static TCGRegSet tcg_target_call_clobber_regs ;
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/* XXX: move that inside the context */
uint16_t * gen_opc_ptr ;
TCGArg * gen_opparam_ptr ;
static inline void tcg_out8 ( TCGContext * s , uint8_t v )
{
* s -> code_ptr ++ = v ;
}
static inline void tcg_out16 ( TCGContext * s , uint16_t v )
{
* ( uint16_t * ) s -> code_ptr = v ;
s -> code_ptr += 2 ;
}
static inline void tcg_out32 ( TCGContext * s , uint32_t v )
{
* ( uint32_t * ) s -> code_ptr = v ;
s -> code_ptr += 4 ;
}
/* label relocation processing */
void tcg_out_reloc ( TCGContext * s , uint8_t * code_ptr , int type ,
int label_index , long addend )
{
TCGLabel * l ;
TCGRelocation * r ;
l = & s -> labels [ label_index ];
if ( l -> has_value ) {
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/* FIXME : This may break relocations on RISC targets that
modify instruction fields in place . The caller may not have
written the initial value . */
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patch_reloc ( code_ptr , type , l -> u . value , addend );
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} else {
/* add a new relocation entry */
r = tcg_malloc ( sizeof ( TCGRelocation ));
r -> type = type ;
r -> ptr = code_ptr ;
r -> addend = addend ;
r -> next = l -> u . first_reloc ;
l -> u . first_reloc = r ;
}
}
static void tcg_out_label ( TCGContext * s , int label_index ,
tcg_target_long value )
{
TCGLabel * l ;
TCGRelocation * r ;
l = & s -> labels [ label_index ];
if ( l -> has_value )
tcg_abort ();
r = l -> u . first_reloc ;
while ( r != NULL ) {
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patch_reloc ( r -> ptr , r -> type , value , r -> addend );
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r = r -> next ;
}
l -> has_value = 1 ;
l -> u . value = value ;
}
int gen_new_label ( void )
{
TCGContext * s = & tcg_ctx ;
int idx ;
TCGLabel * l ;
if ( s -> nb_labels >= TCG_MAX_LABELS )
tcg_abort ();
idx = s -> nb_labels ++ ;
l = & s -> labels [ idx ];
l -> has_value = 0 ;
l -> u . first_reloc = NULL ;
return idx ;
}
# include "tcg-target.c"
/* pool based memory allocation */
void * tcg_malloc_internal ( TCGContext * s , int size )
{
TCGPool * p ;
int pool_size ;
if ( size > TCG_POOL_CHUNK_SIZE ) {
/* big malloc: insert a new pool (XXX: could optimize) */
p = qemu_malloc ( sizeof ( TCGPool ) + size );
p -> size = size ;
if ( s -> pool_current )
s -> pool_current -> next = p ;
else
s -> pool_first = p ;
p -> next = s -> pool_current ;
} else {
p = s -> pool_current ;
if ( ! p ) {
p = s -> pool_first ;
if ( ! p )
goto new_pool ;
} else {
if ( ! p -> next ) {
new_pool :
pool_size = TCG_POOL_CHUNK_SIZE ;
p = qemu_malloc ( sizeof ( TCGPool ) + pool_size );
p -> size = pool_size ;
p -> next = NULL ;
if ( s -> pool_current )
s -> pool_current -> next = p ;
else
s -> pool_first = p ;
} else {
p = p -> next ;
}
}
}
s -> pool_current = p ;
s -> pool_cur = p -> data + size ;
s -> pool_end = p -> data + p -> size ;
return p -> data ;
}
void tcg_pool_reset ( TCGContext * s )
{
s -> pool_cur = s -> pool_end = NULL ;
s -> pool_current = NULL ;
}
void tcg_context_init ( TCGContext * s )
{
int op , total_args , n ;
TCGOpDef * def ;
TCGArgConstraint * args_ct ;
int * sorted_args ;
memset ( s , 0 , sizeof ( * s ));
s -> temps = s -> static_temps ;
s -> nb_globals = 0 ;
/* Count total number of arguments and allocate the corresponding
space */
total_args = 0 ;
for ( op = 0 ; op < NB_OPS ; op ++ ) {
def = & tcg_op_defs [ op ];
n = def -> nb_iargs + def -> nb_oargs ;
total_args += n ;
}
args_ct = qemu_malloc ( sizeof ( TCGArgConstraint ) * total_args );
sorted_args = qemu_malloc ( sizeof ( int ) * total_args );
for ( op = 0 ; op < NB_OPS ; op ++ ) {
def = & tcg_op_defs [ op ];
def -> args_ct = args_ct ;
def -> sorted_args = sorted_args ;
n = def -> nb_iargs + def -> nb_oargs ;
sorted_args += n ;
args_ct += n ;
}
tcg_target_init ( s );
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/* init global prologue and epilogue */
s -> code_buf = code_gen_prologue ;
s -> code_ptr = s -> code_buf ;
tcg_target_qemu_prologue ( s );
flush_icache_range (( unsigned long ) s -> code_buf ,
( unsigned long ) s -> code_ptr );
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}
void tcg_set_frame ( TCGContext * s , int reg ,
tcg_target_long start , tcg_target_long size )
{
s -> frame_start = start ;
s -> frame_end = start + size ;
s -> frame_reg = reg ;
}
void tcg_func_start ( TCGContext * s )
{
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int i ;
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tcg_pool_reset ( s );
s -> nb_temps = s -> nb_globals ;
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for ( i = 0 ; i < ( TCG_TYPE_COUNT * 2 ); i ++ )
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s -> first_free_temp [ i ] = - 1 ;
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s -> labels = tcg_malloc ( sizeof ( TCGLabel ) * TCG_MAX_LABELS );
s -> nb_labels = 0 ;
s -> current_frame_offset = s -> frame_start ;
gen_opc_ptr = gen_opc_buf ;
gen_opparam_ptr = gen_opparam_buf ;
}
static inline void tcg_temp_alloc ( TCGContext * s , int n )
{
if ( n > TCG_MAX_TEMPS )
tcg_abort ();
}
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static inline int tcg_global_reg_new_internal ( TCGType type , int reg ,
const char * name )
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{
TCGContext * s = & tcg_ctx ;
TCGTemp * ts ;
int idx ;
# if TCG_TARGET_REG_BITS == 32
if ( type != TCG_TYPE_I32 )
tcg_abort ();
# endif
if ( tcg_regset_test_reg ( s -> reserved_regs , reg ))
tcg_abort ();
idx = s -> nb_globals ;
tcg_temp_alloc ( s , s -> nb_globals + 1 );
ts = & s -> temps [ s -> nb_globals ];
ts -> base_type = type ;
ts -> type = type ;
ts -> fixed_reg = 1 ;
ts -> reg = reg ;
ts -> name = name ;
s -> nb_globals ++ ;
tcg_regset_set_reg ( s -> reserved_regs , reg );
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return idx ;
}
TCGv_i32 tcg_global_reg_new_i32 ( int reg , const char * name )
{
int idx ;
idx = tcg_global_reg_new_internal ( TCG_TYPE_I32 , reg , name );
return MAKE_TCGV_I32 ( idx );
}
TCGv_i64 tcg_global_reg_new_i64 ( int reg , const char * name )
{
int idx ;
idx = tcg_global_reg_new_internal ( TCG_TYPE_I64 , reg , name );
return MAKE_TCGV_I64 ( idx );
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}
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# if TCG_TARGET_REG_BITS == 32
/* temporary hack to avoid register shortage for tcg_qemu_st64() */
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TCGv_i64 tcg_global_reg2_new_hack ( TCGType type , int reg1 , int reg2 ,
const char * name )
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{
TCGContext * s = & tcg_ctx ;
TCGTemp * ts ;
int idx ;
char buf [ 64 ];
if ( type != TCG_TYPE_I64 )
tcg_abort ();
idx = s -> nb_globals ;
tcg_temp_alloc ( s , s -> nb_globals + 2 );
ts = & s -> temps [ s -> nb_globals ];
ts -> base_type = type ;
ts -> type = TCG_TYPE_I32 ;
ts -> fixed_reg = 1 ;
ts -> reg = reg1 ;
pstrcpy ( buf , sizeof ( buf ), name );
pstrcat ( buf , sizeof ( buf ), "_0" );
ts -> name = strdup ( buf );
ts ++ ;
ts -> base_type = type ;
ts -> type = TCG_TYPE_I32 ;
ts -> fixed_reg = 1 ;
ts -> reg = reg2 ;
pstrcpy ( buf , sizeof ( buf ), name );
pstrcat ( buf , sizeof ( buf ), "_1" );
ts -> name = strdup ( buf );
s -> nb_globals += 2 ;
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return MAKE_TCGV_I64 ( idx );
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}
# endif
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static inline int tcg_global_mem_new_internal ( TCGType type , int reg ,
tcg_target_long offset ,
const char * name )
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{
TCGContext * s = & tcg_ctx ;
TCGTemp * ts ;
int idx ;
idx = s -> nb_globals ;
# if TCG_TARGET_REG_BITS == 32
if ( type == TCG_TYPE_I64 ) {
char buf [ 64 ];
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tcg_temp_alloc ( s , s -> nb_globals + 2 );
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ts = & s -> temps [ s -> nb_globals ];
ts -> base_type = type ;
ts -> type = TCG_TYPE_I32 ;
ts -> fixed_reg = 0 ;
ts -> mem_allocated = 1 ;
ts -> mem_reg = reg ;
# ifdef TCG_TARGET_WORDS_BIGENDIAN
ts -> mem_offset = offset + 4 ;
# else
ts -> mem_offset = offset ;
# endif
pstrcpy ( buf , sizeof ( buf ), name );
pstrcat ( buf , sizeof ( buf ), "_0" );
ts -> name = strdup ( buf );
ts ++ ;
ts -> base_type = type ;
ts -> type = TCG_TYPE_I32 ;
ts -> fixed_reg = 0 ;
ts -> mem_allocated = 1 ;
ts -> mem_reg = reg ;
# ifdef TCG_TARGET_WORDS_BIGENDIAN
ts -> mem_offset = offset ;
# else
ts -> mem_offset = offset + 4 ;
# endif
pstrcpy ( buf , sizeof ( buf ), name );
pstrcat ( buf , sizeof ( buf ), "_1" );
ts -> name = strdup ( buf );
s -> nb_globals += 2 ;
} else
# endif
{
tcg_temp_alloc ( s , s -> nb_globals + 1 );
ts = & s -> temps [ s -> nb_globals ];
ts -> base_type = type ;
ts -> type = type ;
ts -> fixed_reg = 0 ;
ts -> mem_allocated = 1 ;
ts -> mem_reg = reg ;
ts -> mem_offset = offset ;
ts -> name = name ;
s -> nb_globals ++ ;
}
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return idx ;
}
TCGv_i32 tcg_global_mem_new_i32 ( int reg , tcg_target_long offset ,
const char * name )
{
int idx ;
idx = tcg_global_mem_new_internal ( TCG_TYPE_I32 , reg , offset , name );
return MAKE_TCGV_I32 ( idx );
}
TCGv_i64 tcg_global_mem_new_i64 ( int reg , tcg_target_long offset ,
const char * name )
{
int idx ;
idx = tcg_global_mem_new_internal ( TCG_TYPE_I64 , reg , offset , name );
return MAKE_TCGV_I64 ( idx );
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}
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static inline int tcg_temp_new_internal ( TCGType type , int temp_local )
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{
TCGContext * s = & tcg_ctx ;
TCGTemp * ts ;
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int idx , k ;
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k = type ;
if ( temp_local )
k += TCG_TYPE_COUNT ;
idx = s -> first_free_temp [ k ];
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if ( idx != - 1 ) {
/* There is already an available temp with the
right type */
ts = & s -> temps [ idx ];
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s -> first_free_temp [ k ] = ts -> next_free_temp ;
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ts -> temp_allocated = 1 ;
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assert ( ts -> temp_local == temp_local );
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} else {
idx = s -> nb_temps ;
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# if TCG_TARGET_REG_BITS == 32
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if ( type == TCG_TYPE_I64 ) {
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tcg_temp_alloc ( s , s -> nb_temps + 2 );
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ts = & s -> temps [ s -> nb_temps ];
ts -> base_type = type ;
ts -> type = TCG_TYPE_I32 ;
ts -> temp_allocated = 1 ;
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ts -> temp_local = temp_local ;
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ts -> name = NULL ;
ts ++ ;
ts -> base_type = TCG_TYPE_I32 ;
ts -> type = TCG_TYPE_I32 ;
ts -> temp_allocated = 1 ;
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ts -> temp_local = temp_local ;
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ts -> name = NULL ;
s -> nb_temps += 2 ;
} else
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# endif
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{
tcg_temp_alloc ( s , s -> nb_temps + 1 );
ts = & s -> temps [ s -> nb_temps ];
ts -> base_type = type ;
ts -> type = type ;
ts -> temp_allocated = 1 ;
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ts -> temp_local = temp_local ;
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ts -> name = NULL ;
s -> nb_temps ++ ;
}
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}
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return idx ;
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}
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TCGv_i32 tcg_temp_new_internal_i32 ( int temp_local )
{
int idx ;
idx = tcg_temp_new_internal ( TCG_TYPE_I32 , temp_local );
return MAKE_TCGV_I32 ( idx );
}
TCGv_i64 tcg_temp_new_internal_i64 ( int temp_local )
{
int idx ;
idx = tcg_temp_new_internal ( TCG_TYPE_I64 , temp_local );
return MAKE_TCGV_I64 ( idx );
}
static inline void tcg_temp_free_internal ( int idx )
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{
TCGContext * s = & tcg_ctx ;
TCGTemp * ts ;
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int k ;
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assert ( idx >= s -> nb_globals && idx < s -> nb_temps );
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ts = & s -> temps [ idx ];
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assert ( ts -> temp_allocated != 0 );
ts -> temp_allocated = 0 ;
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k = ts -> base_type ;
if ( ts -> temp_local )
k += TCG_TYPE_COUNT ;
ts -> next_free_temp = s -> first_free_temp [ k ];
s -> first_free_temp [ k ] = idx ;
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}
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void tcg_temp_free_i32 ( TCGv_i32 arg )
{
tcg_temp_free_internal ( GET_TCGV_I32 ( arg ));
}
void tcg_temp_free_i64 ( TCGv_i64 arg )
{
tcg_temp_free_internal ( GET_TCGV_I64 ( arg ));
}
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TCGv_i32 tcg_const_i32 ( int32_t val )
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{
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TCGv_i32 t0 ;
t0 = tcg_temp_new_i32 ();
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tcg_gen_movi_i32 ( t0 , val );
return t0 ;
}
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TCGv_i64 tcg_const_i64 ( int64_t val )
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{
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TCGv_i64 t0 ;
t0 = tcg_temp_new_i64 ();
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tcg_gen_movi_i64 ( t0 , val );
return t0 ;
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}
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TCGv_i32 tcg_const_local_i32 ( int32_t val )
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{
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TCGv_i32 t0 ;
t0 = tcg_temp_local_new_i32 ();
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tcg_gen_movi_i32 ( t0 , val );
return t0 ;
}
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TCGv_i64 tcg_const_local_i64 ( int64_t val )
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{
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TCGv_i64 t0 ;
t0 = tcg_temp_local_new_i64 ();
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tcg_gen_movi_i64 ( t0 , val );
return t0 ;
}
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void tcg_register_helper ( void * func , const char * name )
{
TCGContext * s = & tcg_ctx ;
int n ;
if (( s -> nb_helpers + 1 ) > s -> allocated_helpers ) {
n = s -> allocated_helpers ;
if ( n == 0 ) {
n = 4 ;
} else {
n *= 2 ;
}
s -> helpers = realloc ( s -> helpers , n * sizeof ( TCGHelperInfo ));
s -> allocated_helpers = n ;
}
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s -> helpers [ s -> nb_helpers ]. func = ( tcg_target_ulong ) func ;
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s -> helpers [ s -> nb_helpers ]. name = name ;
s -> nb_helpers ++ ;
}
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/* Note : we convert the 64 bit args to 32 bit and do some alignment
and endian swap . Maybe it would be better to do the alignment
and endian swap in tcg_reg_alloc_call (). */
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void tcg_gen_callN ( TCGContext * s , TCGv_ptr func , unsigned int flags ,
int sizemask , TCGArg ret , int nargs , TCGArg * args )
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{
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int call_type ;
int i ;
int real_args ;
int nb_rets ;
TCGArg * nparam ;
* gen_opc_ptr ++ = INDEX_op_call ;
nparam = gen_opparam_ptr ++ ;
call_type = ( flags & TCG_CALL_TYPE_MASK );
if ( ret != TCG_CALL_DUMMY_ARG ) {
# if TCG_TARGET_REG_BITS < 64
if ( sizemask & 1 ) {
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# ifdef TCG_TARGET_WORDS_BIGENDIAN
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* gen_opparam_ptr ++ = ret + 1 ;
* gen_opparam_ptr ++ = ret ;
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# else
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* gen_opparam_ptr ++ = ret ;
* gen_opparam_ptr ++ = ret + 1 ;
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# endif
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nb_rets = 2 ;
} else
# endif
{
* gen_opparam_ptr ++ = ret ;
nb_rets = 1 ;
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}
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} else {
nb_rets = 0 ;
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}
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real_args = 0 ;
for ( i = 0 ; i < nargs ; i ++ ) {
# if TCG_TARGET_REG_BITS < 64
if ( sizemask & ( 2 << i )) {
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# ifdef TCG_TARGET_I386
/* REGPARM case : if the third parameter is 64 bit , it is
allocated on the stack */
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if ( i == 2 && call_type == TCG_CALL_TYPE_REGPARM ) {
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call_type = TCG_CALL_TYPE_REGPARM_2 ;
flags = ( flags & ~ TCG_CALL_TYPE_MASK ) | call_type ;
}
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# endif
623
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# ifdef TCG_TARGET_CALL_ALIGN_ARGS
/* some targets want aligned 64 bit args */
malc
authored
16 years ago
625
if ( real_args & 1 ) {
626
* gen_opparam_ptr ++ = TCG_CALL_DUMMY_ARG ;
malc
authored
16 years ago
627
real_args ++ ;
628
629
}
# endif
630
# ifdef TCG_TARGET_WORDS_BIGENDIAN
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* gen_opparam_ptr ++ = args [ i ] + 1 ;
* gen_opparam_ptr ++ = args [ i ];
633
# else
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635
* gen_opparam_ptr ++ = args [ i ];
* gen_opparam_ptr ++ = args [ i ] + 1 ;
636
# endif
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638
real_args += 2 ;
} else
639
# endif
640
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642
{
* gen_opparam_ptr ++ = args [ i ];
real_args ++ ;
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644
}
}
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652
* gen_opparam_ptr ++ = GET_TCGV_PTR ( func );
* gen_opparam_ptr ++ = flags ;
* nparam = ( nb_rets << 16 ) | ( real_args + 1 );
/* total parameters, needed to go backward in the instruction stream */
* gen_opparam_ptr ++ = 1 + nb_rets + real_args + 3 ;
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654
}
655
# if TCG_TARGET_REG_BITS == 32
656
void tcg_gen_shifti_i64 ( TCGv_i64 ret , TCGv_i64 arg1 ,
657
658
int c , int right , int arith )
{
659
if ( c == 0 ) {
660
tcg_gen_mov_i32 ( TCGV_LOW ( ret ), TCGV_LOW ( arg1 ));
661
662
tcg_gen_mov_i32 ( TCGV_HIGH ( ret ), TCGV_HIGH ( arg1 ));
} else if ( c >= 32 ) {
663
664
665
c -= 32 ;
if ( right ) {
if ( arith ) {
666
tcg_gen_sari_i32 ( TCGV_LOW ( ret ), TCGV_HIGH ( arg1 ), c );
667
tcg_gen_sari_i32 ( TCGV_HIGH ( ret ), TCGV_HIGH ( arg1 ), 31 );
668
} else {
669
tcg_gen_shri_i32 ( TCGV_LOW ( ret ), TCGV_HIGH ( arg1 ), c );
670
tcg_gen_movi_i32 ( TCGV_HIGH ( ret ), 0 );
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672
}
} else {
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674
tcg_gen_shli_i32 ( TCGV_HIGH ( ret ), TCGV_LOW ( arg1 ), c );
tcg_gen_movi_i32 ( TCGV_LOW ( ret ), 0 );
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676
}
} else {
677
TCGv_i32 t0 , t1 ;
678
679
680
t0 = tcg_temp_new_i32 ();
t1 = tcg_temp_new_i32 ();
681
if ( right ) {
682
tcg_gen_shli_i32 ( t0 , TCGV_HIGH ( arg1 ), 32 - c );
683
if ( arith )
684
tcg_gen_sari_i32 ( t1 , TCGV_HIGH ( arg1 ), c );
685
else
686
tcg_gen_shri_i32 ( t1 , TCGV_HIGH ( arg1 ), c );
687
688
tcg_gen_shri_i32 ( TCGV_LOW ( ret ), TCGV_LOW ( arg1 ), c );
tcg_gen_or_i32 ( TCGV_LOW ( ret ), TCGV_LOW ( ret ), t0 );
689
tcg_gen_mov_i32 ( TCGV_HIGH ( ret ), t1 );
690
} else {
691
tcg_gen_shri_i32 ( t0 , TCGV_LOW ( arg1 ), 32 - c );
692
/* Note: ret can be the same as arg1, so we use t1 */
693
tcg_gen_shli_i32 ( t1 , TCGV_LOW ( arg1 ), c );
694
695
tcg_gen_shli_i32 ( TCGV_HIGH ( ret ), TCGV_HIGH ( arg1 ), c );
tcg_gen_or_i32 ( TCGV_HIGH ( ret ), TCGV_HIGH ( ret ), t0 );
696
tcg_gen_mov_i32 ( TCGV_LOW ( ret ), t1 );
697
}
698
699
tcg_temp_free_i32 ( t0 );
tcg_temp_free_i32 ( t1 );
700
701
}
}
702
# endif
703
704
static void tcg_reg_alloc_start ( TCGContext * s )
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709
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713
714
715
{
int i ;
TCGTemp * ts ;
for ( i = 0 ; i < s -> nb_globals ; i ++ ) {
ts = & s -> temps [ i ];
if ( ts -> fixed_reg ) {
ts -> val_type = TEMP_VAL_REG ;
} else {
ts -> val_type = TEMP_VAL_MEM ;
}
}
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for ( i = s -> nb_globals ; i < s -> nb_temps ; i ++ ) {
ts = & s -> temps [ i ];
ts -> val_type = TEMP_VAL_DEAD ;
ts -> mem_allocated = 0 ;
ts -> fixed_reg = 0 ;
}
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723
724
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726
for ( i = 0 ; i < TCG_TARGET_NB_REGS ; i ++ ) {
s -> reg_to_temp [ i ] = - 1 ;
}
}
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728
static char * tcg_get_arg_str_idx ( TCGContext * s , char * buf , int buf_size ,
int idx )
729
730
{
TCGTemp * ts ;
731
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733
734
ts = & s -> temps [ idx ];
if ( idx < s -> nb_globals ) {
pstrcpy ( buf , buf_size , ts -> name );
735
} else {
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737
738
739
if ( ts -> temp_local )
snprintf ( buf , buf_size , "loc%d" , idx - s -> nb_globals );
else
snprintf ( buf , buf_size , "tmp%d" , idx - s -> nb_globals );
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741
742
743
}
return buf ;
}
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749
char * tcg_get_arg_str_i32 ( TCGContext * s , char * buf , int buf_size , TCGv_i32 arg )
{
return tcg_get_arg_str_idx ( s , buf , buf_size , GET_TCGV_I32 ( arg ));
}
char * tcg_get_arg_str_i64 ( TCGContext * s , char * buf , int buf_size , TCGv_i64 arg )
750
{
751
return tcg_get_arg_str_idx ( s , buf , buf_size , GET_TCGV_I64 ( arg ));
752
753
}
754
static int helper_cmp ( const void * p1 , const void * p2 )
755
{
756
757
758
759
760
761
762
763
const TCGHelperInfo * th1 = p1 ;
const TCGHelperInfo * th2 = p2 ;
if ( th1 -> func < th2 -> func )
return - 1 ;
else if ( th1 -> func == th2 -> func )
return 0 ;
else
return 1 ;
764
765
}
766
767
/* find helper definition (Note: A hash table would be better) */
static TCGHelperInfo * tcg_find_helper ( TCGContext * s , tcg_target_ulong val )
768
{
769
int m , m_min , m_max ;
770
TCGHelperInfo * th ;
771
tcg_target_ulong v ;
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
if ( unlikely ( ! s -> helpers_sorted )) {
qsort ( s -> helpers , s -> nb_helpers , sizeof ( TCGHelperInfo ),
helper_cmp );
s -> helpers_sorted = 1 ;
}
/* binary search */
m_min = 0 ;
m_max = s -> nb_helpers - 1 ;
while ( m_min <= m_max ) {
m = ( m_min + m_max ) >> 1 ;
th = & s -> helpers [ m ];
v = th -> func ;
if ( v == val )
return th ;
else if ( val < v ) {
m_max = m - 1 ;
} else {
m_min = m + 1 ;
792
793
}
}
794
return NULL ;
795
796
}
797
798
799
800
801
802
803
804
805
806
807
808
809
810
static const char * const cond_name [] =
{
[ TCG_COND_EQ ] = "eq" ,
[ TCG_COND_NE ] = "ne" ,
[ TCG_COND_LT ] = "lt" ,
[ TCG_COND_GE ] = "ge" ,
[ TCG_COND_LE ] = "le" ,
[ TCG_COND_GT ] = "gt" ,
[ TCG_COND_LTU ] = "ltu" ,
[ TCG_COND_GEU ] = "geu" ,
[ TCG_COND_LEU ] = "leu" ,
[ TCG_COND_GTU ] = "gtu"
};
811
812
813
814
815
void tcg_dump_ops ( TCGContext * s , FILE * outfile )
{
const uint16_t * opc_ptr ;
const TCGArg * args ;
TCGArg arg ;
816
int c , i , k , nb_oargs , nb_iargs , nb_cargs , first_insn ;
817
818
819
const TCGOpDef * def ;
char buf [ 128 ];
820
first_insn = 1 ;
821
822
823
824
825
opc_ptr = gen_opc_buf ;
args = gen_opparam_buf ;
while ( opc_ptr < gen_opc_ptr ) {
c = * opc_ptr ++ ;
def = & tcg_op_defs [ c ];
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
if ( c == INDEX_op_debug_insn_start ) {
uint64_t pc ;
# if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
pc = (( uint64_t ) args [ 1 ] << 32 ) | args [ 0 ];
# else
pc = args [ 0 ];
# endif
if ( ! first_insn )
fprintf ( outfile , " \n " );
fprintf ( outfile , " ---- 0x%" PRIx64 , pc );
first_insn = 0 ;
nb_oargs = def -> nb_oargs ;
nb_iargs = def -> nb_iargs ;
nb_cargs = def -> nb_cargs ;
} else if ( c == INDEX_op_call ) {
841
TCGArg arg ;
842
843
844
845
846
847
848
/* variable number of arguments */
arg = * args ++ ;
nb_oargs = arg >> 16 ;
nb_iargs = arg & 0xffff ;
nb_cargs = def -> nb_cargs ;
849
850
fprintf ( outfile , " %s " , def -> name );
851
/* function name */
852
fprintf ( outfile , "%s" ,
853
tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), args [ nb_oargs + nb_iargs - 1 ]));
854
855
856
857
858
859
860
861
862
863
864
/* flags */
fprintf ( outfile , ",$0x%" TCG_PRIlx ,
args [ nb_oargs + nb_iargs ]);
/* nb out args */
fprintf ( outfile , ",$%d" , nb_oargs );
for ( i = 0 ; i < nb_oargs ; i ++ ) {
fprintf ( outfile , "," );
fprintf ( outfile , "%s" ,
tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), args [ i ]));
}
for ( i = 0 ; i < ( nb_iargs - 1 ); i ++ ) {
865
fprintf ( outfile , "," );
866
867
868
869
870
871
if ( args [ nb_oargs + i ] == TCG_CALL_DUMMY_ARG ) {
fprintf ( outfile , "<dummy>" );
} else {
fprintf ( outfile , "%s" ,
tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), args [ nb_oargs + i ]));
}
872
}
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
} else if ( c == INDEX_op_movi_i32
# if TCG_TARGET_REG_BITS == 64
|| c == INDEX_op_movi_i64
# endif
) {
tcg_target_ulong val ;
TCGHelperInfo * th ;
nb_oargs = def -> nb_oargs ;
nb_iargs = def -> nb_iargs ;
nb_cargs = def -> nb_cargs ;
fprintf ( outfile , " %s %s,$" , def -> name ,
tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), args [ 0 ]));
val = args [ 1 ];
th = tcg_find_helper ( s , val );
if ( th ) {
889
fprintf ( outfile , "%s" , th -> name );
890
891
892
893
894
895
} else {
if ( c == INDEX_op_movi_i32 )
fprintf ( outfile , "0x%x" , ( uint32_t ) val );
else
fprintf ( outfile , "0x%" PRIx64 , ( uint64_t ) val );
}
896
} else {
897
fprintf ( outfile , " %s " , def -> name );
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
if ( c == INDEX_op_nopn ) {
/* variable number of arguments */
nb_cargs = * args ;
nb_oargs = 0 ;
nb_iargs = 0 ;
} else {
nb_oargs = def -> nb_oargs ;
nb_iargs = def -> nb_iargs ;
nb_cargs = def -> nb_cargs ;
}
k = 0 ;
for ( i = 0 ; i < nb_oargs ; i ++ ) {
if ( k != 0 )
fprintf ( outfile , "," );
fprintf ( outfile , "%s" ,
tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), args [ k ++ ]));
}
for ( i = 0 ; i < nb_iargs ; i ++ ) {
if ( k != 0 )
fprintf ( outfile , "," );
fprintf ( outfile , "%s" ,
tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), args [ k ++ ]));
}
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
if ( c == INDEX_op_brcond_i32
# if TCG_TARGET_REG_BITS == 32
|| c == INDEX_op_brcond2_i32
# elif TCG_TARGET_REG_BITS == 64
|| c == INDEX_op_brcond_i64
# endif
) {
if ( args [ k ] < ARRAY_SIZE ( cond_name ) && cond_name [ args [ k ]])
fprintf ( outfile , ",%s" , cond_name [ args [ k ++ ]]);
else
fprintf ( outfile , ",$0x%" TCG_PRIlx , args [ k ++ ]);
i = 1 ;
}
else
i = 0 ;
for (; i < nb_cargs ; i ++ ) {
938
939
940
941
942
if ( k != 0 )
fprintf ( outfile , "," );
arg = args [ k ++ ];
fprintf ( outfile , "$0x%" TCG_PRIlx , arg );
}
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
}
fprintf ( outfile , " \n " );
args += nb_iargs + nb_oargs + nb_cargs ;
}
}
/* we give more priority to constraints with less registers */
static int get_constraint_priority ( const TCGOpDef * def , int k )
{
const TCGArgConstraint * arg_ct ;
int i , n ;
arg_ct = & def -> args_ct [ k ];
if ( arg_ct -> ct & TCG_CT_ALIAS ) {
/* an alias is equivalent to a single register */
n = 1 ;
} else {
if ( ! ( arg_ct -> ct & TCG_CT_REG ))
return 0 ;
n = 0 ;
for ( i = 0 ; i < TCG_TARGET_NB_REGS ; i ++ ) {
if ( tcg_regset_test_reg ( arg_ct -> u . regs , i ))
n ++ ;
}
}
return TCG_TARGET_NB_REGS - n + 1 ;
}
/* sort from highest priority to lowest */
static void sort_constraints ( TCGOpDef * def , int start , int n )
{
int i , j , p1 , p2 , tmp ;
for ( i = 0 ; i < n ; i ++ )
def -> sorted_args [ start + i ] = start + i ;
if ( n <= 1 )
return ;
for ( i = 0 ; i < n - 1 ; i ++ ) {
for ( j = i + 1 ; j < n ; j ++ ) {
p1 = get_constraint_priority ( def , def -> sorted_args [ start + i ]);
p2 = get_constraint_priority ( def , def -> sorted_args [ start + j ]);
if ( p1 < p2 ) {
tmp = def -> sorted_args [ start + i ];
def -> sorted_args [ start + i ] = def -> sorted_args [ start + j ];
def -> sorted_args [ start + j ] = tmp ;
}
}
}
}
void tcg_add_target_add_op_defs ( const TCGTargetOpDef * tdefs )
{
int op ;
TCGOpDef * def ;
const char * ct_str ;
int i , nb_args ;
for (;;) {
if ( tdefs -> op < 0 )
break ;
op = tdefs -> op ;
assert ( op >= 0 && op < NB_OPS );
def = & tcg_op_defs [ op ];
nb_args = def -> nb_iargs + def -> nb_oargs ;
for ( i = 0 ; i < nb_args ; i ++ ) {
ct_str = tdefs -> args_ct_str [ i ];
tcg_regset_clear ( def -> args_ct [ i ]. u . regs );
def -> args_ct [ i ]. ct = 0 ;
if ( ct_str [ 0 ] >= '0' && ct_str [ 0 ] <= '9' ) {
int oarg ;
oarg = ct_str [ 0 ] - '0' ;
assert ( oarg < def -> nb_oargs );
assert ( def -> args_ct [ oarg ]. ct & TCG_CT_REG );
/* TCG_CT_ALIAS is for the output arguments . The input
1017
argument is tagged with TCG_CT_IALIAS . */
1018
def -> args_ct [ i ] = def -> args_ct [ oarg ];
1019
1020
def -> args_ct [ oarg ]. ct = TCG_CT_ALIAS ;
def -> args_ct [ oarg ]. alias_index = i ;
1021
def -> args_ct [ i ]. ct |= TCG_CT_IALIAS ;
1022
def -> args_ct [ i ]. alias_index = oarg ;
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
} else {
for (;;) {
if ( * ct_str == '\0' )
break ;
switch ( * ct_str ) {
case 'i' :
def -> args_ct [ i ]. ct |= TCG_CT_CONST ;
ct_str ++ ;
break ;
default :
if ( target_parse_constraint ( & def -> args_ct [ i ], & ct_str ) < 0 ) {
fprintf ( stderr , "Invalid constraint '%s' for arg %d of operation '%s' \n " ,
ct_str , i , def -> name );
exit ( 1 );
}
}
}
}
}
/* sort the constraints (XXX: this is just an heuristic) */
sort_constraints ( def , 0 , def -> nb_oargs );
sort_constraints ( def , def -> nb_oargs , def -> nb_iargs );
# if 0
{
int i ;
printf ( "%s: sorted=" , def -> name );
for ( i = 0 ; i < def -> nb_oargs + def -> nb_iargs ; i ++ )
printf ( " %d" , def -> sorted_args [ i ]);
printf ( " \n " );
}
# endif
tdefs ++ ;
}
}
# ifdef USE_LIVENESS_ANALYSIS
/* set a nop for an operation using 'nb_args' */
static inline void tcg_set_nop ( TCGContext * s , uint16_t * opc_ptr ,
TCGArg * args , int nb_args )
{
if ( nb_args == 0 ) {
* opc_ptr = INDEX_op_nop ;
} else {
* opc_ptr = INDEX_op_nopn ;
args [ 0 ] = nb_args ;
args [ nb_args - 1 ] = nb_args ;
}
}
1077
1078
1079
1080
1081
/* liveness analysis : end of function : globals are live , temps are
dead . */
/* XXX : at this stage , not used as there would be little gains because
most TBs end with a conditional jump . */
static inline void tcg_la_func_end ( TCGContext * s , uint8_t * dead_temps )
1082
1083
1084
1085
1086
{
memset ( dead_temps , 0 , s -> nb_globals );
memset ( dead_temps + s -> nb_globals , 1 , s -> nb_temps - s -> nb_globals );
}
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
/* liveness analysis : end of basic block : globals are live , temps are
dead , local temps are live . */
static inline void tcg_la_bb_end ( TCGContext * s , uint8_t * dead_temps )
{
int i ;
TCGTemp * ts ;
memset ( dead_temps , 0 , s -> nb_globals );
ts = & s -> temps [ s -> nb_globals ];
for ( i = s -> nb_globals ; i < s -> nb_temps ; i ++ ) {
if ( ts -> temp_local )
dead_temps [ i ] = 0 ;
else
dead_temps [ i ] = 1 ;
ts ++ ;
}
}
1105
1106
1107
/* Liveness analysis : update the opc_dead_iargs array to tell if a
given input arguments is dead . Instructions updating dead
temporaries are removed . */
1108
static void tcg_liveness_analysis ( TCGContext * s )
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
{
int i , op_index , op , nb_args , nb_iargs , nb_oargs , arg , nb_ops ;
TCGArg * args ;
const TCGOpDef * def ;
uint8_t * dead_temps ;
unsigned int dead_iargs ;
gen_opc_ptr ++ ; /* skip end */
nb_ops = gen_opc_ptr - gen_opc_buf ;
/* XXX: make it really dynamic */
s -> op_dead_iargs = tcg_malloc ( OPC_BUF_SIZE * sizeof ( uint16_t ));
dead_temps = tcg_malloc ( s -> nb_temps );
memset ( dead_temps , 1 , s -> nb_temps );
args = gen_opparam_ptr ;
op_index = nb_ops - 1 ;
while ( op_index >= 0 ) {
op = gen_opc_buf [ op_index ];
def = & tcg_op_defs [ op ];
switch ( op ) {
case INDEX_op_call :
1133
1134
{
int call_flags ;
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
nb_args = args [ - 1 ];
args -= nb_args ;
nb_iargs = args [ 0 ] & 0xffff ;
nb_oargs = args [ 0 ] >> 16 ;
args ++ ;
call_flags = args [ nb_oargs + nb_iargs ];
/* pure functions can be removed if their result is not
used */
if ( call_flags & TCG_CALL_PURE ) {
for ( i = 0 ; i < nb_oargs ; i ++ ) {
arg = args [ i ];
if ( ! dead_temps [ arg ])
goto do_not_remove_call ;
}
tcg_set_nop ( s , gen_opc_buf + op_index ,
args - 1 , nb_args );
} else {
do_not_remove_call :
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
/* output args are dead */
for ( i = 0 ; i < nb_oargs ; i ++ ) {
arg = args [ i ];
dead_temps [ arg ] = 1 ;
}
/* globals are live (they may be used by the call) */
memset ( dead_temps , 0 , s -> nb_globals );
/* input args are live */
dead_iargs = 0 ;
for ( i = 0 ; i < nb_iargs ; i ++ ) {
arg = args [ i + nb_oargs ];
1169
1170
1171
1172
1173
if ( arg != TCG_CALL_DUMMY_ARG ) {
if ( dead_temps [ arg ]) {
dead_iargs |= ( 1 << i );
}
dead_temps [ arg ] = 0 ;
1174
1175
1176
}
}
s -> op_dead_iargs [ op_index ] = dead_iargs ;
1177
}
1178
args -- ;
1179
1180
1181
1182
1183
1184
1185
}
break ;
case INDEX_op_set_label :
args -- ;
/* mark end of basic block */
tcg_la_bb_end ( s , dead_temps );
break ;
1186
1187
1188
case INDEX_op_debug_insn_start :
args -= def -> nb_args ;
break ;
1189
1190
1191
1192
case INDEX_op_nopn :
nb_args = args [ - 1 ];
args -= nb_args ;
break ;
1193
1194
1195
1196
1197
case INDEX_op_discard :
args -- ;
/* mark the temporary as dead */
dead_temps [ args [ 0 ]] = 1 ;
break ;
1198
1199
1200
1201
case INDEX_op_end :
break ;
/* XXX: optimize by hardcoding common cases (e.g. triadic ops) */
default :
1202
1203
1204
args -= def -> nb_args ;
nb_iargs = def -> nb_iargs ;
nb_oargs = def -> nb_oargs ;
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
/* Test if the operation can be removed because all
its outputs are dead . We assume that nb_oargs == 0
implies side effects */
if ( ! ( def -> flags & TCG_OPF_SIDE_EFFECTS ) && nb_oargs != 0 ) {
for ( i = 0 ; i < nb_oargs ; i ++ ) {
arg = args [ i ];
if ( ! dead_temps [ arg ])
goto do_not_remove ;
}
tcg_set_nop ( s , gen_opc_buf + op_index , args , def -> nb_args );
1216
# ifdef CONFIG_PROFILER
1217
s -> del_op_count ++ ;
1218
# endif
1219
1220
} else {
do_not_remove :
1221
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1228
1229
1230
1231
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1233
1234
1235
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1238
1239
1240
1241
/* output args are dead */
for ( i = 0 ; i < nb_oargs ; i ++ ) {
arg = args [ i ];
dead_temps [ arg ] = 1 ;
}
/* if end of basic block, update */
if ( def -> flags & TCG_OPF_BB_END ) {
tcg_la_bb_end ( s , dead_temps );
} else if ( def -> flags & TCG_OPF_CALL_CLOBBER ) {
/* globals are live */
memset ( dead_temps , 0 , s -> nb_globals );
}
/* input args are live */
dead_iargs = 0 ;
for ( i = 0 ; i < nb_iargs ; i ++ ) {
arg = args [ i + nb_oargs ];
if ( dead_temps [ arg ]) {
dead_iargs |= ( 1 << i );
1242
}
1243
dead_temps [ arg ] = 0 ;
1244
}
1245
s -> op_dead_iargs [ op_index ] = dead_iargs ;
1246
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}
break ;
}
op_index -- ;
}
if ( args != gen_opparam_buf )
tcg_abort ();
}
# else
/* dummy liveness analysis */
void tcg_liveness_analysis ( TCGContext * s )
{
int nb_ops ;
nb_ops = gen_opc_ptr - gen_opc_buf ;
s -> op_dead_iargs = tcg_malloc ( nb_ops * sizeof ( uint16_t ));
memset ( s -> op_dead_iargs , 0 , nb_ops * sizeof ( uint16_t ));
}
# endif
# ifndef NDEBUG
static void dump_regs ( TCGContext * s )
{
TCGTemp * ts ;
int i ;
char buf [ 64 ];
for ( i = 0 ; i < s -> nb_temps ; i ++ ) {
ts = & s -> temps [ i ];
1276
printf ( " %10s: " , tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), i ));
1277
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1300
switch ( ts -> val_type ) {
case TEMP_VAL_REG :
printf ( "%s" , tcg_target_reg_names [ ts -> reg ]);
break ;
case TEMP_VAL_MEM :
printf ( "%d(%s)" , ( int ) ts -> mem_offset , tcg_target_reg_names [ ts -> mem_reg ]);
break ;
case TEMP_VAL_CONST :
printf ( "$0x%" TCG_PRIlx , ts -> val );
break ;
case TEMP_VAL_DEAD :
printf ( "D" );
break ;
default :
printf ( "???" );
break ;
}
printf ( " \n " );
}
for ( i = 0 ; i < TCG_TARGET_NB_REGS ; i ++ ) {
if ( s -> reg_to_temp [ i ] >= 0 ) {
printf ( "%s: %s \n " ,
tcg_target_reg_names [ i ],
1301
tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), s -> reg_to_temp [ i ]));
1302
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1313
1314
1315
1316
1317
1318
1319
}
}
}
static void check_regs ( TCGContext * s )
{
int reg , k ;
TCGTemp * ts ;
char buf [ 64 ];
for ( reg = 0 ; reg < TCG_TARGET_NB_REGS ; reg ++ ) {
k = s -> reg_to_temp [ reg ];
if ( k >= 0 ) {
ts = & s -> temps [ k ];
if ( ts -> val_type != TEMP_VAL_REG ||
ts -> reg != reg ) {
printf ( "Inconsistency for register %s: \n " ,
tcg_target_reg_names [ reg ]);
1320
goto fail ;
1321
1322
1323
1324
1325
1326
1327
1328
1329
}
}
}
for ( k = 0 ; k < s -> nb_temps ; k ++ ) {
ts = & s -> temps [ k ];
if ( ts -> val_type == TEMP_VAL_REG &&
! ts -> fixed_reg &&
s -> reg_to_temp [ ts -> reg ] != k ) {
printf ( "Inconsistency for temp %s: \n " ,
1330
tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), k ));
1331
fail :
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
printf ( "reg state: \n " );
dump_regs ( s );
tcg_abort ();
}
}
}
# endif
static void temp_allocate_frame ( TCGContext * s , int temp )
{
TCGTemp * ts ;
ts = & s -> temps [ temp ];
s -> current_frame_offset = ( s -> current_frame_offset + sizeof ( tcg_target_long ) - 1 ) & ~ ( sizeof ( tcg_target_long ) - 1 );
if ( s -> current_frame_offset + sizeof ( tcg_target_long ) > s -> frame_end )
1346
tcg_abort ();
1347
1348
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1352
1353
1354
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1358
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1361
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1363
1364
1365
ts -> mem_offset = s -> current_frame_offset ;
ts -> mem_reg = s -> frame_reg ;
ts -> mem_allocated = 1 ;
s -> current_frame_offset += sizeof ( tcg_target_long );
}
/* free register 'reg' by spilling the corresponding temporary if necessary */
static void tcg_reg_free ( TCGContext * s , int reg )
{
TCGTemp * ts ;
int temp ;
temp = s -> reg_to_temp [ reg ];
if ( temp != - 1 ) {
ts = & s -> temps [ temp ];
assert ( ts -> val_type == TEMP_VAL_REG );
if ( ! ts -> mem_coherent ) {
if ( ! ts -> mem_allocated )
temp_allocate_frame ( s , temp );
1366
tcg_out_st ( s , ts -> type , reg , ts -> mem_reg , ts -> mem_offset );
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
}
ts -> val_type = TEMP_VAL_MEM ;
s -> reg_to_temp [ reg ] = - 1 ;
}
}
/* Allocate a register belonging to reg1 & ~reg2 */
static int tcg_reg_alloc ( TCGContext * s , TCGRegSet reg1 , TCGRegSet reg2 )
{
int i , reg ;
TCGRegSet reg_ct ;
tcg_regset_andnot ( reg_ct , reg1 , reg2 );
/* first try free registers */
1382
for ( i = 0 ; i < ARRAY_SIZE ( tcg_target_reg_alloc_order ); i ++ ) {
1383
1384
1385
1386
1387
1388
reg = tcg_target_reg_alloc_order [ i ];
if ( tcg_regset_test_reg ( reg_ct , reg ) && s -> reg_to_temp [ reg ] == - 1 )
return reg ;
}
/* XXX: do better spill choice */
1389
for ( i = 0 ; i < ARRAY_SIZE ( tcg_target_reg_alloc_order ); i ++ ) {
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
reg = tcg_target_reg_alloc_order [ i ];
if ( tcg_regset_test_reg ( reg_ct , reg )) {
tcg_reg_free ( s , reg );
return reg ;
}
}
tcg_abort ();
}
1400
1401
1402
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1404
1405
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1413
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1425
1426
1427
1428
1429
1430
1431
1432
/* save a temporary to memory . ' allocated_regs ' is used in case a
temporary registers needs to be allocated to store a constant . */
static void temp_save ( TCGContext * s , int temp , TCGRegSet allocated_regs )
{
TCGTemp * ts ;
int reg ;
ts = & s -> temps [ temp ] ;
if ( ! ts -> fixed_reg ) {
switch ( ts -> val_type ) {
case TEMP_VAL_REG :
tcg_reg_free ( s , ts -> reg ) ;
break ;
case TEMP_VAL_DEAD :
ts -> val_type = TEMP_VAL_MEM ;
break ;
case TEMP_VAL_CONST :
reg = tcg_reg_alloc ( s , tcg_target_available_regs [ ts -> type ],
allocated_regs ) ;
if ( ! ts -> mem_allocated )
temp_allocate_frame ( s , temp ) ;
tcg_out_movi ( s , ts -> type , reg , ts -> val ) ;
tcg_out_st ( s , ts -> type , reg , ts -> mem_reg , ts -> mem_offset ) ;
ts -> val_type = TEMP_VAL_MEM ;
break ;
case TEMP_VAL_MEM :
break ;
default :
tcg_abort ();
}
}
}
1433
/* save globals to their cannonical location and assume they can be
1434
1435
1436
modified be the following code . ' allocated_regs ' is used in case a
temporary registers needs to be allocated to store a constant . */
static void save_globals ( TCGContext * s , TCGRegSet allocated_regs )
1437
{
1438
int i ;
1439
1440
for ( i = 0 ; i < s -> nb_globals ; i ++ ) {
1441
temp_save ( s , i , allocated_regs ) ;
1442
}
1443
1444
1445
}
/* at the end of a basic block , we assume all temporaries are dead and
1446
1447
all globals are stored at their canonical location . */
static void tcg_reg_alloc_bb_end ( TCGContext * s , TCGRegSet allocated_regs )
1448
1449
1450
1451
{
TCGTemp * ts ;
int i ;
1452
1453
for ( i = s -> nb_globals ; i < s -> nb_temps ; i ++ ) {
ts = & s -> temps [ i ] ;
1454
1455
1456
1457
1458
1459
1460
if ( ts -> temp_local ) {
temp_save ( s , i , allocated_regs ) ;
} else {
if ( ts -> val_type == TEMP_VAL_REG ) {
s -> reg_to_temp [ ts -> reg ] = - 1 ;
}
ts -> val_type = TEMP_VAL_DEAD ;
1461
1462
}
}
1463
1464
save_globals ( s , allocated_regs ) ;
1465
1466
1467
1468
}
# define IS_DEAD_IARG ( n ) (( dead_iargs >> ( n )) & 1 )
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
static void tcg_reg_alloc_movi ( TCGContext * s , const TCGArg * args )
{
TCGTemp * ots ;
tcg_target_ulong val ;
ots = & s -> temps [ args [ 0 ]] ;
val = args [ 1 ] ;
if ( ots -> fixed_reg ) {
/* for fixed registers , we do not do any constant
propagation */
tcg_out_movi ( s , ots -> type , ots -> reg , val ) ;
} else {
ths
authored
17 years ago
1482
/* The movi is not explicitly generated here */
1483
1484
1485
1486
1487
1488
1489
if ( ots -> val_type == TEMP_VAL_REG )
s -> reg_to_temp [ ots -> reg ] = - 1 ;
ots -> val_type = TEMP_VAL_CONST ;
ots -> val = val ;
}
}
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
static void tcg_reg_alloc_mov ( TCGContext * s , const TCGOpDef * def ,
const TCGArg * args ,
unsigned int dead_iargs )
{
TCGTemp * ts , * ots ;
int reg ;
const TCGArgConstraint * arg_ct ;
ots = & s -> temps [ args [ 0 ]] ;
ts = & s -> temps [ args [ 1 ]] ;
arg_ct = & def -> args_ct [ 0 ] ;
1502
/* XXX: always mark arg dead if IS_DEAD_IARG(0) */
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
if ( ts -> val_type == TEMP_VAL_REG ) {
if ( IS_DEAD_IARG ( 0 ) && ! ts -> fixed_reg && ! ots -> fixed_reg ) {
/* the mov can be suppressed */
if ( ots -> val_type == TEMP_VAL_REG )
s -> reg_to_temp [ ots -> reg ] = - 1 ;
reg = ts -> reg ;
s -> reg_to_temp [ reg ] = - 1 ;
ts -> val_type = TEMP_VAL_DEAD ;
} else {
if ( ots -> val_type == TEMP_VAL_REG ) {
reg = ots -> reg ;
} else {
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , s -> reserved_regs ) ;
}
if ( ts -> reg != reg ) {
tcg_out_mov ( s , reg , ts -> reg ) ;
}
}
} else if ( ts -> val_type == TEMP_VAL_MEM ) {
if ( ots -> val_type == TEMP_VAL_REG ) {
reg = ots -> reg ;
} else {
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , s -> reserved_regs ) ;
}
1527
tcg_out_ld ( s , ts -> type , reg , ts -> mem_reg , ts -> mem_offset ) ;
1528
} else if ( ts -> val_type == TEMP_VAL_CONST ) {
1529
if ( ots -> fixed_reg ) {
1530
reg = ots -> reg ;
1531
tcg_out_movi ( s , ots -> type , reg , ts -> val ) ;
1532
} else {
1533
1534
1535
1536
1537
1538
/* propagate constant */
if ( ots -> val_type == TEMP_VAL_REG )
s -> reg_to_temp [ ots -> reg ] = - 1 ;
ots -> val_type = TEMP_VAL_CONST ;
ots -> val = ts -> val ;
return ;
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
}
} else {
tcg_abort () ;
}
s -> reg_to_temp [ reg ] = args [ 0 ] ;
ots -> reg = reg ;
ots -> val_type = TEMP_VAL_REG ;
ots -> mem_coherent = 0 ;
}
static void tcg_reg_alloc_op ( TCGContext * s ,
const TCGOpDef * def , int opc ,
const TCGArg * args ,
unsigned int dead_iargs )
{
TCGRegSet allocated_regs ;
int i , k , nb_iargs , nb_oargs , reg ;
TCGArg arg ;
const TCGArgConstraint * arg_ct ;
TCGTemp * ts ;
TCGArg new_args [ TCG_MAX_OP_ARGS ] ;
int const_args [ TCG_MAX_OP_ARGS ] ;
nb_oargs = def -> nb_oargs ;
nb_iargs = def -> nb_iargs ;
/* copy constants */
memcpy ( new_args + nb_oargs + nb_iargs ,
args + nb_oargs + nb_iargs ,
sizeof ( TCGArg ) * def -> nb_cargs ) ;
/* satisfy input constraints */
tcg_regset_set ( allocated_regs , s -> reserved_regs ) ;
for ( k = 0 ; k < nb_iargs ; k ++ ) {
i = def -> sorted_args [ nb_oargs + k ] ;
arg = args [ i ] ;
arg_ct = & def -> args_ct [ i ] ;
ts = & s -> temps [ arg ] ;
if ( ts -> val_type == TEMP_VAL_MEM ) {
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , allocated_regs ) ;
1579
tcg_out_ld ( s , ts -> type , reg , ts -> mem_reg , ts -> mem_offset ) ;
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
ts -> val_type = TEMP_VAL_REG ;
ts -> reg = reg ;
ts -> mem_coherent = 1 ;
s -> reg_to_temp [ reg ] = arg ;
} else if ( ts -> val_type == TEMP_VAL_CONST ) {
if ( tcg_target_const_match ( ts -> val , arg_ct )) {
/* constant is OK for instruction */
const_args [ i ] = 1 ;
new_args [ i ] = ts -> val ;
goto iarg_end ;
} else {
1591
/* need to move to a register */
1592
1593
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , allocated_regs ) ;
tcg_out_movi ( s , ts -> type , reg , ts -> val ) ;
1594
1595
1596
1597
ts -> val_type = TEMP_VAL_REG ;
ts -> reg = reg ;
ts -> mem_coherent = 0 ;
s -> reg_to_temp [ reg ] = arg ;
1598
1599
1600
}
}
assert ( ts -> val_type == TEMP_VAL_REG ) ;
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
if ( arg_ct -> ct & TCG_CT_IALIAS ) {
if ( ts -> fixed_reg ) {
/* if fixed register , we must allocate a new register
if the alias is not the same register */
if ( arg != args [ arg_ct -> alias_index ])
goto allocate_in_reg ;
} else {
/* if the input is aliased to an output and if it is
not dead after the instruction , we must allocate
a new register and move it */
if ( ! IS_DEAD_IARG ( i - nb_oargs ))
goto allocate_in_reg ;
}
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
}
reg = ts -> reg ;
if ( tcg_regset_test_reg ( arg_ct -> u . regs , reg )) {
/* nothing to do : the constraint is satisfied */
} else {
allocate_in_reg :
/* allocate a new register matching the constraint
and move the temporary register into it */
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , allocated_regs );
tcg_out_mov ( s , reg , ts -> reg );
}
new_args [ i ] = reg ;
const_args [ i ] = 0 ;
tcg_regset_set_reg ( allocated_regs , reg );
iarg_end : ;
}
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
if ( def -> flags & TCG_OPF_BB_END ) {
tcg_reg_alloc_bb_end ( s , allocated_regs );
} else {
/* mark dead temporaries and free the associated registers */
for ( i = 0 ; i < nb_iargs ; i ++ ) {
arg = args [ nb_oargs + i ];
if ( IS_DEAD_IARG ( i )) {
ts = & s -> temps [ arg ];
if ( ! ts -> fixed_reg ) {
if ( ts -> val_type == TEMP_VAL_REG )
s -> reg_to_temp [ ts -> reg ] = - 1 ;
ts -> val_type = TEMP_VAL_DEAD ;
}
1644
1645
}
}
1646
1647
1648
1649
1650
1651
1652
if ( def -> flags & TCG_OPF_CALL_CLOBBER ) {
/* XXX: permit generic clobber register list ? */
for ( reg = 0 ; reg < TCG_TARGET_NB_REGS ; reg ++ ) {
if ( tcg_regset_test_reg ( tcg_target_call_clobber_regs , reg )) {
tcg_reg_free ( s , reg );
}
1653
}
1654
1655
1656
1657
1658
1659
/* XXX : for load / store we could do that only for the slow path
( i . e . when a memory callback is called ) */
/* store globals and free associated registers ( we assume the insn
can modify any global . */
save_globals ( s , allocated_regs );
1660
}
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
/* satisfy the output constraints */
tcg_regset_set ( allocated_regs , s -> reserved_regs );
for ( k = 0 ; k < nb_oargs ; k ++ ) {
i = def -> sorted_args [ k ];
arg = args [ i ];
arg_ct = & def -> args_ct [ i ];
ts = & s -> temps [ arg ];
if ( arg_ct -> ct & TCG_CT_ALIAS ) {
reg = new_args [ arg_ct -> alias_index ];
} else {
/* if fixed register, we try to use it */
reg = ts -> reg ;
if ( ts -> fixed_reg &&
tcg_regset_test_reg ( arg_ct -> u . regs , reg )) {
goto oarg_end ;
}
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , allocated_regs );
1679
}
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
tcg_regset_set_reg ( allocated_regs , reg );
/* if a fixed register is used, then a move will be done afterwards */
if ( ! ts -> fixed_reg ) {
if ( ts -> val_type == TEMP_VAL_REG )
s -> reg_to_temp [ ts -> reg ] = - 1 ;
ts -> val_type = TEMP_VAL_REG ;
ts -> reg = reg ;
/* temp value is modified , so the value kept in memory is
potentially not the same */
ts -> mem_coherent = 0 ;
s -> reg_to_temp [ reg ] = arg ;
}
oarg_end :
new_args [ i ] = reg ;
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
}
}
/* emit instruction */
tcg_out_op ( s , opc , new_args , const_args );
/* move the outputs in the correct register if needed */
for ( i = 0 ; i < nb_oargs ; i ++ ) {
ts = & s -> temps [ args [ i ]];
reg = new_args [ i ];
if ( ts -> fixed_reg && ts -> reg != reg ) {
tcg_out_mov ( s , ts -> reg , reg );
}
}
}
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1715
# ifdef TCG_TARGET_STACK_GROWSUP
# define STACK_DIR ( x ) ( - ( x ))
# else
# define STACK_DIR ( x ) ( x )
# endif
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1722
static int tcg_reg_alloc_call ( TCGContext * s , const TCGOpDef * def ,
int opc , const TCGArg * args ,
unsigned int dead_iargs )
{
int nb_iargs , nb_oargs , flags , nb_regs , i , reg , nb_params ;
TCGArg arg , func_arg ;
TCGTemp * ts ;
1723
tcg_target_long stack_offset , call_stack_size , func_addr ;
1724
int const_func_arg , allocate_args ;
1725
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1737
1738
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1743
1744
TCGRegSet allocated_regs ;
const TCGArgConstraint * arg_ct ;
arg = * args ++ ;
nb_oargs = arg >> 16 ;
nb_iargs = arg & 0xffff ;
nb_params = nb_iargs - 1 ;
flags = args [ nb_oargs + nb_iargs ];
nb_regs = tcg_target_get_call_iarg_regs_count ( flags );
if ( nb_regs > nb_params )
nb_regs = nb_params ;
/* assign stack slots first */
/* XXX: preallocate call stack */
call_stack_size = ( nb_params - nb_regs ) * sizeof ( tcg_target_long );
call_stack_size = ( call_stack_size + TCG_TARGET_STACK_ALIGN - 1 ) &
~ ( TCG_TARGET_STACK_ALIGN - 1 );
1745
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allocate_args = ( call_stack_size > TCG_STATIC_CALL_ARGS_SIZE );
if ( allocate_args ) {
tcg_out_addi ( s , TCG_REG_CALL_STACK , - STACK_DIR ( call_stack_size ));
}
1749
1750
stack_offset = TCG_TARGET_CALL_STACK_OFFSET ;
1751
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for ( i = nb_regs ; i < nb_params ; i ++ ) {
arg = args [ nb_oargs + i ];
1753
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1760
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1770
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1773
1774
# ifdef TCG_TARGET_STACK_GROWSUP
stack_offset -= sizeof ( tcg_target_long );
# endif
if ( arg != TCG_CALL_DUMMY_ARG ) {
ts = & s -> temps [ arg ];
if ( ts -> val_type == TEMP_VAL_REG ) {
tcg_out_st ( s , ts -> type , ts -> reg , TCG_REG_CALL_STACK , stack_offset );
} else if ( ts -> val_type == TEMP_VAL_MEM ) {
reg = tcg_reg_alloc ( s , tcg_target_available_regs [ ts -> type ],
s -> reserved_regs );
/* XXX: not correct if reading values from the stack */
tcg_out_ld ( s , ts -> type , reg , ts -> mem_reg , ts -> mem_offset );
tcg_out_st ( s , ts -> type , reg , TCG_REG_CALL_STACK , stack_offset );
} else if ( ts -> val_type == TEMP_VAL_CONST ) {
reg = tcg_reg_alloc ( s , tcg_target_available_regs [ ts -> type ],
s -> reserved_regs );
/* XXX: sign extend may be needed on some targets */
tcg_out_movi ( s , ts -> type , reg , ts -> val );
tcg_out_st ( s , ts -> type , reg , TCG_REG_CALL_STACK , stack_offset );
} else {
tcg_abort ();
}
1775
}
1776
1777
1778
# ifndef TCG_TARGET_STACK_GROWSUP
stack_offset += sizeof ( tcg_target_long );
# endif
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}
/* assign input registers */
tcg_regset_set ( allocated_regs , s -> reserved_regs );
for ( i = 0 ; i < nb_regs ; i ++ ) {
arg = args [ nb_oargs + i ];
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if ( arg != TCG_CALL_DUMMY_ARG ) {
ts = & s -> temps [ arg ];
reg = tcg_target_call_iarg_regs [ i ];
tcg_reg_free ( s , reg );
if ( ts -> val_type == TEMP_VAL_REG ) {
if ( ts -> reg != reg ) {
tcg_out_mov ( s , reg , ts -> reg );
}
} else if ( ts -> val_type == TEMP_VAL_MEM ) {
tcg_out_ld ( s , ts -> type , reg , ts -> mem_reg , ts -> mem_offset );
} else if ( ts -> val_type == TEMP_VAL_CONST ) {
/* XXX: sign extend ? */
tcg_out_movi ( s , ts -> type , reg , ts -> val );
} else {
tcg_abort ();
1800
}
1801
tcg_regset_set_reg ( allocated_regs , reg );
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}
}
/* assign function address */
func_arg = args [ nb_oargs + nb_iargs - 1 ];
arg_ct = & def -> args_ct [ 0 ];
ts = & s -> temps [ func_arg ];
1809
func_addr = ts -> val ;
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const_func_arg = 0 ;
if ( ts -> val_type == TEMP_VAL_MEM ) {
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , allocated_regs );
1813
tcg_out_ld ( s , ts -> type , reg , ts -> mem_reg , ts -> mem_offset );
1814
func_arg = reg ;
1815
tcg_regset_set_reg ( allocated_regs , reg );
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} else if ( ts -> val_type == TEMP_VAL_REG ) {
reg = ts -> reg ;
if ( ! tcg_regset_test_reg ( arg_ct -> u . regs , reg )) {
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , allocated_regs );
tcg_out_mov ( s , reg , ts -> reg );
}
func_arg = reg ;
1823
tcg_regset_set_reg ( allocated_regs , reg );
1824
} else if ( ts -> val_type == TEMP_VAL_CONST ) {
1825
if ( tcg_target_const_match ( func_addr , arg_ct )) {
1826
const_func_arg = 1 ;
1827
func_arg = func_addr ;
1828
1829
} else {
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , allocated_regs );
1830
tcg_out_movi ( s , ts -> type , reg , func_addr );
1831
func_arg = reg ;
1832
tcg_regset_set_reg ( allocated_regs , reg );
1833
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1836
}
} else {
tcg_abort ();
}
1837
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/* mark dead temporaries and free the associated registers */
1840
for ( i = 0 ; i < nb_iargs ; i ++ ) {
1841
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arg = args [ nb_oargs + i ];
if ( IS_DEAD_IARG ( i )) {
ts = & s -> temps [ arg ];
1844
if ( ! ts -> fixed_reg ) {
1845
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if ( ts -> val_type == TEMP_VAL_REG )
s -> reg_to_temp [ ts -> reg ] = - 1 ;
ts -> val_type = TEMP_VAL_DEAD ;
}
}
}
/* clobber call registers */
for ( reg = 0 ; reg < TCG_TARGET_NB_REGS ; reg ++ ) {
if ( tcg_regset_test_reg ( tcg_target_call_clobber_regs , reg )) {
tcg_reg_free ( s , reg );
}
}
/* store globals and free associated registers ( we assume the call
can modify any global . */
1861
save_globals ( s , allocated_regs );
1862
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1864
tcg_out_op ( s , opc , & func_arg , & const_func_arg );
1865
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if ( allocate_args ) {
tcg_out_addi ( s , TCG_REG_CALL_STACK , STACK_DIR ( call_stack_size ));
}
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1873
/* assign output registers and emit moves if needed */
for ( i = 0 ; i < nb_oargs ; i ++ ) {
arg = args [ i ];
ts = & s -> temps [ arg ];
reg = tcg_target_call_oarg_regs [ i ];
1874
assert ( s -> reg_to_temp [ reg ] == - 1 );
1875
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if ( ts -> fixed_reg ) {
if ( ts -> reg != reg ) {
tcg_out_mov ( s , ts -> reg , reg );
}
} else {
if ( ts -> val_type == TEMP_VAL_REG )
s -> reg_to_temp [ ts -> reg ] = - 1 ;
ts -> val_type = TEMP_VAL_REG ;
ts -> reg = reg ;
ts -> mem_coherent = 0 ;
s -> reg_to_temp [ reg ] = arg ;
}
}
return nb_iargs + nb_oargs + def -> nb_cargs + 1 ;
}
# ifdef CONFIG_PROFILER
1894
static int64_t tcg_table_op_count [ NB_OPS ];
1895
1896
1897
1898
1899
void dump_op_count ( void )
{
int i ;
FILE * f ;
1900
f = fopen ( "/tmp/op.log" , "w" );
1901
for ( i = INDEX_op_end ; i < NB_OPS ; i ++ ) {
1902
fprintf ( f , "%s %" PRId64 " \n " , tcg_op_defs [ i ]. name , tcg_table_op_count [ i ]);
1903
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1906
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1908
1909
}
fclose ( f );
}
# endif
static inline int tcg_gen_code_common ( TCGContext * s , uint8_t * gen_code_buf ,
1910
long search_pc )
1911
{
1912
int opc , op_index ;
1913
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1924
const TCGOpDef * def ;
unsigned int dead_iargs ;
const TCGArg * args ;
# ifdef DEBUG_DISAS
if ( unlikely ( loglevel & CPU_LOG_TB_OP )) {
fprintf ( logfile , "OP: \n " );
tcg_dump_ops ( s , logfile );
fprintf ( logfile , " \n " );
}
# endif
1925
1926
1927
# ifdef CONFIG_PROFILER
s -> la_time -= profile_getclock ();
# endif
1928
tcg_liveness_analysis ( s );
1929
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1931
# ifdef CONFIG_PROFILER
s -> la_time += profile_getclock ();
# endif
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# ifdef DEBUG_DISAS
if ( unlikely ( loglevel & CPU_LOG_TB_OP_OPT )) {
fprintf ( logfile , "OP after la: \n " );
tcg_dump_ops ( s , logfile );
fprintf ( logfile , " \n " );
}
# endif
tcg_reg_alloc_start ( s );
s -> code_buf = gen_code_buf ;
s -> code_ptr = gen_code_buf ;
args = gen_opparam_buf ;
op_index = 0 ;
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1951
for (;;) {
opc = gen_opc_buf [ op_index ];
# ifdef CONFIG_PROFILER
1952
tcg_table_op_count [ opc ] ++ ;
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# endif
def = & tcg_op_defs [ opc ];
# if 0
printf ( "%s: %d %d %d \n " , def -> name ,
def -> nb_oargs , def -> nb_iargs , def -> nb_cargs );
// dump_regs ( s );
# endif
switch ( opc ) {
case INDEX_op_mov_i32 :
# if TCG_TARGET_REG_BITS == 64
case INDEX_op_mov_i64 :
# endif
dead_iargs = s -> op_dead_iargs [ op_index ];
tcg_reg_alloc_mov ( s , def , args , dead_iargs );
break ;
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1969
1970
1971
1972
1973
case INDEX_op_movi_i32 :
# if TCG_TARGET_REG_BITS == 64
case INDEX_op_movi_i64 :
# endif
tcg_reg_alloc_movi ( s , args );
break ;
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1975
1976
case INDEX_op_debug_insn_start :
/* debug instruction */
break ;
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1980
1981
1982
1983
1984
case INDEX_op_nop :
case INDEX_op_nop1 :
case INDEX_op_nop2 :
case INDEX_op_nop3 :
break ;
case INDEX_op_nopn :
args += args [ 0 ];
goto next ;
1985
1986
1987
1988
1989
case INDEX_op_discard :
{
TCGTemp * ts ;
ts = & s -> temps [ args [ 0 ]];
/* mark the temporary as dead */
1990
if ( ! ts -> fixed_reg ) {
1991
1992
1993
1994
1995
1996
if ( ts -> val_type == TEMP_VAL_REG )
s -> reg_to_temp [ ts -> reg ] = - 1 ;
ts -> val_type = TEMP_VAL_DEAD ;
}
}
break ;
1997
case INDEX_op_set_label :
1998
tcg_reg_alloc_bb_end ( s , s -> reserved_regs );
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
tcg_out_label ( s , args [ 0 ], ( long ) s -> code_ptr );
break ;
case INDEX_op_call :
dead_iargs = s -> op_dead_iargs [ op_index ];
args += tcg_reg_alloc_call ( s , def , opc , args , dead_iargs );
goto next ;
case INDEX_op_end :
goto the_end ;
default :
/* Note : in order to speed up the code , it would be much
faster to have specialized register allocator functions for
some common argument patterns */
dead_iargs = s -> op_dead_iargs [ op_index ];
tcg_reg_alloc_op ( s , def , opc , args , dead_iargs );
break ;
}
args += def -> nb_args ;
ths
authored
17 years ago
2016
next :
2017
if ( search_pc >= 0 && search_pc < s -> code_ptr - gen_code_buf ) {
2018
return op_index ;
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
}
op_index ++ ;
# ifndef NDEBUG
check_regs ( s );
# endif
}
the_end :
return - 1 ;
}
2029
int tcg_gen_code ( TCGContext * s , uint8_t * gen_code_buf )
2030
2031
2032
2033
2034
{
# ifdef CONFIG_PROFILER
{
int n ;
n = ( gen_opc_ptr - gen_opc_buf );
2035
2036
2037
2038
2039
2040
2041
s -> op_count += n ;
if ( n > s -> op_count_max )
s -> op_count_max = n ;
s -> temp_count += s -> nb_temps ;
if ( s -> nb_temps > s -> temp_count_max )
s -> temp_count_max = s -> nb_temps ;
2042
2043
2044
}
# endif
2045
tcg_gen_code_common ( s , gen_code_buf , - 1 );
2046
2047
2048
2049
2050
2051
2052
/* flush instruction cache */
flush_icache_range (( unsigned long ) gen_code_buf ,
( unsigned long ) s -> code_ptr );
return s -> code_ptr - gen_code_buf ;
}
2053
/* Return the index of the micro operation such as the pc after is <
2054
2055
2056
offset bytes from the start of the TB . The contents of gen_code_buf must
not be changed , though writing the same values is ok .
Return - 1 if not found . */
2057
int tcg_gen_code_search_pc ( TCGContext * s , uint8_t * gen_code_buf , long offset )
2058
{
2059
return tcg_gen_code_common ( s , gen_code_buf , offset );
2060
}
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
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2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
# ifdef CONFIG_PROFILER
void tcg_dump_info ( FILE * f ,
int ( * cpu_fprintf )( FILE * f , const char * fmt , ...))
{
TCGContext * s = & tcg_ctx ;
int64_t tot ;
tot = s -> interm_time + s -> code_time ;
cpu_fprintf ( f , "JIT cycles %" PRId64 " (%0.3f s at 2.4 GHz) \n " ,
tot , tot / 2.4e9 );
cpu_fprintf ( f , "translated TBs %" PRId64 " (aborted=%" PRId64 " %0.1f%%) \n " ,
s -> tb_count ,
s -> tb_count1 - s -> tb_count ,
s -> tb_count1 ? ( double )( s -> tb_count1 - s -> tb_count ) / s -> tb_count1 * 100 . 0 : 0 );
cpu_fprintf ( f , "avg ops/TB %0.1f max=%d \n " ,
s -> tb_count ? ( double ) s -> op_count / s -> tb_count : 0 , s -> op_count_max );
cpu_fprintf ( f , "old ops/total ops %0.1f%% \n " ,
s -> op_count ? ( double ) s -> old_op_count / s -> op_count * 100 . 0 : 0 );
cpu_fprintf ( f , "deleted ops/TB %0.2f \n " ,
s -> tb_count ?
( double ) s -> del_op_count / s -> tb_count : 0 );
cpu_fprintf ( f , "avg temps/TB %0.2f max=%d \n " ,
s -> tb_count ?
( double ) s -> temp_count / s -> tb_count : 0 ,
s -> temp_count_max );
cpu_fprintf ( f , "cycles/op %0.1f \n " ,
s -> op_count ? ( double ) tot / s -> op_count : 0 );
cpu_fprintf ( f , "cycles/in byte %0.1f \n " ,
s -> code_in_len ? ( double ) tot / s -> code_in_len : 0 );
cpu_fprintf ( f , "cycles/out byte %0.1f \n " ,
s -> code_out_len ? ( double ) tot / s -> code_out_len : 0 );
if ( tot == 0 )
tot = 1 ;
cpu_fprintf ( f , " gen_interm time %0.1f%% \n " ,
( double ) s -> interm_time / tot * 100 . 0 );
cpu_fprintf ( f , " gen_code time %0.1f%% \n " ,
( double ) s -> code_time / tot * 100 . 0 );
cpu_fprintf ( f , "liveness/code time %0.1f%% \n " ,
( double ) s -> la_time / ( s -> code_time ? s -> code_time : 1 ) * 100 . 0 );
cpu_fprintf ( f , "cpu_restore count %" PRId64 " \n " ,
s -> restore_count );
cpu_fprintf ( f , " avg cycles %0.1f \n " ,
s -> restore_count ? ( double ) s -> restore_time / s -> restore_count : 0 );
{
extern void dump_op_count ( void );
dump_op_count ();
}
}
# else
2112
void tcg_dump_info ( FILE * f ,
2113
2114
int ( * cpu_fprintf )( FILE * f , const char * fmt , ...))
{
2115
cpu_fprintf ( f , "[TCG profiler not compiled] \n " );
2116
2117
}
# endif