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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 use liveness analysis (better code) */
# define USE_LIVENESS_ANALYSIS
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# include "config.h"
# ifndef DEBUG_TCG
/* define it to suppress various consistency checks (faster) */
# define NDEBUG
# endif
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# 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 "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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static TCGOpDef tcg_op_defs [] = {
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# 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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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
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# ifdef TCG_TARGET_CALL_ALIGN_ARGS
/* some targets want aligned 64 bit args */
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if ( real_args & 1 ) {
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* gen_opparam_ptr ++ = TCG_CALL_DUMMY_ARG ;
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real_args ++ ;
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}
# endif
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# ifdef TCG_TARGET_WORDS_BIGENDIAN
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* gen_opparam_ptr ++ = args [ i ] + 1 ;
* gen_opparam_ptr ++ = args [ i ];
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# else
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* gen_opparam_ptr ++ = args [ i ];
* gen_opparam_ptr ++ = args [ i ] + 1 ;
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# endif
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real_args += 2 ;
} else
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# endif
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{
* gen_opparam_ptr ++ = args [ i ];
real_args ++ ;
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}
}
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* 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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}
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# if TCG_TARGET_REG_BITS == 32
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void tcg_gen_shifti_i64 ( TCGv_i64 ret , TCGv_i64 arg1 ,
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int c , int right , int arith )
{
624
if ( c == 0 ) {
625
tcg_gen_mov_i32 ( TCGV_LOW ( ret ), TCGV_LOW ( arg1 ));
626
627
tcg_gen_mov_i32 ( TCGV_HIGH ( ret ), TCGV_HIGH ( arg1 ));
} else if ( c >= 32 ) {
628
629
630
c -= 32 ;
if ( right ) {
if ( arith ) {
631
tcg_gen_sari_i32 ( TCGV_LOW ( ret ), TCGV_HIGH ( arg1 ), c );
632
tcg_gen_sari_i32 ( TCGV_HIGH ( ret ), TCGV_HIGH ( arg1 ), 31 );
633
} else {
634
tcg_gen_shri_i32 ( TCGV_LOW ( ret ), TCGV_HIGH ( arg1 ), c );
635
tcg_gen_movi_i32 ( TCGV_HIGH ( ret ), 0 );
636
637
}
} else {
638
639
tcg_gen_shli_i32 ( TCGV_HIGH ( ret ), TCGV_LOW ( arg1 ), c );
tcg_gen_movi_i32 ( TCGV_LOW ( ret ), 0 );
640
641
}
} else {
642
TCGv_i32 t0 , t1 ;
643
644
645
t0 = tcg_temp_new_i32 ();
t1 = tcg_temp_new_i32 ();
646
if ( right ) {
647
tcg_gen_shli_i32 ( t0 , TCGV_HIGH ( arg1 ), 32 - c );
648
if ( arith )
649
tcg_gen_sari_i32 ( t1 , TCGV_HIGH ( arg1 ), c );
650
else
651
tcg_gen_shri_i32 ( t1 , TCGV_HIGH ( arg1 ), c );
652
653
tcg_gen_shri_i32 ( TCGV_LOW ( ret ), TCGV_LOW ( arg1 ), c );
tcg_gen_or_i32 ( TCGV_LOW ( ret ), TCGV_LOW ( ret ), t0 );
654
tcg_gen_mov_i32 ( TCGV_HIGH ( ret ), t1 );
655
} else {
656
tcg_gen_shri_i32 ( t0 , TCGV_LOW ( arg1 ), 32 - c );
657
/* Note: ret can be the same as arg1, so we use t1 */
658
tcg_gen_shli_i32 ( t1 , TCGV_LOW ( arg1 ), c );
659
660
tcg_gen_shli_i32 ( TCGV_HIGH ( ret ), TCGV_HIGH ( arg1 ), c );
tcg_gen_or_i32 ( TCGV_HIGH ( ret ), TCGV_HIGH ( ret ), t0 );
661
tcg_gen_mov_i32 ( TCGV_LOW ( ret ), t1 );
662
}
663
664
tcg_temp_free_i32 ( t0 );
tcg_temp_free_i32 ( t1 );
665
666
}
}
667
# endif
668
669
static void tcg_reg_alloc_start ( TCGContext * s )
670
671
672
673
674
675
676
677
678
679
680
{
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 ;
}
}
681
682
683
684
685
686
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 ;
}
687
688
689
690
691
for ( i = 0 ; i < TCG_TARGET_NB_REGS ; i ++ ) {
s -> reg_to_temp [ i ] = - 1 ;
}
}
692
693
static char * tcg_get_arg_str_idx ( TCGContext * s , char * buf , int buf_size ,
int idx )
694
695
{
TCGTemp * ts ;
696
697
698
699
ts = & s -> temps [ idx ];
if ( idx < s -> nb_globals ) {
pstrcpy ( buf , buf_size , ts -> name );
700
} else {
701
702
703
704
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 );
705
706
707
708
}
return buf ;
}
709
710
711
712
713
714
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 )
715
{
716
return tcg_get_arg_str_idx ( s , buf , buf_size , GET_TCGV_I64 ( arg ));
717
718
}
719
static int helper_cmp ( const void * p1 , const void * p2 )
720
{
721
722
723
724
725
726
727
728
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 ;
729
730
}
731
732
/* find helper definition (Note: A hash table would be better) */
static TCGHelperInfo * tcg_find_helper ( TCGContext * s , tcg_target_ulong val )
733
{
734
int m , m_min , m_max ;
735
TCGHelperInfo * th ;
736
tcg_target_ulong v ;
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
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 ;
757
758
}
}
759
return NULL ;
760
761
}
762
763
764
765
766
767
768
769
770
771
772
773
774
775
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"
};
776
777
778
779
780
void tcg_dump_ops ( TCGContext * s , FILE * outfile )
{
const uint16_t * opc_ptr ;
const TCGArg * args ;
TCGArg arg ;
781
int c , i , k , nb_oargs , nb_iargs , nb_cargs , first_insn ;
782
783
784
const TCGOpDef * def ;
char buf [ 128 ];
785
first_insn = 1 ;
786
787
788
789
790
opc_ptr = gen_opc_buf ;
args = gen_opparam_buf ;
while ( opc_ptr < gen_opc_ptr ) {
c = * opc_ptr ++ ;
def = & tcg_op_defs [ c ];
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
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 ) {
806
TCGArg arg ;
807
808
809
810
811
812
813
/* variable number of arguments */
arg = * args ++ ;
nb_oargs = arg >> 16 ;
nb_iargs = arg & 0xffff ;
nb_cargs = def -> nb_cargs ;
814
815
fprintf ( outfile , " %s " , def -> name );
816
/* function name */
817
fprintf ( outfile , "%s" ,
818
tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), args [ nb_oargs + nb_iargs - 1 ]));
819
820
821
822
823
824
825
826
827
828
829
/* 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 ++ ) {
830
fprintf ( outfile , "," );
831
832
833
834
835
836
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 ]));
}
837
}
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
} 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 ) {
854
fprintf ( outfile , "%s" , th -> name );
855
856
857
858
859
860
} else {
if ( c == INDEX_op_movi_i32 )
fprintf ( outfile , "0x%x" , ( uint32_t ) val );
else
fprintf ( outfile , "0x%" PRIx64 , ( uint64_t ) val );
}
861
} else {
862
fprintf ( outfile , " %s " , def -> name );
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
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 ++ ]));
}
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
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 ++ ) {
903
904
905
906
907
if ( k != 0 )
fprintf ( outfile , "," );
arg = args [ k ++ ];
fprintf ( outfile , "$0x%" TCG_PRIlx , arg );
}
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
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
}
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
982
argument is tagged with TCG_CT_IALIAS . */
983
def -> args_ct [ i ] = def -> args_ct [ oarg ];
984
985
def -> args_ct [ oarg ]. ct = TCG_CT_ALIAS ;
def -> args_ct [ oarg ]. alias_index = i ;
986
def -> args_ct [ i ]. ct |= TCG_CT_IALIAS ;
987
def -> args_ct [ i ]. alias_index = oarg ;
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
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
} 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 ;
}
}
1042
1043
1044
1045
1046
/* 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 )
1047
1048
1049
1050
1051
{
memset ( dead_temps , 0 , s -> nb_globals );
memset ( dead_temps + s -> nb_globals , 1 , s -> nb_temps - s -> nb_globals );
}
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
/* 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 ++ ;
}
}
1070
1071
1072
/* Liveness analysis : update the opc_dead_iargs array to tell if a
given input arguments is dead . Instructions updating dead
temporaries are removed . */
1073
static void tcg_liveness_analysis ( TCGContext * s )
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
{
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 :
1098
1099
{
int call_flags ;
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
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 :
1120
1121
1122
1123
1124
1125
1126
/* output args are dead */
for ( i = 0 ; i < nb_oargs ; i ++ ) {
arg = args [ i ];
dead_temps [ arg ] = 1 ;
}
1127
1128
1129
1130
1131
if ( ! ( call_flags & TCG_CALL_CONST )) {
/* globals are live (they may be used by the call) */
memset ( dead_temps , 0 , s -> nb_globals );
}
1132
1133
1134
1135
/* input args are live */
dead_iargs = 0 ;
for ( i = 0 ; i < nb_iargs ; i ++ ) {
arg = args [ i + nb_oargs ];
1136
1137
1138
1139
1140
if ( arg != TCG_CALL_DUMMY_ARG ) {
if ( dead_temps [ arg ]) {
dead_iargs |= ( 1 << i );
}
dead_temps [ arg ] = 0 ;
1141
1142
1143
}
}
s -> op_dead_iargs [ op_index ] = dead_iargs ;
1144
}
1145
args -- ;
1146
1147
1148
1149
1150
1151
1152
}
break ;
case INDEX_op_set_label :
args -- ;
/* mark end of basic block */
tcg_la_bb_end ( s , dead_temps );
break ;
1153
1154
1155
case INDEX_op_debug_insn_start :
args -= def -> nb_args ;
break ;
1156
1157
1158
1159
case INDEX_op_nopn :
nb_args = args [ - 1 ];
args -= nb_args ;
break ;
1160
1161
1162
1163
1164
case INDEX_op_discard :
args -- ;
/* mark the temporary as dead */
dead_temps [ args [ 0 ]] = 1 ;
break ;
1165
1166
1167
1168
case INDEX_op_end :
break ;
/* XXX: optimize by hardcoding common cases (e.g. triadic ops) */
default :
1169
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1171
args -= def -> nb_args ;
nb_iargs = def -> nb_iargs ;
nb_oargs = def -> nb_oargs ;
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/* 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 );
1183
# ifdef CONFIG_PROFILER
1184
s -> del_op_count ++ ;
1185
# endif
1186
1187
} else {
do_not_remove :
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/* 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 );
1209
}
1210
dead_temps [ arg ] = 0 ;
1211
}
1212
s -> op_dead_iargs [ op_index ] = dead_iargs ;
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1234
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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 ];
1243
printf ( " %10s: " , tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), i ));
1244
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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 ],
1268
tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), s -> reg_to_temp [ i ]));
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1286
}
}
}
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 ]);
1287
goto fail ;
1288
1289
1290
1291
1292
1293
1294
1295
1296
}
}
}
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 " ,
1297
tcg_get_arg_str_idx ( s , buf , sizeof ( buf ), k ));
1298
fail :
1299
1300
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1310
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1312
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 )
1313
tcg_abort ();
1314
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1328
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1332
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 );
1333
tcg_out_st ( s , ts -> type , reg , ts -> mem_reg , ts -> mem_offset );
1334
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1343
1344
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1347
1348
}
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 */
1349
for ( i = 0 ; i < ARRAY_SIZE ( tcg_target_reg_alloc_order ); i ++ ) {
1350
1351
1352
1353
1354
1355
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 */
1356
for ( i = 0 ; i < ARRAY_SIZE ( tcg_target_reg_alloc_order ); i ++ ) {
1357
1358
1359
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reg = tcg_target_reg_alloc_order [ i ];
if ( tcg_regset_test_reg ( reg_ct , reg )) {
tcg_reg_free ( s , reg );
return reg ;
}
}
tcg_abort ();
}
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1399
/* 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 ();
}
}
}
1400
/* save globals to their cannonical location and assume they can be
1401
1402
1403
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 )
1404
{
1405
int i ;
1406
1407
for ( i = 0 ; i < s -> nb_globals ; i ++ ) {
1408
temp_save ( s , i , allocated_regs ) ;
1409
}
1410
1411
1412
}
/* at the end of a basic block , we assume all temporaries are dead and
1413
1414
all globals are stored at their canonical location . */
static void tcg_reg_alloc_bb_end ( TCGContext * s , TCGRegSet allocated_regs )
1415
1416
1417
1418
{
TCGTemp * ts ;
int i ;
1419
1420
for ( i = s -> nb_globals ; i < s -> nb_temps ; i ++ ) {
ts = & s -> temps [ i ] ;
1421
1422
1423
1424
1425
1426
1427
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 ;
1428
1429
}
}
1430
1431
save_globals ( s , allocated_regs ) ;
1432
1433
1434
1435
}
# define IS_DEAD_IARG ( n ) (( dead_iargs >> ( n )) & 1 )
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
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
1449
/* The movi is not explicitly generated here */
1450
1451
1452
1453
1454
1455
1456
if ( ots -> val_type == TEMP_VAL_REG )
s -> reg_to_temp [ ots -> reg ] = - 1 ;
ots -> val_type = TEMP_VAL_CONST ;
ots -> val = val ;
}
}
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
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 ] ;
1469
/* XXX: always mark arg dead if IS_DEAD_IARG(0) */
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
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 ) ;
}
1494
tcg_out_ld ( s , ts -> type , reg , ts -> mem_reg , ts -> mem_offset ) ;
1495
} else if ( ts -> val_type == TEMP_VAL_CONST ) {
1496
if ( ots -> fixed_reg ) {
1497
reg = ots -> reg ;
1498
tcg_out_movi ( s , ots -> type , reg , ts -> val ) ;
1499
} else {
1500
1501
1502
1503
1504
1505
/* 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 ;
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
}
} 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 ) ;
1546
tcg_out_ld ( s , ts -> type , reg , ts -> mem_reg , ts -> mem_offset ) ;
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
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 {
1558
/* need to move to a register */
1559
1560
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , allocated_regs ) ;
tcg_out_movi ( s , ts -> type , reg , ts -> val ) ;
1561
1562
1563
1564
ts -> val_type = TEMP_VAL_REG ;
ts -> reg = reg ;
ts -> mem_coherent = 0 ;
s -> reg_to_temp [ reg ] = arg ;
1565
1566
1567
}
}
assert ( ts -> val_type == TEMP_VAL_REG ) ;
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
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 ;
}
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
}
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 : ;
}
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
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 ;
}
1611
1612
}
}
1613
1614
1615
1616
1617
1618
1619
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 );
}
1620
}
1621
1622
1623
1624
1625
1626
/* 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 );
1627
}
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
/* 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 );
1646
}
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
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 ;
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
}
}
/* 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 );
}
}
}
1677
1678
1679
1680
1681
1682
# ifdef TCG_TARGET_STACK_GROWSUP
# define STACK_DIR ( x ) ( - ( x ))
# else
# define STACK_DIR ( x ) ( x )
# endif
1683
1684
1685
1686
1687
1688
1689
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 ;
1690
tcg_target_long stack_offset , call_stack_size , func_addr ;
1691
int const_func_arg , allocate_args ;
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
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 );
1712
1713
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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 ));
}
1716
1717
stack_offset = TCG_TARGET_CALL_STACK_OFFSET ;
1718
1719
for ( i = nb_regs ; i < nb_params ; i ++ ) {
arg = args [ nb_oargs + i ];
1720
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1722
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1733
1734
1735
1736
1737
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1739
1740
1741
# 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 ();
}
1742
}
1743
1744
1745
# ifndef TCG_TARGET_STACK_GROWSUP
stack_offset += sizeof ( tcg_target_long );
# endif
1746
1747
1748
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1750
1751
}
/* 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 ();
1767
}
1768
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 ];
1776
func_addr = ts -> val ;
1777
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1779
const_func_arg = 0 ;
if ( ts -> val_type == TEMP_VAL_MEM ) {
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , allocated_regs );
1780
tcg_out_ld ( s , ts -> type , reg , ts -> mem_reg , ts -> mem_offset );
1781
func_arg = reg ;
1782
tcg_regset_set_reg ( allocated_regs , reg );
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1789
} 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 ;
1790
tcg_regset_set_reg ( allocated_regs , reg );
1791
} else if ( ts -> val_type == TEMP_VAL_CONST ) {
1792
if ( tcg_target_const_match ( func_addr , arg_ct )) {
1793
const_func_arg = 1 ;
1794
func_arg = func_addr ;
1795
1796
} else {
reg = tcg_reg_alloc ( s , arg_ct -> u . regs , allocated_regs );
1797
tcg_out_movi ( s , ts -> type , reg , func_addr );
1798
func_arg = reg ;
1799
tcg_regset_set_reg ( allocated_regs , reg );
1800
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1803
}
} else {
tcg_abort ();
}
1804
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1806
/* mark dead temporaries and free the associated registers */
1807
for ( i = 0 ; i < nb_iargs ; i ++ ) {
1808
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1810
arg = args [ nb_oargs + i ];
if ( IS_DEAD_IARG ( i )) {
ts = & s -> temps [ arg ];
1811
if ( ! ts -> fixed_reg ) {
1812
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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 . */
1828
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1830
if ( ! ( flags & TCG_CALL_CONST )) {
save_globals ( s , allocated_regs );
}
1831
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1833
tcg_out_op ( s , opc , & func_arg , & const_func_arg );
1834
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1836
if ( allocate_args ) {
tcg_out_addi ( s , TCG_REG_CALL_STACK , STACK_DIR ( call_stack_size ));
}
1837
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1841
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/* 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 ];
1843
assert ( s -> reg_to_temp [ reg ] == - 1 );
1844
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1862
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
1863
static int64_t tcg_table_op_count [ NB_OPS ];
1864
1865
1866
1867
1868
void dump_op_count ( void )
{
int i ;
FILE * f ;
1869
f = fopen ( "/tmp/op.log" , "w" );
1870
for ( i = INDEX_op_end ; i < NB_OPS ; i ++ ) {
1871
fprintf ( f , "%s %" PRId64 " \n " , tcg_op_defs [ i ]. name , tcg_table_op_count [ i ]);
1872
1873
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1878
}
fclose ( f );
}
# endif
static inline int tcg_gen_code_common ( TCGContext * s , uint8_t * gen_code_buf ,
1879
long search_pc )
1880
{
1881
int opc , op_index ;
1882
1883
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1885
1886
const TCGOpDef * def ;
unsigned int dead_iargs ;
const TCGArg * args ;
# ifdef DEBUG_DISAS
1887
if ( unlikely ( qemu_loglevel_mask ( CPU_LOG_TB_OP ))) {
1888
qemu_log ( "OP: \n " );
1889
tcg_dump_ops ( s , logfile );
1890
qemu_log ( " \n " );
1891
1892
1893
}
# endif
1894
1895
1896
# ifdef CONFIG_PROFILER
s -> la_time -= profile_getclock ();
# endif
1897
tcg_liveness_analysis ( s );
1898
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# ifdef CONFIG_PROFILER
s -> la_time += profile_getclock ();
# endif
1901
1902
# ifdef DEBUG_DISAS
1903
if ( unlikely ( qemu_loglevel_mask ( CPU_LOG_TB_OP_OPT ))) {
1904
qemu_log ( "OP after la: \n " );
1905
tcg_dump_ops ( s , logfile );
1906
qemu_log ( " \n " );
1907
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1912
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1916
}
# 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 ;
1917
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1919
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for (;;) {
opc = gen_opc_buf [ op_index ];
# ifdef CONFIG_PROFILER
1921
tcg_table_op_count [ opc ] ++ ;
1922
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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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1942
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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1944
1945
case INDEX_op_debug_insn_start :
/* debug instruction */
break ;
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1953
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 ;
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1955
1956
1957
1958
case INDEX_op_discard :
{
TCGTemp * ts ;
ts = & s -> temps [ args [ 0 ]];
/* mark the temporary as dead */
1959
if ( ! ts -> fixed_reg ) {
1960
1961
1962
1963
1964
1965
if ( ts -> val_type == TEMP_VAL_REG )
s -> reg_to_temp [ ts -> reg ] = - 1 ;
ts -> val_type = TEMP_VAL_DEAD ;
}
}
break ;
1966
case INDEX_op_set_label :
1967
tcg_reg_alloc_bb_end ( s , s -> reserved_regs );
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
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
1985
next :
1986
if ( search_pc >= 0 && search_pc < s -> code_ptr - gen_code_buf ) {
1987
return op_index ;
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
}
op_index ++ ;
# ifndef NDEBUG
check_regs ( s );
# endif
}
the_end :
return - 1 ;
}
1998
int tcg_gen_code ( TCGContext * s , uint8_t * gen_code_buf )
1999
2000
2001
2002
2003
{
# ifdef CONFIG_PROFILER
{
int n ;
n = ( gen_opc_ptr - gen_opc_buf );
2004
2005
2006
2007
2008
2009
2010
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 ;
2011
2012
2013
}
# endif
2014
tcg_gen_code_common ( s , gen_code_buf , - 1 );
2015
2016
2017
2018
2019
2020
2021
/* flush instruction cache */
flush_icache_range (( unsigned long ) gen_code_buf ,
( unsigned long ) s -> code_ptr );
return s -> code_ptr - gen_code_buf ;
}
2022
/* Return the index of the micro operation such as the pc after is <
2023
2024
2025
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 . */
2026
int tcg_gen_code_search_pc ( TCGContext * s , uint8_t * gen_code_buf , long offset )
2027
{
2028
return tcg_gen_code_common ( s , gen_code_buf , offset );
2029
}
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
# 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 , "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
2079
void tcg_dump_info ( FILE * f ,
2080
2081
int ( * cpu_fprintf )( FILE * f , const char * fmt , ...))
{
2082
cpu_fprintf ( f , "[TCG profiler not compiled] \n " );
2083
2084
}
# endif