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tcg: Change ts->mem_reg to ts->mem_base 

Chain the temporaries together via pointers intstead of indices.
The mem_reg value is now mem_base->reg.  This will be important later.

This does require that the frame pointer have a global temporary
allocated for it.  This is simple bar the existing reserved_regs check.

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
master
Richard Henderson 2013-09-18 14:12:53 -07:00
parent e1ccc05444
commit b3a6293956
2 changed files with 39 additions and 32 deletions
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67
tcg/tcg.c
View File

@ -403,13 +403,6 @@ void tcg_prologue_init(TCGContext *s)
#endif
}
void tcg_set_frame(TCGContext *s, int reg, intptr_t start, intptr_t size)
{
s->frame_start = start;
s->frame_end = start + size;
s->frame_reg = reg;
}
void tcg_func_start(TCGContext *s)
{
tcg_pool_reset(s);
@ -439,19 +432,15 @@ static inline void tcg_temp_alloc(TCGContext *s, int n)
tcg_abort();
}
static inline int tcg_global_reg_new_internal(TCGType type, int reg,
const char *name)
static int tcg_global_reg_new_internal(TCGContext *s, TCGType type,
int reg, const char *name)
{
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))
if (TCG_TARGET_REG_BITS == 32 && type != TCG_TYPE_I32) {
tcg_abort();
}
idx = s->nb_globals;
tcg_temp_alloc(s, s->nb_globals + 1);
ts = &s->temps[s->nb_globals];
@ -465,19 +454,36 @@ static inline int tcg_global_reg_new_internal(TCGType type, int reg,
return idx;
}
TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name)
void tcg_set_frame(TCGContext *s, int reg, intptr_t start, intptr_t size)
{
int idx;
s->frame_start = start;
s->frame_end = start + size;
idx = tcg_global_reg_new_internal(s, TCG_TYPE_PTR, reg, "_frame");
s->frame_temp = &s->temps[idx];
}
idx = tcg_global_reg_new_internal(TCG_TYPE_I32, reg, name);
TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name)
{
TCGContext *s = &tcg_ctx;
int idx;
if (tcg_regset_test_reg(s->reserved_regs, reg)) {
tcg_abort();
}
idx = tcg_global_reg_new_internal(s, TCG_TYPE_I32, reg, name);
return MAKE_TCGV_I32(idx);
}
TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name)
{
TCGContext *s = &tcg_ctx;
int idx;
idx = tcg_global_reg_new_internal(TCG_TYPE_I64, reg, name);
if (tcg_regset_test_reg(s->reserved_regs, reg)) {
tcg_abort();
}
idx = tcg_global_reg_new_internal(s, TCG_TYPE_I64, reg, name);
return MAKE_TCGV_I64(idx);
}
@ -486,7 +492,7 @@ int tcg_global_mem_new_internal(TCGType type, TCGv_ptr base,
{
TCGContext *s = &tcg_ctx;
TCGTemp *ts, *base_ts = &s->temps[GET_TCGV_PTR(base)];
int idx, reg = base_ts->reg;
int idx;
idx = s->nb_globals;
#if TCG_TARGET_REG_BITS == 32
@ -498,7 +504,7 @@ int tcg_global_mem_new_internal(TCGType type, TCGv_ptr base,
ts->type = TCG_TYPE_I32;
ts->fixed_reg = 0;
ts->mem_allocated = 1;
ts->mem_reg = reg;
ts->mem_base = base_ts;
#ifdef HOST_WORDS_BIGENDIAN
ts->mem_offset = offset + 4;
#else
@ -513,7 +519,7 @@ int tcg_global_mem_new_internal(TCGType type, TCGv_ptr base,
ts->type = TCG_TYPE_I32;
ts->fixed_reg = 0;
ts->mem_allocated = 1;
ts->mem_reg = reg;
ts->mem_base = base_ts;
#ifdef HOST_WORDS_BIGENDIAN
ts->mem_offset = offset;
#else
@ -533,7 +539,7 @@ int tcg_global_mem_new_internal(TCGType type, TCGv_ptr base,
ts->type = type;
ts->fixed_reg = 0;
ts->mem_allocated = 1;
ts->mem_reg = reg;
ts->mem_base = base_ts;
ts->mem_offset = offset;
ts->name = name;
s->nb_globals++;
@ -1587,7 +1593,8 @@ static void dump_regs(TCGContext *s)
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]);
printf("%d(%s)", (int)ts->mem_offset,
tcg_target_reg_names[ts->mem_base->reg]);
break;
case TEMP_VAL_CONST:
printf("$0x%" TCG_PRIlx, ts->val);
@ -1660,7 +1667,7 @@ static void temp_allocate_frame(TCGContext *s, int temp)
tcg_abort();
}
ts->mem_offset = s->current_frame_offset;
ts->mem_reg = s->frame_reg;
ts->mem_base = s->frame_temp;
ts->mem_allocated = 1;
s->current_frame_offset += sizeof(tcg_target_long);
}
@ -1678,7 +1685,7 @@ static inline void tcg_reg_sync(TCGContext *s, int reg)
if (!ts->mem_allocated) {
temp_allocate_frame(s, temp);
}
tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
tcg_out_st(s, ts->type, reg, ts->mem_base->reg, ts->mem_offset);
}
ts->mem_coherent = 1;
}
@ -1894,7 +1901,7 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def,
ts->reg = tcg_reg_alloc(s, tcg_target_available_regs[itype],
allocated_regs);
if (ts->val_type == TEMP_VAL_MEM) {
tcg_out_ld(s, itype, ts->reg, ts->mem_reg, ts->mem_offset);
tcg_out_ld(s, itype, ts->reg, ts->mem_base->reg, ts->mem_offset);
ts->mem_coherent = 1;
} else if (ts->val_type == TEMP_VAL_CONST) {
tcg_out_movi(s, itype, ts->reg, ts->val);
@ -1913,7 +1920,7 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def,
if (!ots->mem_allocated) {
temp_allocate_frame(s, args[0]);
}
tcg_out_st(s, otype, ts->reg, ots->mem_reg, ots->mem_offset);
tcg_out_st(s, otype, ts->reg, ots->mem_base->reg, ots->mem_offset);
if (IS_DEAD_ARG(1)) {
temp_dead(s, args[1]);
}
@ -1988,7 +1995,7 @@ static void tcg_reg_alloc_op(TCGContext *s,
ts = &s->temps[arg];
if (ts->val_type == TEMP_VAL_MEM) {
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
tcg_out_ld(s, ts->type, reg, ts->mem_base->reg, ts->mem_offset);
ts->val_type = TEMP_VAL_REG;
ts->reg = reg;
ts->mem_coherent = 1;
@ -2182,7 +2189,7 @@ static void tcg_reg_alloc_call(TCGContext *s, int nb_oargs, int nb_iargs,
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_ld(s, ts->type, reg, ts->mem_base->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],
@ -2212,7 +2219,7 @@ static void tcg_reg_alloc_call(TCGContext *s, int nb_oargs, int nb_iargs,
tcg_out_mov(s, ts->type, reg, ts->reg);
}
} else if (ts->val_type == TEMP_VAL_MEM) {
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
tcg_out_ld(s, ts->type, reg, ts->mem_base->reg, ts->mem_offset);
} else if (ts->val_type == TEMP_VAL_CONST) {
/* XXX: sign extend ? */
tcg_out_movi(s, ts->type, reg, ts->val);

4
tcg/tcg.h
View File

@ -449,7 +449,6 @@ typedef enum TCGTempVal {
typedef struct TCGTemp {
unsigned int reg:8;
unsigned int mem_reg:8;
TCGTempVal val_type:8;
TCGType base_type:8;
TCGType type:8;
@ -462,6 +461,7 @@ typedef struct TCGTemp {
unsigned int temp_allocated:1; /* never used for code gen */
tcg_target_long val;
struct TCGTemp *mem_base;
intptr_t mem_offset;
const char *name;
} TCGTemp;
@ -515,7 +515,7 @@ struct TCGContext {
intptr_t current_frame_offset;
intptr_t frame_start;
intptr_t frame_end;
int frame_reg;
TCGTemp *frame_temp;
tcg_insn_unit *code_ptr;