/*
* Tiny Code Generator for QEMU
*
* Copyright (c) 2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "tcg-target.h"
#if TCG_TARGET_REG_BITS == 32
typedef int32_t tcg_target_long;
typedef uint32_t tcg_target_ulong;
#define TCG_PRIlx PRIx32
#define TCG_PRIld PRId32
#elif TCG_TARGET_REG_BITS == 64
typedef int64_t tcg_target_long;
typedef uint64_t tcg_target_ulong;
#define TCG_PRIlx PRIx64
#define TCG_PRIld PRId64
#else
#error unsupported
#endif
#if TCG_TARGET_NB_REGS <= 32
typedef uint32_t TCGRegSet;
#elif TCG_TARGET_NB_REGS <= 64
typedef uint64_t TCGRegSet;
#else
#error unsupported
#endif
enum {
#define DEF(s, n, copy_size) INDEX_op_ ## s,
#include "tcg-opc.h"
#undef DEF
NB_OPS,
};
#define tcg_regset_clear(d) (d) = 0
#define tcg_regset_set(d, s) (d) = (s)
#define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
#define tcg_regset_set_reg(d, r) (d) |= 1 << (r)
#define tcg_regset_reset_reg(d, r) (d) &= ~(1 << (r))
#define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
#define tcg_regset_or(d, a, b) (d) = (a) | (b)
#define tcg_regset_and(d, a, b) (d) = (a) & (b)
#define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
#define tcg_regset_not(d, a) (d) = ~(a)
typedef struct TCGRelocation {
struct TCGRelocation *next;
int type;
uint8_t *ptr;
tcg_target_long addend;
} TCGRelocation;
typedef struct TCGLabel {
int has_value;
union {
tcg_target_ulong value;
TCGRelocation *first_reloc;
} u;
} TCGLabel;
typedef struct TCGPool {
struct TCGPool *next;
int size;
uint8_t data[0];
} TCGPool;
#define TCG_POOL_CHUNK_SIZE 32768
#define TCG_MAX_LABELS 512
#define TCG_MAX_TEMPS 256
typedef int TCGType;
#define TCG_TYPE_I32 0
#define TCG_TYPE_I64 1
#if TCG_TARGET_REG_BITS == 32
#define TCG_TYPE_PTR TCG_TYPE_I32
#else
#define TCG_TYPE_PTR TCG_TYPE_I64
#endif
typedef tcg_target_ulong TCGArg;
/* call flags */
#define TCG_CALL_TYPE_MASK 0x000f
#define TCG_CALL_TYPE_STD 0x0000 /* standard C call */
#define TCG_CALL_TYPE_REGPARM_1 0x0001 /* i386 style regparm call (1 reg) */
#define TCG_CALL_TYPE_REGPARM_2 0x0002 /* i386 style regparm call (2 regs) */
#define TCG_CALL_TYPE_REGPARM 0x0003 /* i386 style regparm call (3 regs) */
typedef enum {
TCG_COND_EQ,
TCG_COND_NE,
TCG_COND_LT,
TCG_COND_GE,
TCG_COND_LE,
TCG_COND_GT,
/* unsigned */
TCG_COND_LTU,
TCG_COND_GEU,
TCG_COND_LEU,
TCG_COND_GTU,
} TCGCond;
#define TEMP_VAL_DEAD 0
#define TEMP_VAL_REG 1
#define TEMP_VAL_MEM 2
#define TEMP_VAL_CONST 3
/* XXX: optimize memory layout */
typedef struct TCGTemp {
TCGType base_type;
TCGType type;
int val_type;
int reg;
tcg_target_long val;
int mem_reg;
tcg_target_long mem_offset;
unsigned int fixed_reg:1;
unsigned int mem_coherent:1;
unsigned int mem_allocated:1;
const char *name;
} TCGTemp;
typedef struct TCGHelperInfo {
void *func;
const char *name;
} TCGHelperInfo;
typedef struct TCGContext TCGContext;
typedef void TCGMacroFunc(TCGContext *s, int macro_id, const int *dead_args);
struct TCGContext {
uint8_t *pool_cur, *pool_end;
TCGPool *pool_first, *pool_current;
TCGLabel *labels;
int nb_labels;
TCGTemp *temps; /* globals first, temps after */
int nb_globals;
int nb_temps;
/* constant indexes (end of temp array) */
int const_start;
int const_end;
/* goto_tb support */
uint8_t *code_buf;
unsigned long *tb_next;
uint16_t *tb_next_offset;
uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
uint16_t *op_dead_iargs; /* for each operation, each bit tells if the
corresponding input argument is dead */
/* tells in which temporary a given register is. It does not take
into account fixed registers */
int reg_to_temp[TCG_TARGET_NB_REGS];
TCGRegSet reserved_regs;
tcg_target_long current_frame_offset;
tcg_target_long frame_start;
tcg_target_long frame_end;
int frame_reg;
uint8_t *code_ptr;
TCGTemp static_temps[TCG_MAX_TEMPS];
TCGMacroFunc *macro_func;
TCGHelperInfo *helpers;
int nb_helpers;
int allocated_helpers;
};
extern TCGContext tcg_ctx;
extern uint16_t *gen_opc_ptr;
extern TCGArg *gen_opparam_ptr;
extern uint16_t gen_opc_buf[];
extern TCGArg gen_opparam_buf[];
/* pool based memory allocation */
void *tcg_malloc_internal(TCGContext *s, int size);
void tcg_pool_reset(TCGContext *s);
void tcg_pool_delete(TCGContext *s);
static inline void *tcg_malloc(int size)
{
TCGContext *s = &tcg_ctx;
uint8_t *ptr, *ptr_end;
size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
ptr = s->pool_cur;
ptr_end = ptr + size;
if (unlikely(ptr_end > s->pool_end)) {
return tcg_malloc_internal(&tcg_ctx, size);
} else {
s->pool_cur = ptr_end;
return ptr;
}
}
void tcg_context_init(TCGContext *s);
void tcg_func_start(TCGContext *s);
int dyngen_code(TCGContext *s, uint8_t *gen_code_buf);
int dyngen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf,
const uint8_t *searched_pc);
void tcg_set_frame(TCGContext *s, int reg,
tcg_target_long start, tcg_target_long size);
void tcg_set_macro_func(TCGContext *s, TCGMacroFunc *func);
int tcg_global_reg_new(TCGType type, int reg, const char *name);
int tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset,
const char *name);
int tcg_temp_new(TCGType type);
char *tcg_get_arg_str(TCGContext *s, char *buf, int buf_size, TCGArg arg);
#define TCG_CT_ALIAS 0x80
#define TCG_CT_IALIAS 0x40
#define TCG_CT_REG 0x01
#define TCG_CT_CONST 0x02 /* any constant of register size */
typedef struct TCGArgConstraint {
uint32_t ct;
union {
TCGRegSet regs;
} u;
} TCGArgConstraint;
#define TCG_MAX_OP_ARGS 16
#define TCG_OPF_BB_END 0x01 /* instruction defines the end of a basic
block */
#define TCG_OPF_CALL_CLOBBER 0x02 /* instruction clobbers call registers */
typedef struct TCGOpDef {
const char *name;
uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
uint8_t flags;
uint16_t copy_size;
TCGArgConstraint *args_ct;
int *sorted_args;
} TCGOpDef;
typedef struct TCGTargetOpDef {
int op;
const char *args_ct_str[TCG_MAX_OP_ARGS];
} TCGTargetOpDef;
extern TCGOpDef tcg_op_defs[];
void tcg_target_init(TCGContext *s);
#define tcg_abort() \
do {\
fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
abort();\
} while (0)
void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
void tcg_gen_call(TCGContext *s, TCGArg func, unsigned int flags,
unsigned int nb_rets, const TCGArg *rets,
unsigned int nb_params, const TCGArg *args1);
void tcg_gen_shifti_i64(TCGArg ret, TCGArg arg1,
int c, int right, int arith);
/* only used for debugging purposes */
void tcg_register_helper(void *func, const char *name);
#define TCG_HELPER(func) tcg_register_helper(func, #func)
const char *tcg_helper_get_name(TCGContext *s, void *func);
void tcg_dump_ops(TCGContext *s, FILE *outfile);
void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
int tcg_const_i32(int32_t val);
int tcg_const_i64(int64_t val);
#if TCG_TARGET_REG_BITS == 32
#define tcg_const_ptr tcg_const_i32
#define tcg_add_ptr tcg_add_i32
#define tcg_sub_ptr tcg_sub_i32
#else
#define tcg_const_ptr tcg_const_i64
#define tcg_add_ptr tcg_add_i64
#define tcg_sub_ptr tcg_sub_i64
#endif
void tcg_out_reloc(TCGContext *s, uint8_t *code_ptr, int type,
int label_index, long addend);
void tcg_reg_alloc_start(TCGContext *s);
void tcg_reg_alloc_bb_end(TCGContext *s);
void tcg_liveness_analysis(TCGContext *s);
const TCGArg *tcg_gen_code_op(TCGContext *s, int opc, const TCGArg *args1,
unsigned int dead_iargs);
const TCGArg *dyngen_op(TCGContext *s, int opc, const TCGArg *opparam_ptr);
/* tcg-runtime.c */
int64_t tcg_helper_shl_i64(int64_t arg1, int64_t arg2);
int64_t tcg_helper_shr_i64(int64_t arg1, int64_t arg2);
int64_t tcg_helper_sar_i64(int64_t arg1, int64_t arg2);
int64_t tcg_helper_div_i64(int64_t arg1, int64_t arg2);
int64_t tcg_helper_rem_i64(int64_t arg1, int64_t arg2);
uint64_t tcg_helper_divu_i64(uint64_t arg1, uint64_t arg2);
uint64_t tcg_helper_remu_i64(uint64_t arg1, uint64_t arg2);
