diff options
Diffstat (limited to 'tcg/tcg.h')
| -rw-r--r-- | tcg/tcg.h | 421 |
1 files changed, 421 insertions, 0 deletions
diff --git a/tcg/tcg.h b/tcg/tcg.h new file mode 100644 index 0000000..bc5b902 --- /dev/null +++ b/tcg/tcg.h @@ -0,0 +1,421 @@ +/* + * 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] __attribute__ ((aligned)); +} TCGPool; + +#define TCG_POOL_CHUNK_SIZE 32768 + +#define TCG_MAX_LABELS 512 + +#define TCG_MAX_TEMPS 512 + +/* when the size of the arguments of a called function is smaller than + this value, they are statically allocated in the TB stack frame */ +#define TCG_STATIC_CALL_ARGS_SIZE 128 + +typedef int TCGType; + +#define TCG_TYPE_I32 0 +#define TCG_TYPE_I64 1 +#define TCG_TYPE_COUNT 2 /* number of different types */ + +#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; + +/* Define a type and accessor macros for varables. Using a struct is + nice because it gives some level of type safely. Ideally the compiler + be able to see through all this. However in practice this is not true, + expecially on targets with braindamaged ABIs (e.g. i386). + We use plain int by default to avoid this runtime overhead. + Users of tcg_gen_* don't need to know about any of this, and should + treat TCGv as an opaque type. */ + +//#define DEBUG_TCGV 1 + +#ifdef DEBUG_TCGV + +typedef struct +{ + int n; +} TCGv; + +#define MAKE_TCGV(i) __extension__ \ + ({ TCGv make_tcgv_tmp = {i}; make_tcgv_tmp;}) +#define GET_TCGV(t) ((t).n) +#if TCG_TARGET_REG_BITS == 32 +#define TCGV_HIGH(t) MAKE_TCGV(GET_TCGV(t) + 1) +#endif + +#else /* !DEBUG_TCGV */ + +typedef int TCGv; +#define MAKE_TCGV(x) (x) +#define GET_TCGV(t) (t) +#if TCG_TARGET_REG_BITS == 32 +#define TCGV_HIGH(t) ((t) + 1) +#endif + +#endif /* DEBUG_TCGV */ + +/* Dummy definition to avoid compiler warnings. */ +#define TCGV_UNUSED(x) x = MAKE_TCGV(-1) + +/* 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) */ +/* A pure function only reads its arguments and globals variables and + cannot raise exceptions. Hence a call to a pure function can be + safely suppressed if the return value is not used. */ +#define TCG_CALL_PURE 0x0010 + +/* used to align parameters */ +#define TCG_CALL_DUMMY_TCGV MAKE_TCGV(-1) +#define TCG_CALL_DUMMY_ARG ((TCGArg)(-1)) + +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; + unsigned int temp_local:1; /* If true, the temp is saved accross + basic blocks. Otherwise, it is not + preserved accross basic blocks. */ + unsigned int temp_allocated:1; /* never used for code gen */ + /* index of next free temp of same base type, -1 if end */ + int next_free_temp; + const char *name; +} TCGTemp; + +typedef struct TCGHelperInfo { + tcg_target_ulong func; + const char *name; +} TCGHelperInfo; + +typedef struct TCGContext TCGContext; + +struct TCGContext { + uint8_t *pool_cur, *pool_end; + TCGPool *pool_first, *pool_current; + TCGLabel *labels; + int nb_labels; + TCGTemp *temps; /* globals first, temps after */ + int nb_globals; + int nb_temps; + /* index of free temps, -1 if none */ + int first_free_temp[TCG_TYPE_COUNT * 2]; + + /* 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 */ + + /* liveness analysis */ + 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]; + + TCGHelperInfo *helpers; + int nb_helpers; + int allocated_helpers; + int helpers_sorted; + +#ifdef CONFIG_PROFILER + /* profiling info */ + int64_t tb_count1; + int64_t tb_count; + int64_t op_count; /* total insn count */ + int op_count_max; /* max insn per TB */ + int64_t temp_count; + int temp_count_max; + int64_t old_op_count; + int64_t del_op_count; + int64_t code_in_len; + int64_t code_out_len; + int64_t interm_time; + int64_t code_time; + int64_t la_time; + int64_t restore_count; + int64_t restore_time; +#endif +}; + +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, long offset); + +void tcg_set_frame(TCGContext *s, int reg, + tcg_target_long start, tcg_target_long size); +TCGv tcg_global_reg_new(TCGType type, int reg, const char *name); +TCGv tcg_global_reg2_new_hack(TCGType type, int reg1, int reg2, + const char *name); +TCGv tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset, + const char *name); +TCGv tcg_temp_new_internal(TCGType type, int temp_local); +static inline TCGv tcg_temp_new(TCGType type) +{ + return tcg_temp_new_internal(type, 0); +} +static inline TCGv tcg_temp_local_new(TCGType type) +{ + return tcg_temp_new_internal(type, 1); +} +void tcg_temp_free(TCGv arg); +char *tcg_get_arg_str(TCGContext *s, char *buf, int buf_size, TCGv arg); +void tcg_dump_info(FILE *f, + int (*cpu_fprintf)(FILE *f, const char *fmt, ...)); + +#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 { + uint16_t ct; + uint8_t alias_index; + 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 + and potentially update globals. */ +#define TCG_OPF_SIDE_EFFECTS 0x04 /* instruction has side effects : it + cannot be removed if its output + are not used */ + +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); +void tcg_target_qemu_prologue(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, TCGv func, unsigned int flags, + unsigned int nb_rets, const TCGv *rets, + unsigned int nb_params, const TCGv *args1); +void tcg_gen_shifti_i64(TCGv ret, TCGv 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); +TCGv tcg_const_i32(int32_t val); +TCGv 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); +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); + +extern uint8_t code_gen_prologue[]; +#if defined(__powerpc__) && !defined(__powerpc64__) +#define tcg_qemu_tb_exec(tb_ptr) \ + ((long REGPARM __attribute__ ((longcall)) (*)(void *))code_gen_prologue)(tb_ptr) +#else +#define tcg_qemu_tb_exec(tb_ptr) ((long REGPARM (*)(void *))code_gen_prologue)(tb_ptr) +#endif |