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unicorn/qemu/tcg/tcg.h
Peter Crosthwaite a591219ad6
cpu-defs: Move CPU_TEMP_BUF_NLONGS to tcg 
The usages of this define are pure TCG and there is no architecture
specific variation of the value. Localise it to the TCG engine to
remove another architecture agnostic piece from cpu-defs.h.

This follows on from a28177820a868eafda8fab007561cc19f41941f4 where
temp_buf was moved out of the CPU_COMMON obsoleting the need for
the super early definition.

Backports commit 6e0b07306d1793e8402dd218d2e38a7377b5fc27 from qemu
2018-02-17 15:23:15 -05:00

1145 lines
36 KiB
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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.
*/
#ifndef TCG_H
#define TCG_H
#include "qemu-common.h"
#include "qemu/bitops.h"
#include "tcg-target.h"
#include "exec/exec-all.h"
#include "uc_priv.h"
#define CPU_TEMP_BUF_NLONGS 128
/* Default target word size to pointer size. */
#ifndef TCG_TARGET_REG_BITS
# if UINTPTR_MAX == UINT32_MAX
# define TCG_TARGET_REG_BITS 32
# elif UINTPTR_MAX == UINT64_MAX
# define TCG_TARGET_REG_BITS 64
# else
# error Unknown pointer size for tcg target
# endif
#endif
#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
#if TCG_TARGET_REG_BITS == 32
/* Turn some undef macros into false macros. */
#define TCG_TARGET_HAS_extrl_i64_i32 0
#define TCG_TARGET_HAS_extrh_i64_i32 0
#define TCG_TARGET_HAS_div_i64 0
#define TCG_TARGET_HAS_rem_i64 0
#define TCG_TARGET_HAS_div2_i64 0
#define TCG_TARGET_HAS_rot_i64 0
#define TCG_TARGET_HAS_ext8s_i64 0
#define TCG_TARGET_HAS_ext16s_i64 0
#define TCG_TARGET_HAS_ext32s_i64 0
#define TCG_TARGET_HAS_ext8u_i64 0
#define TCG_TARGET_HAS_ext16u_i64 0
#define TCG_TARGET_HAS_ext32u_i64 0
#define TCG_TARGET_HAS_bswap16_i64 0
#define TCG_TARGET_HAS_bswap32_i64 0
#define TCG_TARGET_HAS_bswap64_i64 0
#define TCG_TARGET_HAS_neg_i64 0
#define TCG_TARGET_HAS_not_i64 0
#define TCG_TARGET_HAS_andc_i64 0
#define TCG_TARGET_HAS_orc_i64 0
#define TCG_TARGET_HAS_eqv_i64 0
#define TCG_TARGET_HAS_nand_i64 0
#define TCG_TARGET_HAS_nor_i64 0
#define TCG_TARGET_HAS_deposit_i64 0
#define TCG_TARGET_HAS_movcond_i64 0
#define TCG_TARGET_HAS_add2_i64 0
#define TCG_TARGET_HAS_sub2_i64 0
#define TCG_TARGET_HAS_mulu2_i64 0
#define TCG_TARGET_HAS_muls2_i64 0
#define TCG_TARGET_HAS_muluh_i64 0
#define TCG_TARGET_HAS_mulsh_i64 0
/* Turn some undef macros into true macros. */
#define TCG_TARGET_HAS_add2_i32 1
#define TCG_TARGET_HAS_sub2_i32 1
#endif
#ifndef TCG_TARGET_deposit_i32_valid
#define TCG_TARGET_deposit_i32_valid(ofs, len) 1
#endif
#ifndef TCG_TARGET_deposit_i64_valid
#define TCG_TARGET_deposit_i64_valid(ofs, len) 1
#endif
/* Only one of DIV or DIV2 should be defined. */
#if defined(TCG_TARGET_HAS_div_i32)
#define TCG_TARGET_HAS_div2_i32 0
#elif defined(TCG_TARGET_HAS_div2_i32)
#define TCG_TARGET_HAS_div_i32 0
#define TCG_TARGET_HAS_rem_i32 0
#endif
#if defined(TCG_TARGET_HAS_div_i64)
#define TCG_TARGET_HAS_div2_i64 0
#elif defined(TCG_TARGET_HAS_div2_i64)
#define TCG_TARGET_HAS_div_i64 0
#define TCG_TARGET_HAS_rem_i64 0
#endif
/* For 32-bit targets, some sort of unsigned widening multiply is required. */
#if TCG_TARGET_REG_BITS == 32 \
&& !(defined(TCG_TARGET_HAS_mulu2_i32) \
|| defined(TCG_TARGET_HAS_muluh_i32))
# error "Missing unsigned widening multiply"
#endif
#ifndef TARGET_INSN_START_EXTRA_WORDS
# define TARGET_INSN_START_WORDS 1
#else
# define TARGET_INSN_START_WORDS (1 + TARGET_INSN_START_EXTRA_WORDS)
#endif
typedef enum TCGOpcode {
#define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
#include "tcg-opc.h"
#undef DEF
NB_OPS,
} TCGOpcode;
#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) |= 1L << (r)
#define tcg_regset_reset_reg(d, r) (d) &= ~(1L << (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)
#ifndef TCG_TARGET_INSN_UNIT_SIZE
# error "Missing TCG_TARGET_INSN_UNIT_SIZE"
#elif TCG_TARGET_INSN_UNIT_SIZE == 1
typedef uint8_t tcg_insn_unit;
#elif TCG_TARGET_INSN_UNIT_SIZE == 2
typedef uint16_t tcg_insn_unit;
#elif TCG_TARGET_INSN_UNIT_SIZE == 4
typedef uint32_t tcg_insn_unit;
#elif TCG_TARGET_INSN_UNIT_SIZE == 8
typedef uint64_t tcg_insn_unit;
#else
/* The port better have done this. */
#endif
typedef struct TCGRelocation {
struct TCGRelocation *next;
int type;
tcg_insn_unit *ptr;
intptr_t addend;
} TCGRelocation;
typedef struct TCGLabel {
unsigned has_value : 1;
unsigned id : 31;
union {
uintptr_t value;
tcg_insn_unit *value_ptr;
TCGRelocation *first_reloc;
} u;
} TCGLabel;
typedef struct TCGPool {
struct TCGPool *next;
int size;
uint8_t QEMU_ALIGN(8, data[0]);
} TCGPool;
#define TCG_POOL_CHUNK_SIZE 32768
#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 enum TCGType {
TCG_TYPE_I32,
TCG_TYPE_I64,
TCG_TYPE_COUNT, /* number of different types */
/* An alias for the size of the host register. */
#if TCG_TARGET_REG_BITS == 32
TCG_TYPE_REG = TCG_TYPE_I32,
#else
TCG_TYPE_REG = TCG_TYPE_I64,
#endif
/* An alias for the size of the native pointer. */
#if UINTPTR_MAX == UINT32_MAX
TCG_TYPE_PTR = TCG_TYPE_I32,
#else
TCG_TYPE_PTR = TCG_TYPE_I64,
#endif
/* An alias for the size of the target "long", aka register. */
#if TARGET_LONG_BITS == 64
TCG_TYPE_TL = TCG_TYPE_I64,
#else
TCG_TYPE_TL = TCG_TYPE_I32,
#endif
} TCGType;
/* Constants for qemu_ld and qemu_st for the Memory Operation field. */
typedef enum TCGMemOp {
MO_8 = 0,
MO_16 = 1,
MO_32 = 2,
MO_64 = 3,
MO_SIZE = 3, /* Mask for the above. */
MO_SIGN = 4, /* Sign-extended, otherwise zero-extended. */
MO_BSWAP = 8, /* Host reverse endian. */
#ifdef HOST_WORDS_BIGENDIAN
MO_LE = MO_BSWAP,
MO_BE = 0,
#else
MO_LE = 0,
MO_BE = MO_BSWAP,
#endif
#ifdef TARGET_WORDS_BIGENDIAN
MO_TE = MO_BE,
#else
MO_TE = MO_LE,
#endif
/* MO_UNALN accesses are never checked for alignment.
MO_ALIGN accesses will result in a call to the CPU's
do_unaligned_access hook if the guest address is not aligned.
The default depends on whether the target CPU defines ALIGNED_ONLY. */
MO_AMASK = 16,
#ifdef ALIGNED_ONLY
MO_ALIGN = 0,
MO_UNALN = MO_AMASK,
#else
MO_ALIGN = MO_AMASK,
MO_UNALN = 0,
#endif
/* Combinations of the above, for ease of use. */
MO_UB = MO_8,
MO_UW = MO_16,
MO_UL = MO_32,
MO_SB = MO_SIGN | MO_8,
MO_SW = MO_SIGN | MO_16,
MO_SL = MO_SIGN | MO_32,
MO_Q = MO_64,
MO_LEUW = MO_LE | MO_UW,
MO_LEUL = MO_LE | MO_UL,
MO_LESW = MO_LE | MO_SW,
MO_LESL = MO_LE | MO_SL,
MO_LEQ = MO_LE | MO_Q,
MO_BEUW = MO_BE | MO_UW,
MO_BEUL = MO_BE | MO_UL,
MO_BESW = MO_BE | MO_SW,
MO_BESL = MO_BE | MO_SL,
MO_BEQ = MO_BE | MO_Q,
MO_TEUW = MO_TE | MO_UW,
MO_TEUL = MO_TE | MO_UL,
MO_TESW = MO_TE | MO_SW,
MO_TESL = MO_TE | MO_SL,
MO_TEQ = MO_TE | MO_Q,
MO_SSIZE = MO_SIZE | MO_SIGN,
} TCGMemOp;
typedef tcg_target_ulong TCGArg;
/* Define a type and accessor macros for variables. Using pointer types
is nice because it gives some level of type safely. Converting to and
from intptr_t rather than int reduces the number of sign-extension
instructions that get implied on 64-bit hosts. Users of tcg_gen_* don't
need to know about any of this, and should treat TCGv as an opaque type.
In addition we do typechecking for different types of variables. TCGv_i32
and TCGv_i64 are 32/64-bit variables respectively. TCGv and TCGv_ptr
are aliases for target_ulong and host pointer sized values respectively. */
typedef struct TCGv_i32_d *TCGv_i32;
typedef struct TCGv_i64_d *TCGv_i64;
typedef struct TCGv_ptr_d *TCGv_ptr;
static inline TCGv_i32 QEMU_ARTIFICIAL MAKE_TCGV_I32(intptr_t i)
{
return (TCGv_i32)i;
}
static inline TCGv_i64 QEMU_ARTIFICIAL MAKE_TCGV_I64(intptr_t i)
{
return (TCGv_i64)i;
}
static inline TCGv_ptr QEMU_ARTIFICIAL MAKE_TCGV_PTR(intptr_t i)
{
return (TCGv_ptr)i;
}
static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_I32(TCGv_i32 t)
{
return (intptr_t)t;
}
static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_I64(TCGv_i64 t)
{
return (intptr_t)t;
}
static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_PTR(TCGv_ptr t)
{
return (intptr_t)t;
}
#if TCG_TARGET_REG_BITS == 32
#define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
#define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
#endif
#define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
#define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
#define TCGV_EQUAL_PTR(a, b) (GET_TCGV_PTR(a) == GET_TCGV_PTR(b))
/* Dummy definition to avoid compiler warnings. */
#define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
#define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
#define TCGV_UNUSED_PTR(x) x = MAKE_TCGV_PTR(-1)
#define TCGV_IS_UNUSED_I32(x) (GET_TCGV_I32(x) == -1)
#define TCGV_IS_UNUSED_I64(x) (GET_TCGV_I64(x) == -1)
#define TCGV_IS_UNUSED_PTR(x) (GET_TCGV_PTR(x) == -1)
/* call flags */
/* Helper does not read globals (either directly or through an exception). It
implies TCG_CALL_NO_WRITE_GLOBALS. */
#define TCG_CALL_NO_READ_GLOBALS 0x0010
/* Helper does not write globals */
#define TCG_CALL_NO_WRITE_GLOBALS 0x0020
/* Helper can be safely suppressed if the return value is not used. */
#define TCG_CALL_NO_SIDE_EFFECTS 0x0040
/* convenience version of most used call flags */
#define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS
#define TCG_CALL_NO_WG TCG_CALL_NO_WRITE_GLOBALS
#define TCG_CALL_NO_SE TCG_CALL_NO_SIDE_EFFECTS
#define TCG_CALL_NO_RWG_SE (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
#define TCG_CALL_NO_WG_SE (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
/* used to align parameters */
#define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32(-1)
#define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
/* Conditions. Note that these are laid out for easy manipulation by
the functions below:
bit 0 is used for inverting;
bit 1 is signed,
bit 2 is unsigned,
bit 3 is used with bit 0 for swapping signed/unsigned. */
typedef enum {
/* non-signed */
TCG_COND_NEVER = 0 | 0 | 0 | 0,
TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
TCG_COND_EQ = 8 | 0 | 0 | 0,
TCG_COND_NE = 8 | 0 | 0 | 1,
/* signed */
TCG_COND_LT = 0 | 0 | 2 | 0,
TCG_COND_GE = 0 | 0 | 2 | 1,
TCG_COND_LE = 8 | 0 | 2 | 0,
TCG_COND_GT = 8 | 0 | 2 | 1,
/* unsigned */
TCG_COND_LTU = 0 | 4 | 0 | 0,
TCG_COND_GEU = 0 | 4 | 0 | 1,
TCG_COND_LEU = 8 | 4 | 0 | 0,
TCG_COND_GTU = 8 | 4 | 0 | 1,
} TCGCond;
/* Invert the sense of the comparison. */
static inline TCGCond tcg_invert_cond(TCGCond c)
{
return (TCGCond)(c ^ 1);
}
/* Swap the operands in a comparison. */
static inline TCGCond tcg_swap_cond(TCGCond c)
{
return c & 6 ? (TCGCond)(c ^ 9) : c;
}
/* Create an "unsigned" version of a "signed" comparison. */
static inline TCGCond tcg_unsigned_cond(TCGCond c)
{
return c & 2 ? (TCGCond)(c ^ 6) : c;
}
/* Must a comparison be considered unsigned? */
static inline bool is_unsigned_cond(TCGCond c)
{
return (c & 4) != 0;
}
/* Create a "high" version of a double-word comparison.
This removes equality from a LTE or GTE comparison. */
static inline TCGCond tcg_high_cond(TCGCond c)
{
switch (c) {
case TCG_COND_GE:
case TCG_COND_LE:
case TCG_COND_GEU:
case TCG_COND_LEU:
return (TCGCond)(c ^ 8);
default:
return c;
}
}
#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;
struct TCGTemp *mem_base;
intptr_t 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 across
basic blocks. Otherwise, it is not
preserved across basic blocks. */
unsigned int temp_allocated:1; /* never used for code gen */
const char *name;
} TCGTemp;
typedef struct TCGContext TCGContext;
typedef struct TCGTempSet {
unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)];
} TCGTempSet;
typedef struct TCGOp {
TCGOpcode opc : 8;
/* The number of out and in parameter for a call. */
unsigned callo : 2;
unsigned calli : 6;
/* Index of the arguments for this op, or -1 for zero-operand ops. */
signed args : 16;
/* Index of the prex/next op, or -1 for the end of the list. */
signed prev : 16;
signed next : 16;
} TCGOp;
QEMU_BUILD_BUG_ON(NB_OPS > 0xff);
QEMU_BUILD_BUG_ON(OPC_BUF_SIZE >= 0x7fff);
QEMU_BUILD_BUG_ON(OPPARAM_BUF_SIZE >= 0x7fff);
/* pool based memory allocation */
void *tcg_malloc_internal(TCGContext *s, int size);
void tcg_pool_reset(TCGContext *s);
void tcg_pool_delete(TCGContext *s);
void tcg_context_init(TCGContext *s);
void tcg_context_free(void *s); // free memory allocated for @s
void tcg_prologue_init(TCGContext *s);
void tcg_func_start(TCGContext *s);
int tcg_gen_code(TCGContext *s, tcg_insn_unit *gen_code_buf);
int tcg_gen_code_search_pc(TCGContext *s, tcg_insn_unit *gen_code_buf,
long offset);
void tcg_set_frame(TCGContext *s, int reg, intptr_t start, intptr_t size);
int tcg_global_mem_new_internal(TCGContext *s, TCGType type, TCGv_ptr base, intptr_t offset, const char *name);
TCGv_i32 tcg_global_reg_new_i32(TCGContext *s, int reg, const char *name);
TCGv_i64 tcg_global_reg_new_i64(TCGContext *s, int reg, const char *name);
TCGv_i32 tcg_temp_new_internal_i32(TCGContext *s, int temp_local);
TCGv_i64 tcg_temp_new_internal_i64(TCGContext *s, int temp_local);
void tcg_temp_free_i32(TCGContext *s, TCGv_i32 arg);
void tcg_temp_free_i64(TCGContext *s, TCGv_i64 arg);
char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
static inline TCGv_i32 tcg_global_mem_new_i32(TCGContext *s, TCGv_ptr reg,
intptr_t offset, const char *name)
{
int idx = tcg_global_mem_new_internal(s, TCG_TYPE_I32, reg, offset, name);
return MAKE_TCGV_I32(idx);
}
static inline TCGv_i32 tcg_temp_new_i32(TCGContext *s)
{
return tcg_temp_new_internal_i32(s, 0);
}
static inline TCGv_i32 tcg_temp_local_new_i32(TCGContext *s)
{
return tcg_temp_new_internal_i32(s, 1);
}
static inline TCGv_i64 tcg_global_mem_new_i64(TCGContext *s, TCGv_ptr reg,
intptr_t offset, const char *name)
{
int idx = tcg_global_mem_new_internal(s, TCG_TYPE_I64, reg, offset, name);
return MAKE_TCGV_I64(idx);
}
static inline TCGv_i64 tcg_temp_new_i64(TCGContext *s)
{
return tcg_temp_new_internal_i64(s, 0);
}
static inline TCGv_i64 tcg_temp_local_new_i64(TCGContext *s)
{
return tcg_temp_new_internal_i64(s, 1);
}
#if defined(CONFIG_DEBUG_TCG)
/* If you call tcg_clear_temp_count() at the start of a section of
* code which is not supposed to leak any TCG temporaries, then
* calling tcg_check_temp_count() at the end of the section will
* return 1 if the section did in fact leak a temporary.
*/
void tcg_clear_temp_count(void);
int tcg_check_temp_count(void);
#else
#define tcg_clear_temp_count() do { } while (0)
#define tcg_check_temp_count() 0
#endif
void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
#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
/* Bits for TCGOpDef->flags, 8 bits available. */
enum {
/* Instruction defines the end of a basic block. */
TCG_OPF_BB_END = 0x01,
/* Instruction clobbers call registers and potentially update globals. */
TCG_OPF_CALL_CLOBBER = 0x02,
/* Instruction has side effects: it cannot be removed if its outputs
are not used, and might trigger exceptions. */
TCG_OPF_SIDE_EFFECTS = 0x04,
/* Instruction operands are 64-bits (otherwise 32-bits). */
TCG_OPF_64BIT = 0x08,
/* Instruction is optional and not implemented by the host, or insn
is generic and should not be implemened by the host. */
TCG_OPF_NOT_PRESENT = 0x10,
};
typedef struct TCGOpDef {
const char *name;
uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
uint8_t flags;
TCGArgConstraint *args_ct;
int *sorted_args;
#if defined(CONFIG_DEBUG_TCG)
int used;
#endif
} TCGOpDef;
struct tcg_temp_info {
bool is_const;
uint16_t prev_copy;
uint16_t next_copy;
tcg_target_ulong val;
tcg_target_ulong mask;
};
struct TCGContext {
uint8_t *pool_cur, *pool_end;
TCGPool *pool_first, *pool_current, *pool_first_large;
int nb_labels;
int nb_globals;
int nb_temps;
/* goto_tb support */
tcg_insn_unit *code_buf;
uintptr_t *tb_next;
uint16_t *tb_next_offset;
uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
/* liveness analysis */
uint16_t *op_dead_args; /* for each operation, each bit tells if the
corresponding argument is dead */
uint8_t *op_sync_args; /* for each operation, each bit tells if the
corresponding output argument needs to be
sync to memory. */
TCGRegSet reserved_regs;
intptr_t current_frame_offset;
intptr_t frame_start;
intptr_t frame_end;
TCGTemp *frame_temp;
tcg_insn_unit *code_ptr;
GHashTable *helpers;
#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 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 opt_time;
int64_t restore_count;
int64_t restore_time;
#endif
#ifdef CONFIG_DEBUG_TCG
int temps_in_use;
int goto_tb_issue_mask;
#endif
int gen_first_op_idx;
int gen_last_op_idx;
int gen_next_op_idx;
int gen_next_parm_idx;
/* Code generation. Note that we specifically do not use tcg_insn_unit
here, because there's too much arithmetic throughout that relies
on addition and subtraction working on bytes. Rely on the GCC
extension that allows arithmetic on void*. */
int code_gen_max_blocks;
void *code_gen_prologue;
void *code_gen_buffer;
size_t code_gen_buffer_size;
/* threshold to flush the translated code buffer */
size_t code_gen_buffer_max_size;
void *code_gen_ptr;
TBContext tb_ctx;
/* The TCGBackendData structure is private to tcg-target.c. */
struct TCGBackendData *be;
TCGTempSet free_temps[TCG_TYPE_COUNT * 2];
TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
/* tells in which temporary a given register is. It does not take
into account fixed registers */
int reg_to_temp[TCG_TARGET_NB_REGS];
TCGOp gen_op_buf[OPC_BUF_SIZE];
TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
target_ulong gen_opc_pc[OPC_BUF_SIZE];
uint16_t gen_opc_icount[OPC_BUF_SIZE];
uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
// Unicorn engine variables
struct uc_struct *uc;
/* qemu/target-i386/translate.c: global register indexes */
TCGv_ptr cpu_env;
TCGv_i32 cpu_cc_op;
void *cpu_regs[16]; // 16 GRP for X86-64
int x86_64_hregs; // qemu/target-i386/translate.c
uint8_t gen_opc_cc_op[OPC_BUF_SIZE]; // qemu/target-i386/translate.c
/* qemu/target-i386/translate.c: global TCGv vars */
void *cpu_A0;
void *cpu_cc_dst, *cpu_cc_src, *cpu_cc_src2, *cpu_cc_srcT;
/* qemu/target-i386/translate.c: local temps */
void *cpu_T[2];
/* qemu/target-i386/translate.c: local register indexes (only used inside old micro ops) */
void *cpu_tmp0, *cpu_tmp4;
TCGv_ptr cpu_ptr0, cpu_ptr1;
TCGv_i32 cpu_tmp2_i32, cpu_tmp3_i32;
TCGv_i64 cpu_tmp1_i64;
/* qemu/tcg/i386/tcg-target.c */
void *tb_ret_addr;
int guest_base_flags;
/* If bit_MOVBE is defined in cpuid.h (added in GCC version 4.6), we are
going to attempt to determine at runtime whether movbe is available. */
bool have_movbe;
/* qemu/tcg/tcg.c */
uint64_t tcg_target_call_clobber_regs;
uint64_t tcg_target_available_regs[2];
TCGOpDef *tcg_op_defs;
/* qemu/tcg/optimize.c */
struct tcg_temp_info temps2[TCG_MAX_TEMPS];
TCGTempSet temps2_used;
/* qemu/target-m68k/translate.c */
TCGv_i32 cpu_halted;
char cpu_reg_names[3*8*3 + 5*4];
void *cpu_dregs[8];
void *cpu_aregs[8];
TCGv_i64 cpu_fregs[8];
TCGv_i64 cpu_macc[4];
TCGv_i64 QREG_FP_RESULT;
void *QREG_PC, *QREG_SR, *QREG_CC_OP, *QREG_CC_DEST, *QREG_CC_SRC;
void *QREG_CC_X, *QREG_DIV1, *QREG_DIV2, *QREG_MACSR, *QREG_MAC_MASK;
void *NULL_QREG;
void *opcode_table[65536];
/* Used to distinguish stores from bad addressing modes. */
void *store_dummy;
/* qemu/target-arm/translate.c */
uint32_t gen_opc_condexec_bits[OPC_BUF_SIZE];
TCGv_i64 cpu_V0, cpu_V1, cpu_M0;
/* We reuse the same 64-bit temporaries for efficiency. */
TCGv_i32 cpu_R[16];
TCGv_i32 cpu_CF, cpu_NF, cpu_VF, cpu_ZF;
TCGv_i64 cpu_exclusive_addr;
TCGv_i64 cpu_exclusive_val;
TCGv_i32 cpu_F0s, cpu_F1s;
TCGv_i64 cpu_F0d, cpu_F1d;
/* qemu/target-arm/translate-a64.c */
TCGv_i64 cpu_pc;
/* Load/store exclusive handling */
TCGv_i64 cpu_exclusive_high;
TCGv_i64 cpu_X[32];
/* qemu/target-mips/translate.c */
/* global register indices */
void *cpu_gpr[32], *cpu_PC;
void *cpu_HI[4], *cpu_LO[4]; // MIPS_DSP_ACC = 4 in qemu/target-mips/cpu.h
void *cpu_dspctrl, *btarget, *bcond;
TCGv_i32 hflags;
TCGv_i32 fpu_fcr31;
TCGv_i64 fpu_f64[32];
TCGv_i64 msa_wr_d[64];
uint32_t gen_opc_hflags[OPC_BUF_SIZE];
target_ulong gen_opc_btarget[OPC_BUF_SIZE];
/* qemu/target-sparc/translate.c */
/* global register indexes */
TCGv_ptr cpu_regwptr;
TCGv_i32 cpu_psr;
TCGv_i32 cpu_xcc, cpu_asi, cpu_fprs;
TCGv_i32 cpu_softint;
/* Floating point registers */
TCGv_i64 cpu_fpr[32]; // TARGET_DPREGS = 32 for Sparc64, 16 for Sparc
target_ulong gen_opc_npc[OPC_BUF_SIZE];
target_ulong gen_opc_jump_pc[2];
// void *cpu_cc_src, *cpu_cc_src2, *cpu_cc_dst;
void *cpu_fsr, *sparc_cpu_pc, *cpu_npc, *cpu_gregs[8];
void *cpu_y;
void *cpu_tbr;
void *cpu_cond;
void *cpu_gsr;
void *cpu_tick_cmpr, *cpu_stick_cmpr, *cpu_hstick_cmpr;
void *cpu_hintp, *cpu_htba, *cpu_hver, *cpu_ssr, *cpu_ver;
void *cpu_wim;
TCGLabel *exitreq_label; // gen_tb_start()
};
/* The number of opcodes emitted so far. */
static inline int tcg_op_buf_count(TCGContext *tcg_ctx)
{
return tcg_ctx->gen_next_op_idx;
}
/* Test for whether to terminate the TB for using too many opcodes. */
static inline bool tcg_op_buf_full(TCGContext *tcg_ctx)
{
return tcg_op_buf_count(tcg_ctx) >= OPC_MAX_SIZE;
}
typedef struct TCGTargetOpDef {
TCGOpcode op;
const char *args_ct_str[TCG_MAX_OP_ARGS];
} TCGTargetOpDef;
#define tcg_abort() \
do {\
fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
abort();\
} while (0)
#ifdef CONFIG_DEBUG_TCG
# define tcg_debug_assert(X) do { assert(X); } while (0)
#elif QEMU_GNUC_PREREQ(4, 5)
# define tcg_debug_assert(X) \
do { if (!(X)) { __builtin_unreachable(); } } while (0)
#else
# define tcg_debug_assert(X) do { (void)(X); } while (0)
#endif
void tcg_add_target_add_op_defs(TCGContext *s, const TCGTargetOpDef *tdefs);
#if UINTPTR_MAX == UINT32_MAX
#define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
#define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
#define tcg_const_ptr(t, V) TCGV_NAT_TO_PTR(tcg_const_i32(t, (intptr_t)(V)))
#define tcg_global_reg_new_ptr(U, R, N) \
TCGV_NAT_TO_PTR(tcg_global_reg_new_i32(U, (R), (N)))
#define tcg_global_mem_new_ptr(t, R, O, N) \
TCGV_NAT_TO_PTR(tcg_global_mem_new_i32(t, (R), (O), (N)))
#define tcg_temp_new_ptr(s) TCGV_NAT_TO_PTR(tcg_temp_new_i32(s))
#define tcg_temp_free_ptr(s, T) tcg_temp_free_i32(s, TCGV_PTR_TO_NAT(T))
#else
#define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
#define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
#define tcg_const_ptr(t, V) TCGV_NAT_TO_PTR(tcg_const_i64(t, (intptr_t)(V)))
#define tcg_global_reg_new_ptr(U, R, N) \
TCGV_NAT_TO_PTR(tcg_global_reg_new_i64(U, (R), (N)))
#define tcg_global_mem_new_ptr(t, R, O, N) \
TCGV_NAT_TO_PTR(tcg_global_mem_new_i64(t, (R), (O), (N)))
#define tcg_temp_new_ptr(s) TCGV_NAT_TO_PTR(tcg_temp_new_i64(s))
#define tcg_temp_free_ptr(s, T) tcg_temp_free_i64(s, TCGV_PTR_TO_NAT(T))
#endif
void tcg_gen_callN(TCGContext *s, void *func,
TCGArg ret, int nargs, TCGArg *args);
void tcg_op_remove(TCGContext *s, TCGOp *op);
void tcg_optimize(TCGContext *s);
static inline void *tcg_malloc(TCGContext *s, int size)
{
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(s, size);
} else {
s->pool_cur = ptr_end;
return ptr;
}
}
/* only used for debugging purposes */
void tcg_dump_ops(TCGContext *s);
void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
TCGv_i32 tcg_const_i32(TCGContext *s, int32_t val);
TCGv_i64 tcg_const_i64(TCGContext *s, int64_t val);
TCGv_i32 tcg_const_local_i32(TCGContext *s, int32_t val);
TCGv_i64 tcg_const_local_i64(TCGContext *s, int64_t val);
TCGLabel *gen_new_label(TCGContext* s);
/**
* label_arg
* @l: label
*
* Encode a label for storage in the TCG opcode stream.
*/
static inline TCGArg label_arg(TCGContext *tcg_ctx, TCGLabel *l)
{
return (uintptr_t)l;
}
/**
* arg_label
* @i: value
*
* The opposite of label_arg. Retrieve a label from the
* encoding of the TCG opcode stream.
*/
static inline TCGLabel *arg_label(TCGContext *tcg_ctx, TCGArg i)
{
return (TCGLabel *)(uintptr_t)i;
}
/**
* tcg_ptr_byte_diff
* @a, @b: addresses to be differenced
*
* There are many places within the TCG backends where we need a byte
* difference between two pointers. While this can be accomplished
* with local casting, it's easy to get wrong -- especially if one is
* concerned with the signedness of the result.
*
* This version relies on GCC's void pointer arithmetic to get the
* correct result.
*/
static inline ptrdiff_t tcg_ptr_byte_diff(void *a, void *b)
{
return (char*)a - (char*)b;
}
/**
* tcg_pcrel_diff
* @s: the tcg context
* @target: address of the target
*
* Produce a pc-relative difference, from the current code_ptr
* to the destination address.
*/
static inline ptrdiff_t tcg_pcrel_diff(TCGContext *s, void *target)
{
return tcg_ptr_byte_diff(target, s->code_ptr);
}
/**
* tcg_current_code_size
* @s: the tcg context
*
* Compute the current code size within the translation block.
* This is used to fill in qemu's data structures for goto_tb.
*/
static inline size_t tcg_current_code_size(TCGContext *s)
{
return tcg_ptr_byte_diff(s->code_ptr, s->code_buf);
}
/* Combine the TCGMemOp and mmu_idx parameters into a single value. */
typedef uint32_t TCGMemOpIdx;
/**
* make_memop_idx
* @op: memory operation
* @idx: mmu index
*
* Encode these values into a single parameter.
*/
static inline TCGMemOpIdx make_memop_idx(TCGMemOp op, unsigned idx)
{
tcg_debug_assert(idx <= 15);
return (op << 4) | idx;
}
/**
* get_memop
* @oi: combined op/idx parameter
*
* Extract the memory operation from the combined value.
*/
static inline TCGMemOp get_memop(TCGMemOpIdx oi)
{
return oi >> 4;
}
/**
* get_mmuidx
* @oi: combined op/idx parameter
*
* Extract the mmu index from the combined value.
*/
static inline unsigned get_mmuidx(TCGMemOpIdx oi)
{
return oi & 15;
}
/**
* tcg_qemu_tb_exec:
* @env: CPUArchState * for the CPU
* @tb_ptr: address of generated code for the TB to execute
*
* Start executing code from a given translation block.
* Where translation blocks have been linked, execution
* may proceed from the given TB into successive ones.
* Control eventually returns only when some action is needed
* from the top-level loop: either control must pass to a TB
* which has not yet been directly linked, or an asynchronous
* event such as an interrupt needs handling.
*
* The return value is a pointer to the next TB to execute
* (if known; otherwise zero). This pointer is assumed to be
* 4-aligned, and the bottom two bits are used to return further
* information:
* 0, 1: the link between this TB and the next is via the specified
* TB index (0 or 1). That is, we left the TB via (the equivalent
* of) "goto_tb <index>". The main loop uses this to determine
* how to link the TB just executed to the next.
* 2: we are using instruction counting code generation, and we
* did not start executing this TB because the instruction counter
* would hit zero midway through it. In this case the next-TB pointer
* returned is the TB we were about to execute, and the caller must
* arrange to execute the remaining count of instructions.
* 3: we stopped because the CPU's exit_request flag was set
* (usually meaning that there is an interrupt that needs to be
* handled). The next-TB pointer returned is the TB we were
* about to execute when we noticed the pending exit request.
*
* If the bottom two bits indicate an exit-via-index then the CPU
* state is correctly synchronised and ready for execution of the next
* TB (and in particular the guest PC is the address to execute next).
* Otherwise, we gave up on execution of this TB before it started, and
* the caller must fix up the CPU state by calling the CPU's
* synchronize_from_tb() method with the next-TB pointer we return (falling
* back to calling the CPU's set_pc method with tb->pb if no
* synchronize_from_tb() method exists).
*
* Note that TCG targets may use a different definition of tcg_qemu_tb_exec
* to this default (which just calls the prologue.code emitted by
* tcg_target_qemu_prologue()).
*/
#define TB_EXIT_MASK 3
#define TB_EXIT_IDX0 0
#define TB_EXIT_IDX1 1
#define TB_EXIT_ICOUNT_EXPIRED 2
#define TB_EXIT_REQUESTED 3
#if !defined(tcg_qemu_tb_exec)
# define tcg_qemu_tb_exec(env, tb_ptr) \
((uintptr_t (*)(void *, void *))tcg_ctx->code_gen_prologue)(env, tb_ptr)
#endif
/*
* Memory helpers that will be used by TCG generated code.
*/
#ifdef CONFIG_SOFTMMU
/* Value zero-extended to tcg register size. */
tcg_target_ulong helper_ret_ldub_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
tcg_target_ulong helper_le_lduw_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
tcg_target_ulong helper_le_ldul_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
uint64_t helper_le_ldq_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
tcg_target_ulong helper_be_lduw_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
tcg_target_ulong helper_be_ldul_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
uint64_t helper_be_ldq_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
/* Value sign-extended to tcg register size. */
tcg_target_ulong helper_ret_ldsb_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
tcg_target_ulong helper_le_ldsw_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
tcg_target_ulong helper_le_ldsl_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
tcg_target_ulong helper_be_ldsw_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
tcg_target_ulong helper_be_ldsl_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
void helper_ret_stb_mmu(CPUArchState *env, target_ulong addr, uint8_t val,
TCGMemOpIdx oi, uintptr_t retaddr);
void helper_le_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
TCGMemOpIdx oi, uintptr_t retaddr);
void helper_le_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
TCGMemOpIdx oi, uintptr_t retaddr);
void helper_le_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
TCGMemOpIdx oi, uintptr_t retaddr);
void helper_be_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
TCGMemOpIdx oi, uintptr_t retaddr);
void helper_be_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
TCGMemOpIdx oi, uintptr_t retaddr);
void helper_be_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
TCGMemOpIdx oi, uintptr_t retaddr);
/* Temporary aliases until backends are converted. */
#ifdef TARGET_WORDS_BIGENDIAN
# define helper_ret_ldsw_mmu helper_be_ldsw_mmu
# define helper_ret_lduw_mmu helper_be_lduw_mmu
# define helper_ret_ldsl_mmu helper_be_ldsl_mmu
# define helper_ret_ldul_mmu helper_be_ldul_mmu
# define helper_ret_ldq_mmu helper_be_ldq_mmu
# define helper_ret_stw_mmu helper_be_stw_mmu
# define helper_ret_stl_mmu helper_be_stl_mmu
# define helper_ret_stq_mmu helper_be_stq_mmu
#else
# define helper_ret_ldsw_mmu helper_le_ldsw_mmu
# define helper_ret_lduw_mmu helper_le_lduw_mmu
# define helper_ret_ldsl_mmu helper_le_ldsl_mmu
# define helper_ret_ldul_mmu helper_le_ldul_mmu
# define helper_ret_ldq_mmu helper_le_ldq_mmu
# define helper_ret_stw_mmu helper_le_stw_mmu
# define helper_ret_stl_mmu helper_le_stl_mmu
# define helper_ret_stq_mmu helper_le_stq_mmu
#endif
#endif /* CONFIG_SOFTMMU */
#endif /* TCG_H */
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