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unicorn/qemu/tcg/tcg.h
Richard Henderson e0266239ea
tcg: Add opcodes for vector saturated arithmetic 
Backports commit 8afaf0506606f8003ef696df849c5a98637a7a83 from qemu
2019-01-29 16:14:34 -05:00

1592 lines
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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 "cpu.h"
#include "exec/tb-context.h"
#include "qemu/bitops.h"
#include "qemu/queue.h"
#include "tcg-mo.h"
#include "tcg-target.h"
#include "qemu/int128.h"
#include "exec/exec-all.h"
#include "uc_priv.h"
/* XXX: make safe guess about sizes */
#define MAX_OP_PER_INSTR 266
#if HOST_LONG_BITS == 32
#define MAX_OPC_PARAM_PER_ARG 2
#else
#define MAX_OPC_PARAM_PER_ARG 1
#endif
#define MAX_OPC_PARAM_IARGS 6
#define MAX_OPC_PARAM_OARGS 1
#define MAX_OPC_PARAM_ARGS (MAX_OPC_PARAM_IARGS + MAX_OPC_PARAM_OARGS)
/* A Call op needs up to 4 + 2N parameters on 32-bit archs,
* and up to 4 + N parameters on 64-bit archs
* (N = number of input arguments + output arguments). */
#define MAX_OPC_PARAM (4 + (MAX_OPC_PARAM_PER_ARG * MAX_OPC_PARAM_ARGS))
#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
/* Oversized TCG guests make things like MTTCG hard
* as we can't use atomics for cputlb updates.
*/
#if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
#define TCG_OVERSIZED_GUEST 1
#else
#define TCG_OVERSIZED_GUEST 0
#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_clz_i64 0
#define TCG_TARGET_HAS_ctz_i64 0
#define TCG_TARGET_HAS_ctpop_i64 0
#define TCG_TARGET_HAS_deposit_i64 0
#define TCG_TARGET_HAS_extract_i64 0
#define TCG_TARGET_HAS_sextract_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
#ifndef TCG_TARGET_extract_i32_valid
#define TCG_TARGET_extract_i32_valid(ofs, len) 1
#endif
#ifndef TCG_TARGET_extract_i64_valid
#define TCG_TARGET_extract_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
#if !defined(TCG_TARGET_HAS_v64) \
&& !defined(TCG_TARGET_HAS_v128) \
&& !defined(TCG_TARGET_HAS_v256)
#define TCG_TARGET_MAYBE_vec 0
#define TCG_TARGET_HAS_neg_vec 0
#define TCG_TARGET_HAS_not_vec 0
#define TCG_TARGET_HAS_andc_vec 0
#define TCG_TARGET_HAS_orc_vec 0
#define TCG_TARGET_HAS_shi_vec 0
#define TCG_TARGET_HAS_shs_vec 0
#define TCG_TARGET_HAS_shv_vec 0
#define TCG_TARGET_HAS_mul_vec 0
#define TCG_TARGET_HAS_sat_vec 0
#else
#define TCG_TARGET_MAYBE_vec 1
#endif
#ifndef TCG_TARGET_HAS_v64
#define TCG_TARGET_HAS_v64 0
#endif
#ifndef TCG_TARGET_HAS_v128
#define TCG_TARGET_HAS_v128 0
#endif
#ifndef TCG_TARGET_HAS_v256
#define TCG_TARGET_HAS_v256 0
#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_set_reg(d, r) ((d) |= (TCGRegSet)1 << (r))
#define tcg_regset_reset_reg(d, r) ((d) &= ~((TCGRegSet)1 << (r)))
#define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
#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
#if defined CONFIG_DEBUG_TCG || defined QEMU_STATIC_ANALYSIS
# define tcg_debug_assert(X) do { assert(X); } while (0)
#else
# if 0 /* UNICORN: Enabling this causes assertions. Need to track these down. */
# define tcg_debug_assert(X) \
do { if (!(X)) { __builtin_unreachable(); } } while (0)
# else
# define tcg_debug_assert(X) do { (void)(X); } while (0)
# endif
#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 : 15;
unsigned refs : 16;
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_ALIGNED(8, data[0]);
} TCGPool;
#define TCG_POOL_CHUNK_SIZE 32768
#define TCG_MAX_TEMPS 512
#define TCG_MAX_INSNS 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_V64,
TCG_TYPE_V128,
TCG_TYPE_V256,
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.
*
* Some architectures (e.g. ARMv8) need the address which is aligned
* to a size more than the size of the memory access.
* Some architectures (e.g. SPARCv9) need an address which is aligned,
* but less strictly than the natural alignment.
*
* MO_ALIGN supposes the alignment size is the size of a memory access.
*
* than an access size.
* There are three options:
* - an alignment to the size of an access (MO_ALIGN);
* - an alignment to a specified size, which may be more or less than
* the access size (MO_ALIGN_x where 'x' is a size in bytes);
* - unaligned access permitted (MO_UNALN).
*/
MO_ASHIFT = 4,
MO_AMASK = 7 << MO_ASHIFT,
#ifdef ALIGNED_ONLY
MO_ALIGN = 0,
MO_UNALN = MO_AMASK,
#else
MO_ALIGN = MO_AMASK,
MO_UNALN = 0,
#endif
MO_ALIGN_2 = 1 << MO_ASHIFT,
MO_ALIGN_4 = 2 << MO_ASHIFT,
MO_ALIGN_8 = 3 << MO_ASHIFT,
MO_ALIGN_16 = 4 << MO_ASHIFT,
MO_ALIGN_32 = 5 << MO_ASHIFT,
MO_ALIGN_64 = 6 << MO_ASHIFT,
/* 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;
/**
* get_alignment_bits
* @memop: TCGMemOp value
*
* Extract the alignment size from the memop.
*/
static inline unsigned get_alignment_bits(TCGMemOp memop)
{
unsigned a = memop & MO_AMASK;
if (a == MO_UNALN) {
/* No alignment required. */
a = 0;
} else if (a == MO_ALIGN) {
/* A natural alignment requirement. */
a = memop & MO_SIZE;
} else {
/* A specific alignment requirement. */
a = a >> MO_ASHIFT;
}
#if defined(CONFIG_SOFTMMU)
/* The requested alignment cannot overlap the TLB flags. */
tcg_debug_assert((TLB_FLAGS_MASK & ((1 << a) - 1)) == 0);
#endif
return a;
}
typedef tcg_target_ulong TCGArg;
/* Define type and accessor macros for TCG variables.
TCG variables are the inputs and outputs of TCG ops, as described
in tcg/README. Target CPU front-end code uses these types to deal
with TCG variables as it emits TCG code via the tcg_gen_* functions.
They come in several flavours:
* TCGv_i32 : 32 bit integer type
* TCGv_i64 : 64 bit integer type
* TCGv_ptr : a host pointer type
* TCGv_vec : a host vector type; the exact size is not exposed
to the CPU front-end code.
* TCGv : an integer type the same size as target_ulong
(an alias for either TCGv_i32 or TCGv_i64)
The compiler's type checking will complain if you mix them
up and pass the wrong sized TCGv to a function.
Users of tcg_gen_* don't need to know about any of the internal
details of these, and should treat them as opaque types.
You won't be able to look inside them in a debugger either.
Internal implementation details follow:
Note that there is no definition of the structs TCGv_i32_d etc anywhere.
This is deliberate, because the values we store in variables of type
TCGv_i32 are not really pointers-to-structures. They're just small
integers, but keeping them in pointer types like this means that the
compiler will complain if you accidentally pass a TCGv_i32 to a
function which takes a TCGv_i64, and so on. Only the internals of
TCG need to care about the actual contents of the types. */
typedef struct TCGv_i32_d *TCGv_i32;
typedef struct TCGv_i64_d *TCGv_i64;
typedef struct TCGv_ptr_d *TCGv_ptr;
typedef struct TCGv_vec_d *TCGv_vec;
typedef TCGv_ptr TCGv_env;
#if TARGET_LONG_BITS == 32
#define TCGv TCGv_i32
#elif TARGET_LONG_BITS == 64
#define TCGv TCGv_i64
#else
#error Unhandled TARGET_LONG_BITS value
#endif
/* 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 0x0001
/* Helper does not write globals */
#define TCG_CALL_NO_WRITE_GLOBALS 0x0002
/* Helper can be safely suppressed if the return value is not used. */
#define TCG_CALL_NO_SIDE_EFFECTS 0x0004
/* Helper is QEMU_NORETURN. */
#define TCG_CALL_NO_RETURN 0x0008
/* 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. See the comment before tcgv_i32_temp. */
#define TCG_CALL_DUMMY_ARG ((TCGArg)0)
/* 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;
}
/* Create a "signed" version of an "unsigned" comparison. */
static inline TCGCond tcg_signed_cond(TCGCond c)
{
return c & 4 ? (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;
}
}
typedef enum TCGTempVal {
TEMP_VAL_DEAD,
TEMP_VAL_REG,
TEMP_VAL_MEM,
TEMP_VAL_CONST,
} TCGTempVal;
typedef struct TCGTemp {
TCGReg reg:8;
TCGTempVal val_type:8;
TCGType base_type:8;
TCGType type:8;
unsigned int fixed_reg:1;
unsigned int indirect_reg:1;
unsigned int indirect_base:1;
unsigned int mem_coherent:1;
unsigned int mem_allocated:1;
/* If true, the temp is saved across both basic blocks and
translation blocks. */
unsigned int temp_global:1;
/* If true, the temp is saved across basic blocks but dead
at the end of translation blocks. If false, the temp is
dead at the end of basic blocks. */
unsigned int temp_local:1;
unsigned int temp_allocated:1;
tcg_target_long val;
intptr_t mem_offset;
struct TCGTemp *mem_base;
const char *name;
/* Pass-specific information that can be stored for a temporary.
One word worth of integer data, and one pointer to data
allocated separately. */
uintptr_t state;
void *state_ptr;
} TCGTemp;
typedef struct TCGContext TCGContext;
typedef struct TCGTempSet {
unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)];
} TCGTempSet;
/* While we limit helpers to 6 arguments, for 32-bit hosts, with padding,
this imples a max of 6*2 (64-bit in) + 2 (64-bit out) = 14 operands.
There are never more than 2 outputs, which means that we can store all
dead + sync data within 16 bits. */
#define DEAD_ARG 4
#define SYNC_ARG 1
typedef uint16_t TCGLifeData;
/* The layout here is designed to avoid a bitfield crossing of
a 32-bit boundary, which would cause GCC to add extra padding. */
typedef struct TCGOp {
TCGOpcode opc : 8; /* 8 */
/* The number of out and in parameter for a call. */
/* Parameters for this opcode. See below. */
unsigned param1 : 4; /* 12 */
unsigned param2 : 4; /* 16 */
/* Lifetime data of the operands. */
unsigned life : 16; /* 32 */
/* Next and previous opcodes. */
QTAILQ_ENTRY(TCGOp) link;
/* Arguments for the opcode. */
TCGArg args[MAX_OPC_PARAM];
/* Register preferences for the output(s). */
TCGRegSet output_pref[2];
} TCGOp;
#define TCGOP_CALLI(X) (X)->param1
#define TCGOP_CALLO(X) (X)->param2
#define TCGOP_VECL(X) (X)->param1
#define TCGOP_VECE(X) (X)->param2
/* Make sure operands fit in the bitfields above. */
QEMU_BUILD_BUG_ON(NB_OPS > (1 << 8));
/* pool based memory allocation */
/* tb_lock must be held for tcg_malloc_internal. */
void *tcg_malloc_internal(TCGContext *s, int size);
void tcg_pool_reset(TCGContext *s);
TranslationBlock *tcg_tb_alloc(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, TranslationBlock *tb);
void tcg_set_frame(TCGContext *s, TCGReg reg, intptr_t start, intptr_t size);
#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_NEWREG 0x20 /* output requires a new register */
#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 exits the translation block. */
TCG_OPF_BB_EXIT = 0x01,
/* Instruction defines the end of a basic block. */
TCG_OPF_BB_END = 0x02,
/* Instruction clobbers call registers and potentially update globals. */
TCG_OPF_CALL_CLOBBER = 0x04,
/* Instruction has side effects: it cannot be removed if its outputs
are not used, and might trigger exceptions. */
TCG_OPF_SIDE_EFFECTS = 0x08,
/* Instruction operands are 64-bits (otherwise 32-bits). */
TCG_OPF_64BIT = 0x10,
/* 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 = 0x20,
/* Instruction operands are vectors. */
TCG_OPF_VECTOR = 0x40,
};
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;
TCGTemp *prev_copy;
TCGTemp *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;
int nb_indirects;
int nb_ops;
/* goto_tb support */
tcg_insn_unit *code_buf;
uint16_t *tb_jmp_reset_offset; /* tb->jmp_reset_offset */
uintptr_t *tb_jmp_insn_offset; /* tb->jmp_target_arg if direct_jump */
uintptr_t *tb_jmp_target_addr; /* tb->jmp_target_arg if !direct_jump */
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 */
int temp_count_max;
int64_t temp_count;
int64_t del_op_count;
int64_t code_in_len;
int64_t code_out_len;
int64_t search_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
/* 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*. */
void *code_gen_prologue;
void *code_gen_epilogue;
void *code_gen_buffer;
size_t code_gen_buffer_size;
void *code_gen_ptr;
void *data_gen_ptr;
/* Threshold to flush the translated code buffer. */
void *code_gen_highwater;
TBContext tb_ctx;
/* Track which vCPU triggers events */
CPUState *cpu; /* *_trans */
TCGv_env tcg_env; /* *_exec */
/* These structures are private to tcg-target.inc.c. */
#ifdef TCG_TARGET_NEED_LDST_LABELS
QSIMPLEQ_HEAD(ldst_labels, TCGLabelQemuLdst) ldst_labels;
#endif
#ifdef TCG_TARGET_NEED_POOL_LABELS
struct TCGLabelPoolData *pool_labels;
#endif
TCGTempSet free_temps[TCG_TYPE_COUNT * 2];
TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
QTAILQ_HEAD(TCGOpHead, TCGOp) ops, free_ops;
/* Tells which temporary holds a given register.
It does not take into account fixed registers */
TCGTemp *reg_to_temp[TCG_TARGET_NB_REGS];
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];
uint16_t gen_insn_end_off[TCG_MAX_INSNS];
target_ulong gen_insn_data[TCG_MAX_INSNS][TARGET_INSN_START_WORDS];
// Unicorn engine variables
struct uc_struct *uc;
/* qemu/target-i386/translate.c: global register indexes */
TCGv_env cpu_env;
TCGv_i32 cpu_cc_op;
TCGv cpu_regs[16]; // 16 GRP for X86-64
TCGv cpu_seg_base[6];
TCGv_i64 cpu_bndl[4];
TCGv_i64 cpu_bndu[4];
/* qemu/target-i386/translate.c: global TCGv vars */
TCGv cpu_cc_dst;
TCGv cpu_cc_src;
TCGv cpu_cc_src2;
/* 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[TCG_TYPE_COUNT];
// Unicorn: Use a large array size to get around needing a file static
// Initially was using: ARRAY_SIZE(tcg_target_reg_alloc_order) as the size
int indirect_reg_alloc_order[50];
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[2 * 8 * 3 + 5 * 4];
TCGv cpu_dregs[8];
TCGv cpu_aregs[8];
TCGv_i64 cpu_macc[4];
TCGv QREG_PC;
TCGv QREG_SR;
TCGv QREG_CC_OP;
TCGv QREG_CC_X;
TCGv QREG_CC_C;
TCGv QREG_CC_N;
TCGv QREG_CC_V;
TCGv QREG_CC_Z;
TCGv QREG_MACSR;
TCGv QREG_MAC_MASK;
TCGv NULL_QREG;
void *opcode_table[65536];
/* Used to distinguish stores from bad addressing modes. */
TCGv store_dummy;
/* qemu/target-arm/translate.c */
/* 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;
/* 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 */
TCGv cpu_gpr[32];
TCGv cpu_PC;
TCGv cpu_HI[4], cpu_LO[4]; // MIPS_DSP_ACC = 4 in qemu/target-mips/cpu.h
TCGv cpu_dspctrl;
TCGv btarget;
TCGv bcond;
TCGv_i32 hflags;
TCGv_i32 fpu_fcr31;
TCGv_i64 fpu_f64[32];
TCGv_i64 msa_wr_d[64];
TCGv mxu_gpr[16 - 1]; // NUMBER_OF_MXU_REGISTERS - 1
TCGv mxu_CR;
/* Upper halves of R5900's 128-bit registers: MMRs (multimedia registers) */
TCGv_i64 cpu_mmr[32];
/* qemu/target-sparc/translate.c */
/* global register indexes */
TCGv_ptr cpu_regwptr;
TCGv_i32 cpu_psr;
TCGv_i32 cpu_xcc, cpu_fprs;
/* Floating point registers */
TCGv_i64 cpu_fpr[32]; // TARGET_DPREGS = 32 for Sparc64, 16 for Sparc
TCGv cpu_fsr;
TCGv sparc_cpu_pc;
TCGv cpu_npc;
TCGv cpu_regs_sparc[32];
TCGv cpu_y;
TCGv cpu_tbr;
TCGv cpu_cond;
TCGv cpu_gsr;
TCGv cpu_tick_cmpr;
TCGv cpu_stick_cmpr;
TCGv cpu_hstick_cmpr;
TCGv cpu_hintp;
TCGv cpu_htba;
TCGv cpu_hver;
TCGv cpu_ssr;
TCGv cpu_ver;
TCGv cpu_wim;
TCGLabel *exitreq_label; // gen_tb_start()
};
static inline size_t temp_idx(TCGContext *tcg_ctx, TCGTemp *ts)
{
ptrdiff_t n = ts - tcg_ctx->temps;
tcg_debug_assert(n >= 0 && n < tcg_ctx->nb_temps);
return n;
}
static inline TCGArg temp_arg(TCGTemp *ts)
{
return (uintptr_t)ts;
}
static inline TCGTemp *arg_temp(TCGArg a)
{
return (TCGTemp *)(uintptr_t)a;
}
/* Using the offset of a temporary, relative to TCGContext, rather than
its index means that we don't use 0. That leaves offset 0 free for
a NULL representation without having to leave index 0 unused. */
static inline TCGTemp *tcgv_i32_temp(TCGContext *s, TCGv_i32 v)
{
uintptr_t o = (uintptr_t)v;
TCGTemp *t = (void *)s + o;
tcg_debug_assert(offsetof(TCGContext, temps[temp_idx(s, t)]) == o);
return t;
}
static inline TCGTemp *tcgv_i64_temp(TCGContext *s, TCGv_i64 v)
{
return tcgv_i32_temp(s, (TCGv_i32)v);
}
static inline TCGTemp *tcgv_ptr_temp(TCGContext *s, TCGv_ptr v)
{
return tcgv_i32_temp(s, (TCGv_i32)v);
}
static inline TCGTemp *tcgv_vec_temp(TCGContext *s, TCGv_vec v)
{
return tcgv_i32_temp(s, (TCGv_i32)v);
}
static inline TCGArg tcgv_i32_arg(TCGContext *s, TCGv_i32 v)
{
return temp_arg(tcgv_i32_temp(s, v));
}
static inline TCGArg tcgv_i64_arg(TCGContext *s, TCGv_i64 v)
{
return temp_arg(tcgv_i64_temp(s, v));
}
static inline TCGArg tcgv_ptr_arg(TCGContext *s, TCGv_ptr v)
{
return temp_arg(tcgv_ptr_temp(s, v));
}
static inline TCGArg tcgv_vec_arg(TCGContext *s, TCGv_vec v)
{
return temp_arg(tcgv_vec_temp(s, v));
}
static inline TCGv_i32 temp_tcgv_i32(TCGContext *s, TCGTemp *t)
{
(void)temp_idx(s, t); /* trigger embedded assert */
return (TCGv_i32)((void *)t - (void *)s);
}
static inline TCGv_i64 temp_tcgv_i64(TCGContext *s, TCGTemp *t)
{
return (TCGv_i64)temp_tcgv_i32(s, t);
}
static inline TCGv_ptr temp_tcgv_ptr(TCGContext *s, TCGTemp *t)
{
return (TCGv_ptr)temp_tcgv_i32(s, t);
}
static inline TCGv_vec temp_tcgv_vec(TCGContext *s, TCGTemp *t)
{
return (TCGv_vec)temp_tcgv_i32(s, t);
}
#if TCG_TARGET_REG_BITS == 32
static inline TCGv_i32 TCGV_LOW(TCGContext *s, TCGv_i64 t)
{
return temp_tcgv_i32(s, tcgv_i64_temp(s, t));
}
static inline TCGv_i32 TCGV_HIGH(TCGContext *s, TCGv_i64 t)
{
return temp_tcgv_i32(s, tcgv_i64_temp(s, t) + 1);
}
#endif
static inline void tcg_set_insn_param(TCGOp *op, int arg, TCGArg v)
{
op->args[arg] = v;
}
static inline void tcg_set_insn_start_param(TCGOp *op, int arg, target_ulong v)
{
#if TARGET_LONG_BITS <= TCG_TARGET_REG_BITS
tcg_set_insn_param(op, arg, v);
#else
tcg_set_insn_param(op, arg * 2, v);
tcg_set_insn_param(op, arg * 2 + 1, v >> 32);
#endif
}
/* The last op that was emitted. */
static inline TCGOp *tcg_last_op(TCGContext *tcg_ctx)
{
return QTAILQ_LAST(&tcg_ctx->ops, TCGOpHead);
}
/* Test for whether to terminate the TB for using too many opcodes. */
static inline bool tcg_op_buf_full(TCGContext *tcg_ctx)
{
/* This is not a hard limit, it merely stops translation when
* we have produced "enough" opcodes. We want to limit TB size
* such that a RISC host can reasonably use a 16-bit signed
* branch within the TB.
*/
return tcg_ctx->nb_ops >= 8000;
}
TCGTemp *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, TCGReg reg, const char *name);
TCGv_i64 tcg_global_reg_new_i64(TCGContext *s, TCGReg reg, const char *name);
TCGTemp *tcg_temp_new_internal(TCGContext *s, TCGType, bool);
void tcg_temp_free_internal(TCGContext *s, TCGTemp *);
TCGv_vec tcg_temp_new_vec(TCGContext *s, TCGType type);
TCGv_vec tcg_temp_new_vec_matching(TCGContext *s, TCGv_vec match);
static inline void tcg_temp_free_i32(TCGContext *s, TCGv_i32 arg)
{
tcg_temp_free_internal(s, tcgv_i32_temp(s, arg));
}
static inline void tcg_temp_free_i64(TCGContext *s, TCGv_i64 arg)
{
tcg_temp_free_internal(s, tcgv_i64_temp(s, arg));
}
static inline void tcg_temp_free_ptr(TCGContext *s, TCGv_ptr arg)
{
tcg_temp_free_internal(s, tcgv_ptr_temp(s, arg));
}
static inline void tcg_temp_free_vec(TCGContext *s, TCGv_vec arg)
{
tcg_temp_free_internal(s, tcgv_vec_temp(s, arg));
}
static inline TCGv_i32 tcg_global_mem_new_i32(TCGContext *s, TCGv_ptr reg,
intptr_t offset, const char *name)
{
TCGTemp *t = tcg_global_mem_new_internal(s, TCG_TYPE_I32, reg, offset, name);
return temp_tcgv_i32(s, t);
}
static inline TCGv_i32 tcg_temp_new_i32(TCGContext *s)
{
TCGTemp *t = tcg_temp_new_internal(s, TCG_TYPE_I32, false);
return temp_tcgv_i32(s, t);
}
static inline TCGv_i32 tcg_temp_local_new_i32(TCGContext *s)
{
TCGTemp *t = tcg_temp_new_internal(s, TCG_TYPE_I32, true);
return temp_tcgv_i32(s, t);
}
static inline TCGv_i64 tcg_global_mem_new_i64(TCGContext *s, TCGv_ptr reg,
intptr_t offset, const char *name)
{
TCGTemp *t = tcg_global_mem_new_internal(s, TCG_TYPE_I64, reg, offset, name);
return temp_tcgv_i64(s, t);
}
static inline TCGv_i64 tcg_temp_new_i64(TCGContext *s)
{
TCGTemp *t = tcg_temp_new_internal(s, TCG_TYPE_I64, false);
return temp_tcgv_i64(s, t);
}
static inline TCGv_i64 tcg_temp_local_new_i64(TCGContext *s)
{
TCGTemp *t = tcg_temp_new_internal(s, TCG_TYPE_I64, true);
return temp_tcgv_i64(s, t);
}
static inline TCGv_ptr tcg_global_mem_new_ptr(TCGContext *s, TCGv_ptr reg, intptr_t offset,
const char *name)
{
TCGTemp *t = tcg_global_mem_new_internal(s, TCG_TYPE_PTR, reg, offset, name);
return temp_tcgv_ptr(s, t);
}
static inline TCGv_ptr tcg_temp_new_ptr(TCGContext* s)
{
TCGTemp *t = tcg_temp_new_internal(s, TCG_TYPE_PTR, false);
return temp_tcgv_ptr(s, t);
}
static inline TCGv_ptr tcg_temp_local_new_ptr(TCGContext *s)
{
TCGTemp *t = tcg_temp_new_internal(s, TCG_TYPE_PTR, true);
return temp_tcgv_ptr(s, t);
}
// UNICORN: Added
#define TCG_OP_DEFS_TABLE_SIZE 175
extern const TCGOpDef tcg_op_defs_org[TCG_OP_DEFS_TABLE_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)
bool tcg_op_supported(TCGOpcode op);
void tcg_gen_callN(TCGContext *s, void *func, TCGTemp *ret, int nargs, TCGTemp **args);
TCGOp *tcg_emit_op(TCGContext *s, TCGOpcode opc);
void tcg_op_remove(TCGContext *s, TCGOp *op);
TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *op, TCGOpcode opc);
TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *op, TCGOpcode opc);
void tcg_optimize(TCGContext *s);
/* Called with tb_lock held. */
static inline void *tcg_malloc(TCGContext *s, int size)
{
uint8_t *ptr, *ptr_end;
/* ??? This is a weak placeholder for minimum malloc alignment. */
size = QEMU_ALIGN_UP(size, 8);
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;
}
}
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);
TCGv_vec tcg_const_zeros_vec(TCGContext *s, TCGType);
TCGv_vec tcg_const_ones_vec(TCGContext *s, TCGType);
TCGv_vec tcg_const_zeros_vec_matching(TCGContext *s, TCGv_vec);
TCGv_vec tcg_const_ones_vec_matching(TCGContext *s, TCGv_vec);
#if UINTPTR_MAX == UINT32_MAX
# define tcg_const_ptr(t, x) ((TCGv_ptr)tcg_const_i32((t), (intptr_t)(x)))
# define tcg_const_local_ptr(t, x) ((TCGv_ptr)tcg_const_local_i32((t), (intptr_t)(x)))
# define tcg_global_reg_new_ptr(U, R, N) ((TCGv_ptr)tcg_global_reg_new_i32((U), (R), (N)))
#else
# define tcg_const_ptr(t, x) ((TCGv_ptr)tcg_const_i64((t), (intptr_t)(x)))
# define tcg_const_local_ptr(t, x) ((TCGv_ptr)tcg_const_local_i64((t), (intptr_t)(x)))
# define tcg_global_reg_new_ptr(U, R, N) ((TCGv_ptr)tcg_global_reg_new_i64((U), (R), (N)))
#endif
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: pointer to 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.
*
* Return: The return value is the value passed to the corresponding
* tcg_gen_exit_tb() at translation time of the last TB attempted to execute.
* The value is either zero or a 4-byte aligned pointer to that TB combined
* with additional information in its two least significant bits. The
* additional information is encoded as follows:
* 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 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
* handled). The pointer returned is the TB we were about to execute
* when we noticed the pending exit request.
* 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 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_IDXMAX 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
#if TCG_TARGET_MAYBE_vec
/* Return zero if the tuple (opc, type, vece) is unsupportable;
return > 0 if it is directly supportable;
return < 0 if we must call tcg_expand_vec_op. */
int tcg_can_emit_vec_op(TCGOpcode, TCGType, unsigned);
#else
static inline int tcg_can_emit_vec_op(TCGOpcode o, TCGType t, unsigned ve)
{
return 0;
}
#endif
/* Expand the tuple (opc, type, vece) on the given arguments. */
void tcg_expand_vec_op(TCGContext *s, TCGOpcode, TCGType, unsigned, TCGArg, ...);
/* Replicate a constant C accoring to the log2 of the element size. */
// Unicorn: renamed to avoid symbol clashing
uint64_t dup_const_impl(unsigned vece, uint64_t c);
#define dup_const(VECE, C) \
(__builtin_constant_p(VECE) \
? ( (VECE) == MO_8 ? 0x0101010101010101ull * (uint8_t)(C) \
: (VECE) == MO_16 ? 0x0001000100010001ull * (uint16_t)(C) \
: (VECE) == MO_32 ? 0x0000000100000001ull * (uint32_t)(C) \
: dup_const_impl(VECE, C)) \
: dup_const_impl(VECE, C))
/*
* 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);
uint8_t helper_ret_ldb_cmmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
uint16_t helper_le_ldw_cmmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
uint32_t helper_le_ldl_cmmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
uint64_t helper_le_ldq_cmmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
uint16_t helper_be_ldw_cmmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
uint32_t helper_be_ldl_cmmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
uint64_t helper_be_ldq_cmmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
uint32_t helper_atomic_cmpxchgb_mmu(CPUArchState *env, target_ulong addr,
uint32_t cmpv, uint32_t newv,
TCGMemOpIdx oi, uintptr_t retaddr);
uint32_t helper_atomic_cmpxchgw_le_mmu(CPUArchState *env, target_ulong addr,
uint32_t cmpv, uint32_t newv,
TCGMemOpIdx oi, uintptr_t retaddr);
uint32_t helper_atomic_cmpxchgl_le_mmu(CPUArchState *env, target_ulong addr,
uint32_t cmpv, uint32_t newv,
TCGMemOpIdx oi, uintptr_t retaddr);
uint64_t helper_atomic_cmpxchgq_le_mmu(CPUArchState *env, target_ulong addr,
uint64_t cmpv, uint64_t newv,
TCGMemOpIdx oi, uintptr_t retaddr);
uint32_t helper_atomic_cmpxchgw_be_mmu(CPUArchState *env, target_ulong addr,
uint32_t cmpv, uint32_t newv,
TCGMemOpIdx oi, uintptr_t retaddr);
uint32_t helper_atomic_cmpxchgl_be_mmu(CPUArchState *env, target_ulong addr,
uint32_t cmpv, uint32_t newv,
TCGMemOpIdx oi, uintptr_t retaddr);
uint64_t helper_atomic_cmpxchgq_be_mmu(CPUArchState *env, target_ulong addr,
uint64_t cmpv, uint64_t newv,
TCGMemOpIdx oi, uintptr_t retaddr);
#define GEN_ATOMIC_HELPER(NAME, TYPE, SUFFIX) \
TYPE helper_atomic_ ## NAME ## SUFFIX ## _mmu \
(CPUArchState *env, target_ulong addr, TYPE val, \
TCGMemOpIdx oi, uintptr_t retaddr);
#define GEN_ATOMIC_HELPER_ALL(NAME) \
GEN_ATOMIC_HELPER(NAME, uint32_t, b) \
GEN_ATOMIC_HELPER(NAME, uint32_t, w_le) \
GEN_ATOMIC_HELPER(NAME, uint32_t, l_le) \
GEN_ATOMIC_HELPER(NAME, uint64_t, q_le) \
GEN_ATOMIC_HELPER(NAME, uint32_t, w_be) \
GEN_ATOMIC_HELPER(NAME, uint32_t, l_be) \
GEN_ATOMIC_HELPER(NAME, uint64_t, q_be)
GEN_ATOMIC_HELPER_ALL(fetch_add)
GEN_ATOMIC_HELPER_ALL(fetch_sub)
GEN_ATOMIC_HELPER_ALL(fetch_and)
GEN_ATOMIC_HELPER_ALL(fetch_or)
GEN_ATOMIC_HELPER_ALL(fetch_xor)
GEN_ATOMIC_HELPER_ALL(fetch_smin)
GEN_ATOMIC_HELPER_ALL(fetch_umin)
GEN_ATOMIC_HELPER_ALL(fetch_smax)
GEN_ATOMIC_HELPER_ALL(fetch_umax)
GEN_ATOMIC_HELPER_ALL(add_fetch)
GEN_ATOMIC_HELPER_ALL(sub_fetch)
GEN_ATOMIC_HELPER_ALL(and_fetch)
GEN_ATOMIC_HELPER_ALL(or_fetch)
GEN_ATOMIC_HELPER_ALL(xor_fetch)
GEN_ATOMIC_HELPER_ALL(smin_fetch)
GEN_ATOMIC_HELPER_ALL(umin_fetch)
GEN_ATOMIC_HELPER_ALL(smax_fetch)
GEN_ATOMIC_HELPER_ALL(umax_fetch)
GEN_ATOMIC_HELPER_ALL(xchg)
#undef GEN_ATOMIC_HELPER_ALL
#undef GEN_ATOMIC_HELPER
/* 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_ldl_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
# define helper_ret_ldw_cmmu helper_be_ldw_cmmu
# define helper_ret_ldl_cmmu helper_be_ldl_cmmu
# define helper_ret_ldq_cmmu helper_be_ldq_cmmu
#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_ldl_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
# define helper_ret_ldw_cmmu helper_le_ldw_cmmu
# define helper_ret_ldl_cmmu helper_le_ldl_cmmu
# define helper_ret_ldq_cmmu helper_le_ldq_cmmu
#endif
#endif /* CONFIG_SOFTMMU */
/*
* These aren't really a "proper" helpers because TCG cannot manage Int128.
* However, use the same format as the others, for use by the backends.
*
* The cmpxchg functions are only defined if HAVE_CMPXCHG128;
* the ld/st functions are only defined if HAVE_ATOMIC128,
* as defined by <qemu/atomic128.h>.
*/
Int128 helper_atomic_cmpxchgo_le_mmu(CPUArchState *env, target_ulong addr,
Int128 cmpv, Int128 newv,
TCGMemOpIdx oi, uintptr_t retaddr);
Int128 helper_atomic_cmpxchgo_be_mmu(CPUArchState *env, target_ulong addr,
Int128 cmpv, Int128 newv,
TCGMemOpIdx oi, uintptr_t retaddr);
Int128 helper_atomic_ldo_le_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
Int128 helper_atomic_ldo_be_mmu(CPUArchState *env, target_ulong addr,
TCGMemOpIdx oi, uintptr_t retaddr);
void helper_atomic_sto_le_mmu(CPUArchState *env, target_ulong addr, Int128 val,
TCGMemOpIdx oi, uintptr_t retaddr);
void helper_atomic_sto_be_mmu(CPUArchState *env, target_ulong addr, Int128 val,
TCGMemOpIdx oi, uintptr_t retaddr);
#endif /* TCG_H */
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