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lightrec-private.h
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lightrec-private.h
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2016-2021 Paul Cercueil <[email protected]>
*/
#ifndef __LIGHTREC_PRIVATE_H__
#define __LIGHTREC_PRIVATE_H__
#include "lightning-wrapper.h"
#include "lightrec-config.h"
#include "disassembler.h"
#include "lightrec.h"
#include "regcache.h"
#if ENABLE_THREADED_COMPILER
#include <stdatomic.h>
#endif
#ifdef _MSC_BUILD
#include <immintrin.h>
#endif
#include <inttypes.h>
#include <stdint.h>
#define X32_FMT "0x%08"PRIx32
#define PC_FMT "PC "X32_FMT
#define ARRAY_SIZE(x) (sizeof(x) ? sizeof(x) / sizeof((x)[0]) : 0)
#define GENMASK(h, l) \
(((uintptr_t)-1 << (l)) & ((uintptr_t)-1 >> (__WORDSIZE - 1 - (h))))
#ifdef __GNUC__
# define likely(x) __builtin_expect(!!(x),1)
# define unlikely(x) __builtin_expect(!!(x),0)
#else
# define likely(x) (x)
# define unlikely(x) (x)
#endif
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
# define LE32TOH(x) __builtin_bswap32(x)
# define HTOLE32(x) __builtin_bswap32(x)
# define LE16TOH(x) __builtin_bswap16(x)
# define HTOLE16(x) __builtin_bswap16(x)
#else
# define LE32TOH(x) (x)
# define HTOLE32(x) (x)
# define LE16TOH(x) (x)
# define HTOLE16(x) (x)
#endif
#if HAS_DEFAULT_ELM
#define SET_DEFAULT_ELM(table, value) [0 ... ARRAY_SIZE(table) - 1] = value
#else
#define SET_DEFAULT_ELM(table, value) [0] = NULL
#endif
#if __has_attribute(__fallthrough__)
# define fallthrough __attribute__((__fallthrough__))
#else
# define fallthrough do {} while (0) /* fallthrough */
#endif
#define container_of(ptr, type, member) \
((type *)((void *)(ptr) - offsetof(type, member)))
#ifdef _MSC_BUILD
# define popcount32(x) __popcnt(x)
# define clz32(x) _lzcnt_u32(x)
# define ctz32(x) _tzcnt_u32(x)
#else
# define popcount32(x) __builtin_popcount(x)
# define clz32(x) __builtin_clz(x)
# define ctz32(x) __builtin_ctz(x)
#endif
/* Flags for (struct block *)->flags */
#define BLOCK_NEVER_COMPILE BIT(0)
#define BLOCK_SHOULD_RECOMPILE BIT(1)
#define BLOCK_FULLY_TAGGED BIT(2)
#define BLOCK_IS_DEAD BIT(3)
#define BLOCK_IS_MEMSET BIT(4)
#define BLOCK_NO_OPCODE_LIST BIT(5)
#define BLOCK_PRELOAD_PC BIT(6)
#define RAM_SIZE 0x200000
#define BIOS_SIZE 0x80000
#define CODE_LUT_SIZE ((RAM_SIZE + BIOS_SIZE) >> 2)
#define REG_LO 32
#define REG_HI 33
#define REG_TEMP (offsetof(struct lightrec_state, temp_reg) / sizeof(u32))
/* Definition of jit_state_t (avoids inclusion of <lightning.h>) */
struct jit_node;
struct jit_state;
typedef struct jit_state jit_state_t;
struct blockcache;
struct recompiler;
struct regcache;
struct opcode;
struct reaper;
struct u16x2 {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
u16 h, l;
#else
u16 l, h;
#endif
};
struct block {
jit_state_t *_jit;
struct opcode *opcode_list;
void (*function)(void);
const u32 *code;
struct block *next;
u32 pc;
u32 hash;
u32 precompile_date;
unsigned int code_size;
u16 nb_ops;
#if ENABLE_THREADED_COMPILER
_Atomic u8 flags;
#else
u8 flags;
#endif
};
struct lightrec_branch {
struct jit_node *branch;
u32 target;
};
struct lightrec_branch_target {
struct jit_node *label;
u32 offset;
};
enum c_wrappers {
C_WRAPPER_RW,
C_WRAPPER_RW_GENERIC,
C_WRAPPER_MFC,
C_WRAPPER_MTC,
C_WRAPPER_CP,
C_WRAPPERS_COUNT,
};
struct lightrec_cstate {
struct lightrec_state *state;
struct lightrec_branch local_branches[512];
struct lightrec_branch_target targets[512];
u16 movi_temp[32];
unsigned int nb_local_branches;
unsigned int nb_targets;
unsigned int cycles;
struct regcache *reg_cache;
_Bool no_load_delay;
};
struct lightrec_state {
struct lightrec_registers regs;
u32 temp_reg;
u32 curr_pc;
u32 next_pc;
uintptr_t wrapper_regs[NUM_TEMPS];
u8 in_delay_slot_n;
u32 current_cycle;
u32 target_cycle;
u32 exit_flags;
u32 old_cycle_counter;
u32 cycles_per_op;
void *c_wrapper;
struct block *dispatcher, *c_wrapper_block;
void *c_wrappers[C_WRAPPERS_COUNT];
struct blockcache *block_cache;
struct recompiler *rec;
struct lightrec_cstate *cstate;
struct reaper *reaper;
void *tlsf;
void (*eob_wrapper_func)(void);
void (*interpreter_func)(void);
void (*ds_check_func)(void);
void (*memset_func)(void);
void (*get_next_block)(void);
struct lightrec_ops ops;
unsigned int nb_precompile;
unsigned int nb_compile;
unsigned int nb_maps;
const struct lightrec_mem_map *maps;
uintptr_t offset_ram, offset_bios, offset_scratch, offset_io;
u32 opt_flags;
_Bool with_32bit_lut;
_Bool mirrors_mapped;
void *code_lut[];
};
#define lightrec_offset(ptr) \
offsetof(struct lightrec_state, ptr)
u32 lightrec_rw(struct lightrec_state *state, union code op, u32 addr,
u32 data, u32 *flags, struct block *block, u16 offset);
void lightrec_free_block(struct lightrec_state *state, struct block *block);
void remove_from_code_lut(struct blockcache *cache, struct block *block);
const struct lightrec_mem_map *
lightrec_get_map(struct lightrec_state *state, void **host, u32 kaddr);
static inline u32 kunseg(u32 addr)
{
if (unlikely(addr >= 0xa0000000))
return addr - 0xa0000000;
else
return addr &~ 0x80000000;
}
static inline u32 lut_offset(u32 pc)
{
if (pc & BIT(28))
return ((pc & (BIOS_SIZE - 1)) + RAM_SIZE) >> 2; // BIOS
else
return (pc & (RAM_SIZE - 1)) >> 2; // RAM
}
static inline _Bool is_big_endian(void)
{
return __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__;
}
static inline _Bool lut_is_32bit(const struct lightrec_state *state)
{
return __WORDSIZE == 32 ||
(ENABLE_CODE_BUFFER && state->with_32bit_lut);
}
static inline size_t lut_elm_size(const struct lightrec_state *state)
{
return lut_is_32bit(state) ? 4 : sizeof(void *);
}
static inline void ** lut_address(struct lightrec_state *state, u32 offset)
{
if (lut_is_32bit(state))
return (void **) ((uintptr_t) state->code_lut + offset * 4);
else
return &state->code_lut[offset];
}
static inline void * lut_read(struct lightrec_state *state, u32 offset)
{
void **lut_entry = lut_address(state, offset);
if (lut_is_32bit(state))
return (void *)(uintptr_t) *(u32 *) lut_entry;
else
return *lut_entry;
}
static inline void lut_write(struct lightrec_state *state, u32 offset, void *ptr)
{
void **lut_entry = lut_address(state, offset);
if (lut_is_32bit(state))
*(u32 *) lut_entry = (u32)(uintptr_t) ptr;
else
*lut_entry = ptr;
}
static inline u32 get_ds_pc(const struct block *block, u16 offset, s16 imm)
{
u16 flags = block->opcode_list[offset].flags;
offset += op_flag_no_ds(flags);
return block->pc + ((offset + imm) << 2);
}
static inline u32 get_branch_pc(const struct block *block, u16 offset, s16 imm)
{
u16 flags = block->opcode_list[offset].flags;
offset -= op_flag_no_ds(flags);
return block->pc + ((offset + imm) << 2);
}
void lightrec_mtc(struct lightrec_state *state, union code op, u8 reg, u32 data);
u32 lightrec_mfc(struct lightrec_state *state, union code op);
void lightrec_rfe(struct lightrec_state *state);
void lightrec_cp(struct lightrec_state *state, union code op);
struct lightrec_cstate * lightrec_create_cstate(struct lightrec_state *state);
void lightrec_free_cstate(struct lightrec_cstate *cstate);
union code lightrec_read_opcode(struct lightrec_state *state, u32 pc);
int lightrec_compile_block(struct lightrec_cstate *cstate, struct block *block);
void lightrec_free_opcode_list(struct lightrec_state *state,
struct opcode *list);
unsigned int lightrec_cycles_of_opcode(const struct lightrec_state *state,
union code code);
static inline u8 get_mult_div_lo(union code c)
{
return (OPT_FLAG_MULT_DIV && c.r.rd) ? c.r.rd : REG_LO;
}
static inline u8 get_mult_div_hi(union code c)
{
return (OPT_FLAG_MULT_DIV && c.r.imm) ? c.r.imm : REG_HI;
}
static inline s16 s16_max(s16 a, s16 b)
{
return a > b ? a : b;
}
static inline _Bool block_has_flag(struct block *block, u8 flag)
{
#if ENABLE_THREADED_COMPILER
return atomic_load_explicit(&block->flags, memory_order_relaxed) & flag;
#else
return block->flags & flag;
#endif
}
static inline u8 block_set_flags(struct block *block, u8 mask)
{
#if ENABLE_THREADED_COMPILER
return atomic_fetch_or_explicit(&block->flags, mask,
memory_order_relaxed);
#else
u8 flags = block->flags;
block->flags |= mask;
return flags;
#endif
}
static inline u8 block_clear_flags(struct block *block, u8 mask)
{
#if ENABLE_THREADED_COMPILER
return atomic_fetch_and_explicit(&block->flags, ~mask,
memory_order_relaxed);
#else
u8 flags = block->flags;
block->flags &= ~mask;
return flags;
#endif
}
static inline _Bool can_sign_extend(s32 value, u8 order)
{
return ((u32)(value >> (order - 1)) + 1) < 2;
}
static inline _Bool can_zero_extend(u32 value, u8 order)
{
return (value >> order) == 0;
}
static inline _Bool is_low_mask(u32 imm)
{
return imm & 1 ? popcount32(imm + 1) <= 1 : 0;
}
static inline _Bool is_high_mask(u32 imm)
{
return imm ? popcount32(imm + BIT(ctz32(imm))) == 0 : 0;
}
static inline const struct opcode *
get_delay_slot(const struct opcode *list, u16 i)
{
return op_flag_no_ds(list[i].flags) ? &list[i - 1] : &list[i + 1];
}
static inline _Bool lightrec_store_next_pc(void)
{
return NUM_REGS + NUM_TEMPS <= 4;
}
#endif /* __LIGHTREC_PRIVATE_H__ */