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/* NOTE: this header is included in op-i386.c where global register
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   variable are used. Care must be used when including glibc headers.
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 */
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#ifndef CPU_I386_H
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#define CPU_I386_H
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#include <setjmp.h>
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#define R_EAX 0
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#define R_ECX 1
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#define R_EDX 2
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#define R_EBX 3
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#define R_ESP 4
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#define R_EBP 5
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#define R_ESI 6
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#define R_EDI 7
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#define R_AL 0
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#define R_CL 1
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#define R_DL 2
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#define R_BL 3
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#define R_AH 4
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#define R_CH 5
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#define R_DH 6
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#define R_BH 7
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#define R_ES 0
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#define R_CS 1
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#define R_SS 2
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#define R_DS 3
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#define R_FS 4
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#define R_GS 5
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#define CC_C           0x0001
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#define CC_P         0x0004
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#define CC_A        0x0010
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#define CC_Z        0x0040
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#define CC_S    0x0080
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#define CC_O    0x0800
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#define TRAP_FLAG                0x0100
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#define INTERRUPT_FLAG                0x0200
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#define DIRECTION_FLAG                0x0400
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#define IOPL_FLAG_MASK                0x3000
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#define NESTED_FLAG                0x4000
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#define BYTE_FL                        0x8000        /* Intel reserved! */
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#define RF_FLAG                        0x10000
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#define VM_FLAG                        0x20000
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/* AC                                0x40000 */
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#define EXCP00_DIVZ        1
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#define EXCP01_SSTP        2
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#define EXCP02_NMI        3
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#define EXCP03_INT3        4
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#define EXCP04_INTO        5
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#define EXCP05_BOUND        6
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#define EXCP06_ILLOP        7
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#define EXCP07_PREX        8
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#define EXCP08_DBLE        9
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#define EXCP09_XERR        10
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#define EXCP0A_TSS        11
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#define EXCP0B_NOSEG        12
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#define EXCP0C_STACK        13
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#define EXCP0D_GPF        14
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#define EXCP0E_PAGE        15
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#define EXCP10_COPR        17
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#define EXCP11_ALGN        18
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#define EXCP12_MCHK        19
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#define EXCP_SIGNAL        256 /* async signal */
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enum {
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    CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
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    CC_OP_EFLAGS,  /* all cc are explicitely computed, CC_SRC = flags */
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    CC_OP_MUL, /* modify all flags, C, O = (CC_SRC != 0) */
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    CC_OP_ADDB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
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    CC_OP_ADDW,
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    CC_OP_ADDL,
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    CC_OP_ADCB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
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    CC_OP_ADCW,
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    CC_OP_ADCL,
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    CC_OP_SUBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
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    CC_OP_SUBW,
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    CC_OP_SUBL,
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    CC_OP_SBBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
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    CC_OP_SBBW,
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    CC_OP_SBBL,
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    CC_OP_LOGICB, /* modify all flags, CC_DST = res */
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    CC_OP_LOGICW,
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    CC_OP_LOGICL,
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    CC_OP_INCB, /* modify all flags except, CC_DST = res, CC_SRC = C */
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    CC_OP_INCW,
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    CC_OP_INCL,
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    CC_OP_DECB, /* modify all flags except, CC_DST = res, CC_SRC = C  */
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    CC_OP_DECW,
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    CC_OP_DECL,
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    CC_OP_SHLB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
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    CC_OP_SHLW,
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    CC_OP_SHLL,
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    CC_OP_SARB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
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    CC_OP_SARW,
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    CC_OP_SARL,
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    CC_OP_NB,
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};
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#ifdef __i386__
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//#define USE_X86LDOUBLE
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#endif
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#ifdef USE_X86LDOUBLE
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typedef long double CPU86_LDouble;
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#else
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typedef double CPU86_LDouble;
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#endif
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typedef struct CPUX86State {
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    /* standard registers */
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    uint32_t regs[8];
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    uint32_t pc; /* cs_case + eip value */
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    uint32_t eflags;
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    /* emulator internal eflags handling */
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    uint32_t cc_src;
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    uint32_t cc_dst;
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    uint32_t cc_op;
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    int32_t df; /* D flag : 1 if D = 0, -1 if D = 1 */
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    /* segments */
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    uint8_t *segs_base[6];
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    /* FPU state */
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    unsigned int fpstt; /* top of stack index */
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    unsigned int fpus;
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    unsigned int fpuc;
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    uint8_t fptags[8];   /* 0 = valid, 1 = empty */
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    CPU86_LDouble fpregs[8];    
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    /* segments */
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    uint32_t segs[6];
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    /* emulator internal variables */
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    CPU86_LDouble ft0;
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    /* exception handling */
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    jmp_buf jmp_env;
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    int exception_index;
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} CPUX86State;
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static inline int ldub(void *ptr)
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{
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    return *(uint8_t *)ptr;
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}
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static inline int ldsb(void *ptr)
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{
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    return *(int8_t *)ptr;
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}
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static inline int lduw(void *ptr)
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{
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    return *(uint16_t *)ptr;
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}
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static inline int ldsw(void *ptr)
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{
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    return *(int16_t *)ptr;
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}
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static inline int ldl(void *ptr)
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{
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    return *(uint32_t *)ptr;
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}
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static inline uint64_t ldq(void *ptr)
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{
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    return *(uint64_t *)ptr;
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}
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static inline void stb(void *ptr, int v)
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{
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    *(uint8_t *)ptr = v;
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}
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static inline void stw(void *ptr, int v)
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{
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    *(uint16_t *)ptr = v;
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}
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static inline void stl(void *ptr, int v)
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{
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    *(uint32_t *)ptr = v;
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}
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static inline void stq(void *ptr, uint64_t v)
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{
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    *(uint64_t *)ptr = v;
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}
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/* float access */
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static inline float ldfl(void *ptr)
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{
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    return *(float *)ptr;
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}
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static inline double ldfq(void *ptr)
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{
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    return *(double *)ptr;
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}
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static inline void stfl(void *ptr, float v)
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{
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    *(float *)ptr = v;
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}
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static inline void stfq(void *ptr, double v)
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{
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    *(double *)ptr = v;
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}
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#ifndef IN_OP_I386
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void cpu_x86_outb(int addr, int val);
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void cpu_x86_outw(int addr, int val);
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void cpu_x86_outl(int addr, int val);
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int cpu_x86_inb(int addr);
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int cpu_x86_inw(int addr);
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int cpu_x86_inl(int addr);
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#endif
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CPUX86State *cpu_x86_init(void);
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int cpu_x86_exec(CPUX86State *s);
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void cpu_x86_close(CPUX86State *s);
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/* internal functions */
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int cpu_x86_gen_code(uint8_t *gen_code_buf, int max_code_size, 
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                     int *gen_code_size_ptr, uint8_t *pc_start);
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void cpu_x86_tblocks_init(void);
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#endif /* CPU_I386_H */