Subversion Repositories openrisc

/* PR opt/13862 */

/* { dg-do compile { target i?86-*-* x86_64-*-* } } */

/* { dg-require-effective-target ilp32 } */

/* { dg-options "-O" } */

typedef struct _fame_syntax_t_ {

} fame_syntax_t;

typedef struct _fame_bitbuffer_t_

{

  unsigned char * base;

  unsigned char * data;

  unsigned long shift;

} fame_bitbuffer_t;

#define fast_bitbuffer_write(data, shift, c, l)                         \

{                                                                       \

  int d;                                                                \

                                                                        \

  asm("add %1, %%ecx\n"            /* ecx = shift + length */           \

      "shrd %%cl, %2, %3\n"        /* adjust code to fit in */          \

      "shr %%cl, %2\n"             /* adjust code to fit in */          \

      "mov %%ecx, %1\n"            /* shift += length */                \

      "bswap %2\n"                 /* reverse byte order of code */     \

      "shr $5, %%ecx\n"            /* get dword increment */            \

      "or %2, (%0)\n"              /* put first 32 bits */              \

      "bswap %3\n"                 /* reverse byte order of code */     \

      "lea   (%0, %%ecx, 4), %0\n" /* data += (ecx>32) */               \

      "andl $31, %1\n"             /* mask shift */                     \

      "orl %3, (%0)\n"             /* put last 32 bits */               \

      : "=r"(data), "=r"(shift), "=a"(d), "=d"(d), "=c"(d)              \

      : "0"(data), "1"(shift), "2"((unsigned long) c), "3"(0),            \

        "c"((unsigned long) l)                                          \

      : "memory");                                                      \

}

#define bitbuffer_write(bb, c, l) \

  fast_bitbuffer_write((bb)->data, (bb)->shift, c, l)

typedef enum { frame_type_I, frame_type_P } frame_type_t;

typedef struct _fame_syntax_mpeg1_t_ {

  fame_bitbuffer_t buffer;

  frame_type_t frame_type;

} fame_syntax_mpeg1_t;

#define FAME_SYNTAX_MPEG1(x) ((fame_syntax_mpeg1_t *) x)

void mpeg1_start_picture(fame_syntax_t *syntax)

{

  fame_syntax_mpeg1_t *syntax_mpeg1 = FAME_SYNTAX_MPEG1(syntax);

  bitbuffer_write(&syntax_mpeg1->buffer, 0xFFFF, 16);

  switch(syntax_mpeg1->frame_type) {

    case frame_type_I:

      bitbuffer_write(&syntax_mpeg1->buffer, 0, 1);

    break;

    case frame_type_P:

      bitbuffer_write(&syntax_mpeg1->buffer, 0, 1);

    break;

  }

}