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/* PR opt/13862 */
/* { dg-do compile } */
/* { 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;
}
}
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