1/* PR opt/13862 */
2/* { dg-do compile } */
3/* { dg-require-effective-target ilp32 } */
4/* { dg-options "-O" } */
5
6typedef struct _fame_syntax_t_ {
7} fame_syntax_t;
8
9typedef struct _fame_bitbuffer_t_
10{
11  unsigned char * base;
12  unsigned char * data;
13  unsigned long shift;
14} fame_bitbuffer_t;
15
16#define fast_bitbuffer_write(data, shift, c, l)				\
17{									\
18  int d;								\
19									\
20  asm("add %1, %%ecx\n"            /* ecx = shift + length */		\
21      "shrd %%cl, %2, %3\n"        /* adjust code to fit in */		\
22      "shr %%cl, %2\n"             /* adjust code to fit in */		\
23      "mov %%ecx, %1\n"            /* shift += length */		\
24      "bswap %2\n"                 /* reverse byte order of code */	\
25      "shr $5, %%ecx\n"            /* get dword increment */            \
26      "or %2, (%0)\n"              /* put first 32 bits */		\
27      "bswap %3\n"                 /* reverse byte order of code */	\
28      "lea   (%0, %%ecx, 4), %0\n" /* data += (ecx>32) */		\
29      "andl $31, %1\n"             /* mask shift */			\
30      "orl %3, (%0)\n"             /* put last 32 bits */		\
31      : "=r"(data), "=r"(shift), "=a"(d), "=d"(d), "=c"(d)		\
32      : "0"(data), "1"(shift), "2"((unsigned long) c), "3"(0),		\
33	"c"((unsigned long) l)						\
34      : "memory");							\
35}
36
37#define bitbuffer_write(bb, c, l) \
38  fast_bitbuffer_write((bb)->data, (bb)->shift, c, l)
39
40typedef enum { frame_type_I, frame_type_P } frame_type_t;
41
42typedef struct _fame_syntax_mpeg1_t_ {
43  fame_bitbuffer_t buffer;
44  frame_type_t frame_type;
45} fame_syntax_mpeg1_t;
46
47#define FAME_SYNTAX_MPEG1(x) ((fame_syntax_mpeg1_t *) x)
48
49void mpeg1_start_picture(fame_syntax_t *syntax)
50{
51  fame_syntax_mpeg1_t *syntax_mpeg1 = FAME_SYNTAX_MPEG1(syntax);
52  bitbuffer_write(&syntax_mpeg1->buffer, 0xFFFF, 16);
53
54  switch(syntax_mpeg1->frame_type) {
55    case frame_type_I:
56      bitbuffer_write(&syntax_mpeg1->buffer, 0, 1);
57    break;
58    case frame_type_P:
59      bitbuffer_write(&syntax_mpeg1->buffer, 0, 1);
60    break;
61  }
62}
63