1 /* PR opt/13862 */
2 /* { dg-do compile } */
3 /* { dg-require-effective-target ilp32 } */
4 /* { dg-options "-O" } */
5
6 typedef struct _fame_syntax_t_ {
7 } fame_syntax_t;
8
9 typedef 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
40 typedef enum { frame_type_I, frame_type_P } frame_type_t;
41
42 typedef 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
mpeg1_start_picture(fame_syntax_t * syntax)49 void 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