return (NEG_USR32(sign ^ cache, n) ^ sign) - sign;
}
+static inline int get_xbits_le(GetBitContext *s, int n)
+{
+ register int sign;
+ register int32_t cache;
+ OPEN_READER(re, s);
+ av_assert2(n>0 && n<=25);
+ UPDATE_CACHE_LE(re, s);
+ cache = GET_CACHE(re, s);
+ sign = sign_extend(~cache, n) >> 31;
+ LAST_SKIP_BITS(re, s, n);
+ CLOSE_READER(re, s);
+ return (zero_extend(sign ^ cache, n) ^ sign) - sign;
+}
+
static inline int get_sbits(GetBitContext *s, int n)
{
register int tmp;
*/
static inline unsigned int get_bits_long(GetBitContext *s, int n)
{
+ av_assert2(n>=0 && n<=32);
if (!n) {
return 0;
} else if (n <= MIN_CACHE_BITS) {
*/
static inline int get_sbits_long(GetBitContext *s, int n)
{
+ // sign_extend(x, 0) is undefined
+ if (!n)
+ return 0;
+
return sign_extend(get_bits_long(s, n), n);
}