diff options
Diffstat (limited to 'gcc/longlong.h')
| -rw-r--r-- | gcc/longlong.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/gcc/longlong.h b/gcc/longlong.h index aa9aea585e4..1c1456974cb 100644 --- a/gcc/longlong.h +++ b/gcc/longlong.h @@ -169,6 +169,39 @@ extern UDItype __udiv_qrnnd PARAMS ((UDItype *, UDItype, UDItype, UDItype)); #define UDIV_TIME 220 #endif /* LONGLONG_STANDALONE */ +#ifdef __alpha_cix__ +#define count_leading_zeros(COUNT,X) \ + __asm__("ctlz %1,%0" : "=r"(COUNT) : "r"(X)) +#define count_trailing_zeros(COUNT,X) \ + __asm__("cttz %1,%0" : "=r"(COUNT) : "r"(X)) +#define COUNT_LEADING_ZEROS_0 64 +#else +extern const UQItype __clz_tab[]; +#define count_leading_zeros(COUNT,X) \ + do { \ + UDItype __xr = (X), __t, __a; \ + __asm__("cmpbge %1,%2,%0" : "=r"(__t) : "r"(~__xr), "r"(-1)); \ + __a = __clz_tab[__t ^ 0xff] - 1; \ + __asm__("extbl %1,%2,%0" : "=r"(__t) : "r"(__xr), "r"(__a)); \ + (COUNT) = 64 - (__clz_tab[__t] + __a*8); \ + } while (0) +#define count_trailing_zeros(COUNT,X) \ + do { \ + UDItype __xr = (X), __t, __a; \ + __asm__("cmpbge %1,%2,%0" : "=r"(__t) : "r"(~__xr), "r"(-1)); \ + __t = ~__t & -~__t; \ + __a = ((__t & 0xCC) != 0) * 2; \ + __a += ((__t & 0xF0) != 0) * 4; \ + __a += ((__t & 0xAA) != 0); \ + __asm__("extbl %1,%2,%0" : "=r"(__t) : "r"(__xr), "r"(__a)); \ + __a <<= 3; \ + __t &= -__t; \ + __a += ((__t & 0xCC) != 0) * 2; \ + __a += ((__t & 0xF0) != 0) * 4; \ + __a += ((__t & 0xAA) != 0); \ + (COUNT) = __a; \ + } while (0) +#endif /* __alpha_cix__ */ #endif /* __alpha */ #if defined (__arc__) && W_TYPE_SIZE == 32 |