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| author | Richard Henderson <rth@cygnus.com> | 2000-05-29 00:52:26 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2000-05-29 00:52:26 -0700 |
| commit | 8f4773eae70e9869bcb5869c7073a0b8e6bc18f2 (patch) | |
| tree | f08d81eea8a5d69bcef8e82015e7cf308d5b8a7e /gcc/longlong.h | |
| parent | e2c7a29e977e9a8153565435ba058ae66f521cb9 (diff) | |
| download | gcc-8f4773eae70e9869bcb5869c7073a0b8e6bc18f2.tar.gz | |
longlong.h [__alpha] (count_leading_zeros): New.
* longlong.h [__alpha] (count_leading_zeros): New.
(count_trailing_zeros): New.
(COUNT_LEADING_ZEROS_0): New.
* config/alpha/alpha.c (alpha_zero_comparison_operator): New.
(alpha_split_conditional_move): New.
* config/alpha/alpha-protos.h: Prototype them.
* config/alpha/alpha.h (PREDICATE_CODES): Update.
(CPP_CPU_DEFAULT_SPEC): Fix typo for EV67.
* config/alpha/alpha.md: Update ffs cix commentary.
(*ze_and_ne): New.
(*nabssf2, *nabsdf2): New.
(*mov[qhsd]icc_internal): Use add_operand.
(if_then_else constant splitters): New.
(*cmp_sadd_di, *cmp_sadd_si, *cmp_sadd_sidi): New.
(*cmp_ssub_di, *cmp_ssub_si, *cmp_ssub_sidi): New.
From-SVN: r34250
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 |