diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | stdlib/strtod_l.c | 44 |
2 files changed, 28 insertions, 21 deletions
@@ -1,3 +1,8 @@ +2013-02-19 Jakub Jelinek <jakub@redhat.com> + + * stdlib/strtod_l.c (__mpn_lshift_1): Rewritten as function-like + macro. + 2013-02-19 Siddhesh Poyarekar <siddhesh@redhat.com> * stdlib/cxa_thread_atexit_impl.c: Fix Copyright year. diff --git a/stdlib/strtod_l.c b/stdlib/strtod_l.c index 5959354ecc..47247b548c 100644 --- a/stdlib/strtod_l.c +++ b/stdlib/strtod_l.c @@ -444,28 +444,30 @@ str_to_mpn (const STRING_TYPE *str, int digcnt, mp_limb_t *n, mp_size_t *nsize, /* Shift {PTR, SIZE} COUNT bits to the left, and fill the vacated bits with the COUNT most significant bits of LIMB. - Tege doesn't like this function so I have to write it here myself. :) + Implemented as a macro, so that __builtin_constant_p works even at -O0. + + Tege doesn't like this macro so I have to write it here myself. :) --drepper */ -static inline void -__attribute ((always_inline)) -__mpn_lshift_1 (mp_limb_t *ptr, mp_size_t size, unsigned int count, - mp_limb_t limb) -{ - if (__builtin_constant_p (count) && count == BITS_PER_MP_LIMB) - { - /* Optimize the case of shifting by exactly a word: - just copy words, with no actual bit-shifting. */ - mp_size_t i; - for (i = size - 1; i > 0; --i) - ptr[i] = ptr[i - 1]; - ptr[0] = limb; - } - else - { - (void) __mpn_lshift (ptr, ptr, size, count); - ptr[0] |= limb >> (BITS_PER_MP_LIMB - count); - } -} +#define __mpn_lshift_1(ptr, size, count, limb) \ + do \ + { \ + mp_limb_t *__ptr = (ptr); \ + if (__builtin_constant_p (count) && count == BITS_PER_MP_LIMB) \ + { \ + mp_size_t i; \ + for (i = (size) - 1; i > 0; --i) \ + __ptr[i] = __ptr[i - 1]; \ + __ptr[0] = (limb); \ + } \ + else \ + { \ + /* We assume count > 0 && count < BITS_PER_MP_LIMB here. */ \ + unsigned int __count = (count); \ + (void) __mpn_lshift (__ptr, __ptr, size, __count); \ + __ptr[0] |= (limb) >> (BITS_PER_MP_LIMB - __count); \ + } \ + } \ + while (0) #define INTERNAL(x) INTERNAL1(x) |