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re PR libquadmath/56379 (libquadmath: Wrong result for strtoflt128.c if compiled with -O0) 

PR libquadmath/56379
	* strtod/strtod_l.c (mpn_lshift_1): Rewritten as function-like
	macro.

From-SVN: r196155
This commit is contained in:
Jakub Jelinek 2013-02-19 22:50:10 +01:00 committed by Jakub Jelinek
parent 406defcb58
commit d6988187cd
2 changed files with 29 additions and 21 deletions
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6
libquadmath/ChangeLog
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@ -1,3 +1,9 @@
2013-02-19 Jakub Jelinek <jakub@redhat.com>
PR libquadmath/56379
* strtod/strtod_l.c (mpn_lshift_1): Rewritten as function-like
macro.
2013-02-17 Tobias Burnus <burnus@net-b.de> 2013-02-17 Tobias Burnus <burnus@net-b.de>
* math/cacoshq.c (cacoshq): Call signbitq instead of signbit. * math/cacoshq.c (cacoshq): Call signbitq instead of signbit.

44
libquadmath/strtod/strtod_l.c
View File

@ -421,28 +421,30 @@ 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 /* Shift {PTR, SIZE} COUNT bits to the left, and fill the vacated bits
with the COUNT most significant bits of LIMB. 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 */ --drepper */
static inline void #define mpn_lshift_1(ptr, size, count, limb) \
__attribute ((always_inline)) do \
mpn_lshift_1 (mp_limb_t *ptr, mp_size_t size, unsigned int count, { \
mp_limb_t limb) mp_limb_t *__ptr = (ptr); \
{ if (__builtin_constant_p (count) && count == BITS_PER_MP_LIMB) \
if (__builtin_constant_p (count) && count == BITS_PER_MP_LIMB) { \
{ mp_size_t i; \
/* Optimize the case of shifting by exactly a word: for (i = (size) - 1; i > 0; --i) \
just copy words, with no actual bit-shifting. */ __ptr[i] = __ptr[i - 1]; \
mp_size_t i; __ptr[0] = (limb); \
for (i = size - 1; i > 0; --i) } \
ptr[i] = ptr[i - 1]; else \
ptr[0] = limb; { \
} /* We assume count > 0 && count < BITS_PER_MP_LIMB here. */ \
else unsigned int __count = (count); \
{ (void) mpn_lshift (__ptr, __ptr, size, __count); \
(void) mpn_lshift (ptr, ptr, size, count); __ptr[0] |= (limb) >> (BITS_PER_MP_LIMB - __count); \
ptr[0] |= limb >> (BITS_PER_MP_LIMB - count); } \
} } \
} while (0)
#define INTERNAL(x) INTERNAL1(x) #define INTERNAL(x) INTERNAL1(x)