diff options
Diffstat (limited to 'libm/ldouble_wrappers.c')
| -rw-r--r-- | libm/ldouble_wrappers.c | 105 |
1 files changed, 3 insertions, 102 deletions
diff --git a/libm/ldouble_wrappers.c b/libm/ldouble_wrappers.c index 0fe6e8d97..b98a20181 100644 --- a/libm/ldouble_wrappers.c +++ b/libm/ldouble_wrappers.c @@ -37,91 +37,6 @@ long long func##l(long double x) \ return func((double) x); \ } -#if defined __i386__ && defined __OPTIMIZE__ && !defined __SSP_ALL__ -# undef WRAPPER1 -# undef int_WRAPPER1 -# undef long_WRAPPER1 -# undef long_long_WRAPPER1 -/* gcc 4.3.1 generates really ugly code with redundant pair of store/load: - * sub $0x10,%esp - * fldt 0x14(%esp) - * fstpl 0x8(%esp) - * fldl 0x8(%esp) <-- ?? - * fstpl (%esp) <-- ?? - * call function - * add $0x10,%esp - * ret - * I can hope newer gcc will eliminate that. However, I don't think - * it will be smart enough to reuse argument stack space and use - * jump instead of call. Let's do it by hand. - * The asm below loads long double x into st(0), then stores it back - * to the same location, but as a double. At this point, stack looks - * exactly as "double func(double)" expects it to be. - * The return value is returned in st(0) per ABI in both cases (returning - * a long double or returning a double). So we can simply jump to func. - * Using __GI_func in jump to make optimized intra-library jump. - * gcc will still generate a useless "ret" after asm. Oh well... - * - * If you discover a build mode in which gcc creates a stack frame - * incompatible with this hack, do not "fix" by replacing jmp with call - * in the wrappers. This will make functions use wrong offset - * for accessing on-stack parameter. - * Instead, add more conditions to guarding #if above. - */ -# define WRAPPER1(func) \ -long double func##l(long double x) \ -{ \ - long double st_top; \ - __asm__ ( \ - " fldt %1\n" \ - " fstpl %1\n" \ - " jmp " __stringify(__GI_##func) "\n" \ - : "=t" (st_top) \ - : "m" (x) \ - ); \ - return st_top; \ -} -# define int_WRAPPER1(func) \ -int func##l(long double x) \ -{ \ - int ret; \ - __asm__ ( \ - " fldt %1\n" \ - " fstpl %1\n" \ - " jmp " __stringify(__GI_##func) "\n" \ - : "=a" (ret) \ - : "m" (x) \ - ); \ - return ret; \ -} -# define long_WRAPPER1(func) \ -long func##l(long double x) \ -{ \ - long ret; \ - __asm__ ( \ - " fldt %1\n" \ - " fstpl %1\n" \ - " jmp " __stringify(__GI_##func) "\n" \ - : "=a" (ret) \ - : "m" (x) \ - ); \ - return ret; \ -} -# define long_long_WRAPPER1(func) \ -long long func##l(long double x) \ -{ \ - long long ret; \ - __asm__ ( \ - " fldt %1\n" \ - " fstpl %1\n" \ - " jmp " __stringify(__GI_##func) "\n" \ - : "=A" (ret) \ - : "m" (x) \ - ); \ - return ret; \ -} -#endif /* __i386__ && __OPTIMIZE__ */ - /* Implement the following, as defined by SuSv3 */ #if 0 long double acoshl(long double); @@ -315,12 +230,7 @@ long double frexpl (long double x, int *ex) #endif #ifdef L_gammal -/* WRAPPER1(gamma) won't work, tries to call __GI_xxx, - * and gamma() hasn't got one. */ -long double gammal(long double x) -{ - return (long double) gamma((double) x); -} +WRAPPER1(gamma) #endif #ifdef L_hypotl @@ -362,11 +272,7 @@ WRAPPER1(log1p) #endif #ifdef L_log2l -/* WRAPPER1(log2) won't work */ -long double log2l(long double x) -{ - return (long double) log2((double)x); -} +WRAPPER1(log2) #endif #ifdef L_logbl @@ -489,12 +395,7 @@ WRAPPER1(trunc) #endif #ifdef L_significandl -/* WRAPPER1(significand) won't work, tries to call __GI_xxx, - * and significand() hasn't got one. */ -long double significandl(long double x) -{ - return (long double) significand((double) x); -} +WRAPPER1(significand) #endif #if defined __DO_C99_MATH__ && !defined __NO_LONG_DOUBLE_MATH |