/* vi: set sw=4 ts=4: */ /* * Wrapper functions implementing all the long double math functions * defined by SuSv3 by actually calling the double version of * each function and then casting the result back to a long double * to return to the user. * * Copyright (C) 2005 by Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ #include <features.h> /* Prevent math.h from defining colliding inlines */ #undef __USE_EXTERN_INLINES #include "math.h" #include <complex.h> #define WRAPPER1(func) \ long double func##l(long double x) \ { \ return (long double) func((double) x); \ } #define int_WRAPPER1(func) \ int func##l(long double x) \ { \ return func((double) x); \ } #define long_WRAPPER1(func) \ long func##l(long double x) \ { \ return func((double) x); \ } #define long_long_WRAPPER1(func) \ long long func##l(long double x) \ { \ return func((double) x); \ } #if defined __i386__ && defined __OPTIMIZE__ # 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... */ # 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__ */ #if defined __NO_LONG_DOUBLE_MATH # define int_WRAPPER_C99(func) /* not needed */ # else # define int_WRAPPER_C99(func) \ int func##l(long double x) \ { \ return func((double) x); \ } \ libm_hidden_def(func##l) #endif /* Implement the following, as defined by SuSv3 */ #if 0 long double acoshl(long double); long double acosl(long double); long double asinhl(long double); long double asinl(long double); long double atan2l(long double, long double); long double atanhl(long double); long double atanl(long double); long double cargl(long double complex); long double cbrtl(long double); long double ceill(long double); long double copysignl(long double, long double); long double coshl(long double); long double cosl(long double); long double erfcl(long double); long double erfl(long double); long double exp2l(long double); long double expl(long double); long double expm1l(long double); long double fabsl(long double); long double fdiml(long double, long double); long double floorl(long double); long double fmal(long double, long double, long double); long double fmaxl(long double, long double); long double fminl(long double, long double); long double fmodl(long double, long double); long double frexpl(long double value, int *); long double hypotl(long double, long double); int ilogbl(long double); long double ldexpl(long double, int); long double lgammal(long double); long long llrintl(long double); long long llroundl(long double); long double log10l(long double); long double log1pl(long double); long double log2l(long double); long double logbl(long double); long double logl(long double); long lrintl(long double); long lroundl(long double); long double modfl(long double, long double *); long double nearbyintl(long double); long double nextafterl(long double, long double); long double nexttowardl(long double, long double); long double powl(long double, long double); long double remainderl(long double, long double); long double remquol(long double, long double, int *); long double rintl(long double); long double roundl(long double); long double scalblnl(long double, long); long double scalbnl(long double, int); long double sinhl(long double); long double sinl(long double); long double sqrtl(long double); long double tanhl(long double); long double tanl(long double); long double tgammal(long double); long double truncl(long double); #endif #ifdef L_acoshl WRAPPER1(acosh) #endif #ifdef L_acosl WRAPPER1(acos) #endif #ifdef L_asinhl WRAPPER1(asinh) #endif #ifdef L_asinl WRAPPER1(asin) #endif #ifdef L_atan2l long double atan2l (long double x, long double y) { return (long double) atan2( (double)x, (double)y ); } #endif #ifdef L_atanhl WRAPPER1(atanh) #endif #ifdef L_atanl WRAPPER1(atan) #endif #ifdef L_cargl long double cargl (long double complex x) { return (long double) carg( (double complex)x ); } #endif #ifdef L_cbrtl WRAPPER1(cbrt) #endif #ifdef L_ceill WRAPPER1(ceil) #endif #ifdef L_copysignl long double copysignl (long double x, long double y) { return (long double) copysign( (double)x, (double)y ); } #endif #ifdef L_coshl WRAPPER1(cosh) #endif #ifdef L_cosl WRAPPER1(cos) #endif #ifdef L_erfcl WRAPPER1(erfc) #endif #ifdef L_erfl WRAPPER1(erf) #endif #ifdef L_exp2l WRAPPER1(exp2) #endif #ifdef L_expl WRAPPER1(exp) #endif #ifdef L_expm1l WRAPPER1(expm1) #endif #ifdef L_fabsl WRAPPER1(fabs) #endif #ifdef L_fdiml long double fdiml (long double x, long double y) { return (long double) fdim( (double)x, (double)y ); } #endif #ifdef L_floorl WRAPPER1(floor) #endif #ifdef L_fmal long double fmal (long double x, long double y, long double z) { return (long double) fma( (double)x, (double)y, (double)z ); } #endif #ifdef L_fmaxl long double fmaxl (long double x, long double y) { return (long double) fmax( (double)x, (double)y ); } #endif #ifdef L_fminl long double fminl (long double x, long double y) { return (long double) fmin( (double)x, (double)y ); } #endif #ifdef L_fmodl long double fmodl (long double x, long double y) { return (long double) fmod( (double)x, (double)y ); } #endif #ifdef L_frexpl long double frexpl (long double x, int *ex) { return (long double) frexp( (double)x, 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); } #endif #ifdef L_hypotl long double hypotl (long double x, long double y) { return (long double) hypot( (double)x, (double)y ); } #endif #ifdef L_ilogbl int_WRAPPER1(ilogb) #endif #ifdef L_ldexpl long double ldexpl (long double x, int ex) { return (long double) ldexp( (double)x, ex ); } #endif #ifdef L_lgammal WRAPPER1(lgamma) #endif #ifdef L_llrintl long_long_WRAPPER1(llrint) #endif #ifdef L_llroundl long_long_WRAPPER1(llround) #endif #ifdef L_log10l WRAPPER1(log10) #endif #ifdef L_log1pl WRAPPER1(log1p) #endif #ifdef L_log2l /* WRAPPER1(log2) won't work */ long double log2l(long double x) { return (long double) log2((double)x); } #endif #ifdef L_logbl WRAPPER1(logb) #endif #ifdef L_logl WRAPPER1(log) #endif #ifdef L_lrintl long_WRAPPER1(lrint) #endif #ifdef L_lroundl long_WRAPPER1(lround) #endif #ifdef L_modfl long double modfl (long double x, long double *iptr) { double y, result; result = modf ( x, &y ); *iptr = (long double)y; return (long double) result; } #endif #ifdef L_nearbyintl WRAPPER1(nearbyint) #endif #ifdef L_nextafterl long double nextafterl (long double x, long double y) { return (long double) nextafter( (double)x, (double)y ); } #endif /* Disabled in Makefile.in */ #if 0 /* def L_nexttowardl */ long double nexttowardl (long double x, long double y) { return (long double) nexttoward( (double)x, (double)y ); } libm_hidden_def(nexttowardl) #endif #ifdef L_powl long double powl (long double x, long double y) { return (long double) pow( (double)x, (double)y ); } #endif #ifdef L_remainderl long double remainderl (long double x, long double y) { return (long double) remainder( (double)x, (double)y ); } #endif #ifdef L_remquol long double remquol (long double x, long double y, int *quo) { return (long double) remquo( (double)x, (double)y, quo ); } #endif #ifdef L_rintl WRAPPER1(rint) #endif #ifdef L_roundl WRAPPER1(round) #endif #ifdef L_scalblnl long double scalblnl (long double x, long ex) { return (long double) scalbln( (double)x, ex ); } #endif #ifdef L_scalbnl long double scalbnl (long double x, int ex) { return (long double) scalbn( (double)x, ex ); } #endif /* scalb is an obsolete function */ #ifdef L_sinhl WRAPPER1(sinh) #endif #ifdef L_sinl WRAPPER1(sin) #endif #ifdef L_sqrtl WRAPPER1(sqrt) #endif #ifdef L_tanhl WRAPPER1(tanh) #endif #ifdef L_tanl WRAPPER1(tan) #endif #ifdef L_tgammal WRAPPER1(tgamma) #endif #ifdef L_truncl 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); } #endif #ifdef __DO_C99_MATH__ #ifdef L___fpclassifyl int_WRAPPER_C99(__fpclassify) #endif #ifdef L___finitel int_WRAPPER_C99(__finite) #endif #ifdef L___signbitl int_WRAPPER_C99(__signbit) #endif #ifdef L___isnanl int_WRAPPER_C99(__isnan) #endif #ifdef L___isinfl int_WRAPPER_C99(__isinf) #endif #endif