feat(userspace/libc): update math functions

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

Userspace/libc/include/math.h

@@ -18,13 +18,13 @@
 #ifndef _MATH_H
 #define _MATH_H
 
+#include <float.h>
+
 #ifdef __cplusplus
 extern "C"
 {
 #endif // __cplusplus
 
-#define FLT_EVAL_METHOD 0
-
 #if FLT_EVAL_METHOD == 0
 	typedef float float_t;
 	typedef double double_t;
@@ -38,186 +38,254 @@ typedef long double double_t;
 #error "Unsupported FLT_EVAL_METHOD"
 #endif
 
+#define fpclassify(x) __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, FP_SUBNORMAL, FP_ZERO, (x))
+#define isfinite(x) __builtin_isfinite(x)
+#define isgreater(x, y) __builtin_isgreater(x, y)
+#define isgreaterequal(x, y) __builtin_isgreaterequal(x, y)
+#define isinf(x) __builtin_isinf(x)
+#define isless(x, y) __builtin_isless(x, y)
+#define islessequal(x, y) __builtin_islessequal(x, y)
+#define islessgreater(x, y) __builtin_islessgreater(x, y)
+#define isnan(x) __builtin_isnan(x)
+#define isnormal(x) __builtin_isnormal(x)
+#define isunordered(x, y) __builtin_isunordered(x, y)
+#define signbit(x) __builtin_signbit(x)
+
+#define M_E 2.71828182845904523536
+#define M_El 2.71828182845904523536028747135266249775724709369995L
+#define M_EGAMMA 0.57721566490153286060
+#define M_EGAMMAl 0.57721566490153286060651209008240243104215933593992L
+#define M_LOG2E 1.44269504088896340736
+#define M_LOG2El 1.44269504088896340735992468100189213742664595415299L
+#define M_LOG10E 0.43429448190325182765
+#define M_LOG10El 0.43429448190325182765112891891660508229439700580366L
+#define M_LN2 0.69314718055994530942
+#define M_LN2l 0.69314718055994530941723212145817656807550013436026L
+#define M_LN10 2.30258509299404568402
+#define M_LN10l 2.30258509299404568401799145468436420760110148862877L
+#define M_PHI 1.61803398874989484820
+#define M_PHIl 1.61803398874989484820458683436563811772030917980576L
+#define M_PI 3.14159265358979323846
+#define M_PIl 3.14159265358979323846264338327950288419716939937510L
+#define M_PI_2 1.57079632679489661923
+#define M_PI_2l 1.57079632679489661923132169163975144209858469968755L
+#define M_PI_4 0.78539816339744830962
+#define M_PI_4l 0.78539816339744830961566084581987572104929234984378L
+#define M_1_PI 0.31830988618379067154
+#define M_1_PIl 0.31830988618379067153776752674502872406891929148091L
+#define M_1_SQRTPI 0.56418958354775628695
+#define M_1_SQRTPIl 0.56418958354775628694807945156077258584405062932899L
+#define M_2_PI 0.63661977236758134308
+#define M_2_PIl 0.63661977236758134307553505349005744813783858296182L
+#define M_2_SQRTPI 1.12837916709551257390
+#define M_2_SQRTPIl 1.12837916709551257389615890312154517168810125865798L
+#define M_SQRT2 1.41421356237309504880
+#define M_SQRT2l 1.41421356237309504880168872420969807856967187537694L
+#define M_SQRT3 1.73205080756887729352
+#define M_SQRT3l 1.73205080756887729352744634150587236694280525381038L
+#define M_SQRT1_2 0.70710678118654752440
+#define M_SQRT1_2l 0.70710678118654752440084436210484903928483593768847L
+#define M_SQRT1_3 0.57735026918962576450
+#define M_SQRT1_3l 0.57735026918962576450914878050195745564760175127013L
+
+#define HUGE_VAL (__builtin_huge_val())
+#define HUGE_VALF (__builtin_huge_valf())
+#define HUGE_VALL (__builtin_huge_vall())
+
+#define FP_INFINITE 1
+#define FP_NAN 2
+#define FP_NORMAL 3
+#define FP_SUBNORMAL 4
+#define FP_ZERO 5
+
+#define FP_ILOGB0 (-2147483647 - 1)
+#define FP_ILOGBNAN 2147483647
+
+#define MATH_ERRNO 1
+#define MATH_ERREXCEPT 2
+
+#define math_errhandling (MATH_ERRNO | MATH_ERREXCEPT)
+
 	extern int signgam;
 
-	double acos(double);
+	double acos(double x);
-	float acosf(float);
+	float acosf(float x);
-	double acosh(double);
+	double acosh(double x);
-	float acoshf(float);
+	float acoshf(float x);
-	long double acoshl(long double);
+	long double acoshl(long double x);
-	long double acosl(long double);
+	long double acosl(long double x);
-	double asin(double);
+	double asin(double x);
-	float asinf(float);
+	float asinf(float x);
-	double asinh(double);
+	double asinh(double x);
-	float asinhf(float);
+	float asinhf(float x);
-	long double asinhl(long double);
+	long double asinhl(long double x);
-	long double asinl(long double);
+	long double asinl(long double x);
-	double atan(double);
+	double atan(double x);
-	double atan2(double, double);
+	double atan2(double y, double x);
-	float atan2f(float, float);
+	float atan2f(float y, float x);
-	long double atan2l(long double, long double);
+	long double atan2l(long double y, long double x);
-	float atanf(float);
+	float atanf(float x);
-	double atanh(double);
+	double atanh(double x);
-	float atanhf(float);
+	float atanhf(float x);
-	long double atanhl(long double);
+	long double atanhl(long double x);
-	long double atanl(long double);
+	long double atanl(long double x);
-	double cbrt(double);
+	double cbrt(double x);
-	float cbrtf(float);
+	float cbrtf(float x);
-	long double cbrtl(long double);
+	long double cbrtl(long double x);
-	double ceil(double);
+	double ceil(double x);
-	float ceilf(float);
+	float ceilf(float x);
-	long double ceill(long double);
+	long double ceill(long double x);
-	double copysign(double, double);
+	double copysign(double x, double y);
-	float copysignf(float, float);
+	float copysignf(float x, float y);
-	long double copysignl(long double, long double);
+	long double copysignl(long double x, long double y);
 	double cos(double x);
 	float cosf(float x);
 	double cosh(double x);
 	float coshf(float x);
 	long double coshl(long double x);
 	long double cosl(long double x);
-	double erf(double);
+	double erf(double x);
-	double erfc(double);
+	double erfc(double x);
-	float erfcf(float);
+	float erfcf(float x);
-	long double erfcl(long double);
+	long double erfcl(long double x);
-	float erff(float);
+	float erff(float x);
-	long double erfl(long double);
+	long double erfl(long double x);
-	double exp(double);
+	double exp(double x);
-	double exp2(double);
+	double exp2(double x);
-	float exp2f(float);
+	float exp2f(float x);
-	long double exp2l(long double);
+	long double exp2l(long double x);
-	float expf(float);
+	float expf(float x);
-	long double expl(long double);
+	long double expl(long double x);
-	double expm1(double);
+	double expm1(double x);
-	float expm1f(float);
+	float expm1f(float x);
-	long double expm1l(long double);
+	long double expm1l(long double x);
-	double fabs(double);
+	double fabs(double x);
-	float fabsf(float);
+	float fabsf(float x);
-	long double fabsl(long double);
+	long double fabsl(long double x);
-	double fdim(double, double);
+	double fdim(double x, double y);
-	float fdimf(float, float);
+	float fdimf(float x, float y);
-	long double fdiml(long double, long double);
+	long double fdiml(long double x, long double y);
-	double floor(double);
+	double floor(double x);
-	float floorf(float);
+	float floorf(float x);
-	long double floorl(long double);
+	long double floorl(long double x);
-	double fma(double, double, double);
+	double fma(double x, double y, double z);
-	float fmaf(float, float, float);
+	float fmaf(float x, float y, float z);
-	long double fmal(long double, long double, long double);
+	long double fmal(long double x, long double y, long double z);
-	double fmax(double, double);
+	double fmax(double x, double y);
-	float fmaxf(float, float);
+	float fmaxf(float x, float y);
-	long double fmaxl(long double, long double);
+	long double fmaxl(long double x, long double y);
-	double fmin(double, double);
+	double fmin(double x, double y);
-	float fminf(float, float);
+	float fminf(float x, float y);
-	long double fminl(long double, long double);
+	long double fminl(long double x, long double y);
-	double fmod(double, double);
+	double fmod(double x, double y);
-	float fmodf(float, float);
+	float fmodf(float x, float y);
-	long double fmodl(long double, long double);
+	long double fmodl(long double x, long double y);
-	double frexp(double, int *);
+	double frexp(double num, int *exp);
-	float frexpf(float value, int *);
+	float frexpf(float num, int *exp);
-	long double frexpl(long double value, int *);
+	long double frexpl(long double num, int *exp);
-	double hypot(double, double);
+	double hypot(double x, double y);
-	float hypotf(float, float);
+	float hypotf(float x, float y);
-	long double hypotl(long double, long double);
+	long double hypotl(long double x, long double y);
-	int ilogb(double);
+	int ilogb(double x);
-	int ilogbf(float);
+	int ilogbf(float x);
-	int ilogbl(long double);
+	int ilogbl(long double x);
-	double j0(double);
+	double j0(double x);
-	double j1(double);
+	double j1(double x);
-	double jn(int, double);
+	double jn(int n, double x);
-	double ldexp(double, int);
+	double ldexp(double x, int exp);
-	float ldexpf(float, int);
+	float ldexpf(float x, int exp);
-	long double ldexpl(long double, int);
+	long double ldexpl(long double x, int exp);
-	double lgamma(double);
+	double lgamma(double x);
-	float lgammaf(float);
+	float lgammaf(float x);
-	long double lgammal(long double);
+	long double lgammal(long double x);
-	long long llrint(double);
+	long long llrint(double x);
-	long long llrintf(float);
+	long long llrintf(float x);
-	long long llrintl(long double);
+	long long llrintl(long double x);
-	long long llround(double);
+	long long llround(double x);
-	long long llroundf(float);
+	long long llroundf(float x);
-	long long llroundl(long double);
+	long long llroundl(long double x);
-	double log(double);
+	double log(double x);
-	double log10(double);
+	double log10(double x);
-	float log10f(float);
+	float log10f(float x);
-	long double log10l(long double);
+	long double log10l(long double x);
-	double log1p(double);
+	double log1p(double x);
-	float log1pf(float);
+	float log1pf(float x);
-	long double log1pl(long double);
+	long double log1pl(long double x);
-	double log2(double);
+	double log2(double x);
-	float log2f(float);
+	float log2f(float x);
-	long double log2l(long double);
+	long double log2l(long double x);
-	double logb(double);
+	double logb(double x);
-	float logbf(float);
+	float logbf(float x);
-	long double logbl(long double);
+	long double logbl(long double x);
-	float logf(float);
+	float logf(float x);
-	long double logl(long double);
+	long double logl(long double x);
-	long lrint(double);
+	long lrint(double x);
-	long lrintf(float);
+	long lrintf(float x);
-	long lrintl(long double);
+	long lrintl(long double x);
-	long lround(double);
+	long lround(double x);
-	long lroundf(float);
+	long lroundf(float x);
-	long lroundl(long double);
+	long lroundl(long double x);
-	double modf(double, double *);
+	double modf(double x, double *iptr);
-	float modff(float, float *);
+	float modff(float value, float *iptr);
-	long double modfl(long double, long double *);
+	long double modfl(long double x, long double *iptr);
-	double nan(const char *);
+	double nan(const char *tagp);
-	float nanf(const char *);
+	float nanf(const char *tagp);
-	long double nanl(const char *);
+	long double nanl(const char *tagp);
-	double nearbyint(double);
+	double nearbyint(double x);
-	float nearbyintf(float);
+	float nearbyintf(float x);
-	long double nearbyintl(long double);
+	long double nearbyintl(long double x);
-	double nextafter(double, double);
+	double nextafter(double x, double y);
-	float nextafterf(float, float);
+	float nextafterf(float x, float y);
-	long double nextafterl(long double, long double);
+	long double nextafterl(long double x, long double y);
-	double nexttoward(double, long double);
+	double nexttoward(double x, long double y);
-	float nexttowardf(float, long double);
+	float nexttowardf(float x, long double y);
-	long double nexttowardl(long double, long double);
+	long double nexttowardl(long double x, long double y);
-	double pow(double, double);
+	double pow(double x, double y);
-	float powf(float, float);
+	float powf(float x, float y);
-	long double powl(long double, long double);
+	long double powl(long double x, long double y);
-	double remainder(double, double);
+	double remainder(double x, double y);
-	float remainderf(float, float);
+	float remainderf(float x, float y);
-	long double remainderl(long double, long double);
+	long double remainderl(long double x, long double y);
-	double remquo(double, double, int *);
+	double remquo(double x, double y, int *quo);
-	float remquof(float, float, int *);
+	float remquof(float x, float y, int *quo);
-	long double remquol(long double, long double, int *);
+	long double remquol(long double x, long double y, int *quo);
-	double rint(double);
+	double rint(double x);
-	float rintf(float);
+	float rintf(float x);
-	long double rintl(long double);
+	long double rintl(long double x);
-	double round(double);
+	double round(double x);
-	float roundf(float);
+	float roundf(float x);
-	long double roundl(long double);
+	long double roundl(long double x);
-	double scalb(double, double);
+	double scalb(double x, double y);
-	double scalbln(double, long);
+	double scalbln(double x, long n);
-	float scalblnf(float, long);
+	float scalblnf(float x, long n);
-	long double scalblnl(long double, long);
+	long double scalblnl(long double x, long n);
-	double scalbn(double, int);
+	double scalbn(double x, int n);
-	float scalbnf(float, int);
+	float scalbnf(float x, int n);
-	long double scalbnl(long double, int);
+	long double scalbnl(long double x, int n);
 	double sin(double x);
 	float sinf(float x);
 	double sinh(double x);
 	float sinhf(float x);
 	long double sinhl(long double x);
 	long double sinl(long double x);
-	double sqrt(double);
+	double sqrt(double x);
-	float sqrtf(float);
+	float sqrtf(float x);
-	long double sqrtl(long double);
+	long double sqrtl(long double x);
-	double tan(double);
+	double tan(double x);
-	float tanf(float);
+	float tanf(float x);
-	double tanh(double);
+	double tanh(double x);
-	float tanhf(float);
+	float tanhf(float x);
-	long double tanhl(long double);
+	long double tanhl(long double x);
-	long double tanl(long double);
+	long double tanl(long double x);
-	double tgamma(double);
+	double tgamma(double x);
-	float tgammaf(float);
+	float tgammaf(float x);
-	long double tgammal(long double);
+	long double tgammal(long double x);
-	double trunc(double);
+	double trunc(double x);
-	float truncf(float);
+	float truncf(float x);
-	long double truncl(long double);
+	long double truncl(long double x);
-	double y0(double);
+	double y0(double x);
-	double y1(double);
+	double y1(double x);
-	double yn(int, double);
+	double yn(int n, double x);
 
 #ifdef __cplusplus
 }

Userspace/libc/src/std/math.c

@@ -38,165 +38,165 @@ export double atan(double x);
 export double atan2(double y, double x);
 export float atan2f(float y, float x);
 export long double atan2l(long double y, long double x);
-export float atanf(float);
+export float atanf(float x);
-export double atanh(double);
+export double atanh(double x);
-export float atanhf(float);
+export float atanhf(float x);
-export long double atanhl(long double);
+export long double atanhl(long double x);
-export long double atanl(long double);
+export long double atanl(long double x);
-export double cbrt(double);
+export double cbrt(double x);
-export float cbrtf(float);
+export float cbrtf(float x);
-export long double cbrtl(long double);
+export long double cbrtl(long double x);
-export double ceil(double);
+export double ceil(double x);
-export float ceilf(float);
+export float ceilf(float x);
-export long double ceill(long double);
+export long double ceill(long double x);
-export double copysign(double, double);
+export double copysign(double x, double y);
-export float copysignf(float, float);
+export float copysignf(float x, float y);
-export long double copysignl(long double, long double);
+export long double copysignl(long double x, long double y);
 export double cos(double x);
 export float cosf(float x);
 export double cosh(double x);
 export float coshf(float x);
 export long double coshl(long double x);
 export long double cosl(long double x);
-export double erf(double);
+export double erf(double x);
-export double erfc(double);
+export double erfc(double x);
-export float erfcf(float);
+export float erfcf(float x);
-export long double erfcl(long double);
+export long double erfcl(long double x);
-export float erff(float);
+export float erff(float x);
-export long double erfl(long double);
+export long double erfl(long double x);
-export double exp(double);
+export double exp(double x);
-export double exp2(double);
+export double exp2(double x);
-export float exp2f(float);
+export float exp2f(float x);
-export long double exp2l(long double);
+export long double exp2l(long double x);
-export float expf(float);
+export float expf(float x);
-export long double expl(long double);
+export long double expl(long double x);
-export double expm1(double);
+export double expm1(double x);
-export float expm1f(float);
+export float expm1f(float x);
-export long double expm1l(long double);
+export long double expm1l(long double x);
-export double fabs(double);
+export double fabs(double x);
-export float fabsf(float);
+export float fabsf(float x);
-export long double fabsl(long double);
+export long double fabsl(long double x);
-export double fdim(double, double);
+export double fdim(double x, double y);
-export float fdimf(float, float);
+export float fdimf(float x, float y);
-export long double fdiml(long double, long double);
+export long double fdiml(long double x, long double y);
-export double floor(double);
+export double floor(double x);
-export float floorf(float);
+export float floorf(float x);
-export long double floorl(long double);
+export long double floorl(long double x);
-export double fma(double, double, double);
+export double fma(double x, double y, double z);
-export float fmaf(float, float, float);
+export float fmaf(float x, float y, float z);
-export long double fmal(long double, long double, long double);
+export long double fmal(long double x, long double y, long double z);
-export double fmax(double, double);
+export double fmax(double x, double y);
-export float fmaxf(float, float);
+export float fmaxf(float x, float y);
-export long double fmaxl(long double, long double);
+export long double fmaxl(long double x, long double y);
-export double fmin(double, double);
+export double fmin(double x, double y);
-export float fminf(float, float);
+export float fminf(float x, float y);
-export long double fminl(long double, long double);
+export long double fminl(long double x, long double y);
-export double fmod(double, double);
+export double fmod(double x, double y);
-export float fmodf(float, float);
+export float fmodf(float x, float y);
-export long double fmodl(long double, long double);
+export long double fmodl(long double x, long double y);
-export double frexp(double, int *);
+export double frexp(double num, int *exp);
-export float frexpf(float value, int *);
+export float frexpf(float num, int *exp);
-export long double frexpl(long double value, int *);
+export long double frexpl(long double num, int *exp);
-export double hypot(double, double);
+export double hypot(double x, double y);
-export float hypotf(float, float);
+export float hypotf(float x, float y);
-export long double hypotl(long double, long double);
+export long double hypotl(long double x, long double y);
-export int ilogb(double);
+export int ilogb(double x);
-export int ilogbf(float);
+export int ilogbf(float x);
-export int ilogbl(long double);
+export int ilogbl(long double x);
-export double j0(double);
+export double j0(double x);
-export double j1(double);
+export double j1(double x);
-export double jn(int, double);
+export double jn(int n, double x);
-export double ldexp(double, int);
+export double ldexp(double x, int exp);
-export float ldexpf(float, int);
+export float ldexpf(float x, int exp);
-export long double ldexpl(long double, int);
+export long double ldexpl(long double x, int exp);
-export double lgamma(double);
+export double lgamma(double x);
-export float lgammaf(float);
+export float lgammaf(float x);
-export long double lgammal(long double);
+export long double lgammal(long double x);
-export long long llrint(double);
+export long long llrint(double x);
-export long long llrintf(float);
+export long long llrintf(float x);
-export long long llrintl(long double);
+export long long llrintl(long double x);
-export long long llround(double);
+export long long llround(double x);
-export long long llroundf(float);
+export long long llroundf(float x);
-export long long llroundl(long double);
+export long long llroundl(long double x);
-export double log(double);
+export double log(double x);
-export double log10(double);
+export double log10(double x);
-export float log10f(float);
+export float log10f(float x);
-export long double log10l(long double);
+export long double log10l(long double x);
-export double log1p(double);
+export double log1p(double x);
-export float log1pf(float);
+export float log1pf(float x);
-export long double log1pl(long double);
+export long double log1pl(long double x);
-export double log2(double);
+export double log2(double x);
-export float log2f(float);
+export float log2f(float x);
-export long double log2l(long double);
+export long double log2l(long double x);
-export double logb(double);
+export double logb(double x);
-export float logbf(float);
+export float logbf(float x);
-export long double logbl(long double);
+export long double logbl(long double x);
-export float logf(float);
+export float logf(float x);
-export long double logl(long double);
+export long double logl(long double x);
-export long lrint(double);
+export long lrint(double x);
-export long lrintf(float);
+export long lrintf(float x);
-export long lrintl(long double);
+export long lrintl(long double x);
-export long lround(double);
+export long lround(double x);
-export long lroundf(float);
+export long lroundf(float x);
-export long lroundl(long double);
+export long lroundl(long double x);
-export double modf(double, double *);
+export double modf(double x, double *iptr);
-export float modff(float, float *);
+export float modff(float value, float *iptr);
-export long double modfl(long double, long double *);
+export long double modfl(long double x, long double *iptr);
-export double nan(const char *);
+export double nan(const char *tagp);
-export float nanf(const char *);
+export float nanf(const char *tagp);
-export long double nanl(const char *);
+export long double nanl(const char *tagp);
-export double nearbyint(double);
+export double nearbyint(double x);
-export float nearbyintf(float);
+export float nearbyintf(float x);
-export long double nearbyintl(long double);
+export long double nearbyintl(long double x);
-export double nextafter(double, double);
+export double nextafter(double x, double y);
-export float nextafterf(float, float);
+export float nextafterf(float x, float y);
-export long double nextafterl(long double, long double);
+export long double nextafterl(long double x, long double y);
-export double nexttoward(double, long double);
+export double nexttoward(double x, long double y);
-export float nexttowardf(float, long double);
+export float nexttowardf(float x, long double y);
-export long double nexttowardl(long double, long double);
+export long double nexttowardl(long double x, long double y);
-export double pow(double, double);
+export double pow(double x, double y);
-export float powf(float, float);
+export float powf(float x, float y);
-export long double powl(long double, long double);
+export long double powl(long double x, long double y);
-export double remainder(double, double);
+export double remainder(double x, double y);
-export float remainderf(float, float);
+export float remainderf(float x, float y);
-export long double remainderl(long double, long double);
+export long double remainderl(long double x, long double y);
-export double remquo(double, double, int *);
+export double remquo(double x, double y, int *quo);
-export float remquof(float, float, int *);
+export float remquof(float x, float y, int *quo);
-export long double remquol(long double, long double, int *);
+export long double remquol(long double x, long double y, int *quo);
-export double rint(double);
+export double rint(double x);
-export float rintf(float);
+export float rintf(float x);
-export long double rintl(long double);
+export long double rintl(long double x);
-export double round(double);
+export double round(double x);
-export float roundf(float);
+export float roundf(float x);
-export long double roundl(long double);
+export long double roundl(long double x);
-export double scalb(double, double);
+export double scalb(double x, double y);
-export double scalbln(double, long);
+export double scalbln(double x, long n);
-export float scalblnf(float, long);
+export float scalblnf(float x, long n);
-export long double scalblnl(long double, long);
+export long double scalblnl(long double x, long n);
-export double scalbn(double, int);
+export double scalbn(double x, int n);
-export float scalbnf(float, int);
+export float scalbnf(float x, int n);
-export long double scalbnl(long double, int);
+export long double scalbnl(long double x, int n);
 export double sin(double x);
 export float sinf(float x);
 export double sinh(double x);
 export float sinhf(float x);
 export long double sinhl(long double x);
 export long double sinl(long double x);
-export double sqrt(double);
+export double sqrt(double x);
-export float sqrtf(float);
+export float sqrtf(float x);
-export long double sqrtl(long double);
+export long double sqrtl(long double x);
-export double tan(double);
+export double tan(double x);
-export float tanf(float);
+export float tanf(float x);
-export double tanh(double);
+export double tanh(double x);
-export float tanhf(float);
+export float tanhf(float x);
-export long double tanhl(long double);
+export long double tanhl(long double x);
-export long double tanl(long double);
+export long double tanl(long double x);
-export double tgamma(double);
+export double tgamma(double x);
-export float tgammaf(float);
+export float tgammaf(float x);
-export long double tgammal(long double);
+export long double tgammal(long double x);
-export double trunc(double);
+export double trunc(double x);
-export float truncf(float);
+export float truncf(float x);
-export long double truncl(long double);
+export long double truncl(long double x);
-export double y0(double);
+export double y0(double x);
-export double y1(double);
+export double y1(double x);
-export double yn(int, double);
+export double yn(int n, double x);