summaryrefslogtreecommitdiff log msg author committer range
path: root/src/math/exp10l.c
blob: b758ebffe1dac7332d4ce874acc49abbc5870a1a (plain)
 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 ``` ``````#define _GNU_SOURCE #include #include #include "libc.h" #include "libm.h" #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 long double exp10l(long double x) { return exp10(x); } #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384 long double exp10l(long double x) { static const long double p10[] = { 1e-15L, 1e-14L, 1e-13L, 1e-12L, 1e-11L, 1e-10L, 1e-9L, 1e-8L, 1e-7L, 1e-6L, 1e-5L, 1e-4L, 1e-3L, 1e-2L, 1e-1L, 1, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10, 1e11, 1e12, 1e13, 1e14, 1e15 }; long double n, y = modfl(x, &n); union ldshape u = {n}; /* fabsl(n) < 16 without raising invalid on nan */ if ((u.i.se & 0x7fff) < 0x3fff+4) { if (!y) return p10[(int)n+15]; y = exp2l(3.32192809488736234787031942948939L * y); return y * p10[(int)n+15]; } return powl(10.0, x); } #endif weak_alias(exp10l, pow10l); ``````