| /** |
| * This file has no copyright assigned and is placed in the Public Domain. |
| * This file is part of the mingw-w64 runtime package. |
| * No warranty is given; refer to the file DISCLAIMER.PD within this package. |
| */ |
| #include "cephes_mconf.h" |
| #ifndef _SET_ERRNO |
| #define _SET_ERRNO(x) |
| #endif |
| |
| #ifdef UNK |
| static uLD P[] = { |
| { { -6.8473739392677100872869E-5L } }, |
| { { -9.5658283111794641589011E-1L } }, |
| { { -8.4053568599672284488465E1L } }, |
| { { -1.3080425704712825945553E3L } } |
| }; |
| static uLD Q[] = { |
| { { 9.6259501838840336946872E1L } }, |
| { { 1.8218117903645559060232E3L } }, |
| { { 3.9241277114138477845780E3L } } |
| }; |
| #endif |
| |
| #ifdef IBMPC |
| static uLD P[] = { |
| { { 0xd2a4,0x1b0c,0x8f15,0x8f99,0xbff1, 0, 0, 0 } }, |
| { { 0x5959,0x9111,0x9cc7,0xf4e2,0xbffe, 0, 0, 0 } }, |
| { { 0xb576,0xef5e,0x6d57,0xa81b,0xc005, 0, 0, 0 } }, |
| { { 0xe3be,0xbfbd,0x5cbc,0xa381,0xc009, 0, 0, 0 } } |
| }; |
| static uLD Q[] = { |
| { { 0x687f,0xce24,0xdd6c,0xc084,0x4005, 0, 0, 0 } }, |
| { { 0x3793,0xc95f,0xfa2f,0xe3b9,0x4009, 0, 0, 0 } }, |
| { { 0xd5a2,0x1f9c,0x0b1b,0xf542,0x400a, 0, 0, 0 } } |
| }; |
| #endif |
| |
| #ifdef MIEEE |
| static uLD P[] = { |
| { { 0xbff10000,0x8f998f15,0x1b0cd2a4, 0 } }, |
| { { 0xbffe0000,0xf4e29cc7,0x91115959, 0 } }, |
| { { 0xc0050000,0xa81b6d57,0xef5eb576, 0 } }, |
| { { 0xc0090000,0xa3815cbc,0xbfbde3be, 0 } } |
| }; |
| static uLD Q[] = { |
| { { 0x40050000,0xc084dd6c,0xce24687f, 0 } }, |
| { { 0x40090000,0xe3b9fa2f,0xc95f3793, 0 } }, |
| { { 0x400a0000,0xf5420b1b,0x1f9cd5a2, 0 } } |
| }; |
| #endif |
| |
| long double tanhl(long double x) |
| { |
| long double s, z; |
| |
| #ifdef MINUSZERO |
| if (x == 0.0L) |
| return (x); |
| #endif |
| if (isnanl(x)) |
| { |
| _SET_ERRNO (EDOM); |
| return x; |
| } |
| |
| z = fabsl(x); |
| if (z > 0.5L * MAXLOGL) |
| { |
| _SET_ERRNO (ERANGE); |
| if (x > 0) |
| return (1.0L); |
| else |
| return (-1.0L); |
| } |
| if (z >= 0.625L) |
| { |
| s = expl(2.0*z); |
| z = 1.0L - 2.0/(s + 1.0L); |
| if (x < 0) |
| z = -z; |
| } |
| else |
| { |
| s = x * x; |
| z = polevll( s, P, 3 )/p1evll(s, Q, 3); |
| z = x * s * z; |
| z = x + z; |
| } |
| return (z); |
| } |
| |