| /** |
| * This file has no copyright assigned and is placed in the Public Domain. |
| * This file is part of the w64 mingw-runtime package. |
| * No warranty is given; refer to the file DISCLAIMER within this package. |
| */ |
| #include "cephes_mconf.h" |
| #ifndef _SET_ERRNO |
| #define _SET_ERRNO(x) |
| #endif |
| |
| #ifdef UNK |
| static long double P[] = { |
| -6.8473739392677100872869E-5L, |
| -9.5658283111794641589011E-1L, |
| -8.4053568599672284488465E1L, |
| -1.3080425704712825945553E3L, |
| }; |
| static long double Q[] = { |
| /* 1.0000000000000000000000E0L,*/ |
| 9.6259501838840336946872E1L, |
| 1.8218117903645559060232E3L, |
| 3.9241277114138477845780E3L, |
| }; |
| #endif |
| |
| #ifdef IBMPC |
| static unsigned short P[] = { |
| 0xd2a4,0x1b0c,0x8f15,0x8f99,0xbff1, XPD |
| 0x5959,0x9111,0x9cc7,0xf4e2,0xbffe, XPD |
| 0xb576,0xef5e,0x6d57,0xa81b,0xc005, XPD |
| 0xe3be,0xbfbd,0x5cbc,0xa381,0xc009, XPD |
| }; |
| static unsigned short Q[] = { |
| /*0x0000,0x0000,0x0000,0x8000,0x3fff,*/ |
| 0x687f,0xce24,0xdd6c,0xc084,0x4005, XPD |
| 0x3793,0xc95f,0xfa2f,0xe3b9,0x4009, XPD |
| 0xd5a2,0x1f9c,0x0b1b,0xf542,0x400a, XPD |
| }; |
| #endif |
| |
| #ifdef MIEEE |
| static long P[] = { |
| 0xbff10000,0x8f998f15,0x1b0cd2a4, |
| 0xbffe0000,0xf4e29cc7,0x91115959, |
| 0xc0050000,0xa81b6d57,0xef5eb576, |
| 0xc0090000,0xa3815cbc,0xbfbde3be, |
| }; |
| static long Q[] = { |
| /*0x3fff0000,0x80000000,0x00000000,*/ |
| 0x40050000,0xc084dd6c,0xce24687f, |
| 0x40090000,0xe3b9fa2f,0xc95f3793, |
| 0x400a0000,0xf5420b1b,0x1f9cd5a2, |
| }; |
| #endif |
| |
| long double tanhl(x) |
| 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 ); |
| } |
