s_csinhf.c revision 226458
1/*- 2 * Copyright (c) 2005 Bruce D. Evans and Steven G. Kargl 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27/* 28 * Hyperbolic sine of a complex argument z. See s_csinh.c for details. 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD: head/lib/msun/src/s_csinhf.c 226458 2011-10-17 05:41:03Z das $"); 33 34#include <complex.h> 35#include <math.h> 36 37#include "math_private.h" 38 39float complex 40csinhf(float complex z) 41{ 42 float x, y; 43 int32_t hx, hy, ix, iy; 44 45 x = crealf(z); 46 y = cimagf(z); 47 48 GET_FLOAT_WORD(hx, x); 49 GET_FLOAT_WORD(hy, y); 50 51 ix = 0x7fffffff & hx; 52 iy = 0x7fffffff & hy; 53 54 if (ix < 0x7f800000 && iy < 0x7f800000) { 55 if (iy == 0) 56 return (cpackf(sinhf(x), y)); 57 /* XXX We don't handle |x| > FLT_MAX ln(2) yet. */ 58 return (cpackf(sinhf(x) * cosf(y), coshf(x) * sinf(y))); 59 } 60 61 if (ix == 0 && iy >= 0x7f800000) 62 return (cpackf(copysignf(0, x * (y - y)), y - y)); 63 64 if (iy == 0 && ix >= 0x7f800000) { 65 if ((hx & 0x7fffff) == 0) 66 return (cpackf(x, copysignf(0, x) * y)); 67 return (cpackf(x, copysignf(0, y))); 68 } 69 70 if (ix < 0x7f800000 && iy >= 0x7f800000) 71 return (cpackf(y - y, x * (y - y))); 72 73 if (ix >= 0x7f800000 && (hx & 0x7fffff) == 0) { 74 if (iy >= 0x7f800000) 75 return (cpackf(x * x, x * (y - y))); 76 return (cpackf(x * cosf(y), INFINITY * sinf(y))); 77 } 78 79 return (cpackf((x * x) * (y - y), (x + x) * (y - y))); 80} 81 82float complex 83csinf(float complex z) 84{ 85 86 z = csinhf(cpackf(-cimagf(z), crealf(z))); 87 return (cpackf(cimagf(z), -crealf(z))); 88} 89