From 29b12174ee3d44a351974dee6c6394c05bd8b18e Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 7 May 1997 15:27:44 +0000 Subject: [PATCH] m68k specific complex sine implementation for double. --- sysdeps/m68k/fpu/s_csin.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 sysdeps/m68k/fpu/s_csin.c diff --git a/sysdeps/m68k/fpu/s_csin.c b/sysdeps/m68k/fpu/s_csin.c new file mode 100644 index 0000000..8eecd96 --- /dev/null +++ b/sysdeps/m68k/fpu/s_csin.c @@ -0,0 +1,69 @@ +/* Complex sine function. m68k fpu version + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Schwab . + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#define __LIBC_M81_MATH_INLINES +#include +#include + +#ifndef SUFF +#define SUFF +#endif +#ifndef float_type +#define float_type double +#endif + +#define CONCATX(a,b) __CONCAT(a,b) +#define s(name) CONCATX(name,SUFF) +#define m81(func) __m81_u(s(func)) + +__complex__ float_type +s(__csin) (__complex__ float_type x) +{ + __complex__ float_type retval; + unsigned long rx_cond = __m81_test (__real__ x); + + if ((rx_cond & (__M81_COND_INF|__M81_COND_NAN)) == 0) + { + /* Real part is finite. */ + float_type sin_rx, cos_rx; + + __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_rx), "=f" (cos_rx) + : "f" (__real__ x)); + if (rx_cond & __M81_COND_ZERO) + __real__ retval = __real__ x; + else + __real__ retval = sin_rx * m81(__ieee754_cosh) (__imag__ x); + __imag__ retval = cos_rx * m81(__ieee754_sinh) (__imag__ x); + } + else + { + unsigned long ix_cond = __m81_test (__imag__ x); + + __real__ retval = __real__ x - __real__ x; + if (ix_cond & (__M81_COND_ZERO|__M81_COND_INF|__M81_COND_NAN)) + __imag__ retval = __imag__ x; + else + __imag__ retval = __real__ retval; + } + + return retval; +} +#define weak_aliasx(a,b) weak_alias(a,b) +weak_aliasx (s(__csin), s(csin)) -- 2.7.4