diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-96/e_atan2l.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/e_atan2l.c | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/sysdeps/ieee754/ldbl-96/e_atan2l.c b/sysdeps/ieee754/ldbl-96/e_atan2l.c deleted file mode 100644 index 209f29bbd2..0000000000 --- a/sysdeps/ieee754/ldbl-96/e_atan2l.c +++ /dev/null @@ -1,125 +0,0 @@ -/* e_atan2l.c -- long double version of e_atan2.c. - * Conversion to long double by Ulrich Drepper, - * Cygnus Support, drepper@cygnus.com. - */ - -/* - * ==================================================== - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. - * - * Developed at SunPro, a Sun Microsystems, Inc. business. - * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice - * is preserved. - * ==================================================== - */ - -/* __ieee754_atan2l(y,x) - * Method : - * 1. Reduce y to positive by atan2(y,x)=-atan2(-y,x). - * 2. Reduce x to positive by (if x and y are unexceptional): - * ARG (x+iy) = arctan(y/x) ... if x > 0, - * ARG (x+iy) = pi - arctan[y/(-x)] ... if x < 0, - * - * Special cases: - * - * ATAN2((anything), NaN ) is NaN; - * ATAN2(NAN , (anything) ) is NaN; - * ATAN2(+-0, +(anything but NaN)) is +-0 ; - * ATAN2(+-0, -(anything but NaN)) is +-pi ; - * ATAN2(+-(anything but 0 and NaN), 0) is +-pi/2; - * ATAN2(+-(anything but INF and NaN), +INF) is +-0 ; - * ATAN2(+-(anything but INF and NaN), -INF) is +-pi; - * ATAN2(+-INF,+INF ) is +-pi/4 ; - * ATAN2(+-INF,-INF ) is +-3pi/4; - * ATAN2(+-INF, (anything but,0,NaN, and INF)) is +-pi/2; - * - * Constants: - * The hexadecimal values are the intended ones for the following - * constants. The decimal values may be used, provided that the - * compiler will convert from decimal to binary accurately enough - * to produce the hexadecimal values shown. - */ - -#include <math.h> -#include <math_private.h> - -static const long double -tiny = 1.0e-4900L, -zero = 0.0, -pi_o_4 = 7.85398163397448309628202E-01L, /* 0x3FFE, 0xC90FDAA2, 0x2168C235 */ -pi_o_2 = 1.5707963267948966192564E+00L, /* 0x3FFF, 0xC90FDAA2, 0x2168C235 */ -pi = 3.14159265358979323851281E+00L, /* 0x4000, 0xC90FDAA2, 0x2168C235 */ -pi_lo = -5.01655761266833202345176e-20L;/* 0xBFBE, 0xECE675D1, 0xFC8F8CBB */ - -long double -__ieee754_atan2l (long double y, long double x) -{ - long double z; - int32_t k,m,hx,hy,ix,iy; - u_int32_t sx,sy,lx,ly; - - GET_LDOUBLE_WORDS(sx,hx,lx,x); - ix = sx&0x7fff; - lx |= hx & 0x7fffffff; - GET_LDOUBLE_WORDS(sy,hy,ly,y); - iy = sy&0x7fff; - ly |= hy & 0x7fffffff; - if(((2*ix|((lx|-lx)>>31))>0xfffe)|| - ((2*iy|((ly|-ly)>>31))>0xfffe)) /* x or y is NaN */ - return x+y; - if(((sx-0x3fff)|lx)==0) return __atanl(y); /* x=1.0 */ - m = ((sy>>15)&1)|((sx>>14)&2); /* 2*sign(x)+sign(y) */ - - /* when y = 0 */ - if((iy|ly)==0) { - switch(m) { - case 0: - case 1: return y; /* atan(+-0,+anything)=+-0 */ - case 2: return pi+tiny;/* atan(+0,-anything) = pi */ - case 3: return -pi-tiny;/* atan(-0,-anything) =-pi */ - } - } - /* when x = 0 */ - if((ix|lx)==0) return (sy>=0x8000)? -pi_o_2-tiny: pi_o_2+tiny; - - /* when x is INF */ - if(ix==0x7fff) { - if(iy==0x7fff) { - switch(m) { - case 0: return pi_o_4+tiny;/* atan(+INF,+INF) */ - case 1: return -pi_o_4-tiny;/* atan(-INF,+INF) */ - case 2: return 3.0*pi_o_4+tiny;/*atan(+INF,-INF)*/ - case 3: return -3.0*pi_o_4-tiny;/*atan(-INF,-INF)*/ - } - } else { - switch(m) { - case 0: return zero ; /* atan(+...,+INF) */ - case 1: return -zero ; /* atan(-...,+INF) */ - case 2: return pi+tiny ; /* atan(+...,-INF) */ - case 3: return -pi-tiny ; /* atan(-...,-INF) */ - } - } - } - /* when y is INF */ - if(iy==0x7fff) return (sy>=0x8000)? -pi_o_2-tiny: pi_o_2+tiny; - - /* compute y/x */ - k = sy-sx; - if(k > 70) z=pi_o_2+0.5*pi_lo; /* |y/x| > 2**70 */ - else if(sx>=0x8000&&k<-70) z=0.0; /* |y|/x < -2**70 */ - else z=__atanl(fabsl(y/x)); /* safe to do y/x */ - switch (m) { - case 0: return z ; /* atan(+,+) */ - case 1: { - u_int32_t sz; - GET_LDOUBLE_EXP(sz,z); - SET_LDOUBLE_EXP(z,sz ^ 0x8000); - } - return z ; /* atan(-,+) */ - case 2: return pi-(z-pi_lo);/* atan(+,-) */ - default: /* case 3 */ - return (z-pi_lo)-pi;/* atan(-,-) */ - } -} -strong_alias (__ieee754_atan2l, __atan2l_finite) |