Esempio n. 1
0
double y0(double x)
{
	double z,s,c,ss,cc,u,v;
	int32_t hx,ix,lx;

	EXTRACT_WORDS(hx, lx, x);
	ix = 0x7fffffff & hx;
	/* Y0(NaN) is NaN, y0(-inf) is Nan, y0(inf) is 0  */
	if (ix >= 0x7ff00000)
		return 1.0/(x+x*x);
	if ((ix|lx) == 0)
		return -1.0/0.0;
	if (hx < 0)
		return 0.0/0.0;
	if (ix >= 0x40000000) {  /* |x| >= 2.0 */
		/* y0(x) = sqrt(2/(pi*x))*(p0(x)*sin(x0)+q0(x)*cos(x0))
		 * where x0 = x-pi/4
		 *      Better formula:
		 *              cos(x0) = cos(x)cos(pi/4)+sin(x)sin(pi/4)
		 *                      =  1/sqrt(2) * (sin(x) + cos(x))
		 *              sin(x0) = sin(x)cos(3pi/4)-cos(x)sin(3pi/4)
		 *                      =  1/sqrt(2) * (sin(x) - cos(x))
		 * To avoid cancellation, use
		 *              sin(x) +- cos(x) = -cos(2x)/(sin(x) -+ cos(x))
		 * to compute the worse one.
		 */
		s = sin(x);
		c = cos(x);
		ss = s-c;
		cc = s+c;
		/*
		 * j0(x) = 1/sqrt(pi) * (P(0,x)*cc - Q(0,x)*ss) / sqrt(x)
		 * y0(x) = 1/sqrt(pi) * (P(0,x)*ss + Q(0,x)*cc) / sqrt(x)
		 */
		if (ix < 0x7fe00000) {  /* make sure x+x does not overflow */
			z = -cos(x+x);
			if (s*c < 0.0)
				cc = z/ss;
			else
				ss = z/cc;
		}
		if (ix > 0x48000000)
			z = (invsqrtpi*ss)/sqrt(x);
		else {
			u = pzero(x);
			v = qzero(x);
			z = invsqrtpi*(u*ss+v*cc)/sqrt(x);
		}
		return z;
	}
	if (ix <= 0x3e400000) {  /* x < 2**-27 */
		return u00 + tpi*log(x);
	}
	z = x*x;
	u = u00+z*(u01+z*(u02+z*(u03+z*(u04+z*(u05+z*u06)))));
	v = 1.0+z*(v01+z*(v02+z*(v03+z*v04)));
	return u/v + tpi*(j0(x)*log(x));
}
Esempio n. 2
0
File: e_j0.c Progetto: gf-chen/glibc
double
__ieee754_j0(double x)
{
	double z, s,c,ss,cc,r,u,v,r1,r2,s1,s2,z2,z4;
	int32_t hx,ix;

	GET_HIGH_WORD(hx,x);
	ix = hx&0x7fffffff;
	if(ix>=0x7ff00000) return one/(x*x);
	x = fabs(x);
	if(ix >= 0x40000000) {	/* |x| >= 2.0 */
		__sincos (x, &s, &c);
		ss = s-c;
		cc = s+c;
		if(ix<0x7fe00000) {  /* make sure x+x not overflow */
		    z = -__cos(x+x);
		    if ((s*c)<zero) cc = z/ss;
		    else	    ss = z/cc;
		}
	/*
	 * j0(x) = 1/sqrt(pi) * (P(0,x)*cc - Q(0,x)*ss) / sqrt(x)
	 * y0(x) = 1/sqrt(pi) * (P(0,x)*ss + Q(0,x)*cc) / sqrt(x)
	 */
		if(ix>0x48000000) z = (invsqrtpi*cc)/__ieee754_sqrt(x);
		else {
		    u = pzero(x); v = qzero(x);
		    z = invsqrtpi*(u*cc-v*ss)/__ieee754_sqrt(x);
		}
		return z;
	}
	if(ix<0x3f200000) {	/* |x| < 2**-13 */
	  math_force_eval(huge+x);	/* raise inexact if x != 0 */
	  if(ix<0x3e400000) return one;	/* |x|<2**-27 */
	  else	      return one - 0.25*x*x;
	}
	z = x*x;
#ifdef DO_NOT_USE_THIS
	r =  z*(R02+z*(R03+z*(R04+z*R05)));
	s =  one+z*(S01+z*(S02+z*(S03+z*S04)));
#else
	r1 = z*R[2]; z2=z*z;
	r2 = R[3]+z*R[4]; z4=z2*z2;
	r  = r1 + z2*r2 + z4*R[5];
	s1 = one+z*S[1];
	s2 = S[2]+z*S[3];
	s = s1 + z2*s2 + z4*S[4];
#endif
	if(ix < 0x3FF00000) {	/* |x| < 1.00 */
	    return one + z*(-0.25+(r/s));
	} else {
	    u = 0.5*x;
	    return((one+u)*(one-u)+z*(r/s));
	}
}
Esempio n. 3
0
double 
j0 (double x)
{
  if (x <= 0.0)
    x = -x;
  if (x < 8.0)
    return jzero(x);
  else
    return (sqrt(TWO_ON_PI/x) 
	    * (pzero(x) * cos (x - PI_ON_FOUR) 
	       - 8.0/x * qzero(x) * sin (x - PI_ON_FOUR)));
}
Esempio n. 4
0
double j0(double x)
{
	double z, s,c,ss,cc,r,u,v;
	int32_t hx,ix;

	GET_HIGH_WORD(hx, x);
	ix = hx & 0x7fffffff;
	if (ix >= 0x7ff00000)
		return 1.0/(x*x);
	x = fabs(x);
	if (ix >= 0x40000000) {  /* |x| >= 2.0 */
		s = sin(x);
		c = cos(x);
		ss = s-c;
		cc = s+c;
		if (ix < 0x7fe00000) {  /* make sure x+x does not overflow */
			z = -cos(x+x);
			if (s*c < 0.0)
				cc = z/ss;
			else
				ss = z/cc;
		}
		/*
		 * j0(x) = 1/sqrt(pi) * (P(0,x)*cc - Q(0,x)*ss) / sqrt(x)
		 * y0(x) = 1/sqrt(pi) * (P(0,x)*ss + Q(0,x)*cc) / sqrt(x)
		 */
		if (ix > 0x48000000)
			z = (invsqrtpi*cc)/sqrt(x);
		else {
			u = pzero(x);
			v = qzero(x);
			z = invsqrtpi*(u*cc-v*ss)/sqrt(x);
		}
		return z;
	}
	if (ix < 0x3f200000) {  /* |x| < 2**-13 */
		/* raise inexact if x != 0 */
		if (huge+x > 1.0) {
			if (ix < 0x3e400000)  /* |x| < 2**-27 */
				return 1.0;
			return 1.0 - 0.25*x*x;
		}
	}
	z = x*x;
	r = z*(R02+z*(R03+z*(R04+z*R05)));
	s = 1.0+z*(S01+z*(S02+z*(S03+z*S04)));
	if (ix < 0x3FF00000) {   /* |x| < 1.00 */
		return 1.0 + z*(-0.25+(r/s));
	} else {
		u = 0.5*x;
		return (1.0+u)*(1.0-u) + z*(r/s);
	}
}
Esempio n. 5
0
        double __ieee754_y0(double x) 
{
        double z, s,c,ss,cc,u,v;
        int hx,ix,lx;

        hx = CYG_LIBM_HI(x);
        ix = 0x7fffffff&hx;
        lx = CYG_LIBM_LO(x);
    /* Y0(NaN) is NaN, y0(-inf) is Nan, y0(inf) is 0  */
        if(ix>=0x7ff00000) return  one/(x+x*x); 
        if((ix|lx)==0) return -one/zero;
        if(hx<0) return zero/zero;
        if(ix >= 0x40000000) {  /* |x| >= 2.0 */
        /* y0(x) = sqrt(2/(pi*x))*(p0(x)*sin(x0)+q0(x)*cos(x0))
         * where x0 = x-pi/4
         *      Better formula:
         *              cos(x0) = cos(x)cos(pi/4)+sin(x)sin(pi/4)
         *                      =  1/sqrt(2) * (sin(x) + cos(x))
         *              sin(x0) = sin(x)cos(3pi/4)-cos(x)sin(3pi/4)
         *                      =  1/sqrt(2) * (sin(x) - cos(x))
         * To avoid cancellation, use
         *              sin(x) +- cos(x) = -cos(2x)/(sin(x) -+ cos(x))
         * to compute the worse one.
         */
                s = sin(x);
                c = cos(x);
                ss = s-c;
                cc = s+c;
        /*
         * j0(x) = 1/sqrt(pi) * (P(0,x)*cc - Q(0,x)*ss) / sqrt(x)
         * y0(x) = 1/sqrt(pi) * (P(0,x)*ss + Q(0,x)*cc) / sqrt(x)
         */
                if(ix<0x7fe00000) {  /* make sure x+x not overflow */
                    z = -cos(x+x);
                    if ((s*c)<zero) cc = z/ss;
                    else            ss = z/cc;
                }
                if(ix>0x48000000) z = (invsqrtpi*ss)/sqrt(x);
                else {
                    u = pzero(x); v = qzero(x);
                    z = invsqrtpi*(u*ss+v*cc)/sqrt(x);
                }
                return z;
        }
        if(ix<=0x3e400000) {    /* x < 2**-27 */
            return(u00 + tpi*__ieee754_log(x));
        }
        z = x*x;
        u = u00+z*(u01+z*(u02+z*(u03+z*(u04+z*(u05+z*u06)))));
        v = one+z*(v01+z*(v02+z*(v03+z*v04)));
        return(u/v + tpi*(__ieee754_j0(x)*__ieee754_log(x)));
}
Esempio n. 6
0
File: w_j0.c Progetto: JOogway/liero
double fd_y0(double x)		/* wrapper fd_y0 */
{
	double z, s,c,ss,cc,u,v;
	int hx,ix,lx;

        hx = FD_HI(x);
        ix = 0x7fffffff&hx;
        lx = FD_LO(x);
    /* Y0(NaN) is NaN, fd_y0(-inf) is Nan, fd_y0(inf) is 0  */
	if(ix>=0x7ff00000) return gD( one, gA(x, gM(x,x)));
        if((ix|lx)==0) return gD(-one, zero);
        if(hx<0) return gD(zero,zero);
        if(ix >= 0x40000000) {  /* |x| >= 2.0 */
        /* fd_y0(x) = fd_sqrt(2/(pi*x))*(p0(x)*fd_sin(x0)+q0(x)*fd_cos(x0))
         * where x0 = x-pi/4
         *      Better formula:
         *              fd_cos(x0) = fd_cos(x)fd_cos(pi/4)+fd_sin(x)fd_sin(pi/4)
         *                      =  1/fd_sqrt(2) * (fd_sin(x) + fd_cos(x))
         *              fd_sin(x0) = fd_sin(x)fd_cos(3pi/4)-fd_cos(x)fd_sin(3pi/4)
         *                      =  1/fd_sqrt(2) * (fd_sin(x) - fd_cos(x))
         * To avoid cancellation, use
         *              fd_sin(x) +- fd_cos(x) = -fd_cos(2x)/(fd_sin(x) -+ fd_cos(x))
         * to compute the worse one.
         */
                s = fd_sin(x);
                c = fd_cos(x);
                ss = gS(s,c);
                cc = gA(s,c);
	/*
	 * fd_j0(x) = 1/fd_sqrt(pi) * (P(0,x)*cc - Q(0,x)*ss) / fd_sqrt(x)
	 * fd_y0(x) = 1/fd_sqrt(pi) * (P(0,x)*ss + Q(0,x)*cc) / fd_sqrt(x)
	 */
                if(ix<0x7fe00000) {  /* make sure x+x not overflow */
                    z = -fd_cos(gA(x,x));
                    if (gM(s,c) < zero) cc = gD(z,ss);
                    else            ss = gD(z,cc);
                }
                if(ix>0x48000000) z = gD(gM(invsqrtpi,ss), gSqrt(x));
                else {
                    u = pzero(x); v = qzero(x);
                    z = gD(gM(invsqrtpi, gA(gM(u,ss), gM(v,cc))), gSqrt(x));
                }
                return z;
	}
	if(ix<=0x3e400000) {	/* x < 2**-27 */
	    return gA(u00, gM(tpi, fd_log(x)));
	}
	z = gM(x,x);
	u = gA(u00, gM(z,gA(u01, gM(z,gA(u02, gM(z,gA(u03, gM(z,gA(u04, gM(z,gA(u05, gM(z,u06))))))))))));
	v = gA(one, gM(z,gA(v01, gM(z,gA(v02, gM(z,gA(v03, gM(z,v04))))))));
	return(gD(u,v) + gM(tpi,gM(fd_j0(x), fd_log(x))));
}
Esempio n. 7
0
double 
y0 (double x)
{
  if (x < 0.0)
    return (dzero/dzero);	/* IEEE machines: invalid operation */
  if (x < 8.0)
    return yzero(x) + TWO_ON_PI * j0(x) * log(x);
  else
    return (sqrt (TWO_ON_PI/x) 
	    * (pzero(x) * sin (x - PI_ON_FOUR) 
	       + (8.0/x) * qzero(x) * cos(x - PI_ON_FOUR)));

}
Esempio n. 8
0
        double __ieee754_j0(double x) 
{
        double z, s,c,ss,cc,r,u,v;
        int hx,ix;

        hx = CYG_LIBM_HI(x);
        ix = hx&0x7fffffff;
        if(ix>=0x7ff00000) return one/(x*x);
        x = fabs(x);
        if(ix >= 0x40000000) {  /* |x| >= 2.0 */
                s = sin(x);
                c = cos(x);
                ss = s-c;
                cc = s+c;
                if(ix<0x7fe00000) {  /* make sure x+x not overflow */
                    z = -cos(x+x);
                    if ((s*c)<zero) cc = z/ss;
                    else            ss = z/cc;
                }
        /*
         * j0(x) = 1/sqrt(pi) * (P(0,x)*cc - Q(0,x)*ss) / sqrt(x)
         * y0(x) = 1/sqrt(pi) * (P(0,x)*ss + Q(0,x)*cc) / sqrt(x)
         */
                if(ix>0x48000000) z = (invsqrtpi*cc)/sqrt(x);
                else {
                    u = pzero(x); v = qzero(x);
                    z = invsqrtpi*(u*cc-v*ss)/sqrt(x);
                }
                return z;
        }
        if(ix<0x3f200000) {     /* |x| < 2**-13 */
            if(huge+x>one) {    /* raise inexact if x != 0 */
                if(ix<0x3e400000) return one;   /* |x|<2**-27 */
                else          return one - 0.25*x*x;
            }
        }
        z = x*x;
        r =  z*(R02+z*(R03+z*(R04+z*R05)));
        s =  one+z*(S01+z*(S02+z*(S03+z*S04)));
        if(ix < 0x3FF00000) {   /* |x| < 1.00 */
            return one + z*(-0.25+(r/s));
        } else {
            u = 0.5*x;
            return((one+u)*(one-u)+z*(r/s));
        }
}
Esempio n. 9
0
File: w_j0.c Progetto: JOogway/liero
double fd_j0(double x)		/* wrapper fd_j0 */
{
	double z, s,c,ss,cc,r,u,v;
	int hx,ix;

	hx = FD_HI(x);
	ix = hx&0x7fffffff;
	if(ix>=0x7ff00000) return gD(one, gM(x,x));
	x = fd_fabs(x);
	if(ix >= 0x40000000) {	/* |x| >= 2.0 */
		s = fd_sin(x);
		c = fd_cos(x);
		ss = gS(s,c);
		cc = gA(s,c);
		if(ix<0x7fe00000) {  /* make sure x+x not overflow */
		    z = -fd_cos(gA(x,x));
		    if (gM(s,c) < zero) cc = gD(z,ss);
		    else 	    ss = gD(z,cc);
		}
	/*
	 * fd_j0(x) = 1/fd_sqrt(pi) * (P(0,x)*cc - Q(0,x)*ss) / fd_sqrt(x)
	 * fd_y0(x) = 1/fd_sqrt(pi) * (P(0,x)*ss + Q(0,x)*cc) / fd_sqrt(x)
	 */
		if(ix>0x48000000) z = gD(gM(invsqrtpi,cc),gSqrt(x));
		else {
		    u = pzero(x); v = qzero(x);
		    z = gD(gM(invsqrtpi, (gS(gM(u,cc), gM(v,ss)))), gSqrt(x));
		}
		return z;
	}
	if(ix<0x3f200000) {	/* |x| < 2**-13 */
	    if(huge+x>one) {	/* raise inexact if x != 0 */
	        if(ix<0x3e400000) return one;	/* |x|<2**-27 */
	        else 	      return gS(one, gM(gM(0.25,x),x));
	    }
	}
	z = gM(x,x);
	r = gM(z,gA(R02, gM(z,gA(R03, gM(z,gA(R04, gM(z,R05)))))));
	s = gA(one, gM(z,gA(S01, gM(z,gA(S02, gM(z,gA(S03, gM(z,S04))))))));
	if(ix < 0x3FF00000) {	/* |x| < 1.00 */
	    return gA(one, gM(z,gA(-0.25,gD(r,s))));
	} else {
	    u = gM(0.5,x);
	    return(gM(gA(one, u), gS(one, u)) + gM(z, gD(r,s)));
	}
}
Esempio n. 10
0
File: e_j0.c Progetto: gf-chen/glibc
double
__ieee754_y0(double x)
{
	double z, s,c,ss,cc,u,v,z2,z4,z6,u1,u2,u3,v1,v2;
	int32_t hx,ix,lx;

	EXTRACT_WORDS(hx,lx,x);
	ix = 0x7fffffff&hx;
    /* Y0(NaN) is NaN, y0(-inf) is Nan, y0(inf) is 0, y0(0) is -inf.  */
	if(ix>=0x7ff00000) return  one/(x+x*x);
	if((ix|lx)==0) return -HUGE_VAL+x; /* -inf and overflow exception.  */
	if(hx<0) return zero/(zero*x);
	if(ix >= 0x40000000) {  /* |x| >= 2.0 */
	/* y0(x) = sqrt(2/(pi*x))*(p0(x)*sin(x0)+q0(x)*cos(x0))
	 * where x0 = x-pi/4
	 *      Better formula:
	 *              cos(x0) = cos(x)cos(pi/4)+sin(x)sin(pi/4)
	 *                      =  1/sqrt(2) * (sin(x) + cos(x))
	 *              sin(x0) = sin(x)cos(3pi/4)-cos(x)sin(3pi/4)
	 *                      =  1/sqrt(2) * (sin(x) - cos(x))
	 * To avoid cancellation, use
	 *              sin(x) +- cos(x) = -cos(2x)/(sin(x) -+ cos(x))
	 * to compute the worse one.
	 */
		__sincos (x, &s, &c);
		ss = s-c;
		cc = s+c;
	/*
	 * j0(x) = 1/sqrt(pi) * (P(0,x)*cc - Q(0,x)*ss) / sqrt(x)
	 * y0(x) = 1/sqrt(pi) * (P(0,x)*ss + Q(0,x)*cc) / sqrt(x)
	 */
		if(ix<0x7fe00000) {  /* make sure x+x not overflow */
		    z = -__cos(x+x);
		    if ((s*c)<zero) cc = z/ss;
		    else            ss = z/cc;
		}
		if(ix>0x48000000) z = (invsqrtpi*ss)/__ieee754_sqrt(x);
		else {
		    u = pzero(x); v = qzero(x);
		    z = invsqrtpi*(u*ss+v*cc)/__ieee754_sqrt(x);
		}
		return z;
	}
	if(ix<=0x3e400000) {	/* x < 2**-27 */
	    return(U[0] + tpi*__ieee754_log(x));
	}
	z = x*x;
#ifdef DO_NOT_USE_THIS
	u = u00+z*(u01+z*(u02+z*(u03+z*(u04+z*(u05+z*u06)))));
	v = one+z*(v01+z*(v02+z*(v03+z*v04)));
#else
	u1 = U[0]+z*U[1]; z2=z*z;
	u2 = U[2]+z*U[3]; z4=z2*z2;
	u3 = U[4]+z*U[5]; z6=z4*z2;
	u = u1 + z2*u2 + z4*u3 + z6*U[6];
	v1 = one+z*V[0];
	v2 = V[1]+z*V[2];
	v = v1 + z2*v2 + z4*V[3];
#endif
	return(u/v + tpi*(__ieee754_j0(x)*__ieee754_log(x)));
}
Esempio n. 11
0
GENERIC
j0(GENERIC x) {
	GENERIC z, s, c, ss, cc, r, u, v, ox;
	int i;

	if (isnan(x))
		return (x*x);	/* + -> * for Cheetah */
	ox = x;
	x = fabs(x);
	if (x > 8.0) {
		if (!finite(x))
			return (zero);
		s = sin(x);
		c = cos(x);
	/*
	 * j0(x) = sqrt(2/(pi*x))*(p0(x)*cos(x0)-q0(x)*sin(x0))
	 * where x0 = x-pi/4
	 * 	Better formula:
	 *		cos(x0) = cos(x)cos(pi/4)+sin(x)sin(pi/4)
	 *			= 1/sqrt(2) * (cos(x) + sin(x))
	 *		sin(x0) = sin(x)cos(pi/4)-cos(x)sin(pi/4)
	 *			= 1/sqrt(2) * (sin(x) - cos(x))
	 * To avoid cancellation, use
	 *		sin(x) +- cos(x) = -cos(2x)/(sin(x) -+ cos(x))
	 * to compute the worse one.
	 */
		if (x > 8.9e307) {	/* x+x may overflow */
			ss = s-c;
			cc = s+c;
		} else if (signbit(s) != signbit(c)) {
			ss = s - c;
			cc = -cos(x+x)/ss;
		} else {
			cc = s + c;
			ss = -cos(x+x)/cc;
		}
	/*
	 * j0(x) = 1/sqrt(pi) * (P(0,x)*cc - Q(0,x)*ss) / sqrt(x)
	 * y0(x) = 1/sqrt(pi) * (P(0,x)*ss + Q(0,x)*cc) / sqrt(x)
	 */
		if (x > 1.0e40) z = (invsqrtpi*cc)/sqrt(x);
		else {
		    u = pzero(x); v = qzero(x);
		    z = invsqrtpi*(u*cc-v*ss)/sqrt(x);
		}
	/* force to pass SVR4 even the result is wrong (sign) */
		if (x > X_TLOSS)
		    return (_SVID_libm_err(ox, z, 34));
		else
		    return (z);
	}
	if (x <= small) {
	    if (x <= tiny)
			return (one-x);
	    else
			return (one-x*x*0.25);
	}
	z = x*x;
	if (x <= 1.28) {
	    r =  r0[0]+z*(r0[1]+z*(r0[2]+z*r0[3]));
	    s =  s0[0]+z*(s0[1]+z*(s0[2]+z*s0[3]));
	    return (one + z*(r/s));
	} else {
	    for (r = r1[8], s = s1[8], i = 7; i >= 0; i--) {
		r = r*z + r1[i];
		s = s*z + s1[i];
	    }
	    return (r/s);
	}
}
Esempio n. 12
0
GENERIC
y0(GENERIC x) {
	GENERIC z, /* d, */ s, c, ss, cc, u, v;
	int i;

	if (isnan(x))
		return (x*x);	/* + -> * for Cheetah */
	if (x <= zero) {
		if (x == zero)
		    /* d= -one/(x-x); */
		    return (_SVID_libm_err(x, x, 8));
		else
		    /* d = zero/(x-x); */
		    return (_SVID_libm_err(x, x, 9));
	}
	if (x > 8.0) {
		if (!finite(x))
			return (zero);
		s = sin(x);
		c = cos(x);
	/*
	 * j0(x) = sqrt(2/(pi*x))*(p0(x)*cos(x0)-q0(x)*sin(x0))
	 * where x0 = x-pi/4
	 * 	Better formula:
	 *		cos(x0) = cos(x)cos(pi/4)+sin(x)sin(pi/4)
	 *			= 1/sqrt(2) * (cos(x) + sin(x))
	 *		sin(x0) = sin(x)cos(pi/4)-cos(x)sin(pi/4)
	 *			= 1/sqrt(2) * (sin(x) - cos(x))
	 * To avoid cancellation, use
	 *		sin(x) +- cos(x) = -cos(2x)/(sin(x) -+ cos(x))
	 * to compute the worse one.
	 */
		if (x > 8.9e307) {	/* x+x may overflow */
			ss = s-c;
			cc = s+c;
		} else if (signbit(s) != signbit(c)) {
			ss = s - c;
			cc = -cos(x+x)/ss;
		} else {
			cc = s + c;
			ss = -cos(x+x)/cc;
		}
	/*
	 * j0(x) = 1/sqrt(pi*x) * (P(0,x)*cc - Q(0,x)*ss)
	 * y0(x) = 1/sqrt(pi*x) * (P(0,x)*ss + Q(0,x)*cc)
	 */
		if (x > 1.0e40)
		    z = (invsqrtpi*ss)/sqrt(x);
		else
		    z =  invsqrtpi*(pzero(x)*ss+qzero(x)*cc)/sqrt(x);
		if (x > X_TLOSS)
		    return (_SVID_libm_err(x, z, 35));
		else
		    return (z);

	}
	if (x <= tiny) {
	    return (u0[0] + tpi*log(x));
	}
	z = x*x;
	for (u = u0[12], i = 11; i >= 0; i--) u = u*z + u0[i];
	v = v0[0]+z*(v0[1]+z*(v0[2]+z*(v0[3]+z*v0[4])));
	return (u/v + tpi*(j0(x)*log(x)));
}
Esempio n. 13
0
int
main(int argc, char** argv)
{
	if (argc < 2)
	{
		std::cout << "Usage: rlInverseKinematicsTest KINEMATICSFILE" << std::endl;
		return 1;
	}
	
	try
	{
		std::srand(0); // get reproducible results
		
		rl::kin::Kinematics* kinematics = static_cast< ::rl::kin::Kinematics* >(rl::kin::Kinematics::create(argv[1]));		
		
		std::size_t nTests;
		
		rl::math::Vector q(6);
		rl::math::Vector qinv(6);
		rl::math::Vector qzero(6);
		std::size_t n;
		std::size_t wrongs;
		std::size_t wrongT;
		std::size_t ngotinverse;
		
		for (std::size_t ispuma = 0; ispuma < 2; ++ispuma)
		{
			nTests = 0 == ispuma ? 1000 : 100;
			
			for (n = 0, wrongs = 0, wrongT = 0, ngotinverse = 0; n < nTests && wrongT < 100 && wrongs < 100; ++n)
			{
				for (std::size_t i = 0; i < 6; ++i)
				{
					rl::math::Real r = static_cast< rl::math::Real >(std::rand()) / static_cast< rl::math::Real >(RAND_MAX); 
					q(i) = (r - 0.5) * 360 * rl::math::DEG2RAD;
					qzero(i) = 0;
				}
				
				kinematics->setPosition(q);
				kinematics->updateFrames();
				
				rl::math::Transform t = kinematics->forwardPosition();
				
				// For iterative inverse, set starting point far away
				kinematics->setPosition(qzero);
				kinematics->updateFrames();
				
				if (0 == ispuma)
				{
					rl::kin::Puma::Arm arm;
					rl::kin::Puma::Elbow elbow;
					rl::kin::Puma::Wrist wrist;
					dynamic_cast< rl::kin::Puma* >(kinematics)->parameters(q, arm, elbow, wrist);
					dynamic_cast< rl::kin::Puma* >(kinematics)->setArm(arm);
					dynamic_cast< rl::kin::Puma* >(kinematics)->setElbow(elbow);
					dynamic_cast< rl::kin::Puma* >(kinematics)->setWrist(wrist);
				}
				
				if (
					0 == ispuma
					? dynamic_cast< ::rl::kin::Puma* >(kinematics)->inversePosition(t, qinv)
					: dynamic_cast< ::rl::kin::Kinematics* >(kinematics)->inversePosition(t, qinv, 0, 100)
				)
				{
					kinematics->setPosition(qinv);
					kinematics->updateFrames();
					rl::math::Transform tinv = kinematics->forwardPosition();
					
					if ((t.matrix() - tinv.matrix()).norm() > 1e-6)
					{
						++wrongT;
					}
					
					if ((q - qinv).norm() > 1e-4)
					{
						++wrongs;
					}
					
					if (wrongT < 3 && (t.matrix() - tinv.matrix()).norm() > 1e-6)
					{
						std::cout << "      q    = " << q.transpose() << std::endl;
						std::cout << "      T    = " << t.matrix() << std::endl;
						std::cout << "      qinv = " << qinv.transpose() << std::endl;
						std::cout << "Wrong Tinv = " << tinv.matrix() << std::endl;
						std::cout << std::endl;
					}
					
					++ngotinverse;
				}
			}
			
			std::cout << "Notice: "
				<< (0 == ispuma ? "Puma direct " : "Iterative ") << "inverse kinematics "
				<< "on file " << argv[1] << " "
				<< "tested with " << n << " cases, "
				<< ngotinverse << " returned a solution, "
				<< "thereof " << wrongs << " in wrong configuration, and "
				<< wrongT << " with completely wrong pose."
				<< std::endl;
			
			if (wrongT > 0)
			{
				std::cerr << "Error: "
					<< (0 == ispuma ? "Puma direct " : "Iterative ") 
					<< "inverse kinematics " << "on file " << argv[1] 
					<< " gave incorrect poses." << std::endl;
				return 1;
			}
			
			if (0 == ngotinverse)
			{
				std::cerr << "Error: "
					<< (0 == ispuma ? "Puma direct " : "Iterative ") 
					<< "inverse kinematics "<< "on file " << argv[1]
					<< " gave no solutions."
					<< std::endl;
				return 1;
			}
		}
	}
	catch (const std::exception& e)
	{
		std::cerr << e.what() << std::endl;
		return 1;
	}
	
	return 0;
}