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code cleanup of named constants

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zero, one, two, half are replaced by const literals
The policy was to use the f suffix for float consts (1.0f),
but don't use suffix for long double consts (these consts
can be exactly represented as double).
This commit is contained in:
nsz
2012-03-19 23:41:19 +01:00
parent b03255af77
commit 0cbb654791
73 changed files with 513 additions and 623 deletions
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39
src/math/j0.c
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@ -60,7 +60,6 @@ static double pzero(double), qzero(double);
static const double
huge = 1e300,
one = 1.0,
invsqrtpi = 5.64189583547756279280e-01, /* 0x3FE20DD7, 0x50429B6D */
tpi = 6.36619772367581382433e-01, /* 0x3FE45F30, 0x6DC9C883 */
/* R0/S0 on [0, 2.00] */
@ -73,8 +72,6 @@ S02 = 1.16926784663337450260e-04, /* 0x3F1EA6D2, 0xDD57DBF4 */
S03 = 5.13546550207318111446e-07, /* 0x3EA13B54, 0xCE84D5A9 */
S04 = 1.16614003333790000205e-09; /* 0x3E1408BC, 0xF4745D8F */
static const double zero = 0.0;
double j0(double x)
{
double z, s,c,ss,cc,r,u,v;
@ -83,7 +80,7 @@ double j0(double x)
GET_HIGH_WORD(hx, x);
ix = hx & 0x7fffffff;
if (ix >= 0x7ff00000)
return one/(x*x);
return 1.0/(x*x);
x = fabs(x);
if (ix >= 0x40000000) { /* |x| >= 2.0 */
s = sin(x);
@ -92,7 +89,7 @@ double j0(double x)
cc = s+c;
if (ix < 0x7fe00000) { /* make sure x+x does not overflow */
z = -cos(x+x);
if ((s*c) < zero)
if (s*c < 0.0)
cc = z/ss;
else
ss = z/cc;
@ -112,20 +109,20 @@ double j0(double x)
}
if (ix < 0x3f200000) { /* |x| < 2**-13 */
/* raise inexact if x != 0 */
if (huge+x > one) {
if (huge+x > 1.0) {
if (ix < 0x3e400000) /* |x| < 2**-27 */
return one;
return one - 0.25*x*x;
return 1.0;
return 1.0 - 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)));
s = 1.0+z*(S01+z*(S02+z*(S03+z*S04)));
if (ix < 0x3FF00000) { /* |x| < 1.00 */
return one + z*(-0.25+(r/s));
return 1.0 + z*(-0.25+(r/s));
} else {
u = 0.5*x;
return (one+u)*(one-u) + z*(r/s);
return (1.0+u)*(1.0-u) + z*(r/s);
}
}
@ -151,11 +148,11 @@ double y0(double x)
ix = 0x7fffffff & hx;
/* Y0(NaN) is NaN, y0(-inf) is Nan, y0(inf) is 0 */
if (ix >= 0x7ff00000)
return one/(x+x*x);
return 1.0/(x+x*x);
if ((ix|lx) == 0)
return -one/zero;
return -1.0/0.0;
if (hx < 0)
return zero/zero;
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
@ -178,7 +175,7 @@ double y0(double x)
*/
if (ix < 0x7fe00000) { /* make sure x+x does not overflow */
z = -cos(x+x);
if (s*c < zero)
if (s*c < 0.0)
cc = z/ss;
else
ss = z/cc;
@ -197,7 +194,7 @@ double y0(double 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)));
v = 1.0+z*(v01+z*(v02+z*(v03+z*v04)));
return u/v + tpi*(j0(x)*log(x));
}
@ -286,10 +283,10 @@ static double pzero(double x)
else if (ix >= 0x40122E8B){p = pR5; q = pS5;}
else if (ix >= 0x4006DB6D){p = pR3; q = pS3;}
else if (ix >= 0x40000000){p = pR2; q = pS2;}
z = one/(x*x);
z = 1.0/(x*x);
r = p[0]+z*(p[1]+z*(p[2]+z*(p[3]+z*(p[4]+z*p[5]))));
s = one+z*(q[0]+z*(q[1]+z*(q[2]+z*(q[3]+z*q[4]))));
return one + r/s;
s = 1.0+z*(q[0]+z*(q[1]+z*(q[2]+z*(q[3]+z*q[4]))));
return 1.0 + r/s;
}
@ -382,8 +379,8 @@ static double qzero(double x)
else if (ix >= 0x40122E8B){p = qR5; q = qS5;}
else if (ix >= 0x4006DB6D){p = qR3; q = qS3;}
else if (ix >= 0x40000000){p = qR2; q = qS2;}
z = one/(x*x);
z = 1.0/(x*x);
r = p[0]+z*(p[1]+z*(p[2]+z*(p[3]+z*(p[4]+z*p[5]))));
s = one+z*(q[0]+z*(q[1]+z*(q[2]+z*(q[3]+z*(q[4]+z*q[5])))));
s = 1.0+z*(q[0]+z*(q[1]+z*(q[2]+z*(q[3]+z*(q[4]+z*q[5])))));
return (-.125 + r/s)/x;
}