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authornsz <nsz@port70.net>2012-03-19 23:41:19 +0100
committernsz <nsz@port70.net>2012-03-19 23:41:19 +0100
commit0cbb65479147ecdaa664e88cc2a5a925f3de502f (patch)
tree7b6dc53fcec6497d55746d3cc47f167a20b7aa57 /src/math/lgammaf_r.c
parentb03255af77776703c8d48819e824d09f6f54ba86 (diff)
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code cleanup of named constants
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).
Diffstat (limited to 'src/math/lgammaf_r.c')
-rw-r--r--src/math/lgammaf_r.c40
1 files changed, 18 insertions, 22 deletions
diff --git a/src/math/lgammaf_r.c b/src/math/lgammaf_r.c
index f1adcf69..976986aa 100644
--- a/src/math/lgammaf_r.c
+++ b/src/math/lgammaf_r.c
@@ -17,8 +17,6 @@
static const float
two23= 8.3886080000e+06, /* 0x4b000000 */
-half= 5.0000000000e-01, /* 0x3f000000 */
-one = 1.0000000000e+00, /* 0x3f800000 */
pi = 3.1415927410e+00, /* 0x40490fdb */
a0 = 7.7215664089e-02, /* 0x3d9e233f */
a1 = 3.2246702909e-01, /* 0x3ea51a66 */
@@ -83,8 +81,6 @@ w4 = -5.9518753551e-04, /* 0xba1c065c */
w5 = 8.3633989561e-04, /* 0x3a5b3dd2 */
w6 = -1.6309292987e-03; /* 0xbad5c4e8 */
-static const float zero = 0.0000000000e+00;
-
static float sin_pif(float x)
{
float y,z;
@@ -109,7 +105,7 @@ static float sin_pif(float x)
n = (int)(y*4.0f);
} else {
if (ix >= 0x4b800000) {
- y = zero; /* y must be even */
+ y = 0.0f; /* y must be even */
n = 0;
} else {
if (ix < 0x4b000000)
@@ -125,7 +121,7 @@ static float sin_pif(float x)
case 1:
case 2: y = __cosdf(pi*(0.5f - y)); break;
case 3:
- case 4: y = __sindf(pi*(one - y)); break;
+ case 4: y = __sindf(pi*(1.0f - y)); break;
case 5:
case 6: y = -__cosdf(pi*(y - 1.5f)); break;
default: y = __sindf(pi*(y - 2.0f)); break;
@@ -148,7 +144,7 @@ float __lgammaf_r(float x, int *signgamp)
if (ix >= 0x7f800000)
return x*x;
if (ix == 0)
- return one/zero;
+ return 1.0f/0.0f;
if (ix < 0x35000000) { /* |x| < 2**-21, return -log(|x|) */
if (hx < 0) {
*signgamp = -1;
@@ -158,12 +154,12 @@ float __lgammaf_r(float x, int *signgamp)
}
if (hx < 0) {
if (ix >= 0x4b000000) /* |x| >= 2**23, must be -integer */
- return one/zero;
+ return 1.0f/0.0f;
t = sin_pif(x);
- if (t == zero) /* -integer */
- return one/zero;
+ if (t == 0.0f) /* -integer */
+ return 1.0f/0.0f;
nadj = logf(pi/fabsf(t*x));
- if (t < zero)
+ if (t < 0.0f)
*signgamp = -1;
x = -x;
}
@@ -176,17 +172,17 @@ float __lgammaf_r(float x, int *signgamp)
if (ix <= 0x3f666666) { /* lgamma(x) = lgamma(x+1)-log(x) */
r = -logf(x);
if (ix >= 0x3f3b4a20) {
- y = one - x;
+ y = 1.0f - x;
i = 0;
} else if (ix >= 0x3e6d3308) {
- y = x - (tc-one);
+ y = x - (tc-1.0f);
i = 1;
} else {
y = x;
i = 2;
}
} else {
- r = zero;
+ r = 0.0f;
if (ix >= 0x3fdda618) { /* [1.7316,2] */
y = 2.0f - x;
i = 0;
@@ -194,7 +190,7 @@ float __lgammaf_r(float x, int *signgamp)
y = x - tc;
i = 1;
} else {
- y = x - one;
+ y = x - 1.0f;
i = 2;
}
}
@@ -217,16 +213,16 @@ float __lgammaf_r(float x, int *signgamp)
break;
case 2:
p1 = y*(u0+y*(u1+y*(u2+y*(u3+y*(u4+y*u5)))));
- p2 = one+y*(v1+y*(v2+y*(v3+y*(v4+y*v5))));
+ p2 = 1.0f+y*(v1+y*(v2+y*(v3+y*(v4+y*v5))));
r += -0.5f*y + p1/p2;
}
} else if (ix < 0x41000000) { /* x < 8.0 */
i = (int)x;
y = x - (float)i;
p = y*(s0+y*(s1+y*(s2+y*(s3+y*(s4+y*(s5+y*s6))))));
- q = one+y*(r1+y*(r2+y*(r3+y*(r4+y*(r5+y*r6)))));
- r = half*y+p/q;
- z = one; /* lgamma(1+s) = log(s) + lgamma(s) */
+ q = 1.0f+y*(r1+y*(r2+y*(r3+y*(r4+y*(r5+y*r6)))));
+ r = 0.5f*y+p/q;
+ z = 1.0f; /* lgamma(1+s) = log(s) + lgamma(s) */
switch (i) {
case 7: z *= y + 6.0f; /* FALLTHRU */
case 6: z *= y + 5.0f; /* FALLTHRU */
@@ -238,12 +234,12 @@ float __lgammaf_r(float x, int *signgamp)
}
} else if (ix < 0x5c800000) { /* 8.0 <= x < 2**58 */
t = logf(x);
- z = one/x;
+ z = 1.0f/x;
y = z*z;
w = w0+z*(w1+y*(w2+y*(w3+y*(w4+y*(w5+y*w6)))));
- r = (x-half)*(t-one)+w;
+ r = (x-0.5f)*(t-1.0f)+w;
} else /* 2**58 <= x <= inf */
- r = x*(logf(x)-one);
+ r = x*(logf(x)-1.0f);
if (hx < 0)
r = nadj - r;
return r;