code cleanup of named constants

[musl] / src / math / lgammaf_r.c

diff --git a/src/math/lgammaf_r.c b/src/math/lgammaf_r.c
index f1adcf6..976986a 100644 (file)
--- 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;