[fusl] clang-format fusl

fusl/src/math/lgammaf_r.c

 /* origin: FreeBSD /usr/src/lib/msun/src/e_lgammaf_r.c */
 /*
  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@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.
  * ====================================================
  */
 
 #include "libm.h"
 #include "libc.h"
 
-static const float
-pi  =  3.1415927410e+00, /* 0x40490fdb */
-a0  =  7.7215664089e-02, /* 0x3d9e233f */
-a1  =  3.2246702909e-01, /* 0x3ea51a66 */
-a2  =  6.7352302372e-02, /* 0x3d89f001 */
-a3  =  2.0580807701e-02, /* 0x3ca89915 */
-a4  =  7.3855509982e-03, /* 0x3bf2027e */
-a5  =  2.8905137442e-03, /* 0x3b3d6ec6 */
-a6  =  1.1927076848e-03, /* 0x3a9c54a1 */
-a7  =  5.1006977446e-04, /* 0x3a05b634 */
-a8  =  2.2086278477e-04, /* 0x39679767 */
-a9  =  1.0801156895e-04, /* 0x38e28445 */
-a10 =  2.5214456400e-05, /* 0x37d383a2 */
-a11 =  4.4864096708e-05, /* 0x383c2c75 */
-tc  =  1.4616321325e+00, /* 0x3fbb16c3 */
-tf  = -1.2148628384e-01, /* 0xbdf8cdcd */
-/* tt = -(tail of tf) */
-tt  =  6.6971006518e-09, /* 0x31e61c52 */
-t0  =  4.8383611441e-01, /* 0x3ef7b95e */
-t1  = -1.4758771658e-01, /* 0xbe17213c */
-t2  =  6.4624942839e-02, /* 0x3d845a15 */
-t3  = -3.2788541168e-02, /* 0xbd064d47 */
-t4  =  1.7970675603e-02, /* 0x3c93373d */
-t5  = -1.0314224288e-02, /* 0xbc28fcfe */
-t6  =  6.1005386524e-03, /* 0x3bc7e707 */
-t7  = -3.6845202558e-03, /* 0xbb7177fe */
-t8  =  2.2596477065e-03, /* 0x3b141699 */
-t9  = -1.4034647029e-03, /* 0xbab7f476 */
-t10 =  8.8108185446e-04, /* 0x3a66f867 */
-t11 = -5.3859531181e-04, /* 0xba0d3085 */
-t12 =  3.1563205994e-04, /* 0x39a57b6b */
-t13 = -3.1275415677e-04, /* 0xb9a3f927 */
-t14 =  3.3552918467e-04, /* 0x39afe9f7 */
-u0  = -7.7215664089e-02, /* 0xbd9e233f */
-u1  =  6.3282704353e-01, /* 0x3f2200f4 */
-u2  =  1.4549225569e+00, /* 0x3fba3ae7 */
-u3  =  9.7771751881e-01, /* 0x3f7a4bb2 */
-u4  =  2.2896373272e-01, /* 0x3e6a7578 */
-u5  =  1.3381091878e-02, /* 0x3c5b3c5e */
-v1  =  2.4559779167e+00, /* 0x401d2ebe */
-v2  =  2.1284897327e+00, /* 0x4008392d */
-v3  =  7.6928514242e-01, /* 0x3f44efdf */
-v4  =  1.0422264785e-01, /* 0x3dd572af */
-v5  =  3.2170924824e-03, /* 0x3b52d5db */
-s0  = -7.7215664089e-02, /* 0xbd9e233f */
-s1  =  2.1498242021e-01, /* 0x3e5c245a */
-s2  =  3.2577878237e-01, /* 0x3ea6cc7a */
-s3  =  1.4635047317e-01, /* 0x3e15dce6 */
-s4  =  2.6642270386e-02, /* 0x3cda40e4 */
-s5  =  1.8402845599e-03, /* 0x3af135b4 */
-s6  =  3.1947532989e-05, /* 0x3805ff67 */
-r1  =  1.3920053244e+00, /* 0x3fb22d3b */
-r2  =  7.2193557024e-01, /* 0x3f38d0c5 */
-r3  =  1.7193385959e-01, /* 0x3e300f6e */
-r4  =  1.8645919859e-02, /* 0x3c98bf54 */
-r5  =  7.7794247773e-04, /* 0x3a4beed6 */
-r6  =  7.3266842264e-06, /* 0x36f5d7bd */
-w0  =  4.1893854737e-01, /* 0x3ed67f1d */
-w1  =  8.3333335817e-02, /* 0x3daaaaab */
-w2  = -2.7777778450e-03, /* 0xbb360b61 */
-w3  =  7.9365057172e-04, /* 0x3a500cfd */
-w4  = -5.9518753551e-04, /* 0xba1c065c */
-w5  =  8.3633989561e-04, /* 0x3a5b3dd2 */
-w6  = -1.6309292987e-03; /* 0xbad5c4e8 */
+static const float pi = 3.1415927410e+00, /* 0x40490fdb */
+    a0 = 7.7215664089e-02,                /* 0x3d9e233f */
+    a1 = 3.2246702909e-01,                /* 0x3ea51a66 */
+    a2 = 6.7352302372e-02,                /* 0x3d89f001 */
+    a3 = 2.0580807701e-02,                /* 0x3ca89915 */
+    a4 = 7.3855509982e-03,                /* 0x3bf2027e */
+    a5 = 2.8905137442e-03,                /* 0x3b3d6ec6 */
+    a6 = 1.1927076848e-03,                /* 0x3a9c54a1 */
+    a7 = 5.1006977446e-04,                /* 0x3a05b634 */
+    a8 = 2.2086278477e-04,                /* 0x39679767 */
+    a9 = 1.0801156895e-04,                /* 0x38e28445 */
+    a10 = 2.5214456400e-05,               /* 0x37d383a2 */
+    a11 = 4.4864096708e-05,               /* 0x383c2c75 */
+    tc = 1.4616321325e+00,                /* 0x3fbb16c3 */
+    tf = -1.2148628384e-01,               /* 0xbdf8cdcd */
+    /* tt = -(tail of tf) */
+    tt = 6.6971006518e-09,   /* 0x31e61c52 */
+    t0 = 4.8383611441e-01,   /* 0x3ef7b95e */
+    t1 = -1.4758771658e-01,  /* 0xbe17213c */
+    t2 = 6.4624942839e-02,   /* 0x3d845a15 */
+    t3 = -3.2788541168e-02,  /* 0xbd064d47 */
+    t4 = 1.7970675603e-02,   /* 0x3c93373d */
+    t5 = -1.0314224288e-02,  /* 0xbc28fcfe */
+    t6 = 6.1005386524e-03,   /* 0x3bc7e707 */
+    t7 = -3.6845202558e-03,  /* 0xbb7177fe */
+    t8 = 2.2596477065e-03,   /* 0x3b141699 */
+    t9 = -1.4034647029e-03,  /* 0xbab7f476 */
+    t10 = 8.8108185446e-04,  /* 0x3a66f867 */
+    t11 = -5.3859531181e-04, /* 0xba0d3085 */
+    t12 = 3.1563205994e-04,  /* 0x39a57b6b */
+    t13 = -3.1275415677e-04, /* 0xb9a3f927 */
+    t14 = 3.3552918467e-04,  /* 0x39afe9f7 */
+    u0 = -7.7215664089e-02,  /* 0xbd9e233f */
+    u1 = 6.3282704353e-01,   /* 0x3f2200f4 */
+    u2 = 1.4549225569e+00,   /* 0x3fba3ae7 */
+    u3 = 9.7771751881e-01,   /* 0x3f7a4bb2 */
+    u4 = 2.2896373272e-01,   /* 0x3e6a7578 */
+    u5 = 1.3381091878e-02,   /* 0x3c5b3c5e */
+    v1 = 2.4559779167e+00,   /* 0x401d2ebe */
+    v2 = 2.1284897327e+00,   /* 0x4008392d */
+    v3 = 7.6928514242e-01,   /* 0x3f44efdf */
+    v4 = 1.0422264785e-01,   /* 0x3dd572af */
+    v5 = 3.2170924824e-03,   /* 0x3b52d5db */
+    s0 = -7.7215664089e-02,  /* 0xbd9e233f */
+    s1 = 2.1498242021e-01,   /* 0x3e5c245a */
+    s2 = 3.2577878237e-01,   /* 0x3ea6cc7a */
+    s3 = 1.4635047317e-01,   /* 0x3e15dce6 */
+    s4 = 2.6642270386e-02,   /* 0x3cda40e4 */
+    s5 = 1.8402845599e-03,   /* 0x3af135b4 */
+    s6 = 3.1947532989e-05,   /* 0x3805ff67 */
+    r1 = 1.3920053244e+00,   /* 0x3fb22d3b */
+    r2 = 7.2193557024e-01,   /* 0x3f38d0c5 */
+    r3 = 1.7193385959e-01,   /* 0x3e300f6e */
+    r4 = 1.8645919859e-02,   /* 0x3c98bf54 */
+    r5 = 7.7794247773e-04,   /* 0x3a4beed6 */
+    r6 = 7.3266842264e-06,   /* 0x36f5d7bd */
+    w0 = 4.1893854737e-01,   /* 0x3ed67f1d */
+    w1 = 8.3333335817e-02,   /* 0x3daaaaab */
+    w2 = -2.7777778450e-03,  /* 0xbb360b61 */
+    w3 = 7.9365057172e-04,   /* 0x3a500cfd */
+    w4 = -5.9518753551e-04,  /* 0xba1c065c */
+    w5 = 8.3633989561e-04,   /* 0x3a5b3dd2 */
+    w6 = -1.6309292987e-03;  /* 0xbad5c4e8 */
 
 /* sin(pi*x) assuming x > 2^-100, if sin(pi*x)==0 the sign is arbitrary */
-static float sin_pi(float x)
-{
-        double_t y;
-        int n;
-
-        /* spurious inexact if odd int */
-        x = 2*(x*0.5f - floorf(x*0.5f));  /* x mod 2.0 */
-
-        n = (int)(x*4);
-        n = (n+1)/2;
-        y = x - n*0.5f;
-        y *= 3.14159265358979323846;
-        switch (n) {
-        default: /* case 4: */
-        case 0: return __sindf(y);
-        case 1: return __cosdf(y);
-        case 2: return __sindf(-y);
-        case 3: return -__cosdf(y);
-        }
+static float sin_pi(float x) {
+  double_t y;
+  int n;
+
+  /* spurious inexact if odd int */
+  x = 2 * (x * 0.5f - floorf(x * 0.5f)); /* x mod 2.0 */
+
+  n = (int)(x * 4);
+  n = (n + 1) / 2;
+  y = x - n * 0.5f;
+  y *= 3.14159265358979323846;
+  switch (n) {
+    default: /* case 4: */
+    case 0:
+      return __sindf(y);
+    case 1:
+      return __cosdf(y);
+    case 2:
+      return __sindf(-y);
+    case 3:
+      return -__cosdf(y);
+  }
 }
 
-float __lgammaf_r(float x, int *signgamp)
-{
-        union {float f; uint32_t i;} u = {x};
-        float t,y,z,nadj,p,p1,p2,p3,q,r,w;
-        uint32_t ix;
-        int i,sign;
-
-        /* purge off +-inf, NaN, +-0, tiny and negative arguments */
-        *signgamp = 1;
-        sign = u.i>>31;
-        ix = u.i & 0x7fffffff;
-        if (ix >= 0x7f800000)
-                return x*x;
-        if (ix < 0x35000000) {  /* |x| < 2**-21, return -log(|x|) */
-                if (sign) {
-                        *signgamp = -1;
-                        x = -x;
-                }
-                return -logf(x);
-        }
-        if (sign) {
-                x = -x;
-                t = sin_pi(x);
-                if (t == 0.0f) /* -integer */
-                        return 1.0f/(x-x);
-                if (t > 0.0f)
-                        *signgamp = -1;
-                else
-                        t = -t;
-                nadj = logf(pi/(t*x));
-        }
-
-        /* purge off 1 and 2 */
-        if (ix == 0x3f800000 || ix == 0x40000000)
-                r = 0;
-        /* for x < 2.0 */
-        else if (ix < 0x40000000) {
-                if (ix <= 0x3f666666) {  /* lgamma(x) = lgamma(x+1)-log(x) */
-                        r = -logf(x);
-                        if (ix >= 0x3f3b4a20) {
-                                y = 1.0f - x;
-                                i = 0;
-                        } else if (ix >= 0x3e6d3308) {
-                                y = x - (tc-1.0f);
-                                i = 1;
-                        } else {
-                                y = x;
-                                i = 2;
-                        }
-                } else {
-                        r = 0.0f;
-                        if (ix >= 0x3fdda618) {  /* [1.7316,2] */
-                                y = 2.0f - x;
-                                i = 0;
-                        } else if (ix >= 0x3F9da620) {  /* [1.23,1.73] */
-                                y = x - tc;
-                                i = 1;
-                        } else {
-                                y = x - 1.0f;
-                                i = 2;
-                        }
-                }
-                switch(i) {
-                case 0:
-                        z = y*y;
-                        p1 = a0+z*(a2+z*(a4+z*(a6+z*(a8+z*a10))));
-                        p2 = z*(a1+z*(a3+z*(a5+z*(a7+z*(a9+z*a11)))));
-                        p = y*p1+p2;
-                        r += p - 0.5f*y;
-                        break;
-                case 1:
-                        z = y*y;
-                        w = z*y;
-                        p1 = t0+w*(t3+w*(t6+w*(t9 +w*t12)));    /* parallel comp */
-                        p2 = t1+w*(t4+w*(t7+w*(t10+w*t13)));
-                        p3 = t2+w*(t5+w*(t8+w*(t11+w*t14)));
-                        p = z*p1-(tt-w*(p2+y*p3));
-                        r += (tf + p);
-                        break;
-                case 2:
-                        p1 = y*(u0+y*(u1+y*(u2+y*(u3+y*(u4+y*u5)))));
-                        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 = 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 */
-                case 5: z *= y + 4.0f;  /* FALLTHRU */
-                case 4: z *= y + 3.0f;  /* FALLTHRU */
-                case 3: z *= y + 2.0f;  /* FALLTHRU */
-                        r += logf(z);
-                        break;
-                }
-        } else if (ix < 0x5c800000) {  /* 8.0 <= x < 2**58 */
-                t = logf(x);
-                z = 1.0f/x;
-                y = z*z;
-                w = w0+z*(w1+y*(w2+y*(w3+y*(w4+y*(w5+y*w6)))));
-                r = (x-0.5f)*(t-1.0f)+w;
-        } else                         /* 2**58 <= x <= inf */
-                r =  x*(logf(x)-1.0f);
-        if (sign)
-                r = nadj - r;
-        return r;
+float __lgammaf_r(float x, int* signgamp) {
+  union {
+    float f;
+    uint32_t i;
+  } u = {x};
+  float t, y, z, nadj, p, p1, p2, p3, q, r, w;
+  uint32_t ix;
+  int i, sign;
+
+  /* purge off +-inf, NaN, +-0, tiny and negative arguments */
+  *signgamp = 1;
+  sign = u.i >> 31;
+  ix = u.i & 0x7fffffff;
+  if (ix >= 0x7f800000)
+    return x * x;
+  if (ix < 0x35000000) { /* |x| < 2**-21, return -log(|x|) */
+    if (sign) {
+      *signgamp = -1;
+      x = -x;
+    }
+    return -logf(x);
+  }
+  if (sign) {
+    x = -x;
+    t = sin_pi(x);
+    if (t == 0.0f) /* -integer */
+      return 1.0f / (x - x);
+    if (t > 0.0f)
+      *signgamp = -1;
+    else
+      t = -t;
+    nadj = logf(pi / (t * x));
+  }
+
+  /* purge off 1 and 2 */
+  if (ix == 0x3f800000 || ix == 0x40000000)
+    r = 0;
+  /* for x < 2.0 */
+  else if (ix < 0x40000000) {
+    if (ix <= 0x3f666666) { /* lgamma(x) = lgamma(x+1)-log(x) */
+      r = -logf(x);
+      if (ix >= 0x3f3b4a20) {
+        y = 1.0f - x;
+        i = 0;
+      } else if (ix >= 0x3e6d3308) {
+        y = x - (tc - 1.0f);
+        i = 1;
+      } else {
+        y = x;
+        i = 2;
+      }
+    } else {
+      r = 0.0f;
+      if (ix >= 0x3fdda618) { /* [1.7316,2] */
+        y = 2.0f - x;
+        i = 0;
+      } else if (ix >= 0x3F9da620) { /* [1.23,1.73] */
+        y = x - tc;
+        i = 1;
+      } else {
+        y = x - 1.0f;
+        i = 2;
+      }
+    }
+    switch (i) {
+      case 0:
+        z = y * y;
+        p1 = a0 + z * (a2 + z * (a4 + z * (a6 + z * (a8 + z * a10))));
+        p2 = z * (a1 + z * (a3 + z * (a5 + z * (a7 + z * (a9 + z * a11)))));
+        p = y * p1 + p2;
+        r += p - 0.5f * y;
+        break;
+      case 1:
+        z = y * y;
+        w = z * y;
+        p1 = t0 + w * (t3 + w * (t6 + w * (t9 + w * t12))); /* parallel comp */
+        p2 = t1 + w * (t4 + w * (t7 + w * (t10 + w * t13)));
+        p3 = t2 + w * (t5 + w * (t8 + w * (t11 + w * t14)));
+        p = z * p1 - (tt - w * (p2 + y * p3));
+        r += (tf + p);
+        break;
+      case 2:
+        p1 = y * (u0 + y * (u1 + y * (u2 + y * (u3 + y * (u4 + y * u5)))));
+        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 = 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 */
+      case 5:
+        z *= y + 4.0f; /* FALLTHRU */
+      case 4:
+        z *= y + 3.0f; /* FALLTHRU */
+      case 3:
+        z *= y + 2.0f; /* FALLTHRU */
+        r += logf(z);
+        break;
+    }
+  } else if (ix < 0x5c800000) { /* 8.0 <= x < 2**58 */
+    t = logf(x);
+    z = 1.0f / x;
+    y = z * z;
+    w = w0 + z * (w1 + y * (w2 + y * (w3 + y * (w4 + y * (w5 + y * w6)))));
+    r = (x - 0.5f) * (t - 1.0f) + w;
+  } else /* 2**58 <= x <= inf */
+    r = x * (logf(x) - 1.0f);
+  if (sign)
+    r = nadj - r;
+  return r;
 }
 
 weak_alias(__lgammaf_r, lgammaf_r);