[fusl] clang-format fusl

fusl/src/math/expm1f.c

 /* origin: FreeBSD /usr/src/lib/msun/src/s_expm1f.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"
 
-static const float
-o_threshold = 8.8721679688e+01, /* 0x42b17180 */
-ln2_hi      = 6.9313812256e-01, /* 0x3f317180 */
-ln2_lo      = 9.0580006145e-06, /* 0x3717f7d1 */
-invln2      = 1.4426950216e+00, /* 0x3fb8aa3b */
-/*
- * Domain [-0.34568, 0.34568], range ~[-6.694e-10, 6.696e-10]:
- * |6 / x * (1 + 2 * (1 / (exp(x) - 1) - 1 / x)) - q(x)| < 2**-30.04
- * Scaled coefficients: Qn_here = 2**n * Qn_for_q (see s_expm1.c):
- */
-Q1 = -3.3333212137e-2, /* -0x888868.0p-28 */
-Q2 =  1.5807170421e-3; /*  0xcf3010.0p-33 */
+static const float o_threshold = 8.8721679688e+01, /* 0x42b17180 */
+    ln2_hi = 6.9313812256e-01,                     /* 0x3f317180 */
+    ln2_lo = 9.0580006145e-06,                     /* 0x3717f7d1 */
+    invln2 = 1.4426950216e+00,                     /* 0x3fb8aa3b */
+                                                   /*
+                                                    * Domain [-0.34568, 0.34568], range ~[-6.694e-10, 6.696e-10]:
+                                                    * |6 / x * (1 + 2 * (1 / (exp(x) - 1) - 1 / x)) - q(x)| < 2**-30.04
+                                                    * Scaled coefficients: Qn_here = 2**n * Qn_for_q (see s_expm1.c):
+                                                    */
+    Q1 = -3.3333212137e-2,                         /* -0x888868.0p-28 */
+    Q2 = 1.5807170421e-3;                          /*  0xcf3010.0p-33 */
 
-float expm1f(float x)
-{
-        float_t y,hi,lo,c,t,e,hxs,hfx,r1,twopk;
-        union {float f; uint32_t i;} u = {x};
-        uint32_t hx = u.i & 0x7fffffff;
-        int k, sign = u.i >> 31;
+float expm1f(float x) {
+  float_t y, hi, lo, c, t, e, hxs, hfx, r1, twopk;
+  union {
+    float f;
+    uint32_t i;
+  } u = {x};
+  uint32_t hx = u.i & 0x7fffffff;
+  int k, sign = u.i >> 31;
 
-        /* filter out huge and non-finite argument */
-        if (hx >= 0x4195b844) {  /* if |x|>=27*ln2 */
-                if (hx > 0x7f800000)  /* NaN */
-                        return x;
-                if (sign)
-                        return -1;
-                if (x > o_threshold) {
-                        x *= 0x1p127f;
-                        return x;
-                }
-        }
+  /* filter out huge and non-finite argument */
+  if (hx >= 0x4195b844) { /* if |x|>=27*ln2 */
+    if (hx > 0x7f800000)  /* NaN */
+      return x;
+    if (sign)
+      return -1;
+    if (x > o_threshold) {
+      x *= 0x1p127f;
+      return x;
+    }
+  }
 
-        /* argument reduction */
-        if (hx > 0x3eb17218) {           /* if  |x| > 0.5 ln2 */
-                if (hx < 0x3F851592) {       /* and |x| < 1.5 ln2 */
-                        if (!sign) {
-                                hi = x - ln2_hi;
-                                lo = ln2_lo;
-                                k =  1;
-                        } else {
-                                hi = x + ln2_hi;
-                                lo = -ln2_lo;
-                                k = -1;
-                        }
-                } else {
-                        k  = invln2*x + (sign ? -0.5f : 0.5f);
-                        t  = k;
-                        hi = x - t*ln2_hi;      /* t*ln2_hi is exact here */
-                        lo = t*ln2_lo;
-                }
-                x = hi-lo;
-                c = (hi-x)-lo;
-        } else if (hx < 0x33000000) {  /* when |x|<2**-25, return x */
-                if (hx < 0x00800000)
-                        FORCE_EVAL(x*x);
-                return x;
-        } else
-                k = 0;
+  /* argument reduction */
+  if (hx > 0x3eb17218) {   /* if  |x| > 0.5 ln2 */
+    if (hx < 0x3F851592) { /* and |x| < 1.5 ln2 */
+      if (!sign) {
+        hi = x - ln2_hi;
+        lo = ln2_lo;
+        k = 1;
+      } else {
+        hi = x + ln2_hi;
+        lo = -ln2_lo;
+        k = -1;
+      }
+    } else {
+      k = invln2 * x + (sign ? -0.5f : 0.5f);
+      t = k;
+      hi = x - t * ln2_hi; /* t*ln2_hi is exact here */
+      lo = t * ln2_lo;
+    }
+    x = hi - lo;
+    c = (hi - x) - lo;
+  } else if (hx < 0x33000000) { /* when |x|<2**-25, return x */
+    if (hx < 0x00800000)
+      FORCE_EVAL(x * x);
+    return x;
+  } else
+    k = 0;
 
-        /* x is now in primary range */
-        hfx = 0.5f*x;
-        hxs = x*hfx;
-        r1 = 1.0f+hxs*(Q1+hxs*Q2);
-        t  = 3.0f - r1*hfx;
-        e  = hxs*((r1-t)/(6.0f - x*t));
-        if (k == 0)  /* c is 0 */
-                return x - (x*e-hxs);
-        e  = x*(e-c) - c;
-        e -= hxs;
-        /* exp(x) ~ 2^k (x_reduced - e + 1) */
-        if (k == -1)
-                return 0.5f*(x-e) - 0.5f;
-        if (k == 1) {
-                if (x < -0.25f)
-                        return -2.0f*(e-(x+0.5f));
-                return 1.0f + 2.0f*(x-e);
-        }
-        u.i = (0x7f+k)<<23;  /* 2^k */
-        twopk = u.f;
-        if (k < 0 || k > 56) {   /* suffice to return exp(x)-1 */
-                y = x - e + 1.0f;
-                if (k == 128)
-                        y = y*2.0f*0x1p127f;
-                else
-                        y = y*twopk;
-                return y - 1.0f;
-        }
-        u.i = (0x7f-k)<<23;  /* 2^-k */
-        if (k < 23)
-                y = (x-e+(1-u.f))*twopk;
-        else
-                y = (x-(e+u.f)+1)*twopk;
-        return y;
+  /* x is now in primary range */
+  hfx = 0.5f * x;
+  hxs = x * hfx;
+  r1 = 1.0f + hxs * (Q1 + hxs * Q2);
+  t = 3.0f - r1 * hfx;
+  e = hxs * ((r1 - t) / (6.0f - x * t));
+  if (k == 0) /* c is 0 */
+    return x - (x * e - hxs);
+  e = x * (e - c) - c;
+  e -= hxs;
+  /* exp(x) ~ 2^k (x_reduced - e + 1) */
+  if (k == -1)
+    return 0.5f * (x - e) - 0.5f;
+  if (k == 1) {
+    if (x < -0.25f)
+      return -2.0f * (e - (x + 0.5f));
+    return 1.0f + 2.0f * (x - e);
+  }
+  u.i = (0x7f + k) << 23; /* 2^k */
+  twopk = u.f;
+  if (k < 0 || k > 56) { /* suffice to return exp(x)-1 */
+    y = x - e + 1.0f;
+    if (k == 128)
+      y = y * 2.0f * 0x1p127f;
+    else
+      y = y * twopk;
+    return y - 1.0f;
+  }
+  u.i = (0x7f - k) << 23; /* 2^-k */
+  if (k < 23)
+    y = (x - e + (1 - u.f)) * twopk;
+  else
+    y = (x - (e + u.f) + 1) * twopk;
+  return y;
 }