Log2 and log10 for wordsize-64.

This patch also fixes indentation on default dbl-64 code.

1 files changed, 30 insertions, 29 deletions

diff --git a/sysdeps/ieee754/dbl-64/e_log10.c b/sysdeps/ieee754/dbl-64/e_log10.c
index 9fce937085..ab5069e58e 100644
--- a/sysdeps/ieee754/dbl-64/e_log10.c
+++ b/sysdeps/ieee754/dbl-64/e_log10.c
@@ -46,39 +46,40 @@
 #include <math.h>
 #include <math_private.h>
 
-static const double
-two54      =  1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */
-ivln10     =  4.34294481903251816668e-01, /* 0x3FDBCB7B, 0x1526E50E */
-log10_2hi  =  3.01029995663611771306e-01, /* 0x3FD34413, 0x509F6000 */
-log10_2lo  =  3.69423907715893078616e-13; /* 0x3D59FEF3, 0x11F12B36 */
-
-static const double zero   =  0.0;
+static const double two54 = 1.80143985094819840000e+16;		/* 0x43500000, 0x00000000 */
+static const double ivln10 = 4.34294481903251816668e-01;	/* 0x3FDBCB7B, 0x1526E50E */
+static const double log10_2hi = 3.01029995663611771306e-01;	/* 0x3FD34413, 0x509F6000 */
+static const double log10_2lo = 3.69423907715893078616e-13;	/* 0x3D59FEF3, 0x11F12B36 */
 
 double
-__ieee754_log10(double x)
+__ieee754_log10 (double x)
 {
-	double y,z;
-	int32_t i,k,hx;
-	u_int32_t lx;
+  double y, z;
+  int32_t i, k, hx;
+  u_int32_t lx;
 
-	EXTRACT_WORDS(hx,lx,x);
+  EXTRACT_WORDS (hx, lx, x);
 
-	k=0;
-	if (hx < 0x00100000) {			/* x < 2**-1022  */
-	    if (__builtin_expect(((hx&0x7fffffff)|lx)==0, 0))
-		return -two54/(x-x);		/* log(+-0)=-inf */
-	    if (__builtin_expect(hx<0, 0))
-		return (x-x)/(x-x);	/* log(-#) = NaN */
-	    k -= 54; x *= two54; /* subnormal number, scale up x */
-	    GET_HIGH_WORD(hx,x);
-	}
-	if (__builtin_expect(hx >= 0x7ff00000, 0)) return x+x;
-	k += (hx>>20)-1023;
-	i  = ((u_int32_t)k&0x80000000)>>31;
-	hx = (hx&0x000fffff)|((0x3ff-i)<<20);
-	y  = (double)(k+i);
-	SET_HIGH_WORD(x,hx);
-	z  = y*log10_2lo + ivln10*__ieee754_log(x);
-	return  z+y*log10_2hi;
+  k = 0;
+  if (hx < 0x00100000)
+    {				/* x < 2**-1022  */
+      if (__builtin_expect (((hx & 0x7fffffff) | lx) == 0, 0))
+	return -two54 / (x - x);	/* log(+-0)=-inf */
+      if (__builtin_expect (hx < 0, 0))
+	return (x - x) / (x - x);	/* log(-#) = NaN */
+      k -= 54;
+      x *= two54;		/* subnormal number, scale up x */
+      GET_HIGH_WORD (hx, x);
+    }
+  if (__builtin_expect (hx >= 0x7ff00000, 0))
+    return x + x;
+  k += (hx >> 20) - 1023;
+  i = ((u_int32_t) k & 0x80000000) >> 31;
+  hx = (hx & 0x000fffff) | ((0x3ff - i) << 20);
+  y = (double) (k + i);
+  SET_HIGH_WORD (x, hx);
+  z = y * log10_2lo + ivln10 * __ieee754_log (x);
+  return z + y * log10_2hi;
 }
+
 strong_alias (__ieee754_log10, __log10_finite)