X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;ds=inline;f=src%2Fmath%2Flog10l.c;h=63dcc286d6211d455f291dc9fff2704792a2d236;hb=0ab97350f01b42de0f9fd811ee08653169661859;hp=3a85883313387854a5517fcac8c8bda548cd843c;hpb=b69f695acedd4ce2798ef9ea28d834ceccc789bd;p=musl

diff --git a/src/math/log10l.c b/src/math/log10l.c
index 3a858833..63dcc286 100644
--- a/src/math/log10l.c
+++ b/src/math/log10l.c
@@ -69,7 +69,7 @@ long double log10l(long double x)
  * 1/sqrt(2) <= x < sqrt(2)
  * Theoretical peak relative error = 6.2e-22
  */
-static long double P[] = {
+static const long double P[] = {
  4.9962495940332550844739E-1L,
  1.0767376367209449010438E1L,
  7.7671073698359539859595E1L,
@@ -78,7 +78,7 @@ static long double P[] = {
  3.4258224542413922935104E2L,
  1.0747524399916215149070E2L,
 };
-static long double Q[] = {
+static const long double Q[] = {
 /* 1.0000000000000000000000E0,*/
  2.3479774160285863271658E1L,
  1.9444210022760132894510E2L,
@@ -94,13 +94,13 @@ static long double Q[] = {
  * 1/sqrt(2) <= x < sqrt(2)
  * Theoretical peak relative error = 6.16e-22
  */
-static long double R[4] = {
+static const long double R[4] = {
  1.9757429581415468984296E-3L,
 -7.1990767473014147232598E-1L,
  1.0777257190312272158094E1L,
 -3.5717684488096787370998E1L,
 };
-static long double S[4] = {
+static const long double S[4] = {
 /* 1.00000000000000000000E0L,*/
 -2.6201045551331104417768E1L,
  1.9361891836232102174846E2L,
@@ -117,16 +117,15 @@ static long double S[4] = {
 
 long double log10l(long double x)
 {
-	long double y;
-	volatile long double z;
+	long double y, z;
 	int e;
 
 	if (isnan(x))
 		return x;
-	if(x <= 0.0L) {
-		if(x == 0.0L)
-			return -1.0L / (x - x);
-		return (x - x) / (x - x);
+	if(x <= 0.0) {
+		if(x == 0.0)
+			return -1.0 / (x*x);
+		return (x - x) / 0.0;
 	}
 	if (x == INFINITY)
 		return INFINITY;
@@ -142,12 +141,12 @@ long double log10l(long double x)
 	if (e > 2 || e < -2) {
 		if (x < SQRTH) {  /* 2(2x-1)/(2x+1) */
 			e -= 1;
-			z = x - 0.5L;
-			y = 0.5L * z + 0.5L;
+			z = x - 0.5;
+			y = 0.5 * z + 0.5;
 		} else {  /*  2 (x-1)/(x+1)   */
-			z = x - 0.5L;
-			z -= 0.5L;
-			y = 0.5L * x  + 0.5L;
+			z = x - 0.5;
+			z -= 0.5;
+			y = 0.5 * x  + 0.5;
 		}
 		x = z / y;
 		z = x*x;
@@ -158,13 +157,13 @@ long double log10l(long double x)
 	/* logarithm using log(1+x) = x - .5x**2 + x**3 P(x)/Q(x) */
 	if (x < SQRTH) {
 		e -= 1;
-		x = ldexpl(x, 1) - 1.0L; /*  2x - 1  */
+		x = 2.0*x - 1.0;
 	} else {
-		x = x - 1.0L;
+		x = x - 1.0;
 	}
 	z = x*x;
 	y = x * (z * __polevll(x, P, 6) / __p1evll(x, Q, 7));
-	y = y - ldexpl(z, -1);   /* -0.5x^2 + ... */
+	y = y - 0.5*z;
 
 done:
 	/* Multiply log of fraction by log10(e)
@@ -183,4 +182,10 @@ done:
 	z += e * (L102A);
 	return z;
 }
+#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
+// TODO: broken implementation to make things compile
+long double log10l(long double x)
+{
+	return log10(x);
+}
 #endif