X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=blobdiff_plain;f=src%2Fmath%2Flog1pl.c;h=edb48df1cd9c0ea5bdfb937f377654304651e4c4;hp=7aafc5cec911476c5f2d930c7806976f194177c9;hb=8bb181622222f2ee3462c8b021bcae4fcdbbd37a;hpb=b69f695acedd4ce2798ef9ea28d834ceccc789bd

diff --git a/src/math/log1pl.c b/src/math/log1pl.c
index 7aafc5ce..edb48df1 100644
--- a/src/math/log1pl.c
+++ b/src/math/log1pl.c
@@ -46,11 +46,6 @@
  *                      Relative error:
  * arithmetic   domain     # trials      peak         rms
  *    IEEE     -1.0, 9.0    100000      8.2e-20    2.5e-20
- *
- * ERROR MESSAGES:
- *
- * log singularity:  x-1 = 0; returns -INFINITY
- * log domain:       x-1 < 0; returns NAN
  */
 
 #include "libm.h"
@@ -65,7 +60,7 @@ long double log1pl(long double x)
  * 1/sqrt(2) <= x < sqrt(2)
  * Theoretical peak relative error = 2.32e-20
  */
-static long double P[] = {
+static const long double P[] = {
  4.5270000862445199635215E-5L,
  4.9854102823193375972212E-1L,
  6.5787325942061044846969E0L,
@@ -74,7 +69,7 @@ static long double P[] = {
  5.7112963590585538103336E1L,
  2.0039553499201281259648E1L,
 };
-static long double Q[] = {
+static const long double Q[] = {
 /* 1.0000000000000000000000E0,*/
  1.5062909083469192043167E1L,
  8.3047565967967209469434E1L,
@@ -89,13 +84,13 @@ 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,
@@ -118,13 +113,13 @@ long double log1pl(long double xm1)
 	if (xm1 == 0.0)
 		return xm1;
 
-	x = xm1 + 1.0L;
+	x = xm1 + 1.0;
 
 	/* Test for domain errors.  */
-	if (x <= 0.0L) {
-		if (x == 0.0L)
-			return -INFINITY;
-		return NAN;
+	if (x <= 0.0) {
+		if (x == 0.0)
+			return -1/x; /* -inf with divbyzero */
+		return 0/0.0f; /* nan with invalid */
 	}
 
 	/* Separate mantissa from exponent.
@@ -136,12 +131,12 @@ long double log1pl(long double xm1)
 	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;
@@ -156,12 +151,12 @@ long double log1pl(long double xm1)
 	if (x < SQRTH) {
 		e -= 1;
 		if (e != 0)
-			x = 2.0 * x - 1.0L;
+			x = 2.0 * x - 1.0;
 		else
 			x = xm1;
 	} else {
 		if (e != 0)
-			x = x - 1.0L;
+			x = x - 1.0;
 		else
 			x = xm1;
 	}