math: raise invalid flag in ilogb*.c on +-0, +-inf and nan

[musl] / src / math / atan.c

diff --git a/src/math/atan.c b/src/math/atan.c
index d31782c..f34551c 100644 (file)
--- a/src/math/atan.c
+++ b/src/math/atan.c
@@ -60,9 +60,7 @@ static const double aT[] = {
   1.62858201153657823623e-02, /* 0x3F90AD3A, 0xE322DA11 */
 };
 
-static const double
-one = 1.0,
-huge = 1.0e300;
+static const double huge = 1.0e300;
 
 double atan(double x)
 {
@@ -86,7 +84,7 @@ double atan(double x)
        if (ix < 0x3fdc0000) {    /* |x| < 0.4375 */
                if (ix < 0x3e400000) {  /* |x| < 2^-27 */
                        /* raise inexact */
-                       if (huge+x > one)
+                       if (huge+x > 1.0)
                                return x;
                }
                id = -1;
@@ -95,15 +93,15 @@ double atan(double x)
                if (ix < 0x3ff30000) {  /* |x| < 1.1875 */
                        if (ix < 0x3fe60000) {  /*  7/16 <= |x| < 11/16 */
                                id = 0;
-                               x = (2.0*x-one)/(2.0+x);
+                               x = (2.0*x-1.0)/(2.0+x);
                        } else {                /* 11/16 <= |x| < 19/16 */
                                id = 1;
-                               x = (x-one)/(x+one);
+                               x = (x-1.0)/(x+1.0);
                        }
                } else {
                        if (ix < 0x40038000) {  /* |x| < 2.4375 */
                                id = 2;
-                               x = (x-1.5)/(one+1.5*x);
+                               x = (x-1.5)/(1.0+1.5*x);
                        } else {                /* 2.4375 <= |x| < 2^66 */
                                id = 3;
                                x = -1.0/x;