math: use 0x1p-120f and 0x1p120f for tiny and huge values

[musl] / src / math / atan2l.c

diff --git a/src/math/atan2l.c b/src/math/atan2l.c
index e86dbff..7cb42c2 100644 (file)
--- a/src/math/atan2l.c
+++ b/src/math/atan2l.c
@@ -52,39 +52,39 @@ long double atan2l(long double y, long double x)
                switch(m) {
                case 0:
                case 1: return y;           /* atan(+-0,+anything)=+-0 */
-               case 2: return  2*pio2_hi+0x1p-1000; /* atan(+0,-anything) = pi */
-               case 3: return -2*pio2_hi-0x1p-1000; /* atan(-0,-anything) =-pi */
+               case 2: return  2*pio2_hi+0x1p-120f; /* atan(+0,-anything) = pi */
+               case 3: return -2*pio2_hi-0x1p-120f; /* atan(-0,-anything) =-pi */
                }
        }
        /* when x = 0 */
        if (exptx==0 && ((ux.bits.manh&~LDBL_NBIT)|ux.bits.manl)==0)
-               return expsigny < 0 ? -pio2_hi-0x1p-1000 : pio2_hi+0x1p-1000;
+               return expsigny < 0 ? -pio2_hi-0x1p-120f : pio2_hi+0x1p-120f;
        /* when x is INF */
        if (exptx == 0x7fff) {
                if (expty == 0x7fff) {
                        switch(m) {
-                       case 0: return  pio2_hi*0.5+0x1p-1000; /* atan(+INF,+INF) */
-                       case 1: return -pio2_hi*0.5-0x1p-1000; /* atan(-INF,+INF) */
-                       case 2: return  1.5*pio2_hi+0x1p-1000; /* atan(+INF,-INF) */
-                       case 3: return -1.5*pio2_hi-0x1p-1000; /* atan(-INF,-INF) */
+                       case 0: return  pio2_hi*0.5+0x1p-120f; /* atan(+INF,+INF) */
+                       case 1: return -pio2_hi*0.5-0x1p-120f; /* atan(-INF,+INF) */
+                       case 2: return  1.5*pio2_hi+0x1p-120f; /* atan(+INF,-INF) */
+                       case 3: return -1.5*pio2_hi-0x1p-120f; /* atan(-INF,-INF) */
                        }
                } else {
                        switch(m) {
                        case 0: return  0.0;        /* atan(+...,+INF) */
                        case 1: return -0.0;        /* atan(-...,+INF) */
-                       case 2: return  2*pio2_hi+0x1p-1000; /* atan(+...,-INF) */
-                       case 3: return -2*pio2_hi-0x1p-1000; /* atan(-...,-INF) */
+                       case 2: return  2*pio2_hi+0x1p-120f; /* atan(+...,-INF) */
+                       case 3: return -2*pio2_hi-0x1p-120f; /* atan(-...,-INF) */
                        }
                }
        }
        /* when y is INF */
        if (expty == 0x7fff)
-               return expsigny < 0 ? -pio2_hi-0x1p-1000 : pio2_hi+0x1p-1000;
+               return expsigny < 0 ? -pio2_hi-0x1p-120f : pio2_hi+0x1p-120f;
 
        /* compute y/x */
        k = expty-exptx;
        if(k > LDBL_MANT_DIG+2) { /* |y/x| huge */
-               z = pio2_hi+0x1p-1000;
+               z = pio2_hi+0x1p-120f;
                m &= 1;
        } else if (expsignx < 0 && k < -LDBL_MANT_DIG-2) /* |y/x| tiny, x<0 */
                z = 0.0;