math: minor cleanups in ceil and floor

src/math/ceil.c

@@ -34,7 +34,6 @@ double ceil(double x)
 		if (j0 < 0) {
 			 /* raise inexact if x != 0 */
 			if (huge+x > 0.0) {
-				/* return 0*sign(x) if |x|<1 */
 				if (i0 < 0) {
 					i0 = 0x80000000;
 					i1=0;
@@ -44,7 +43,7 @@ double ceil(double x)
 				}
 			}
 		} else {
-			i = (0x000fffff)>>j0;
+			i = 0x000fffff>>j0;
 			if (((i0&i)|i1) == 0) /* x is integral */
 				return x;
 			/* raise inexact flag */

src/math/ceilf.c

@@ -28,7 +28,6 @@ float ceilf(float x)
 		if (j0 < 0) {
 			/* raise inexact if x != 0 */
 			if (huge+x > 0.0f) {
-				/* return 0*sign(x) if |x|<1 */
 				if (i0 < 0)
 					i0 = 0x80000000;
 				else if(i0 != 0)

src/math/ceill.c

@@ -49,8 +49,7 @@ long double ceill(long double x)
 
 static const long double huge = 1.0e300;
 
-long double
+long double ceill(long double x)
-ceill(long double x)
 {
 	union IEEEl2bits u = { .e = x };
 	int e = u.bits.exp - LDBL_MAX_EXP + 1;

src/math/floor.c

@@ -50,7 +50,7 @@ double floor(double x)
 				if (i0 < 0)
 					i0 += 0x00100000>>j0;
 				i0 &= ~i;
-				i1=0;
+				i1 = 0;
 			}
 		}
 	} else if (j0 > 51) {
@@ -59,18 +59,18 @@ double floor(double x)
 		else
 			return x;   /* x is integral */
 	} else {
-		i = ((uint32_t)(0xffffffff))>>(j0-20);
+		i = (uint32_t)0xffffffff>>(j0-20);
 		if ((i1&i) == 0)
 			return x;   /* x is integral */
 		/* raise inexact flag */
 		if (huge+x > 0.0) {
 			if (i0 < 0) {
 				if (j0 == 20)
-					i0+=1;
+					i0++;
 				else {
 					j = i1+(1<<(52-j0));
 					if (j < i1)
-						i0 += 1; /* got a carry */
+						i0++; /* got a carry */
 					i1 = j;
 				}
 			}

src/math/floorl.c

@@ -97,6 +97,6 @@ long double floorl(long double x)
 		if (huge + x > 0.0)
 			u.bits.manl &= ~m;
 	}
-	return (u.e);
+	return u.e;
 }
 #endif