#include "libm.h"
-static const float one = 1.0, half = 0.5, huge = 1.0e30;
+static const float huge = 1.0e30;
float coshf(float x)
{
/* |x| in [0,0.5*ln2], return 1+expm1(|x|)^2/(2*exp(|x|)) */
if (ix < 0x3eb17218) {
t = expm1f(fabsf(x));
- w = one+t;
+ w = 1.0f+t;
if (ix<0x39800000)
- return one; /* cosh(tiny) = 1 */
- return one + (t*t)/(w+w);
+ return 1.0f; /* cosh(tiny) = 1 */
+ return 1.0f + (t*t)/(w+w);
}
/* |x| in [0.5*ln2,9], return (exp(|x|)+1/exp(|x|))/2; */
if (ix < 0x41100000) {
t = expf(fabsf(x));
- return half*t + half/t;
+ return 0.5f*t + 0.5f/t;
}
- /* |x| in [9, log(maxfloat)] return half*exp(|x|) */
+ /* |x| in [9, log(maxfloat)] return 0.5f*exp(|x|) */
if (ix < 0x42b17217)
- return half*expf(fabsf(x));
+ return 0.5f*expf(fabsf(x));
/* |x| in [log(maxfloat), overflowthresold] */
if (ix <= 0x42b2d4fc)