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-rw-r--r--src/math/expm1.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/src/math/expm1.c b/src/math/expm1.c
index ffa82264..f8f32c46 100644
--- a/src/math/expm1.c
+++ b/src/math/expm1.c
@@ -107,7 +107,6 @@
#include "libm.h"
static const double
-one = 1.0,
huge = 1.0e+300,
tiny = 1.0e-300,
o_threshold = 7.09782712893383973096e+02, /* 0x40862E42, 0xFEFA39EF */
@@ -148,7 +147,7 @@ double expm1(double x)
if (xsb != 0) { /* x < -56*ln2, return -1.0 with inexact */
/* raise inexact */
if(x+tiny<0.0)
- return tiny-one; /* return -1 */
+ return tiny-1.0; /* return -1 */
}
}
@@ -182,7 +181,7 @@ double expm1(double x)
/* x is now in primary range */
hfx = 0.5*x;
hxs = x*hfx;
- r1 = one+hxs*(Q1+hxs*(Q2+hxs*(Q3+hxs*(Q4+hxs*Q5))));
+ r1 = 1.0+hxs*(Q1+hxs*(Q2+hxs*(Q3+hxs*(Q4+hxs*Q5))));
t = 3.0-r1*hfx;
e = hxs*((r1-t)/(6.0 - x*t));
if (k == 0) /* c is 0 */
@@ -195,17 +194,17 @@ double expm1(double x)
if (k == 1) {
if (x < -0.25)
return -2.0*(e-(x+0.5));
- return one+2.0*(x-e);
+ return 1.0+2.0*(x-e);
}
if (k <= -2 || k > 56) { /* suffice to return exp(x)-1 */
- y = one - (e-x);
+ y = 1.0 - (e-x);
if (k == 1024)
y = y*2.0*0x1p1023;
else
y = y*twopk;
- return y - one;
+ return y - 1.0;
}
- t = one;
+ t = 1.0;
if (k < 20) {
SET_HIGH_WORD(t, 0x3ff00000 - (0x200000>>k)); /* t=1-2^-k */
y = t-(e-x);
@@ -213,7 +212,7 @@ double expm1(double x)
} else {
SET_HIGH_WORD(t, ((0x3ff-k)<<20)); /* 2^-k */
y = x-(e+t);
- y += one;
+ y += 1.0;
y = y*twopk;
}
return y;