diff options
Diffstat (limited to 'sysdeps/libm-ieee754/s_exp2.c')
| -rw-r--r-- | sysdeps/libm-ieee754/s_exp2.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/sysdeps/libm-ieee754/s_exp2.c b/sysdeps/libm-ieee754/s_exp2.c index ead1ce89eb..875d4d6f2c 100644 --- a/sysdeps/libm-ieee754/s_exp2.c +++ b/sysdeps/libm-ieee754/s_exp2.c @@ -48,7 +48,7 @@ __ieee754_exp2 (double x) /* Check for usual case. */ if (isless (x, himark) && isgreater (x, lomark)) { - static const double TWO43 = 8796093022208.0; + static const double THREEp42 = 13194139533312.0; int tval, unsafe; double rx, x22, result; union ieee754_double ex2_u, scale_u; @@ -66,16 +66,8 @@ __ieee754_exp2 (double x) x = ex + t/512 + x1. First, calculate rx = ex + t/512. */ - if (x >= 0) - { - rx = x + TWO43; - rx -= TWO43; - } - else - { - rx = x - TWO43; - rx += TWO43; - } + rx = x + THREEp42; + rx -= THREEp42; x -= rx; /* Compute x=x1. */ /* Compute tval = (ex*512 + t)+256. Now, t = (tval mod 512)-256 and ex=tval/512 [that's mod, NOT %; and |