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avoid negative shift

This commit is contained in:
christos 2018-03-06 01:14:41 +00:00
parent c1a3e95979
commit 462103bc5a
1 changed files with 3 additions and 2 deletions
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5
lib/libm/noieee_src/n_exp2.c
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@ -25,7 +25,7 @@
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: n_exp2.c,v 1.3 2014/03/23 15:26:47 martin Exp $");
__RCSID("$NetBSD: n_exp2.c,v 1.4 2018/03/06 01:14:41 christos Exp $");
#ifdef __FBSDID
__FBSDID("$FreeBSD: src/lib/msun/src/s_exp2.c,v 1.7 2008/02/22 02:27:34 das Exp $");
#endif
@ -372,7 +372,8 @@ exp2(double x)
/* Compute r = exp2(y) = exp2t[i0] * p(z - eps[i]). */
t = tbl[i0]; /* exp2t[i0] */
z -= tbl[i0 + 1]; /* eps[i0] */
big = k >= -1021 << 20;
/* -1021 << 20 == 3075 << 20 */
big = k >= 3075 << 20;
if (big) {
temp = 0x3ff00000+k;
twopk = 0.0;