Mercurial > hg > CbC > CbC_gcc

annotate gcc/config/floatunsisf.c @ 48:9907f3135723

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
update CbC on GCC from 4.4.2 to 4.4.3.
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Sun, 07 Feb 2010 17:48:31 +0900
parents a06113de4d67
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
1 /* Public domain. */
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
2 typedef int SItype __attribute__ ((mode (SI)));
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
3 typedef unsigned int USItype __attribute__ ((mode (SI)));
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
4 typedef float SFtype __attribute__ ((mode (SF)));
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
5
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
6 SFtype
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
7 __floatunsisf (USItype u)
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
8 {
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
9 SItype s = (SItype) u;
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
10 if (s < 0)
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
11 {
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
12 /* As in expand_float, compute (u & 1) | (u >> 1) to ensure
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
13 correct rounding if a nonzero bit is shifted out. */
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
14 return (SFtype) 2.0 * (SFtype) (SItype) ((u & 1) | (u >> 1));
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
15 }
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
16 else
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
17 return (SFtype) s;
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
18 }