comparison gcc/config/floatunsisf.c @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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-1:000000000000 0:a06113de4d67
1 /* Public domain. */
2 typedef int SItype __attribute__ ((mode (SI)));
3 typedef unsigned int USItype __attribute__ ((mode (SI)));
4 typedef float SFtype __attribute__ ((mode (SF)));
5
6 SFtype
7 __floatunsisf (USItype u)
8 {
9 SItype s = (SItype) u;
10 if (s < 0)
11 {
12 /* As in expand_float, compute (u & 1) | (u >> 1) to ensure
13 correct rounding if a nonzero bit is shifted out. */
14 return (SFtype) 2.0 * (SFtype) (SItype) ((u & 1) | (u >> 1));
15 }
16 else
17 return (SFtype) s;
18 }