source: asp3_tinet_ecnl_arm/trunk/musl-1.1.18/src/prng/drand48.c@ 352

Last change on this file since 352 was 352, checked in by coas-nagasima, 6 years ago

arm向けASP3版ECNLを追加
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc;charset=UTF-8
File size: 358 bytes
Line 
1#include <stdlib.h>
2#include <inttypes.h>
3
4uint64_t __rand48_step(unsigned short *xi, unsigned short *lc);
5extern unsigned short __seed48[7];
6
7double erand48(unsigned short s[3])
8{
9 union {
10 uint64_t u;
11 double f;
12 } x = { 0x3ff0000000000000ULL | __rand48_step(s, __seed48+3)<<4 };
13 return x.f - 1.0;
14}
15
16double drand48(void)
17{
18 return erand48(__seed48);
19}
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