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| author | Jeff Law <law@gcc.gnu.org> | 1998-01-31 18:37:08 -0700 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1998-01-31 18:37:08 -0700 |
| commit | 81fea2b1d147752f431b46c08f4c12a18a2d78bc (patch) | |
| tree | 4b30cdf598ee6a8b24903fba52bb3e0c06bf459b /libf2c/libF77/pow_hh.c | |
| parent | 0dfb6849ef1d4c8b5bf178d7add69ab297fab8fa (diff) | |
| download | gcc-81fea2b1d147752f431b46c08f4c12a18a2d78bc.zip gcc-81fea2b1d147752f431b46c08f4c12a18a2d78bc.tar.gz gcc-81fea2b1d147752f431b46c08f4c12a18a2d78bc.tar.bz2 | |
* Previous contents of gcc/f/runtime moved into toplevel
"libf2c" directory.
From-SVN: r17568
Diffstat (limited to 'libf2c/libF77/pow_hh.c')
| -rw-r--r-- | libf2c/libF77/pow_hh.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/libf2c/libF77/pow_hh.c b/libf2c/libF77/pow_hh.c new file mode 100644 index 0000000..24a0197 --- /dev/null +++ b/libf2c/libF77/pow_hh.c @@ -0,0 +1,33 @@ +#include "f2c.h" + +#ifdef KR_headers +shortint pow_hh(ap, bp) shortint *ap, *bp; +#else +shortint pow_hh(shortint *ap, shortint *bp) +#endif +{ + shortint pow, x, n; + unsigned u; + + x = *ap; + n = *bp; + + if (n <= 0) { + if (n == 0 || x == 1) + return 1; + if (x != -1) + return x == 0 ? 1/x : 0; + n = -n; + } + u = n; + for(pow = 1; ; ) + { + if(u & 01) + pow *= x; + if(u >>= 1) + x *= x; + else + break; + } + return(pow); + } |