Initial integration of G77.

Please do a make cleandir before rebuilding gcc!

1 files changed, 35 insertions, 0 deletions

diff --git a/gnu/usr.bin/gcc/f/runtime/libF77/pow_ri.c b/gnu/usr.bin/gcc/f/runtime/libF77/pow_ri.c
new file mode 100644
index 00000000000..6e5816bbf10
--- /dev/null
+++ b/gnu/usr.bin/gcc/f/runtime/libF77/pow_ri.c
@@ -0,0 +1,35 @@
+#include "f2c.h"
+
+#ifdef KR_headers
+double pow_ri(ap, bp) real *ap; integer *bp;
+#else
+double pow_ri(real *ap, integer *bp)
+#endif
+{
+double pow, x;
+integer n;
+unsigned long u;
+
+pow = 1;
+x = *ap;
+n = *bp;
+
+if(n != 0)
+	{
+	if(n < 0)
+		{
+		n = -n;
+		x = 1/x;
+		}
+	for(u = n; ; )
+		{
+		if(u & 01)
+			pow *= x;
+		if(u >>= 1)
+			x *= x;
+		else
+			break;
+		}
+	}
+return(pow);
+}