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authorpeter <peter@FreeBSD.org>2008-06-01 00:03:21 +0000
committerpeter <peter@FreeBSD.org>2008-06-01 00:03:21 +0000
commita2be5f0c15218b0177d73b17d9bcb7589965d685 (patch)
treec9f0cd9c22378356a1716d32e13e70bc90f98b9c /libf2c/libF77/qbitbits.c
parent9e0f3cc19c9df1594c9cc36cfd8fddc83c52ad12 (diff)
downloadFreeBSD-src-a2be5f0c15218b0177d73b17d9bcb7589965d685.zip
FreeBSD-src-a2be5f0c15218b0177d73b17d9bcb7589965d685.tar.gz
Reorganize the gcc vendor import work area. This flattens out a bunch
of unnecessary path components that are relics of cvs2svn. (These are directory moves)
Diffstat (limited to 'libf2c/libF77/qbitbits.c')
-rw-r--r--libf2c/libF77/qbitbits.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/libf2c/libF77/qbitbits.c b/libf2c/libF77/qbitbits.c
new file mode 100644
index 0000000..f72858e
--- /dev/null
+++ b/libf2c/libF77/qbitbits.c
@@ -0,0 +1,62 @@
+#include "f2c.h"
+
+#ifndef LONGBITS
+#define LONGBITS 32
+#endif
+
+#ifndef LONG8BITS
+#define LONG8BITS (2*LONGBITS)
+#endif
+
+integer
+qbit_bits (longint a, integer b, integer len)
+{
+ /* Assume 2's complement arithmetic */
+
+ ulongint x, y;
+
+ x = (ulongint) a;
+ y = (ulongint) - 1L;
+ x >>= b;
+ y <<= len;
+ return (longint) (x & y);
+}
+
+longint
+qbit_cshift (longint a, integer b, integer len)
+{
+ ulongint x, y, z;
+
+ x = (ulongint) a;
+ if (len <= 0)
+ {
+ if (len == 0)
+ return 0;
+ goto full_len;
+ }
+ if (len >= LONG8BITS)
+ {
+ full_len:
+ if (b >= 0)
+ {
+ b %= LONG8BITS;
+ return (longint) (x << b | x >> (LONG8BITS - b));
+ }
+ b = -b;
+ b %= LONG8BITS;
+ return (longint) (x << (LONG8BITS - b) | x >> b);
+ }
+ y = z = (unsigned long) -1;
+ y <<= len;
+ z &= ~y;
+ y &= x;
+ x &= z;
+ if (b >= 0)
+ {
+ b %= len;
+ return (longint) (y | (z & (x << b | x >> (len - b))));
+ }
+ b = -b;
+ b %= len;
+ return (longint) (y | (z & (x >> b | x << (len - b))));
+}
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