sh: Migrate necessary libgcc bits in to arch/sh/lib for SUPERH32.

This moves in the necessary libgcc bits for SUPERH32 and drops the
libgcc linking for the regular targets. This in turn allows us to rip
out quite a few hacks both in sh_ksyms_32 and arch/sh/Makefile.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/arch/sh/lib/ashrdi3.c b/arch/sh/lib/ashrdi3.c
new file mode 100644
index 000000000000..c884a912b660
--- /dev/null
+++ b/arch/sh/lib/ashrdi3.c
@@ -0,0 +1,31 @@
+#include <linux/module.h>
+
+#include "libgcc.h"
+
+long long __ashrdi3(long long u, word_type b)
+{
+        DWunion uu, w;
+        word_type bm;
+
+        if (b == 0)
+                return u;
+
+        uu.ll = u;
+        bm = 32 - b;
+
+        if (bm <= 0) {
+                /* w.s.high = 1..1 or 0..0 */
+                w.s.high =
+                    uu.s.high >> 31;
+                w.s.low = uu.s.high >> -bm;
+        } else {
+                const unsigned int carries = (unsigned int) uu.s.high << bm;
+
+                w.s.high = uu.s.high >> b;
+                w.s.low = ((unsigned int) uu.s.low >> b) | carries;
+        }
+
+        return w.ll;
+}
+
+EXPORT_SYMBOL(__ashrdi3);