Merge branch '85xx' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/powerpc

1 files changed, 37 insertions, 0 deletions

diff --git a/arch/powerpc/math-emu/lfs.c b/arch/powerpc/math-emu/lfs.c
new file mode 100644
index 000000000000..c86dee3d7655
--- /dev/null
+++ b/arch/powerpc/math-emu/lfs.c
@@ -0,0 +1,37 @@
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+#include "soft-fp.h"
+#include "double.h"
+#include "single.h"
+
+int
+lfs(void *frD, void *ea)
+{
+        FP_DECL_D(R);
+        FP_DECL_S(A);
+        float f;
+
+#ifdef DEBUG
+        printk("%s: D %p, ea %p\n", __FUNCTION__, frD, ea);
+#endif
+
+        if (copy_from_user(&f, ea, sizeof(float)))
+                return -EFAULT;
+
+        __FP_UNPACK_S(A, &f);
+
+#ifdef DEBUG
+        printk("A: %ld %lu %ld (%ld) [%08lx]\n", A_s, A_f, A_e, A_c,
+               *(unsigned long *)&f);
+#endif
+
+        FP_CONV(D, S, 2, 1, R, A);
+
+#ifdef DEBUG
+        printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
+#endif
+
+        return __FP_PACK_D(frD, R);
+}