1 files changed, 37 insertions, 0 deletions

diff --git a/arch/ppc/math-emu/fsqrt.c b/arch/ppc/math-emu/fsqrt.c
new file mode 100644
index 000000000000..6f8319f64a8a
--- /dev/null
+++ b/arch/ppc/math-emu/fsqrt.c
@@ -0,0 +1,37 @@
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+#include "soft-fp.h"
+#include "double.h"
+
+int
+fsqrt(void *frD, void *frB)
+{
+        FP_DECL_D(B);
+        FP_DECL_D(R);
+        int ret = 0;
+
+#ifdef DEBUG
+        printk("%s: %p %p %p %p\n", __FUNCTION__, frD, frB);
+#endif
+
+        __FP_UNPACK_D(B, frB);
+
+#ifdef DEBUG
+        printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
+#endif
+
+        if (B_s && B_c != FP_CLS_ZERO)
+                ret |= EFLAG_VXSQRT;
+        if (B_c == FP_CLS_NAN)
+                ret |= EFLAG_VXSNAN;
+
+        FP_SQRT_D(R, B);
+
+#ifdef DEBUG
+        printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
+#endif
+
+        return (ret | __FP_PACK_D(frD, R));
+}