1 files changed, 45 insertions, 0 deletions

diff --git a/arch/powerpc/math-emu/mtfsf.c b/arch/powerpc/math-emu/mtfsf.c
new file mode 100644
index 000000000000..d70cf714994c
--- /dev/null
+++ b/arch/powerpc/math-emu/mtfsf.c
@@ -0,0 +1,45 @@
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+#include "soft-fp.h"
+
+int
+mtfsf(unsigned int FM, u32 *frB)
+{
+        u32 mask;
+
+        if (FM == 0)
+                return 0;
+
+        if (FM == 0xff)
+                mask = 0x9fffffff;
+        else {
+                mask = 0;
+                if (FM & (1 << 0))
+                        mask |= 0x90000000;
+                if (FM & (1 << 1))
+                        mask |= 0x0f000000;
+                if (FM & (1 << 2))
+                        mask |= 0x00f00000;
+                if (FM & (1 << 3))
+                        mask |= 0x000f0000;
+                if (FM & (1 << 4))
+                        mask |= 0x0000f000;
+                if (FM & (1 << 5))
+                        mask |= 0x00000f00;
+                if (FM & (1 << 6))
+                        mask |= 0x000000f0;
+                if (FM & (1 << 7))
+                        mask |= 0x0000000f;
+        }
+
+        __FPU_FPSCR &= ~(mask);
+        __FPU_FPSCR |= (frB[1] & mask);
+
+#ifdef DEBUG
+        printk("%s: %02x %p: %08lx\n", __FUNCTION__, FM, frB, __FPU_FPSCR);
+#endif
+
+        return 0;
+}