1 files changed, 31 insertions, 0 deletions

diff --git a/arch/powerpc/math-emu/mcrfs.c b/arch/powerpc/math-emu/mcrfs.c
new file mode 100644
index 000000000000..106dd912914b
--- /dev/null
+++ b/arch/powerpc/math-emu/mcrfs.c
@@ -0,0 +1,31 @@
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+#include "soft-fp.h"
+
+int
+mcrfs(u32 *ccr, u32 crfD, u32 crfS)
+{
+        u32 value, clear;
+
+#ifdef DEBUG
+        printk("%s: %p (%08x) %d %d\n", __FUNCTION__, ccr, *ccr, crfD, crfS);
+#endif
+
+        clear = 15 << ((7 - crfS) << 2);
+        if (!crfS)
+                clear = 0x90000000;
+
+        value = (__FPU_FPSCR >> ((7 - crfS) << 2)) & 15;
+        __FPU_FPSCR &= ~(clear);
+
+        *ccr &= ~(15 << ((7 - crfD) << 2));
+        *ccr |= (value << ((7 - crfD) << 2));
+
+#ifdef DEBUG
+        printk("CR: %08x\n", __FUNCTION__, *ccr);
+#endif
+
+        return 0;
+}