1 files changed, 46 insertions, 0 deletions

diff --git a/arch/powerpc/math-emu/fcmpo.c b/arch/powerpc/math-emu/fcmpo.c
new file mode 100644
index 000000000000..4efac394b4cb
--- /dev/null
+++ b/arch/powerpc/math-emu/fcmpo.c
@@ -0,0 +1,46 @@
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+#include "soft-fp.h"
+#include "double.h"
+
+int
+fcmpo(u32 *ccr, int crfD, void *frA, void *frB)
+{
+        FP_DECL_D(A);
+        FP_DECL_D(B);
+        int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) };
+        long cmp;
+        int ret = 0;
+
+#ifdef DEBUG
+        printk("%s: %p (%08x) %d %p %p\n", __FUNCTION__, ccr, *ccr, crfD, frA, frB);
+#endif
+
+        __FP_UNPACK_D(A, frA);
+        __FP_UNPACK_D(B, frB);
+
+#ifdef DEBUG
+        printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
+        printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
+#endif
+
+        if (A_c == FP_CLS_NAN || B_c == FP_CLS_NAN)
+                ret |= EFLAG_VXVC;
+
+        FP_CMP_D(cmp, A, B, 2);
+        cmp = code[(cmp + 1) & 3];
+
+        __FPU_FPSCR &= ~(0x1f000);
+        __FPU_FPSCR |= (cmp << 12);
+
+        *ccr &= ~(15 << ((7 - crfD) << 2));
+        *ccr |= (cmp << ((7 - crfD) << 2));
+
+#ifdef DEBUG
+        printk("CR: %08x\n", *ccr);
+#endif
+
+        return ret;
+}