powerpc: move math-emu over to arch/powerpc

Towards the goal of having arch/powerpc not build anything over in arch/ppc
move math-emu over.  Also, killed some references to arch/ppc/ in the
arch/powerpc Makefile which should belong in drivers/ when the particular
sub-arch's move over to arch/powerpc.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/arch/powerpc/math-emu/fmul.c b/arch/powerpc/math-emu/fmul.c
new file mode 100644
index 00000000000..66c7e79aae2
--- /dev/null
+++ b/arch/powerpc/math-emu/fmul.c
@@ -0,0 +1,42 @@
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+#include "soft-fp.h"
+#include "double.h"
+
+int
+fmul(void *frD, void *frA, void *frB)
+{
+        FP_DECL_D(A);
+        FP_DECL_D(B);
+        FP_DECL_D(R);
+        int ret = 0;
+
+#ifdef DEBUG
+        printk("%s: %p %p %p\n", __FUNCTION__, frD, frA, frB);
+#endif
+
+        __FP_UNPACK_D(A, frA);
+        __FP_UNPACK_D(B, frB);
+
+#ifdef DEBUG
+        printk("A: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
+               A_s, A_f1, A_f0, A_e, A_c, A_f1, A_f0, A_e + 1023);
+        printk("B: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
+               B_s, B_f1, B_f0, B_e, B_c, B_f1, B_f0, B_e + 1023);
+#endif
+
+        if ((A_c == FP_CLS_INF && B_c == FP_CLS_ZERO) ||
+            (A_c == FP_CLS_ZERO && B_c == FP_CLS_INF))
+                ret |= EFLAG_VXIMZ;
+
+        FP_MUL_D(R, A, B);
+
+#ifdef DEBUG
+        printk("D: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
+               R_s, R_f1, R_f0, R_e, R_c, R_f1, R_f0, R_e + 1023);
+#endif
+
+        return (ret | __FP_PACK_D(frD, R));
+}