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, 53 insertions, 0 deletions

diff --git a/arch/powerpc/math-emu/fdiv.c b/arch/powerpc/math-emu/fdiv.c
new file mode 100644
index 000000000000..f2fba825b2d0
--- /dev/null
+++ b/arch/powerpc/math-emu/fdiv.c
@@ -0,0 +1,53 @@
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+#include "soft-fp.h"
+#include "double.h"
+
+int
+fdiv(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)\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_ZERO && B_c == FP_CLS_ZERO) {
+		ret |= EFLAG_VXZDZ;
+#ifdef DEBUG
+		printk("%s: FPSCR_VXZDZ raised\n", __FUNCTION__);
+#endif
+	}
+	if (A_c == FP_CLS_INF && B_c == FP_CLS_INF) {
+		ret |= EFLAG_VXIDI;
+#ifdef DEBUG
+		printk("%s: FPSCR_VXIDI raised\n", __FUNCTION__);
+#endif
+	}
+
+	if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO) {
+		ret |= EFLAG_DIVZERO;
+		if (__FPU_TRAP_P(EFLAG_DIVZERO))
+			return ret;
+	}
+	FP_DIV_D(R, A, B);
+
+#ifdef DEBUG
+	printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
+#endif
+
+	return (ret | __FP_PACK_D(frD, R));
+}