sh: Support denormalization on SH-4 FPU.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/cpu/sh4/Makefile

@@ -5,7 +5,7 @@
 obj-y	:= probe.o common.o
 common-y	+= $(addprefix ../sh3/, entry.o ex.o)
 
-obj-$(CONFIG_SH_FPU)			+= fpu.o
+obj-$(CONFIG_SH_FPU)			+= fpu.o softfloat.o
 obj-$(CONFIG_SH_STORE_QUEUES)		+= sq.o
 
 # CPU subtype setup

include/asm-sh/cpu-sh4/fpu.h

+/*
+ * linux/arch/sh/kernel/cpu/sh4/sh4_fpu.h
+ *
+ * Copyright (C) 2006 STMicroelectronics Limited
+ * Author: Carl Shaw <carl.shaw@st.com>
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License Version 2.  See linux/COPYING for more information.
+ *
+ * Definitions for SH4 FPU operations
+ */
+
+#ifndef __CPU_SH4_FPU_H
+#define __CPU_SH4_FPU_H
+
+#define FPSCR_ENABLE_MASK	0x00000f80UL
+
+#define FPSCR_FMOV_DOUBLE	(1<<1)
+
+#define FPSCR_CAUSE_INEXACT	(1<<12)
+#define FPSCR_CAUSE_UNDERFLOW	(1<<13)
+#define FPSCR_CAUSE_OVERFLOW	(1<<14)
+#define FPSCR_CAUSE_DIVZERO	(1<<15)
+#define FPSCR_CAUSE_INVALID	(1<<16)
+#define FPSCR_CAUSE_ERROR 	(1<<17)
+
+#define FPSCR_DBL_PRECISION	(1<<19)
+#define FPSCR_ROUNDING_MODE(x)	((x >> 20) & 3)
+#define FPSCR_RM_NEAREST	(0)
+#define FPSCR_RM_ZERO		(1)
+
+#endif