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>

1 files changed, 32 insertions, 0 deletions

diff --git a/include/asm-sh/cpu-sh4/fpu.h b/include/asm-sh/cpu-sh4/fpu.h
new file mode 100644
index 000000000000..febef7342528
--- /dev/null
+++ b/include/asm-sh/cpu-sh4/fpu.h
@@ -0,0 +1,32 @@
+/*
+ * 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