sh: math-emu support

This implements initial math-emu support, aimed primarily at SH-3.

Signed-off-by: Takashi YOSHII <takasi-y@ops.dti.ne.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index d1d724447826..07d6d699e9c2 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -339,6 +339,15 @@ config SH_FPU
 
           This option must be set in order to enable the FPU.
 
+config SH_FPU_EMU
+        bool "FPU emulation support"
+        depends on !SH_FPU && EXPERIMENTAL
+        default n
+        help
+          Selecting this option will enable support for software FPU emulation.
+          Most SH-3 users will want to say Y here, whereas most SH-4 users will
+          want to say N.
+
 config SH_DSP
         bool "DSP support"
         depends on !CPU_SH4