tree 5aa60894bb89c588fe13eaae99fd5821e654498f
parent 838fa72d0b721766616e94a0f7dc76b15146cd82
author Peter Maydell <peter.maydell@linaro.org> 1294342673 +0000
committer Aurelien Jarno <aurelien@aurel32.net> 1294348619 +0100

softfloat: Implement flushing input denormals to zero

Add support to softfloat for flushing input denormal float32 and float64
to zero. softfloat's existing 'flush_to_zero' flag only flushes denormals
to zero on output. Some CPUs need input denormals to be flushed before
processing as well. Implement this, using a new status flag to enable it
and a new exception status bit to indicate when it has happened. Existing
CPUs should be unaffected as there is no behaviour change unless the
mode is enabled.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>