target-ppc: VSX Stage 4: Add xsaddsp and xssubsp
This patch adds the VSX Scalar Add Single-Precision (xsaddsp) and VSX Scalar Subtract Single-Precision (xssubsp) instructions. The existing VSX_ADD_SUB macro is modified to support the rounding of the (intermediate) result to single-precision. Signed-off-by: NTom Musta <tommusta@gmail.com> Reviewed-by: NRichard Henderson <rth@twiddle.net> Signed-off-by: NAlexander Graf <agraf@suse.de>
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