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The VBROADCASTSD instruction only allows %ymm registers as destination. Rather than forcing VEX.L and writing to the entire 256-bit register, revert to using MOVDDUP with an %xmm register. This is sufficient for an avx1 host since we do not support TCG_TYPE_V256 for that case. Also fix the 32-bit avx2, which should have used VPBROADCASTW. Fixes: 1e262b49b533 Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>