Richard Henderson 6399ab3325 tcg/i386: Use SHLX/SHRX/SARX instructions ... These three-operand shift instructions do not require the shift count to be placed into ECX. This reduces the number of mov insns required, with the mere addition of a new register constraint. Don't attempt to get rid of the matching constraint, as that's impossible to manipulate with just a new constraint. In addition, constant shifts still need the matching constraint. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>		2014-02-17 10:12:29 -06:00
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tcg-target.c	tcg/i386: Use SHLX/SHRX/SARX instructions	2014-02-17 10:12:29 -06:00
tcg-target.h	tcg/i386: Use ANDN instruction	2014-02-17 10:12:29 -06:00