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authorRichard Henderson <rth@twiddle.net>2013-09-19 12:16:45 -0700
committerRichard Henderson <rth@twiddle.net>2013-12-10 09:23:45 -0800
commit0ec9eabc7f6020418e1f3b3273d1dd701f7f87f9 (patch)
tree62149126b4a79d1d7cfa3f7aece7d97ad0865f13 /COPYING
parent8f84271da83c0e9f92aa7c1c2d0d3875bf0a5cb8 (diff)
tcg: Use bitmaps for free temporaries
We previously allocated 32-bits per temp for the next_free_temp entry. We now allocate 4 bits per temp across the 4 bitmaps. Using a linked list meant that if a translator is tweeked, resulting in temps being freed in a different order, that would have follow-on effects throughout the TB. Always allocating the lowest free temp means that follow-on effects are minimized, which can make it easier to diff output when debugging the translators. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
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