13.02.2024 05:21, Richard Henderson:
We need values 0-3 for TCG_TYPE_I128 on 32-bit hosts.
Cc: qemu-stable@nongnu.org
Fixes: 43eef72f4109 ("tcg: Add temp allocation for TCGv_i128")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2159
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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I feel certain that I made this change back when I introduced TCGv_i128.
I imagine that something went wrong with a rebase and it got lost.
Worse, we don't use temp_subindex often, and we usually handle i128
this value correctly. It took a quirk of register allocation ordering
to make an invalid value in temp_subindex lead to a crash.
Somehow it feels deja vue too, maybe we increased some other width like
this already, in stable series too, but I can't find it now.
"This" in "this value" should be omitted. With this fixed,