PATCH] int128: Check __SIZEOF_INT128__ instead of __WORDSIZE == 32

[H.J. Lu]

commit 8cd6efca5b3796193ef3ff60d9dbf6e5572b2b73
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Thu Nov 20 15:30:06 2025 -0300

    Add add_ssaaaa and sub_ssaaaa to gmp-arch.h

checks __WORDSIZE == 32 to decide if int128 can be used, which breaks
x32 which has int128 and __WORDSIZE == 32.  Check __SIZEOF_INT128__,
instead of __WORDSIZE == 32, for int128.  This fixes BZ #33677.


-- 
H.J.
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