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include/generic/host: Fix atomic128-cas.h.inc for Int128 structure

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Use the Int128Alias structure more when we need to convert
between Int128 and __int128_t, when Int128 is a struct.

Fixes the build on aarch64 host with TCI, which forces
the use of the struct.

Reported-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2025-12-03 13:41:45 +00:00
parent 8c00f56fca
commit 6833615bfd
1 changed files with 15 additions and 9 deletions
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24
host/include/generic/host/atomic128-cas.h.inc
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@@ -34,39 +34,45 @@ static inline Int128 ATTRIBUTE_ATOMIC128_OPT
atomic16_xchg(Int128 *ptr, Int128 new)
{
__int128_t *ptr_align = __builtin_assume_aligned(ptr, 16);
Int128 old = *ptr_align;
Int128Alias o, n;
while (!__atomic_compare_exchange_n(ptr_align, &old, new, true,
n.s = new;
o.i = *ptr_align;
while (!__atomic_compare_exchange_n(ptr_align, &o.i, n.i, true,
__ATOMIC_SEQ_CST, 0)) {
continue;
}
return old;
return o.s;
}
static inline Int128 ATTRIBUTE_ATOMIC128_OPT
atomic16_fetch_and(Int128 *ptr, Int128 val)
{
__int128_t *ptr_align = __builtin_assume_aligned(ptr, 16);
Int128 old = *ptr_align;
Int128Alias o, v;
while (!__atomic_compare_exchange_n(ptr_align, &old, old & val, true,
v.s = val;
o.i = *ptr_align;
while (!__atomic_compare_exchange_n(ptr_align, &o.i, o.i & v.i, true,
__ATOMIC_SEQ_CST, 0)) {
continue;
}
return old;
return o.s;
}
static inline Int128 ATTRIBUTE_ATOMIC128_OPT
atomic16_fetch_or(Int128 *ptr, Int128 val)
{
__int128_t *ptr_align = __builtin_assume_aligned(ptr, 16);
Int128 old = *ptr_align;
Int128Alias o, v;
while (!__atomic_compare_exchange_n(ptr_align, &old, old | val, true,
v.s = val;
o.i = *ptr_align;
while (!__atomic_compare_exchange_n(ptr_align, &o.i, o.i | v.i, true,
__ATOMIC_SEQ_CST, 0)) {
continue;
}
return old;
return o.s;
}
# define HAVE_CMPXCHG128 1
#elif defined(CONFIG_CMPXCHG128)