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x64: Fix callback result handling.

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Reported by Matt Gerassimoff.
This commit is contained in:
Mike Pall 2026-07-11 14:37:49 +02:00
parent 295d45fb26
commit 859ad934bc
1 changed files with 4 additions and 0 deletions
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4
src/lj_ccallback.c
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@ -519,6 +519,10 @@ static void callback_conv_result(CTState *cts, lua_State *L, TValue *o)
#if LJ_TARGET_X86 #if LJ_TARGET_X86
if (ctype_isfp(ctr->info)) if (ctype_isfp(ctr->info))
cts->cb.gpr[2] = ctr->size == sizeof(float) ? 1 : 2; cts->cb.gpr[2] = ctr->size == sizeof(float) ? 1 : 2;
#elif LJ_TARGET_X64
/* Always zero-extend results to 64 bits. */
if (ctr->size <= 4 && ctype_isinteger_or_bool(ctr->info))
*(uint64_t *)dp = (uint64_t)*(uint32_t *)dp;
#endif #endif
} }
} }