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[gamesource] Work around a windows gcc bug

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The bug (alignment issues with AVX on windows) seems to have in gcc from
the 4.x days, and is still present in 11.2: it does not ensure stack
parameters that need 32 byte alignment are aligned. Telling gcc to use
the sysv abi (safe on a static function) lets gcc do what it does for
linux (usually pass the parameters in registers, which it seems to have
done).
This commit is contained in:
Bill Currie 2022-01-06 22:21:24 +09:00
parent c3317f8e5e
commit 0d9294d541
1 changed files with 5 additions and 0 deletions
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5
libs/gamecode/pr_exec.c
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@ -2261,6 +2261,11 @@ negate:
}
static pr_lvec4_t
#ifdef _WIN64
//force gcc to use registers for the parameters to avoid alignment issues
//on the stack (gcc bug as of 11.2)
__attribute__((sysv_abi))
#endif
pr_swizzle_d (pr_lvec4_t vec, pr_ushort_t swiz)
{
goto do_swizzle;