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| author | Richard Henderson <richard.henderson@linaro.org> | 2022-10-25 18:40:48 +1000 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-03-05 13:44:07 -0800 |
| commit | 5d133dd839e80e48702916b629c8b396e28611c8 (patch) | |
| tree | c3efe42bb4b656db1ae526f2dcfdc4e238a2a1d9 /util | |
| parent | 417aeaff542e6349694b6ebcdff127f926ec3c7e (diff) | |
| download | qemu-5d133dd839e80e48702916b629c8b396e28611c8.zip qemu-5d133dd839e80e48702916b629c8b396e28611c8.tar.gz qemu-5d133dd839e80e48702916b629c8b396e28611c8.tar.bz2 | |
include/qemu/cpuid: Introduce xgetbv_low
Replace the two uses of asm to expand xgetbv with an inline function.
Since one of the two has been using the mnemonic, assume that the
comment about "older versions of the assember" is obsolete, as even
that is 4 years old.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'util')
| -rw-r--r-- | util/bufferiszero.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/util/bufferiszero.c b/util/bufferiszero.c index 1790ded..1886bc5 100644 --- a/util/bufferiszero.c +++ b/util/bufferiszero.c @@ -258,8 +258,7 @@ static void __attribute__((constructor)) init_cpuid_cache(void) /* We must check that AVX is not just available, but usable. */ if ((c & bit_OSXSAVE) && (c & bit_AVX) && max >= 7) { - int bv; - __asm("xgetbv" : "=a"(bv), "=d"(d) : "c"(0)); + unsigned bv = xgetbv_low(0); __cpuid_count(7, 0, a, b, c, d); if ((bv & 0x6) == 0x6 && (b & bit_AVX2)) { cache |= CACHE_AVX2; |