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| author | Richard Henderson | 2017-07-19 06:40:18 +0200 |
|---|---|---|
| committer | Peter Maydell | 2017-07-24 13:42:55 +0200 |
| commit | 5dd8990841a9e331d9d4838a116291698208cbb6 (patch) | |
| tree | e2d46bda2138d892ebb1ecc210696d88f739008a /util | |
| parent | Merge remote-tracking branch 'remotes/sstabellini/tags/xen-20170721-tag' into... (diff) | |
| download | qemu-5dd8990841a9e331d9d4838a116291698208cbb6.tar.gz qemu-5dd8990841a9e331d9d4838a116291698208cbb6.tar.xz qemu-5dd8990841a9e331d9d4838a116291698208cbb6.zip | |
util: Introduce include/qemu/cpuid.h
Clang 3.9 passes the CONFIG_AVX2_OPT configure test. However, the
supplied <cpuid.h> does not contain the bit_AVX2 define that we use
when detecting whether the routine can be enabled.
Introduce a qemu-specific header that uses the compiler's definition
of __cpuid et al, but supplies any missing bit_* definitions needed.
This avoids introducing any extra ifdefs to util/bufferiszero.c, and
allows quite a few to be removed from tcg/i386/tcg-target.inc.c.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20170719044018.18063-1-rth@twiddle.net
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'util')
| -rw-r--r-- | util/bufferiszero.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/util/bufferiszero.c b/util/bufferiszero.c index eb974b7849..2178d8ab9d 100644 --- a/util/bufferiszero.c +++ b/util/bufferiszero.c @@ -197,7 +197,7 @@ buffer_zero_avx2(const void *buf, size_t len) /* Make sure that these variables are appropriately initialized when * SSE2 is enabled on the compiler command-line, but the compiler is - * too old to support <cpuid.h>. + * too old to support CONFIG_AVX2_OPT. */ #ifdef CONFIG_AVX2_OPT # define INIT_CACHE 0 @@ -231,7 +231,8 @@ static void init_accel(unsigned cache) } #ifdef CONFIG_AVX2_OPT -#include <cpuid.h> +#include "qemu/cpuid.h" + static void __attribute__((constructor)) init_cpuid_cache(void) { int max = __get_cpuid_max(0, NULL); @@ -243,7 +244,6 @@ static void __attribute__((constructor)) init_cpuid_cache(void) if (d & bit_SSE2) { cache |= CACHE_SSE2; } -#ifdef CONFIG_AVX2_OPT if (c & bit_SSE4_1) { cache |= CACHE_SSE4; } @@ -257,7 +257,6 @@ static void __attribute__((constructor)) init_cpuid_cache(void) cache |= CACHE_AVX2; } } -#endif } cpuid_cache = cache; init_accel(cache); |