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migration/xbzrle: Use __attribute__((target)) for avx512 

Use the attribute, which is supported by clang, instead of
the #pragma, which is not supported and, for some reason,
also not detected by the meson probe, so we fail by -Werror.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20230501210555.289806-1-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-05-01 22:05:55 +01:00
parent c407535385
commit dc165fcd4e
2 changed files with 5 additions and 9 deletions
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5
meson.build
View File

@ -2370,12 +2370,9 @@ config_host_data.set('CONFIG_AVX512F_OPT', get_option('avx512f') \
config_host_data.set('CONFIG_AVX512BW_OPT', get_option('avx512bw') \
.require(have_cpuid_h, error_message: 'cpuid.h not available, cannot enable AVX512BW') \
.require(cc.links('''
#pragma GCC push_options
#pragma GCC target("avx512bw")
#include <cpuid.h>
#include <immintrin.h>
static int bar(void *a) {
static int __attribute__((target("avx512bw"))) bar(void *a) {
__m512i *x = a;
__m512i res= _mm512_abs_epi8(*x);
return res[1];

9
migration/xbzrle.c
View File

@ -177,11 +177,11 @@ int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen)
}
#if defined(CONFIG_AVX512BW_OPT)
#pragma GCC push_options
#pragma GCC target("avx512bw")
#include <immintrin.h>
int xbzrle_encode_buffer_avx512(uint8_t *old_buf, uint8_t *new_buf, int slen,
uint8_t *dst, int dlen)
int __attribute__((target("avx512bw")))
xbzrle_encode_buffer_avx512(uint8_t *old_buf, uint8_t *new_buf, int slen,
uint8_t *dst, int dlen)
{
uint32_t zrun_len = 0, nzrun_len = 0;
int d = 0, i = 0, num = 0;
@ -296,5 +296,4 @@ int xbzrle_encode_buffer_avx512(uint8_t *old_buf, uint8_t *new_buf, int slen,
}
return d;
}
#pragma GCC pop_options
#endif