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14cfe14626
Otherwise, the following error is observed:
src/util/cache_ops_x86_clflushopt.c:40:22:
error: arithmetic on a pointer to void is a GNU extension [-Werror,-Wgnu-pointer-arith]
40 | void *end = start + size;
| ~~~~~ ^
src/util/cache_ops_x86_clflushopt.c:44:9:
error: arithmetic on a pointer to void is a GNU extension [-Werror,-Wgnu-pointer-arith]
44 | p += cpu_caps->cacheline;
| ~ ^
This works with GNU extension enabled, but does lead to warnings
with Clang.
v2: Add to trial_c + trial_cpp checks (Erik)
v3: use c_msvc_compat_args to avoid fixing other instances of this issue (Erik)
Fixes: 555881e574 ("util/cache_ops: Add some cache flush helpers")
Reviewed-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Acked-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38752>
47 lines
1.8 KiB
C
47 lines
1.8 KiB
C
/*
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* Copyright © 2017 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <stdint.h>
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#include "util/u_cpu_detect.h"
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#ifndef HAVE___BUILTIN_IA32_CLFLUSHOPT
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#error "Compiler doesn't support clflushopt!"
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#endif
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void util_clflushopt_range(void *start, size_t size);
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void
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util_clflushopt_range(void *start, size_t size)
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{
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const struct util_cpu_caps_t *cpu_caps = util_get_cpu_caps();
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assert(cpu_caps->has_clflushopt);
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assert(cpu_caps->cacheline > 0);
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uint8_t *p = (uint8_t *) (((uintptr_t) start) &
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~((uintptr_t)cpu_caps->cacheline - 1));
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uint8_t *end = (uint8_t *)start + size;
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while (p < end) {
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__builtin_ia32_clflushopt(p);
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p += cpu_caps->cacheline;
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}
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}
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