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79dbabc175
Add unit tests for bswap insns. Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20230728011314.3720109-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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#if defined(__TARGET_ARCH_x86) && __clang_major__ >= 18
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SEC("socket")
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__description("BSWAP, 16")
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__success __success_unpriv __retval(0x23ff)
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__naked void bswap_16(void)
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{
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asm volatile (" \
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r0 = 0xff23; \
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r0 = bswap16 r0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("BSWAP, 32")
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__success __success_unpriv __retval(0x23ff0000)
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__naked void bswap_32(void)
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{
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asm volatile (" \
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r0 = 0xff23; \
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r0 = bswap32 r0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("BSWAP, 64")
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__success __success_unpriv __retval(0x34ff12ff)
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__naked void bswap_64(void)
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{
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asm volatile (" \
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r0 = %[u64_val] ll; \
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r0 = bswap64 r0; \
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exit; \
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" :
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: [u64_val]"i"(0xff12ff34ff56ff78ull)
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: __clobber_all);
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}
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#else
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SEC("socket")
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__description("cpuv4 is not supported by compiler or jit, use a dummy test")
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__success
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int dummy_test(void)
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{
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return 0;
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}
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#endif
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char _license[] SEC("license") = "GPL";
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