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These changes are necessary to get the build to work in the preboot environment, and to get reasonable performance: - Remove a double definition of the CHECK_F macro when the zstd library is amalgamated. - Switch ZSTD_copy8() to __builtin_memcpy(), because in the preboot environment on x86 gcc can't inline `memcpy()` otherwise. - Limit the gcc hack in ZSTD_wildcopy() to the broken gcc version. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81388. ZSTD_copy8() and ZSTD_wildcopy() are in the core of the zstd hot loop. So outlining these calls to memcpy(), and having an extra branch are very detrimental to performance. Signed-off-by: Nick Terrell <terrelln@fb.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20200730190841.2071656-2-nickrterrell@gmail.com |
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| .. | ||
| bitstream.h | ||
| compress.c | ||
| decompress.c | ||
| entropy_common.c | ||
| error_private.h | ||
| fse_compress.c | ||
| fse_decompress.c | ||
| fse.h | ||
| huf_compress.c | ||
| huf_decompress.c | ||
| huf.h | ||
| Makefile | ||
| mem.h | ||
| zstd_common.c | ||
| zstd_internal.h | ||
| zstd_opt.h | ||