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[asm] Share portability macros and restrict ASM further

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Move portability macros to `lib/common/portability_macros.h`. This file
only contains platform/feature detection (e.g. 0/1 macros). This file is
shared between C and ASM code, so it cannot include any C code.

Rename `HUF_` ASM macros to be `ZSTD_` prefixed, and move to the new
header.

Restrict `ZSTD_ASM_SUPPORTED` to `__GNUC__`, because we need the GAS
assembler.

Finally, only include the ASM code if we are actually going to use it.
This disables it on all Windows platforms, which should resolve the
problem brought up in Issue #2789.
This commit is contained in:
Nick Terrell
2021-12-01 12:52:23 -08:00
parent 647c1b6615
commit c284569457
8 changed files with 155 additions and 103 deletions
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build/single_file_libs/zstd-in.c
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@@ -44,7 +44,7 @@
#endif
#define ZSTD_TRACE 0
/* TODO: Can't amalgamate ASM function */
#define HUF_DISABLE_ASM 1
#define ZSTD_DISABLE_ASM 1
/* Include zstd_deps.h first with all the options we need enabled. */
#define ZSTD_DEPS_NEED_MALLOC