mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
0a24b4fc3c
The *NSYNC linked list API is good enough that it deserves to be part of the C libray, so this change writes an improved version of it which uses that offsetof() trick from the Linux Kernel. We vendor all of the *NSYNC tests in third_party which helped confirm the needed refactoring is safe This change also deletes more old code that didn't pan out. My goal here is to work towards a vision where the Cosmopolitan core libraries become less experimental and more focused on curation. This better reflects the current level of quality we've managed to achieve.
108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
#ifndef COSMOPOLITAN_LIBC_BITS_H_
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#define COSMOPOLITAN_LIBC_BITS_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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#ifdef COSMO
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int _bitreverse8(int) pureconst;
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int _bitreverse16(int) pureconst;
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uint32_t _bitreverse32(uint32_t) pureconst;
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uint64_t _bitreverse64(uint64_t) pureconst;
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unsigned long _roundup2pow(unsigned long) pureconst;
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unsigned long _roundup2log(unsigned long) pureconst;
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unsigned long _rounddown2pow(unsigned long) pureconst;
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#define READ16LE(P) \
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(__extension__({ \
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uint16_t __x; \
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__builtin_memcpy(&__x, P, 16 / 8); \
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__x; \
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}))
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#define READ16BE(P) \
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(__extension__({ \
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uint16_t __x; \
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__builtin_memcpy(&__x, P, 16 / 8); \
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__builtin_bswap16(__x); \
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}))
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#define READ32LE(P) \
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(__extension__({ \
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uint32_t __x; \
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__builtin_memcpy(&__x, P, 32 / 8); \
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__x; \
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}))
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#define READ32BE(P) \
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(__extension__({ \
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uint32_t __x; \
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__builtin_memcpy(&__x, P, 32 / 8); \
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__builtin_bswap32(__x); \
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}))
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#define READ64LE(P) \
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(__extension__({ \
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uint64_t __x; \
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__builtin_memcpy(&__x, P, 64 / 8); \
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__x; \
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}))
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#define READ64BE(P) \
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(__extension__({ \
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uint64_t __x; \
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__builtin_memcpy(&__x, P, 64 / 8); \
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__builtin_bswap64(__x); \
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}))
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#define WRITE16LE(P, X) \
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(__extension__({ \
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__typeof__(&(P)[0]) __p = (P); \
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uint16_t __x = (X); \
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__builtin_memcpy(__p, &__x, 16 / 8); \
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__p + 16 / 8; \
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}))
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#define WRITE16BE(P, X) \
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(__extension__({ \
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__typeof__(&(P)[0]) __p = (P); \
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uint16_t __x = __builtin_bswap16(X); \
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__builtin_memcpy(__p, &__x, 16 / 8); \
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__p + 16 / 8; \
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}))
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#define WRITE32LE(P, X) \
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(__extension__({ \
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__typeof__(&(P)[0]) __p = (P); \
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uint32_t __x = (X); \
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__builtin_memcpy(__p, &__x, 32 / 8); \
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__p + 32 / 8; \
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}))
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#define WRITE32BE(P, X) \
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(__extension__({ \
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__typeof__(&(P)[0]) __p = (P); \
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uint32_t __x = __builtin_bswap32(X); \
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__builtin_memcpy(__p, &__x, 32 / 8); \
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__p + 32 / 8; \
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}))
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#define WRITE64LE(P, X) \
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(__extension__({ \
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__typeof__(&(P)[0]) __p = (P); \
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uint64_t __x = (X); \
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__builtin_memcpy(__p, &__x, 64 / 8); \
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__p + 64 / 8; \
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}))
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#define WRITE64BE(P, X) \
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(__extension__({ \
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__typeof__(&(P)[0]) __p = (P); \
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uint64_t __x = __builtin_bswap64(X); \
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__builtin_memcpy(__p, &__x, 64 / 8); \
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__p + 64 / 8; \
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}))
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#endif /* COSMO */
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_BITS_H_ */
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