52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
#ifndef CRYPTONITE_ALIGN_H
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#define CRYPTONITE_ALIGN_H
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#include "cryptonite_bitfn.h"
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#if (defined(__i386__))
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# define UNALIGNED_ACCESS_OK
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#elif defined(__x86_64__)
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# define UNALIGNED_ACCESS_OK
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#else
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# define UNALIGNED_ACCESS_FAULT
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#endif
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/* n need to be power of 2.
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* IS_ALIGNED(p,8) */
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#define IS_ALIGNED(p,alignment) (((uintptr_t) (p)) & ((alignment)-1))
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#ifdef WITH_ASSERT_ALIGNMENT
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#include <stdio.h>
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#include <stdlib.h>
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#include <inttypes.h>
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# define ASSERT_ALIGNMENT(up, alignment) \
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do { if (IS_ALIGNED(up, alignment)) \
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{ printf("ALIGNMENT-ASSERT-FAILURE: %s:%d: ptr=%p alignment=%d\n", __FILE__, __LINE__, (void *) up, (alignment)); \
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exit(99); \
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}; } while (0)
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#else
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# define ASSERT_ALIGNMENT(p, n) do {} while (0)
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#endif
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#ifdef UNALIGNED_ACCESS_OK
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#define need_alignment(p,n) (0)
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#else
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#define need_alignment(p,n) IS_ALIGNED(p,n)
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#endif
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static inline uint32_t load_le32_aligned(const uint8_t *p)
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{
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return le32_to_cpu(*((uint32_t *) p));
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}
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#ifdef UNALIGNED_ACCESS_OK
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#define load_le32(a) load_le32_aligned(a)
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#else
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static inline uint32_t load_le32(const uint8_t *p)
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{
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return ((uint32_t)p[0]) | ((uint32_t)p[1] << 8) | ((uint32_t)p[2] << 16) | ((uint32_t)p[3] << 24);
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}
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#endif
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#endif
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