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authorKent Overstreet <kent.overstreet@linux.dev>2024-01-16 17:00:02 -0500
committerKent Overstreet <kent.overstreet@linux.dev>2024-01-16 17:17:23 -0500
commitb5fd066153c40a70a29caa1ea7987723ab687763 (patch)
tree6d43a8b0a90d549a54c65565ac96c92b3e84b594 /c_src/raid/gf.h
parent06ff8b55b70fda44d91b31b5511fafd1680a8934 (diff)
Move c_src dirs back to toplevel
We just wanted c sourcefiles out of the top level, not c source directories. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'c_src/raid/gf.h')
-rw-r--r--c_src/raid/gf.h137
1 files changed, 0 insertions, 137 deletions
diff --git a/c_src/raid/gf.h b/c_src/raid/gf.h
deleted file mode 100644
index 1702c287..00000000
--- a/c_src/raid/gf.h
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * Copyright (C) 2013 Andrea Mazzoleni
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#ifndef __RAID_GF_H
-#define __RAID_GF_H
-
-/*
- * Galois field operations.
- *
- * Basic range checks are implemented using BUG_ON().
- */
-
-/*
- * GF a*b.
- */
-static __always_inline uint8_t mul(uint8_t a, uint8_t b)
-{
- return gfmul[a][b];
-}
-
-/*
- * GF 1/a.
- * Not defined for a == 0.
- */
-static __always_inline uint8_t inv(uint8_t v)
-{
- BUG_ON(v == 0); /* division by zero */
-
- return gfinv[v];
-}
-
-/*
- * GF 2^a.
- */
-static __always_inline uint8_t pow2(int v)
-{
- BUG_ON(v < 0 || v > 254); /* invalid exponent */
-
- return gfexp[v];
-}
-
-/*
- * Gets the multiplication table for a specified value.
- */
-static __always_inline const uint8_t *table(uint8_t v)
-{
- return gfmul[v];
-}
-
-/*
- * Gets the generator matrix coefficient for parity 'p' and disk 'd'.
- */
-static __always_inline uint8_t A(int p, int d)
-{
- return gfgen[p][d];
-}
-
-/*
- * Dereference as uint8_t
- */
-#define v_8(p) (*(uint8_t *)&(p))
-
-/*
- * Dereference as uint32_t
- */
-#define v_32(p) (*(uint32_t *)&(p))
-
-/*
- * Dereference as uint64_t
- */
-#define v_64(p) (*(uint64_t *)&(p))
-
-/*
- * Multiply each byte of a uint32 by 2 in the GF(2^8).
- */
-static __always_inline uint32_t x2_32(uint32_t v)
-{
- uint32_t mask = v & 0x80808080U;
-
- mask = (mask << 1) - (mask >> 7);
- v = (v << 1) & 0xfefefefeU;
- v ^= mask & 0x1d1d1d1dU;
- return v;
-}
-
-/*
- * Multiply each byte of a uint64 by 2 in the GF(2^8).
- */
-static __always_inline uint64_t x2_64(uint64_t v)
-{
- uint64_t mask = v & 0x8080808080808080ULL;
-
- mask = (mask << 1) - (mask >> 7);
- v = (v << 1) & 0xfefefefefefefefeULL;
- v ^= mask & 0x1d1d1d1d1d1d1d1dULL;
- return v;
-}
-
-/*
- * Divide each byte of a uint32 by 2 in the GF(2^8).
- */
-static __always_inline uint32_t d2_32(uint32_t v)
-{
- uint32_t mask = v & 0x01010101U;
-
- mask = (mask << 8) - mask;
- v = (v >> 1) & 0x7f7f7f7fU;
- v ^= mask & 0x8e8e8e8eU;
- return v;
-}
-
-/*
- * Divide each byte of a uint64 by 2 in the GF(2^8).
- */
-static __always_inline uint64_t d2_64(uint64_t v)
-{
- uint64_t mask = v & 0x0101010101010101ULL;
-
- mask = (mask << 8) - mask;
- v = (v >> 1) & 0x7f7f7f7f7f7f7f7fULL;
- v ^= mask & 0x8e8e8e8e8e8e8e8eULL;
- return v;
-}
-
-#endif
-