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dd8398a3c6
* sha512.m4 (gl_SHA512): Add u64.h to AC_LIBSOURCES. [lib/ChangeLog] Port sha512sum to hosts where uintmax_t is only 32 bits, e.g., HP/Tandom NonStop OSS circa 2005 has 32-bit uintmax_t, 64-bit intmax_t. * u64.h: New file. * sha512.c (SWAP, sha512_init_ctx, sha384_init_ctx, sha512_read_ctx): (sha384_read_ctx, sha512_conclude_ctx, sha512_process_bytes): (sha512_round_constants, F2, F1, sha512_process_block): (S0, S1, SS0, SS1, M, R): Rewrite to use u64.h instead of assuming uint64_t. * sha512.h: Include u64.h rather than stdint.h. (rol64): Remove; moved to u64.h and renamed to u64rol.
161 lines
3.3 KiB
C
161 lines
3.3 KiB
C
/* uint64_t-like operations that work even on hosts lacking uint64_t
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Copyright (C) 2006 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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/* Written by Paul Eggert. */
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#include <stddef.h>
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#include <stdint.h>
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/* Return X rotated left by N bits, where 0 < N < 64. */
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#define u64rol(x, n) u64or (u64shl (x, n), u64shr (x, 64 - n))
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#ifdef UINT64_MAX
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/* Native implementations are trivial. See below for comments on what
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these operations do. */
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typedef uint64_t u64;
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# define u64hilo(hi, lo) ((u64) (((u64) (hi) << 32) + (lo)))
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# define u64init(hi, lo) u64hilo (hi, lo)
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# define u64lo(x) ((u64) (x))
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# define u64lt(x, y) ((x) < (y))
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# define u64and(x, y) ((x) & (y))
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# define u64or(x, y) ((x) | (y))
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# define u64xor(x, y) ((x) ^ (y))
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# define u64plus(x, y) ((x) + (y))
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# define u64shl(x, n) ((x) << (n))
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# define u64shr(x, n) ((x) >> (n))
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#else
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/* u64 is a 64-bit unsigned integer value.
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u64init (HI, LO), is like u64hilo (HI, LO), but for use in
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initializer contexts. */
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# ifdef WORDS_BIGENDIAN
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typedef struct { uint32_t hi, lo; } u64;
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# define u64init(hi, lo) { hi, lo }
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# else
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typedef struct { uint32_t lo, hi; } u64;
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# define u64init(hi, lo) { lo, hi }
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# endif
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/* Given the high and low-order 32-bit quantities HI and LO, return a u64
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value representing (HI << 32) + LO. */
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static inline u64
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u64hilo (uint32_t hi, uint32_t lo)
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{
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u64 r;
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r.hi = hi;
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r.lo = lo;
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return r;
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}
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/* Return a u64 value representing LO. */
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static inline u64
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u64lo (uint32_t lo)
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{
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u64 r;
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r.hi = 0;
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r.lo = lo;
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return r;
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}
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/* Return X < Y. */
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static inline int
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u64lt (u64 x, u64 y)
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{
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return x.hi < y.hi || (x.hi == y.hi && x.lo < y.lo);
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}
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/* Return X & Y. */
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static inline u64
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u64and (u64 x, u64 y)
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{
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u64 r;
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r.hi = x.hi & y.hi;
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r.lo = x.lo & y.lo;
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return r;
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}
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/* Return X | Y. */
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static inline u64
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u64or (u64 x, u64 y)
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{
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u64 r;
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r.hi = x.hi | y.hi;
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r.lo = x.lo | y.lo;
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return r;
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}
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/* Return X ^ Y. */
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static inline u64
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u64xor (u64 x, u64 y)
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{
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u64 r;
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r.hi = x.hi ^ y.hi;
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r.lo = x.lo ^ y.lo;
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return r;
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}
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/* Return X + Y. */
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static inline u64
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u64plus (u64 x, u64 y)
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{
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u64 r;
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r.lo = x.lo + y.lo;
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r.hi = x.hi + y.hi + (r.lo < x.lo);
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return r;
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}
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/* Return X << N. */
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static inline u64
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u64shl (u64 x, int n)
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{
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u64 r;
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if (n < 32)
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{
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r.hi = (x.hi << n) | (x.lo >> (32 - n));
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r.lo = x.lo << n;
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}
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else
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{
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r.hi = x.lo << (n - 32);
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r.lo = 0;
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}
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return r;
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}
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/* Return X >> N. */
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static inline u64
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u64shr (u64 x, int n)
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{
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u64 r;
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if (n < 32)
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{
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r.hi = x.hi >> n;
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r.lo = (x.hi << (32 - n)) | (x.lo >> n);
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}
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else
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{
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r.hi = 0;
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r.lo = x.hi >> (n - 32);
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}
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return r;
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}
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#endif
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