/* -*- linux-c -*- ------------------------------------------------------- * * * Copyright 2002-2004 H. Peter Anvin - All Rights Reserved * * 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, Inc., 53 Temple Place Ste 330, * Boston MA 02111-1307, USA; either version 2 of the License, or * (at your option) any later version; incorporated herein by reference. * * ----------------------------------------------------------------------- *//* * int$#.c * * $#-way unrolled portable integer math RAID-6 instruction set * * This file is postprocessed using unroll.awk */#include <linux/raid/pq.h>/* * This is the C data type to use *//* Change this from BITS_PER_LONG if there is something better... */#if BITS_PER_LONG == 64# define NBYTES(x) ((x) * 0x0101010101010101UL)# define NSIZE 8# define NSHIFT 3# define NSTRING "64"typedef u64 unative_t;#else# define NBYTES(x) ((x) * 0x01010101U)# define NSIZE 4# define NSHIFT 2# define NSTRING "32"typedef u32 unative_t;#endif/* * IA-64 wants insane amounts of unrolling. On other architectures that * is just a waste of space. */#if ($# <= 8) || defined(__ia64__)/* * These sub-operations are separate inlines since they can sometimes be * specially optimized using architecture-specific hacks. *//* * The SHLBYTE() operation shifts each byte left by 1, *not* * rolling over into the next byte */static inline __attribute_const__ unative_t SHLBYTE(unative_t v){ unative_t vv; vv = (v << 1) & NBYTES(0xfe); return vv;}/* * The MASK() operation returns 0xFF in any byte for which the high * bit is 1, 0x00 for any byte for which the high bit is 0. */static inline __attribute_const__ unative_t MASK(unative_t v){ unative_t vv; vv = v & NBYTES(0x80); vv = (vv << 1) - (vv >> 7); /* Overflow on the top bit is OK */ return vv;}static void raid6_int$#_gen_syndrome(int disks, size_t bytes, void **ptrs){ u8 **dptr = (u8 **)ptrs; u8 *p, *q; int d, z, z0; unative_t wd$$, wq$$, wp$$, w1$$, w2$$; z0 = disks - 3; /* Highest data disk */ p = dptr[z0+1]; /* XOR parity */ q = dptr[z0+2]; /* RS syndrome */ for ( d = 0 ; d < bytes ; d += NSIZE*$# ) { wq$$ = wp$$ = *(unative_t *)&dptr[z0][d+$$*NSIZE]; for ( z = z0-1 ; z >= 0 ; z-- ) { wd$$ = *(unative_t *)&dptr[z][d+$$*NSIZE]; wp$$ ^= wd$$; w2$$ = MASK(wq$$); w1$$ = SHLBYTE(wq$$); w2$$ &= NBYTES(0x1d); w1$$ ^= w2$$; wq$$ = w1$$ ^ wd$$; } *(unative_t *)&p[d+NSIZE*$$] = wp$$; *(unative_t *)&q[d+NSIZE*$$] = wq$$; }}static void raid6_int$#_xor_syndrome(int disks, int start, int stop, size_t bytes, void **ptrs){ u8 **dptr = (u8 **)ptrs; u8 *p, *q; int d, z, z0; unative_t wd$$, wq$$, wp$$, w1$$, w2$$; z0 = stop; /* P/Q right side optimization */ p = dptr[disks-2]; /* XOR parity */ q = dptr[disks-1]; /* RS syndrome */ for ( d = 0 ; d < bytes ; d += NSIZE*$# ) { /* P/Q data pages */ wq$$ = wp$$ = *(unative_t *)&dptr[z0][d+$$*NSIZE]; for ( z = z0-1 ; z >= start ; z-- ) { wd$$ = *(unative_t *)&dptr[z][d+$$*NSIZE]; wp$$ ^= wd$$; w2$$ = MASK(wq$$); w1$$ = SHLBYTE(wq$$); w2$$ &= NBYTES(0x1d); w1$$ ^= w2$$; wq$$ = w1$$ ^ wd$$; } /* P/Q left side optimization */ for ( z = start-1 ; z >= 0 ; z-- ) { w2$$ = MASK(wq$$); w1$$ = SHLBYTE(wq$$); w2$$ &= NBYTES(0x1d); wq$$ = w1$$ ^ w2$$; } *(unative_t *)&p[d+NSIZE*$$] ^= wp$$; *(unative_t *)&q[d+NSIZE*$$] ^= wq$$; }}const struct raid6_calls raid6_intx$# = { raid6_int$#_gen_syndrome, raid6_int$#_xor_syndrome, NULL, /* always valid */ "int" NSTRING "x$#", 0};#endif
/* -*- linux-c -*- ------------------------------------------------------- *
*
* Copyright 2002-2004 H. Peter Anvin - All Rights Reserved
*
* 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, Inc., 53 Temple Place Ste 330,
* Boston MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/*
* int$#.c
*
* $#-way unrolled portable integer math RAID-6 instruction set
*
* This file is postprocessed using unroll.awk
*/
#include <linux/raid/pq.h>
/*
* This is the C data type to use
*/
/* Change this from BITS_PER_LONG if there is something better... */
#if BITS_PER_LONG == 64
# define NBYTES(x) ((x) * 0x0101010101010101UL)
# define NSIZE 8
# define NSHIFT 3
# define NSTRING "64"
typedef u64 unative_t;
#else
# define NBYTES(x) ((x) * 0x01010101U)
# define NSIZE 4
# define NSHIFT 2
# define NSTRING "32"
typedef u32 unative_t;
#endif
/*
* IA-64 wants insane amounts of unrolling. On other architectures that
* is just a waste of space.
*/
#if ($# <= 8) || defined(__ia64__)
/*
* These sub-operations are separate inlines since they can sometimes be
* specially optimized using architecture-specific hacks.
*/
/*
* The SHLBYTE() operation shifts each byte left by 1, *not*
* rolling over into the next byte
*/
static inline __attribute_const__ unative_t SHLBYTE(unative_t v)
{
unative_t vv;
vv = (v << 1) & NBYTES(0xfe);
return vv;
}
/*
* The MASK() operation returns 0xFF in any byte for which the high
* bit is 1, 0x00 for any byte for which the high bit is 0.
*/
static inline __attribute_const__ unative_t MASK(unative_t v)
{
unative_t vv;
vv = v & NBYTES(0x80);
vv = (vv << 1) - (vv >> 7); /* Overflow on the top bit is OK */
return vv;
}
static void raid6_int$#_gen_syndrome(int disks, size_t bytes, void **ptrs)
{
u8 **dptr = (u8 **)ptrs;
u8 *p, *q;
int d, z, z0;
unative_t wd$$, wq$$, wp$$, w1$$, w2$$;
z0 = disks - 3; /* Highest data disk */
p = dptr[z0+1]; /* XOR parity */
q = dptr[z0+2]; /* RS syndrome */
for ( d = 0 ; d < bytes ; d += NSIZE*$# ) {
wq$$ = wp$$ = *(unative_t *)&dptr[z0][d+$$*NSIZE];
for ( z = z0-1 ; z >= 0 ; z-- ) {
wd$$ = *(unative_t *)&dptr[z][d+$$*NSIZE];
wp$$ ^= wd$$;
w2$$ = MASK(wq$$);
w1$$ = SHLBYTE(wq$$);
w2$$ &= NBYTES(0x1d);
w1$$ ^= w2$$;
wq$$ = w1$$ ^ wd$$;
}
*(unative_t *)&p[d+NSIZE*$$] = wp$$;
*(unative_t *)&q[d+NSIZE*$$] = wq$$;
}
}
static void raid6_int$#_xor_syndrome(int disks, int start, int stop,
size_t bytes, void **ptrs)
{
u8 **dptr = (u8 **)ptrs;
u8 *p, *q;
int d, z, z0;
unative_t wd$$, wq$$, wp$$, w1$$, w2$$;
z0 = stop; /* P/Q right side optimization */
p = dptr[disks-2]; /* XOR parity */
q = dptr[disks-1]; /* RS syndrome */
for ( d = 0 ; d < bytes ; d += NSIZE*$# ) {
/* P/Q data pages */
wq$$ = wp$$ = *(unative_t *)&dptr[z0][d+$$*NSIZE];
for ( z = z0-1 ; z >= start ; z-- ) {
wd$$ = *(unative_t *)&dptr[z][d+$$*NSIZE];
wp$$ ^= wd$$;
w2$$ = MASK(wq$$);
w1$$ = SHLBYTE(wq$$);
w2$$ &= NBYTES(0x1d);
w1$$ ^= w2$$;
wq$$ = w1$$ ^ wd$$;
}
/* P/Q left side optimization */
for ( z = start-1 ; z >= 0 ; z-- ) {
w2$$ = MASK(wq$$);
w1$$ = SHLBYTE(wq$$);
w2$$ &= NBYTES(0x1d);
wq$$ = w1$$ ^ w2$$;
}
*(unative_t *)&p[d+NSIZE*$$] ^= wp$$;
*(unative_t *)&q[d+NSIZE*$$] ^= wq$$;
}
}
const struct raid6_calls raid6_intx$# = {
raid6_int$#_gen_syndrome,
raid6_int$#_xor_syndrome,
NULL, /* always valid */
"int" NSTRING "x$#",
0
};
#endif