/* -*- 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.
 *
 * ----------------------------------------------------------------------- */

/*
 * raid6altivec$#.c
 *
 * $#-way unrolled portable integer math RAID-6 instruction set
 *
 * This file is postprocessed using unroll.awk
 *
 * <benh> hpa: in process,
 * you can just "steal" the vec unit with enable_kernel_altivec() (but
 * bracked this with preempt_disable/enable or in a lock)
 */

#include <linux/raid/pq.h>

#include <altivec.h>
#ifdef __KERNEL__
# include <asm/cputable.h>
# include <asm/switch_to.h>

/*
 * This is the C data type to use.  We use a vector of
 * signed char so vec_cmpgt() will generate the right
 * instruction.
 */

typedef vector signed char unative_t;

#define NBYTES(x) ((vector signed char) {x,x,x,x, x,x,x,x, x,x,x,x, x,x,x,x})
#define NSIZE	sizeof(unative_t)

/*
 * 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)
{
	return vec_add(v,v);
}

/*
 * 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 zv = NBYTES(0);

	/* vec_cmpgt returns a vector bool char; thus the need for the cast */
	return (unative_t)vec_cmpgt(zv, v);
}


/* This is noinline to make damned sure that gcc doesn't move any of the
   Altivec code around the enable/disable code */
static void noinline
raid6_altivec$#_gen_syndrome_real(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$$;
	unative_t x1d = NBYTES(0x1d);

	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+$$*NSIZE];
			wp$$ = vec_xor(wp$$, wd$$);
			w2$$ = MASK(wq$$);
			w1$$ = SHLBYTE(wq$$);
			w2$$ = vec_and(w2$$, x1d);
			w1$$ = vec_xor(w1$$, w2$$);
			wq$$ = vec_xor(w1$$, wd$$);
		}
		*(unative_t *)&p[d+NSIZE*$$] = wp$$;
		*(unative_t *)&q[d+NSIZE*$$] = wq$$;
	}
}

static void raid6_altivec$#_gen_syndrome(int disks, size_t bytes, void **ptrs)
{
	preempt_disable();
	enable_kernel_altivec();

	raid6_altivec$#_gen_syndrome_real(disks, bytes, ptrs);

	disable_kernel_altivec();
	preempt_enable();
}

int raid6_have_altivec(void);
#if $# == 1
int raid6_have_altivec(void)
{
	/* This assumes either all CPUs have Altivec or none does */
# ifdef __KERNEL__
	return cpu_has_feature(CPU_FTR_ALTIVEC);
# else
	return 1;
# endif
}
#endif

const struct raid6_calls raid6_altivec$# = {
	raid6_altivec$#_gen_syndrome,
	NULL,			/* XOR not yet implemented */
	raid6_have_altivec,
	"altivecx$#",
	0
};

#endif /* CONFIG_ALTIVEC */
f2dc29900a636c2d0d'>fusb300_udc.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/gadget/udc/fusb300_udc.h?id=7a92cc6bcbc90bf72e57eff2dc29900a636c2d0d&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
;'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-11-15 15:01:09 +0000</td></tr>
<tr><th>committer</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-11-15 15:22:10 +0000</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/9p?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>53a20465e6b674eb6ce594b0e9e8940495e95f33</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/9p?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>4d4c29c7c68ab2a1b69e4bd3903949356d2467e8</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/9p?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>net/9p</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/9p?id=1001354ca34179f3db924eb66672442a173147dc'>1001354ca34179f3db924eb66672442a173147dc</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/9p?id=53a20465e6b674eb6ce594b0e9e8940495e95f33&amp;id2=1001354ca34179f3db924eb66672442a173147dc'>diff</a>)</td></tr></table>
<div class='commit-subject'>regulator: pwm: Add missing quotes to DT example</div><div class='commit-msg'>Reported-by: Peter Rosin &lt;peda@axentia.se&gt;
Signed-off-by: Mark Brown &lt;broonie@kernel.org&gt;
Acked-by: Rob Herring &lt;robh@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>Diffstat</a> (limited to 'net/9p')</div><table summary='diffstat' class='diffstat'>