Release 4.11 arch/powerpc/lib/xor_vmx.c

/*
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * Copyright (C) IBM Corporation, 2012
 *
 * Author: Anton Blanchard <anton@au.ibm.com>
 */

/*
 * Sparse (as at v0.5.0) gets very, very confused by this file.
 * Make it a bit simpler for it.
 */
#if !defined(__CHECKER__)
#include <altivec.h>
#else

#define vec_xor(a, b) a ^ b

#define vector __attribute__((vector_size(16)))
#endif

#include <linux/preempt.h>
#include <linux/export.h>
#include <linux/sched.h>
#include <asm/switch_to.h>


typedef vector signed char unative_t;


#define DEFINE(V)				\
	unative_t *V = (unative_t *)V##_in;     \
        unative_t V##_0, V##_1, V##_2, V##_3


#define LOAD(V)			\
	do {                    \
                V##_0 = V[0];   \
                V##_1 = V[1];   \
                V##_2 = V[2];   \
                V##_3 = V[3];   \
        } while (0)


#define STORE(V)		\
	do {                    \
                V[0] = V##_0;   \
                V[1] = V##_1;   \
                V[2] = V##_2;   \
                V[3] = V##_3;   \
        } while (0)


#define XOR(V1, V2)					\
	do {                                            \
                V1##_0 = vec_xor(V1##_0, V2##_0);       \
                V1##_1 = vec_xor(V1##_1, V2##_1);       \
                V1##_2 = vec_xor(V1##_2, V2##_2);       \
                V1##_3 = vec_xor(V1##_3, V2##_3);       \
        } while (0)



void xor_altivec_2(unsigned long bytes, unsigned long *v1_in,
		   unsigned long *v2_in)
{
	DEFINE(v1);
	DEFINE(v2);
	unsigned long lines = bytes / (sizeof(unative_t)) / 4;

	preempt_disable();
	enable_kernel_altivec();

	do {
		LOAD(v1);
		LOAD(v2);
		XOR(v1, v2);
		STORE(v1);

		v1 += 4;
		v2 += 4;
	} while (--lines > 0);

	disable_kernel_altivec();
	preempt_enable();
}
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EXPORT_SYMBOL(xor_altivec_2);



void xor_altivec_3(unsigned long bytes, unsigned long *v1_in,
		   unsigned long *v2_in, unsigned long *v3_in)
{
	DEFINE(v1);
	DEFINE(v2);
	DEFINE(v3);
	unsigned long lines = bytes / (sizeof(unative_t)) / 4;

	preempt_disable();
	enable_kernel_altivec();

	do {
		LOAD(v1);
		LOAD(v2);
		LOAD(v3);
		XOR(v1, v2);
		XOR(v1, v3);
		STORE(v1);

		v1 += 4;
		v2 += 4;
		v3 += 4;
	} while (--lines > 0);

	disable_kernel_altivec();
	preempt_enable();
}
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EXPORT_SYMBOL(xor_altivec_3);



void xor_altivec_4(unsigned long bytes, unsigned long *v1_in,
		   unsigned long *v2_in, unsigned long *v3_in,
		   unsigned long *v4_in)
{
	DEFINE(v1);
	DEFINE(v2);
	DEFINE(v3);
	DEFINE(v4);
	unsigned long lines = bytes / (sizeof(unative_t)) / 4;

	preempt_disable();
	enable_kernel_altivec();

	do {
		LOAD(v1);
		LOAD(v2);
		LOAD(v3);
		LOAD(v4);
		XOR(v1, v2);
		XOR(v3, v4);
		XOR(v1, v3);
		STORE(v1);

		v1 += 4;
		v2 += 4;
		v3 += 4;
		v4 += 4;
	} while (--lines > 0);

	disable_kernel_altivec();
	preempt_enable();
}
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EXPORT_SYMBOL(xor_altivec_4);



void xor_altivec_5(unsigned long bytes, unsigned long *v1_in,
		   unsigned long *v2_in, unsigned long *v3_in,
		   unsigned long *v4_in, unsigned long *v5_in)
{
	DEFINE(v1);
	DEFINE(v2);
	DEFINE(v3);
	DEFINE(v4);
	DEFINE(v5);
	unsigned long lines = bytes / (sizeof(unative_t)) / 4;

	preempt_disable();
	enable_kernel_altivec();

	do {
		LOAD(v1);
		LOAD(v2);
		LOAD(v3);
		LOAD(v4);
		LOAD(v5);
		XOR(v1, v2);
		XOR(v3, v4);
		XOR(v1, v5);
		XOR(v1, v3);
		STORE(v1);

		v1 += 4;
		v2 += 4;
		v3 += 4;
		v4 += 4;
		v5 += 4;
	} while (--lines > 0);

	disable_kernel_altivec();
	preempt_enable();
}
Contributors
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CommitProp
Anton Blanchard
175
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175
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EXPORT_SYMBOL(xor_altivec_5);
Overall Contributors
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1
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Total
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Directory: arch/powerpc/lib

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