cregit-Linux how code gets into the kernel

Release 4.14 arch/powerpc/lib/xor_vmx.c

Directory: arch/powerpc/lib
/*
 * 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 "xor_vmx.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; do { LOAD(v1); LOAD(v2); XOR(v1, v2); STORE(v1); v1 += 4; v2 += 4; } while (--lines > 0); }

Contributors

PersonTokensPropCommitsCommitProp
Anton Blanchard8498.82%150.00%
Matt Brown11.18%150.00%
Total85100.00%2100.00%


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; do { LOAD(v1); LOAD(v2); LOAD(v3); XOR(v1, v2); XOR(v1, v3); STORE(v1); v1 += 4; v2 += 4; v3 += 4; } while (--lines > 0); }

Contributors

PersonTokensPropCommitsCommitProp
Anton Blanchard11099.10%150.00%
Matt Brown10.90%150.00%
Total111100.00%2100.00%


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; 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); }

Contributors

PersonTokensPropCommitsCommitProp
Anton Blanchard13699.27%150.00%
Matt Brown10.73%150.00%
Total137100.00%2100.00%


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; 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); }

Contributors

PersonTokensPropCommitsCommitProp
Anton Blanchard16299.39%150.00%
Matt Brown10.61%150.00%
Total163100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Anton Blanchard53894.72%133.33%
Daniel Axtens254.40%133.33%
Matt Brown50.88%133.33%
Total568100.00%3100.00%
Directory: arch/powerpc/lib
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