// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 * 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 * __restrict v1_in,
                     const unsigned long * __restrict 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);
}

void __xor_altivec_3(unsigned long bytes,
                     unsigned long * __restrict v1_in,
                     const unsigned long * __restrict v2_in,
                     const unsigned long * __restrict 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);
}

void __xor_altivec_4(unsigned long bytes,
                     unsigned long * __restrict v1_in,
                     const unsigned long * __restrict v2_in,
                     const unsigned long * __restrict v3_in,
                     const unsigned long * __restrict 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);
}

void __xor_altivec_5(unsigned long bytes,
                     unsigned long * __restrict v1_in,
                     const unsigned long * __restrict v2_in,
                     const unsigned long * __restrict v3_in,
                     const unsigned long * __restrict v4_in,
                     const unsigned long * __restrict 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);
}