Switch default back to not using local_mem.

#pragma OPENCL EXTENSION cl_khr_byte_addressable_store : enable
#pragma OPENCL EXTENSION cl_amd_printf : enable

typedef unsigned char uc;
typedef signed char sc;

__inline signed char vp8_filter_mask_mem(uc, uc, uchar*);
__inline signed char vp8_filter_mask(uc, uc, uchar8);

__inline char vp8_hevmask_mem(uchar, uchar*);
__inline char vp8_hevmask(uchar, uchar4);

__inline void vp8_filter_mem( signed char mask, uchar hev, uchar *base);

__inline signed char vp8_simple_filter_mask(uc, uc, uc, uc, uc);

__inline uchar8 vp8_mbfilter(signed char mask, uchar hev, uchar8);

__inline void vp8_simple_filter(signed char mask,global uc *base, int op1_off,int op0_off,int oq0_off,int oq1_off);

constant size_t threads[3] = {16, 8, 8};

#ifndef __CL_VERSION_1_0__
#define __CL_VERSION_1_0__ 100
#endif

#if !defined(__OPENCL_VERSION__) || (__OPENCL_VERSION__ == __CL_VERSION_1_0__)
#define clamp(x,y,z) vp8_char_clamp(x)
char vp8_char_clamp(int in){
    return max(min(in, 127), -128);
}
#endif

typedef struct
{
    unsigned char mblim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char blim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char lim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char hev_thr[4][SIMD_WIDTH];
    unsigned char lvl[4][4][4];
    unsigned char hev_thr_lut[2][MAX_LOOP_FILTER + 1];
    unsigned char mode_lf_lut[10];
} loop_filter_info_n __attribute__ ((aligned(SIMD_WIDTH)));

typedef struct
{
    unsigned char mblim;
    unsigned char blim;
    unsigned char lim;
    unsigned char hev_thr;
} loop_filter_info;

__inline void set_lfi(global loop_filter_info_n *lfi_n, local loop_filter_info *lfi, int frame_type, int filter_level);

__inline void vp8_filter_mem(
    signed char mask,
    uchar hev,
    uchar *base
)
{

    char *pq = (char*)base;
    pq[0] ^= 0x80;
    pq[1] ^= 0x80;
    pq[2] ^= 0x80;
    pq[3] ^= 0x80;

    char vp8_filter;
    char2 Filter;
    char4 u;

    /* add outer taps if we have high edge variance */
    vp8_filter = sub_sat(pq[0], pq[3]);
    vp8_filter &= hev;

    /* inner taps */
    vp8_filter = clamp(vp8_filter + 3 * (pq[2] - pq[1]), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3
     * if it equals 4 we'll set to adjust by -1 to account for the fact
     * we'd round 3 the other way
     */
    char2 rounding = {4,3};
    Filter = add_sat((char2)vp8_filter, rounding);
    Filter.s0 >>= 3;
    Filter.s1 >>= 3;

    /* outer tap adjustments */
    vp8_filter = Filter.s0 + 1;
    vp8_filter >>= 1;
    vp8_filter &= ~hev;

    u.s0 = add_sat(pq[0], vp8_filter);
    u.s1 = add_sat(pq[1], Filter.s1);
    u.s2 = sub_sat(pq[2], Filter.s0);
    u.s3 = sub_sat(pq[3], vp8_filter);

    pq[0] = u.s0 ^ 0x80;
    pq[1] = u.s1 ^ 0x80;
    pq[2] = u.s2 ^ 0x80;
    pq[3] = u.s3 ^ 0x80;

}

__inline uchar4 vp8_filter(
    signed char mask,
    uchar hev,
    uchar4 base
)
{
    char4 pq = as_char4(base) ^ (char4)0x80;

    char vp8_filter;
    char2 Filter;
    char4 u;

    /* add outer taps if we have high edge variance */
    vp8_filter = sub_sat(pq.s0, pq.s3);
    vp8_filter &= hev;

    /* inner taps */
    vp8_filter = clamp(vp8_filter + 3 * (pq.s2 - pq.s1), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3
     * if it equals 4 we'll set to adjust by -1 to account for the fact
     * we'd round 3 the other way
     */
    char2 rounding = {4,3};
    Filter = add_sat((char2)vp8_filter, rounding);
    Filter.s0 >>= 3;
    Filter.s1 >>= 3;

    /* outer tap adjustments */
    vp8_filter = Filter.s0 + 1;
    vp8_filter >>= 1;
    vp8_filter &= ~hev;

    u.s0 = add_sat(pq.s0, vp8_filter);
    u.s1 = add_sat(pq.s1, Filter.s1);
    u.s2 = sub_sat(pq.s2, Filter.s0);
    u.s3 = sub_sat(pq.s3, vp8_filter);

    return as_uchar4(u ^ (char4)0x80);

}

__inline uchar8 load8(global unsigned char *s_base, int s_off, int p){
    uchar8 data;
    data.s0 = s_base[s_off-4*p];
    data.s1 = s_base[s_off-3*p];
    data.s2 = s_base[s_off-2*p];
    data.s3 = s_base[s_off-p];
    data.s4 = s_base[s_off];
    data.s5 = s_base[s_off+p];
    data.s6 = s_base[s_off+2*p];
    data.s7 = s_base[s_off+3*p];
    return data;
}

__inline uchar8 load8_local(local unsigned char *s_base, int s_off, int p){
    uchar8 data;
    data.s0 = s_base[s_off-4*p];
    data.s1 = s_base[s_off-3*p];
    data.s2 = s_base[s_off-2*p];
    data.s3 = s_base[s_off-p];
    data.s4 = s_base[s_off];
    data.s5 = s_base[s_off+p];
    data.s6 = s_base[s_off+2*p];
    data.s7 = s_base[s_off+3*p];
    return data;
}

__inline void save4(global unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
}

__inline void save4_local(local unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
}

__inline void save6(global unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 3*p] = data.s1;
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p  ] = data.s6;
}

__inline void save6_local(local unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 3*p] = data.s1;
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p  ] = data.s6;
}

__inline uchar16 load16(global unsigned char *s_base, int s_off, int p){
    uchar16 data;
    data.s01234567 = load8(s_base, s_off, p);
    data.s89abcdef = load8(s_base, s_off+8*p, p);
    return data;
}

__inline void save12(global unsigned char *s_base, int s_off, int p, uchar16 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p] = data.s6;
    s_base[s_off + 3*p] = data.s7;
    s_base[s_off + 4*p] = data.s8;
    s_base[s_off + 5*p] = data.s9;
    s_base[s_off + 6*p] = data.sa;
    s_base[s_off + 7*p] = data.sb;
    s_base[s_off + 8*p] = data.sc;
    s_base[s_off + 9*p] = data.sd;
}

// Filters horizontal edges of inner blocks in a Macroblock
__inline void vp8_loop_filter_horizontal_edge_worker(
    global uchar *s_base,
    int source_offset,
    global int *pitches, /* pitch */
    local loop_filter_info *lfi,
    global int *filters,
    int dc_diffs,
    int filter_level,
    int cur_iter,
    size_t num_blocks,
    size_t num_planes,
    size_t thread,
    size_t plane,
    size_t block,
    int p //pitches[plane]
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter*p; //Move down 4 lines per iter
        s_off += thread; //Move to the right part of the horizontal line

        data = load8(s_base, s_off, p);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);

        save4(s_base, s_off, p, data);
    }
}

// Filters horizontal edges of inner blocks in a Macroblock
__inline void vp8_loop_filter_horizontal_edge_worker_local(
    local uchar *s_base,
    local loop_filter_info *lfi,
    int dc_diffs,
    int cur_iter,
    size_t thread,
    int p //pitches[plane]
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = cur_iter*p + thread; //Move down 4 lines per iter
        //Move to the right part of the horizontal line

        data = load8_local(s_base, s_off, p);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);

        save4_local(s_base, s_off, p, data);
    }
}

__inline void vp8_loop_filter_vertical_edge_worker(
    global uchar *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    int dc_diffs,
    int cur_iter,
    size_t thread,
    int p
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter; //Move right 4 cols per iter
        s_off += thread * p; //Move down to the right part of the vertical line

        data = load8(s_base, s_off, 1);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);
        save4(s_base, s_off, 1, data);
    }
}

__inline void vp8_loop_filter_vertical_edge_worker_local(
    local uchar *s_base,
    local loop_filter_info *lfi,
    int dc_diffs,
    int cur_iter,
    size_t thread,
    int p
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = cur_iter + thread * p; //Move right 4 cols per iter
        //Move down to the right part of the vertical line

        data = load8_local(s_base, s_off, 1);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);
        save4_local(s_base, s_off, 1, data);
    }
}

__inline void vp8_mbloop_filter_horizontal_edge_worker(
    global unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    int s_off = source_offset + thread;

    uchar8 data = load8(s_base, s_off, p);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6(s_base, s_off, p, data);

}

__inline void vp8_mbloop_filter_horizontal_edge_worker_local(
    local unsigned char *source,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    uchar8 data = load8_local(source, thread, p);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6_local(source, thread, p, data);

}

__inline void vp8_mbloop_filter_vertical_edge_worker(
    global unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    int s_off = source_offset + p*thread;

    uchar8 data = load8(s_base, s_off, 1);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6(s_base, s_off, 1, data);
}

__inline void vp8_mbloop_filter_vertical_edge_worker_local(
    local unsigned char *source,
    local loop_filter_info *lfi,
    size_t thread,
    int p //threads[plane]+4
){

    int s_off = p*thread;

    uchar8 data = load8_local(source, s_off, 1);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6_local(source, s_off, 1, data);
}

//Assumes a work group size of 1 plane
__inline void load_mb(int size, local uchar *dst, global uchar *src, int src_off, int src_pitch, int mb_row, int mb_col, int dc_diffs, int thread){
    //Load 4 row top border if row != 0, starting at row 0, col 4
    int dst_pitch = size + 4;
    int row_start, row_end, col_start, col_end;

    if (dc_diffs > 0){
        row_end = 0;
        col_end = size;
    } else {
        row_end = 4;
        col_end = 4;
    }

    row_start = -4;

    //Load 4 col left border if col != 0, otherwise just the pixels of block data
    if (mb_col > 0){
        col_start = -4;
    } else {
        col_start = 0;
    }

    if (mb_row > 0){
        for (int i = row_start; i < row_end; i++){
                dst[i*dst_pitch + thread] = src[i*src_pitch + src_off + thread];
        }
    }

    //Load 16x16 or 8x8 pixels of Macroblock data with destination starting at
    //row 4, col 4.
    for (int i = col_start; i < col_end; i++){
        dst[thread*dst_pitch + i] = src[thread*src_pitch + src_off + i];
    }
}

__inline void save_mb(int size, local uchar *src, global uchar *dst, int dst_off, int dst_pitch, int mb_row, int mb_col, int dc_diffs, int thread){
    //Load 4 row top border if row != 0, starting at row 0, col 4
    int src_pitch = size + 4;
    int row_start, row_end, col_start, col_end;

    if (dc_diffs > 0){
        row_end = 0;
        col_end = size;
    } else {
        row_end = 3;
        col_end = 3;
    }

    row_start = -3;

    //Save 3 col left border if col != 0, otherwise just the pixels of block data
    if (mb_col > 0){
        col_start = -3;
    } else {
        col_start = 0;
    }

    if (mb_row > 0){
        for (int i = row_start; i < row_end; i++){
            dst[i*dst_pitch + dst_off + thread] = src[i*src_pitch + thread];
        }
    }

    //Save 16x16 or 8x8 pixels of Macroblock data with destination starting at
    //row 4, col 4.
    for (int i = col_start; i < col_end; i++){
        dst[thread*dst_pitch + dst_off + i] = src[thread*src_pitch + i];
    }
}

kernel void vp8_loop_filter_all_edges_kernel(
    global unsigned char *s_base,
    global int *offsets_in,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){

    size_t block = get_global_id(2);

    int block_offset = block_offsets[priority_level];
    global int *filters = &filters_in[4*block_offset];
    int filter_level = filters[block];
    if ( filter_level <= 0 )
        return;

    size_t thread = get_global_id(0);
    size_t plane = 0;

    //Threads 0-15 are Y plane, 16-23 are U, 24-31 are V.
#if 0
    if (thread > 15){
        plane += thread / 8 - 1;
        thread = thread % 8;
    }
#else
    int new_thread = thread;
    plane = thread / 16;
    new_thread = new_thread - plane * (thread/8 * 8); //If plane==1, new thread = thread%8... without branching
    plane += plane * (thread / 8 - 2); //plane = 0/1/2 for Y/U/V
    thread = new_thread;
#endif

    global int *offsets = &offsets_in[3*block_offset];
    size_t num_blocks = priority_num_blocks[priority_level];
    local loop_filter_info lf_info;
    if (get_local_id(0) == 0){ //shared among all local threads, save bandwidth
        set_lfi(lfi_n, &lf_info, frame_type, filter_level);
    }

    int source_offset = offsets[block*3 + plane];

    int p = pitches[plane];

    int mb_col = filters[num_blocks * COLS_LOCATION + block];
    int mb_row = filters[num_blocks * ROWS_LOCATION + block];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

#define USE_LOCAL_MEM_FILTER 0
#if USE_LOCAL_MEM_FILTER
    //At the moment this local memory mechanism only works if local number of
    //threads/plane == global number of threads/plane.
    //This is forced in loop_filter_filters.c

    local uchar mb_data[1200]; //Local copy of frame data for current plane
    int mb_offset, mb_pitch;

    int num_threads = threads[plane];
    mb_pitch = num_threads+4;
    mb_offset = 4+4*mb_pitch + 400*plane;
    mb_data = &mb_data[mb_offset];

    load_mb(num_threads, mb_data, s_base, source_offset, p, mb_row, mb_col, dc_diffs, thread);
    //write_mem_fence(CLK_LOCAL_MEM_FENCE);

    if ( mb_col > 0 ){
        vp8_mbloop_filter_vertical_edge_worker_local(mb_data, &lf_info, thread, mb_pitch);
    }

    //YUV planes, then 2 more passes of Y plane
    vp8_loop_filter_vertical_edge_worker_local(mb_data, &lf_info,
            dc_diffs, 4, thread, mb_pitch);
    if (plane == 0){
        vp8_loop_filter_vertical_edge_worker_local(mb_data, &lf_info,
                dc_diffs, 8, thread, mb_pitch);
        vp8_loop_filter_vertical_edge_worker_local(mb_data, &lf_info,
                dc_diffs, 12, thread, mb_pitch);
    }

    if (mb_row > 0){
        vp8_mbloop_filter_horizontal_edge_worker_local(mb_data, &lf_info, thread, mb_pitch);
    }
    //YUV planes, then 2 more passes of Y plane
    vp8_loop_filter_horizontal_edge_worker_local(mb_data, &lf_info, dc_diffs, 4, thread, mb_pitch);
    if (plane == 0){
        vp8_loop_filter_horizontal_edge_worker_local(mb_data, &lf_info, dc_diffs, 8, thread, mb_pitch);
        vp8_loop_filter_horizontal_edge_worker_local(mb_data, &lf_info, dc_diffs, 12, thread, mb_pitch);
    }
    save_mb(num_threads, mb_data, s_base, source_offset, p, mb_row, mb_col, dc_diffs, thread);

#else
    //Load/stores directly out of global memory.
    if ( mb_col > 0 ){
        vp8_mbloop_filter_vertical_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }
    //YUV planes, then 2 more passes of Y plane
    vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
            dc_diffs, 1, thread, p);
    if (plane == 0){
        vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                dc_diffs, 2, thread, p);
        vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                dc_diffs, 3, thread, p);
    }
    write_mem_fence(CLK_GLOBAL_MEM_FENCE);

    if (mb_row > 0){
        vp8_mbloop_filter_horizontal_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }
    //YUV planes, then 2 more passes of Y plane
    vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
            dc_diffs, filter_level, 1, num_blocks, 3, thread, plane, block, p);
    if (plane == 0){
        vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 2, num_blocks, 1, thread, plane, block, p);
        vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 3, num_blocks, 1, thread, plane, block, p);
    }
#endif
}

kernel void vp8_loop_filter_horizontal_edges_kernel(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches, /* pitch */
    global loop_filter_info_n *lfi_n,
    global int *filters,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){
    size_t thread = get_global_id(0);
    size_t plane = get_global_id(1);
    size_t block = get_global_id(2);
    size_t num_blocks = get_global_size(2);

    int block_offset = block_offsets[priority_level];
    filters = &filters[4*block_offset];
    offsets = &offsets[3*block_offset];
    int filter_level = filters[block];
    int p = pitches[plane];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

    int source_offset = offsets[block*3 + plane];

    local loop_filter_info lf_info;
    set_lfi(lfi_n, &lf_info, frame_type, filter_level);

    int thread_level_filter = (thread<threads[plane]) & (filter_level!=0);
    int do_filter = filters[num_blocks*ROWS_LOCATION + block] > 0;
    do_filter &= thread_level_filter;
    if (do_filter){
        vp8_mbloop_filter_horizontal_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }

    //YUV planes, then 2 more passes of Y plane
    if (thread_level_filter){
        vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 1, num_blocks, 3, thread, plane, block, p);
        if (plane == 0){
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 2, num_blocks, 1, thread, plane, block, p);
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 3, num_blocks, 1, thread, plane, block, p);
        }
    }
}

kernel void vp8_loop_filter_vertical_edges_kernel(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){
    size_t thread = get_global_id(0);
    size_t plane = get_global_id(1);
    size_t block = get_global_id(2);
    size_t num_blocks = get_global_size(2);

    int block_offset = block_offsets[priority_level];

    filters = &filters[4*block_offset];
    offsets = &offsets[3*block_offset];
    int filter_level = filters[block];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

    int source_offset = offsets[block*3 + plane];

    local loop_filter_info lf_info;
    set_lfi(lfi_n, &lf_info, frame_type, filter_level);

    int p = pitches[plane];

    int thread_level_filter = (thread<threads[plane]) & (filter_level!=0);
    int do_filter = filters[num_blocks*COLS_LOCATION + block] > 0;
    do_filter &= thread_level_filter;
    if (do_filter){
        vp8_mbloop_filter_vertical_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }

    //YUV planes, then 2 more passes of Y plane
    if (thread_level_filter){
        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                dc_diffs, 1, thread, p);
        if (plane == 0){
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 2, thread, p);
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 3, thread, p);
        }
    }

}

void vp8_loop_filter_simple_horizontal_edge_worker
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    local loop_filter_info *lfi,
    global int *filters_in,
    int use_mbflim,
    int filter_type,
    int cur_iter,
    int priority_level,
    global int *block_offsets,
    global int *priority_num_blocks
){
    int filter_offset = 4*block_offsets[priority_level];
    private size_t block = get_global_id(2);
    size_t num_blocks = priority_num_blocks[priority_level];

    global int *filters = &filters_in[filter_offset];

    if (filters[num_blocks*filter_type + block] > 0){
        int filter_level = filters[block];
        if (filter_level){
            size_t i = get_global_id(0);
            int p = pitches[0];

            int s_off = cur_iter*4*p;
            s_off += i;

            signed char mask = 0;

            if (i < threads[0]){
                uchar flimit;
                if (use_mbflim == 0){
                    flimit = lfi->blim;
                } else {
                    flimit = lfi->mblim;
                }

                mask = vp8_simple_filter_mask(flimit, s_base[s_off-2*p], s_base[s_off-p], s_base[s_off], s_base[s_off+p]);
                vp8_simple_filter(mask, s_base, s_off - 2 * p, s_off - 1 * p, s_off, s_off + 1 * p);
            }
        }
    }
}

void vp8_loop_filter_simple_vertical_edge_worker(
    global unsigned char *s_base,
    global int *offsets, /* Y or YUV offsets for EACH block being processed*/
    global int *pitches, /* 1 or 3 values for Y or YUV pitches*/
    local loop_filter_info *lfi, /* Single struct for the frame */
    global int *filters_in, /* Filters for each block being processed */
    int use_mbflim, /* Use lfi->flim or lfi->mbflim, need once per kernel call */
    int filter_type, /* Should dc_diffs, rows, or cols be used?*/
    int cur_iter,
    int priority_level,
    global int *block_offsets,
    global int *priority_num_blocks
){
    int filter_offset = 4*block_offsets[priority_level];
    private size_t block = get_global_id(2);
    size_t num_blocks = priority_num_blocks[priority_level];

    global int *filters = &filters_in[filter_offset];

    if (filters[filter_type * num_blocks + block] > 0){
        int filter_level = filters[block];
        if (filter_level){
            size_t i = get_global_id(0);
            int p = pitches[0];

            int s_off = cur_iter*4;
            s_off += p * i;

            signed char mask = 0;

            if (i < threads[0]){
                uchar flimit;
                if (use_mbflim == 0){
                    flimit = lfi->blim;
                } else {
                    flimit = lfi->mblim;
                }

                mask = vp8_simple_filter_mask(flimit, s_base[s_off-2], s_base[s_off-1], s_base[s_off], s_base[s_off+1]);
                vp8_simple_filter(mask, s_base, s_off - 2, s_off - 1, s_off, s_off + 1);
            }
        }
    }
}

kernel void vp8_loop_filter_simple_vertical_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets, /* Y or YUV offsets for EACH block being processed*/
    global int *pitches, /* 1 or 3 values for Y or YUV pitches*/
    global loop_filter_info_n *lfi_n, /* Single struct for the frame */
    global int *filters_in, /* Filters for each block being processed */
    int filter_type, /* Should dc_diffs, rows, or cols be used?*/
    int priority_level,
    int num_levels,
    global int *block_offsets, //Number of previously processed blocks per level
    global int *priority_num_blocks,
    int frame_type
){

    local loop_filter_info lfi;
    int block = get_global_id(2);
    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset + block];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 1, COLS_LOCATION, 0, priority_level,
            block_offsets, priority_num_blocks
    );

    //3 Y plane iterations
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
            block_offsets, priority_num_blocks
    );
}

kernel void vp8_loop_filter_simple_horizontal_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){

    local loop_filter_info lfi;
    int block = get_global_id(2);
    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 1, ROWS_LOCATION, 0, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
            block_offsets, priority_num_blocks
    );
}

kernel void vp8_loop_filter_simple_all_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
)
{

    int block = (int)get_global_id(2);
    local loop_filter_info lfi;

    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset + block];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    if (block < priority_num_blocks[priority_level]){
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 1, COLS_LOCATION, 0, priority_level,
                block_offsets, priority_num_blocks
        );

        //3 Y plane iterations
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
                block_offsets, priority_num_blocks
        );
    }

    barrier(CLK_GLOBAL_MEM_FENCE);

    if (block < priority_num_blocks[priority_level]){
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 1, ROWS_LOCATION, 0, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
                block_offsets, priority_num_blocks
        );
    }
}

//Inline and non-kernel functions follow.
__inline void vp8_mbfilter_mem(
    signed char mask,
    uchar hev,
    uchar *base
)
{
    char4 u;

    char *pq = (char*)base;
    pq[0] ^= 0x80;
    pq[1] ^= 0x80;
    pq[2] ^= 0x80;
    pq[3] ^= 0x80;
    pq[4] ^= 0x80;
    pq[5] ^= 0x80;

    /* add outer taps if we have high edge variance */
    char vp8_filter = sub_sat(pq[2], pq[5]);
    vp8_filter = clamp(vp8_filter + 3 * (pq[4] - pq[3]), -128, 127);
    vp8_filter &= mask;

    char2 filter = (char2)vp8_filter;
    filter &= (char2)hev;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat(filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    pq[4] = sub_sat(pq[4], filter.s0);
    pq[3] = add_sat(pq[3], filter.s1);

    /* only apply wider filter if not high edge variance */
    filter.s1 = vp8_filter & ~hev;

    /* roughly 3/7th, 2/7th, and 1/7th difference across boundary */
    u.s0 = clamp((63 + filter.s1 * 27) >> 7, -128, 127);
    u.s1 = clamp((63 + filter.s1 * 18) >> 7, -128, 127);
    u.s2 = clamp((63 + filter.s1 * 9) >> 7, -128, 127);
    u.s3 = 0;

    char4 s;
    s = sub_sat(vload4(0, &pq[4]), u);
    pq[4] = s.s0 ^ 0x80;
    pq[5] = s.s1 ^ 0x80;
    pq[6] = s.s2 ^ 0x80;
    pq[7] = s.s3;

    s = add_sat(vload4(0, pq), u.s3210);
    pq[0] = s.s0;
    pq[1] = s.s1 ^ 0x80;
    pq[2] = s.s2 ^ 0x80;
    pq[3] = s.s3 ^ 0x80;
}

__inline uchar8 vp8_mbfilter(
    signed char mask,
    uchar hev,
    uchar8 base
)
{
    char4 u;

    char8 pq = as_char8(base);
    pq ^= (char8){0, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0};

    /* add outer taps if we have high edge variance */
    char vp8_filter = sub_sat(pq.s2, pq.s5);
    vp8_filter = clamp(vp8_filter + 3 * (pq.s4 - pq.s3), -128, 127);
    vp8_filter &= mask;

    char2 filter = (char2)vp8_filter;
    filter &= (char2)hev;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat(filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    pq.s4 = sub_sat(pq.s4, filter.s0);
    pq.s3 = add_sat(pq.s3, filter.s1);

    /* only apply wider filter if not high edge variance */
    filter.s1 = vp8_filter & ~hev;

    /* roughly 3/7th, 2/7th, and 1/7th difference across boundary */
    u.s0 = clamp((63 + filter.s1 * 27) >> 7, -128, 127);
    u.s1 = clamp((63 + filter.s1 * 18) >> 7, -128, 127);
    u.s2 = clamp((63 + filter.s1 * 9) >> 7, -128, 127);
    u.s3 = 0;

    char4 s;
    s = sub_sat(pq.s4567, u);
    pq.s4567 = s ^ (char4){0x80, 0x80, 0x80, 0};
    s = add_sat(pq.s0123, u.s3210);
    pq.s0123 = s ^ (char4){0, 0x80, 0x80, 0x80};

    return as_uchar8(pq);
}

__inline char vp8_hevmask_mem(uchar thresh, uchar *pq){
#if 0
    signed char hev = 0;
    hev  |= (abs(pq[0] - pq[1]) > thresh) * -1;
    hev  |= (abs(pq[3] - pq[2]) > thresh) * -1;
    return hev;
#else
    uchar mask = abs_diff(pq[0], pq[1]) > thresh;
    mask |= abs_diff(pq[3], pq[2]) > thresh;
    return ~mask + 1;
#endif
}

/* is there high variance internal edge ( 11111111 yes, 00000000 no) */
__inline char vp8_hevmask(uchar thresh, uchar4 pq)
{
    return ~any(abs_diff(pq.s03, pq.s12) > (uchar2)thresh) + 1;
}

__inline signed char vp8_filter_mask_mem(uc limit, uc blimit, uchar *pq)
{
    //Only apply the filter if the difference is LESS than 'limit'
    char mask = (abs_diff(pq[0], pq[1]) > limit);
    mask |= (abs_diff(pq[1], pq[2]) > limit);
    mask |= (abs_diff(pq[2], pq[3]) > limit);
    mask |= (abs_diff(pq[5], pq[4]) > limit);
    mask |= (abs_diff(pq[6], pq[5]) > limit);
    mask |= (abs_diff(pq[7], pq[6]) > limit);
    mask |= (abs_diff(pq[3], pq[4]) * 2 + abs_diff(pq[2], pq[5]) / 2  > blimit);
    return mask - 1;
}

/* should we apply any filter at all ( 11111111 yes, 00000000 no) */
__inline signed char vp8_filter_mask(uc limit, uc blimit, uchar8 pq)
{
#if 1
   //Only apply the filter if the difference is LESS than 'limit'
    signed char mask = (abs_diff(pq.s0, pq.s1) > limit);
    mask |= (abs_diff(pq.s1, pq.s2) > limit);
    mask |= (abs_diff(pq.s2, pq.s3) > limit);
    mask |= (abs_diff(pq.s5, pq.s4) > limit);
    mask |= (abs_diff(pq.s6, pq.s5) > limit);
    mask |= (abs_diff(pq.s7, pq.s6) > limit);
    mask |= (abs_diff(pq.s3, pq.s4) * 2 + abs_diff(pq.s2, pq.s5) / 2  > blimit);
    return mask - 1;
#else
	char8 mask8 = abs_diff(pq.s01256700, pq.s12345600) > limit;
	mask8 |= (char8)(abs_diff(pq.s3, pq.s4) * 2 + abs_diff(pq.s2, pq.s5) / 2 > blimit);
	mask8--;
	return any(mask8) ? -1 : 0;
#endif
}

/* should we apply any filter at all ( 11111111 yes, 00000000 no) */
__inline signed char vp8_simple_filter_mask(uc blimit, uc p1, uc p0, uc q0, uc q1)
{
    signed char mask = (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  <= blimit) * -1;
    return mask;
}

__inline void vp8_simple_filter(
    signed char mask,
    global uc *base,
    int op1_off,
    int op0_off,
    int oq0_off,
    int oq1_off
)
{

    global uc *op1 = base + op1_off;
    global uc *op0 = base + op0_off;
    global uc *oq0 = base + oq0_off;
    global uc *oq1 = base + oq1_off;

    signed char vp8_filter;
    char2 filter;

    char4 pq = (char4){*op1, *op0, *oq0, *oq1};
    pq ^= (char4)0x80;

    signed char u;

    vp8_filter = sub_sat(pq.s0, pq.s3);
    vp8_filter = clamp(vp8_filter + 3 * (pq.s2 - pq.s1), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat((char2)vp8_filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    u = sub_sat(pq.s2, filter.s0);
    *oq0  = u ^ 0x80;

    u = add_sat(pq.s1, filter.s1);
    *op0 = u ^ 0x80;
}

__inline void set_lfi(global loop_filter_info_n *lfi_n, local loop_filter_info *lfi, int frame_type, int filter_level){
    if (get_local_id(0) == 0 && get_local_id(1)==0 && get_local_id(2)==0){
        int hev_index = lfi_n->hev_thr_lut[frame_type][filter_level];
        lfi->mblim = lfi_n->mblim[filter_level][0];
        lfi->blim = lfi_n->blim[filter_level][0];
        lfi->lim = lfi_n->lim[filter_level][0];
        lfi->hev_thr = lfi_n->hev_thr[hev_index][0];
    }
}

#pragma OPENCL EXTENSION cl_khr_byte_addressable_store : enable
#pragma OPENCL EXTENSION cl_amd_printf : enable

typedef unsigned char uc;
typedef signed char sc;

__inline signed char vp8_filter_mask_mem(uc, uc, uchar*);
__inline signed char vp8_filter_mask(uc, uc, uchar8);

__inline char vp8_hevmask_mem(uchar, uchar*);
__inline char vp8_hevmask(uchar, uchar4);

__inline void vp8_filter_mem( signed char mask, uchar hev, uchar *base);

__inline signed char vp8_simple_filter_mask(uc, uc, uc, uc, uc);

__inline uchar8 vp8_mbfilter(signed char mask, uchar hev, uchar8);

__inline void vp8_simple_filter(signed char mask,global uc *base, int op1_off,int op0_off,int oq0_off,int oq1_off);

constant size_t threads[3] = {16, 8, 8};

#ifndef __CL_VERSION_1_0__
#define __CL_VERSION_1_0__ 100
#endif

#if !defined(__OPENCL_VERSION__) || (__OPENCL_VERSION__ == __CL_VERSION_1_0__)
#define clamp(x,y,z) vp8_char_clamp(x)
char vp8_char_clamp(int in){
    return max(min(in, 127), -128);
}
#endif

typedef struct
{
    unsigned char mblim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char blim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char lim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char hev_thr[4][SIMD_WIDTH];
    unsigned char lvl[4][4][4];
    unsigned char hev_thr_lut[2][MAX_LOOP_FILTER + 1];
    unsigned char mode_lf_lut[10];
} loop_filter_info_n __attribute__ ((aligned(SIMD_WIDTH)));

typedef struct
{
    unsigned char mblim;
    unsigned char blim;
    unsigned char lim;
    unsigned char hev_thr;
} loop_filter_info;

__inline void set_lfi(global loop_filter_info_n *lfi_n, local loop_filter_info *lfi, int frame_type, int filter_level);

__inline void vp8_filter_mem(
    signed char mask,
    uchar hev,
    uchar *base
)
{

    char *pq = (char*)base;
    pq[0] ^= 0x80;
    pq[1] ^= 0x80;
    pq[2] ^= 0x80;
    pq[3] ^= 0x80;

    char vp8_filter;
    char2 Filter;
    char4 u;

    /* add outer taps if we have high edge variance */
    vp8_filter = sub_sat(pq[0], pq[3]);
    vp8_filter &= hev;

    /* inner taps */
    vp8_filter = clamp(vp8_filter + 3 * (pq[2] - pq[1]), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3
     * if it equals 4 we'll set to adjust by -1 to account for the fact
     * we'd round 3 the other way
     */
    char2 rounding = {4,3};
    Filter = add_sat((char2)vp8_filter, rounding);
    Filter.s0 >>= 3;
    Filter.s1 >>= 3;

    /* outer tap adjustments */
    vp8_filter = Filter.s0 + 1;
    vp8_filter >>= 1;
    vp8_filter &= ~hev;

    u.s0 = add_sat(pq[0], vp8_filter);
    u.s1 = add_sat(pq[1], Filter.s1);
    u.s2 = sub_sat(pq[2], Filter.s0);
    u.s3 = sub_sat(pq[3], vp8_filter);

    pq[0] = u.s0 ^ 0x80;
    pq[1] = u.s1 ^ 0x80;
    pq[2] = u.s2 ^ 0x80;
    pq[3] = u.s3 ^ 0x80;

}

__inline uchar4 vp8_filter(
    signed char mask,
    uchar hev,
    uchar4 base
)
{
    char4 pq = as_char4(base) ^ (char4)0x80;

    char vp8_filter;
    char2 Filter;
    char4 u;

    /* add outer taps if we have high edge variance */
    vp8_filter = sub_sat(pq.s0, pq.s3);
    vp8_filter &= hev;

    /* inner taps */
    vp8_filter = clamp(vp8_filter + 3 * (pq.s2 - pq.s1), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3
     * if it equals 4 we'll set to adjust by -1 to account for the fact
     * we'd round 3 the other way
     */
    char2 rounding = {4,3};
    Filter = add_sat((char2)vp8_filter, rounding);
    Filter.s0 >>= 3;
    Filter.s1 >>= 3;

    /* outer tap adjustments */
    vp8_filter = Filter.s0 + 1;
    vp8_filter >>= 1;
    vp8_filter &= ~hev;

    u.s0 = add_sat(pq.s0, vp8_filter);
    u.s1 = add_sat(pq.s1, Filter.s1);
    u.s2 = sub_sat(pq.s2, Filter.s0);
    u.s3 = sub_sat(pq.s3, vp8_filter);

    return as_uchar4(u ^ (char4)0x80);

}

__inline uchar8 load8(global unsigned char *s_base, int s_off, int p){
    uchar8 data;
    data.s0 = s_base[s_off-4*p];
    data.s1 = s_base[s_off-3*p];
    data.s2 = s_base[s_off-2*p];
    data.s3 = s_base[s_off-p];
    data.s4 = s_base[s_off];
    data.s5 = s_base[s_off+p];
    data.s6 = s_base[s_off+2*p];
    data.s7 = s_base[s_off+3*p];
    return data;
}

__inline uchar8 load8_local(local unsigned char *s_base, int s_off, int p){
    uchar8 data;
    data.s0 = s_base[s_off-4*p];
    data.s1 = s_base[s_off-3*p];
    data.s2 = s_base[s_off-2*p];
    data.s3 = s_base[s_off-p];
    data.s4 = s_base[s_off];
    data.s5 = s_base[s_off+p];
    data.s6 = s_base[s_off+2*p];
    data.s7 = s_base[s_off+3*p];
    return data;
}

__inline void save4(global unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
}

__inline void save4_local(local unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
}

__inline void save6(global unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 3*p] = data.s1;
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p  ] = data.s6;
}

__inline void save6_local(local unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 3*p] = data.s1;
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p  ] = data.s6;
}

__inline uchar16 load16(global unsigned char *s_base, int s_off, int p){
    uchar16 data;
    data.s01234567 = load8(s_base, s_off, p);
    data.s89abcdef = load8(s_base, s_off+8*p, p);
    return data;
}

__inline void save12(global unsigned char *s_base, int s_off, int p, uchar16 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p] = data.s6;
    s_base[s_off + 3*p] = data.s7;
    s_base[s_off + 4*p] = data.s8;
    s_base[s_off + 5*p] = data.s9;
    s_base[s_off + 6*p] = data.sa;
    s_base[s_off + 7*p] = data.sb;
    s_base[s_off + 8*p] = data.sc;
    s_base[s_off + 9*p] = data.sd;
}

// Filters horizontal edges of inner blocks in a Macroblock
__inline void vp8_loop_filter_horizontal_edge_worker(
    global uchar *s_base,
    int source_offset,
    global int *pitches, /* pitch */
    local loop_filter_info *lfi,
    global int *filters,
    int dc_diffs,
    int filter_level,
    int cur_iter,
    size_t num_blocks,
    size_t num_planes,
    size_t thread,
    size_t plane,
    size_t block,
    int p //pitches[plane]
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter*p; //Move down 4 lines per iter
        s_off += thread; //Move to the right part of the horizontal line

        data = load8(s_base, s_off, p);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);

        save4(s_base, s_off, p, data);
    }
}

// Filters horizontal edges of inner blocks in a Macroblock
__inline void vp8_loop_filter_horizontal_edge_worker_local(
    local uchar *s_base,
    local loop_filter_info *lfi,
    int dc_diffs,
    int cur_iter,
    size_t thread,
    int p //pitches[plane]
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = cur_iter*p + thread; //Move down 4 lines per iter
        //Move to the right part of the horizontal line

        data = load8_local(s_base, s_off, p);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);

        save4_local(s_base, s_off, p, data);
    }
}

__inline void vp8_loop_filter_vertical_edge_worker(
    global uchar *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    int dc_diffs,
    int cur_iter,
    size_t thread,
    int p
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter; //Move right 4 cols per iter
        s_off += thread * p; //Move down to the right part of the vertical line

        data = load8(s_base, s_off, 1);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);
        save4(s_base, s_off, 1, data);
    }
}

__inline void vp8_loop_filter_vertical_edge_worker_local(
    local uchar *s_base,
    local loop_filter_info *lfi,
    int dc_diffs,
    int cur_iter,
    size_t thread,
    int p
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = cur_iter + thread * p; //Move right 4 cols per iter
        //Move down to the right part of the vertical line

        data = load8_local(s_base, s_off, 1);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);
        save4_local(s_base, s_off, 1, data);
    }
}

__inline void vp8_mbloop_filter_horizontal_edge_worker(
    global unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    int s_off = source_offset + thread;

    uchar8 data = load8(s_base, s_off, p);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6(s_base, s_off, p, data);

}

__inline void vp8_mbloop_filter_horizontal_edge_worker_local(
    local unsigned char *source,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    uchar8 data = load8_local(source, thread, p);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6_local(source, thread, p, data);

}

__inline void vp8_mbloop_filter_vertical_edge_worker(
    global unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    int s_off = source_offset + p*thread;

    uchar8 data = load8(s_base, s_off, 1);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6(s_base, s_off, 1, data);
}

__inline void vp8_mbloop_filter_vertical_edge_worker_local(
    local unsigned char *source,
    local loop_filter_info *lfi,
    size_t thread,
    int p //threads[plane]+4
){

    int s_off = p*thread;

    uchar8 data = load8_local(source, s_off, 1);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6_local(source, s_off, 1, data);
}

//Assumes a work group size of 1 plane
__inline void load_mb(int size, local uchar *dst, global uchar *src, int src_off, int src_pitch, int mb_row, int mb_col, int dc_diffs, int thread){
    //Load 4 row top border if row != 0, starting at row 0, col 4
    int dst_pitch = size + 4;
    int row_start, row_end, col_start, col_end;

    if (dc_diffs > 0){
        row_end = 0;
        col_end = size;
    } else {
        row_end = 4;
        col_end = 4;
    }

    row_start = -4;

    //Load 4 col left border if col != 0, otherwise just the pixels of block data
    if (mb_col > 0){
        col_start = -4;
    } else {
        col_start = 0;
    }

    if (mb_row > 0){
        for (int i = row_start; i < row_end; i++){
                dst[i*dst_pitch + thread] = src[i*src_pitch + src_off + thread];
        }
    }

    //Load 16x16 or 8x8 pixels of Macroblock data with destination starting at
    //row 4, col 4.
    for (int i = col_start; i < col_end; i++){
        dst[thread*dst_pitch + i] = src[thread*src_pitch + src_off + i];
    }
}

__inline void save_mb(int size, local uchar *src, global uchar *dst, int dst_off, int dst_pitch, int mb_row, int mb_col, int dc_diffs, int thread){
    //Load 4 row top border if row != 0, starting at row 0, col 4
    int src_pitch = size + 4;
    int row_start, row_end, col_start, col_end;

    if (dc_diffs > 0){
        row_end = 0;
        col_end = size;
    } else {
        row_end = 3;
        col_end = 3;
    }

    row_start = -3;

    //Save 3 col left border if col != 0, otherwise just the pixels of block data
    if (mb_col > 0){
        col_start = -3;
    } else {
        col_start = 0;
    }

    if (mb_row > 0){
        for (int i = row_start; i < row_end; i++){
            dst[i*dst_pitch + dst_off + thread] = src[i*src_pitch + thread];
        }
    }

    //Save 16x16 or 8x8 pixels of Macroblock data with destination starting at
    //row 4, col 4.
    for (int i = col_start; i < col_end; i++){
        dst[thread*dst_pitch + dst_off + i] = src[thread*src_pitch + i];
    }
}

kernel void vp8_loop_filter_all_edges_kernel(
    global unsigned char *s_base,
    global int *offsets_in,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){

    size_t block = get_global_id(2);

    int block_offset = block_offsets[priority_level];
    global int *filters = &filters_in[4*block_offset];
    int filter_level = filters[block];
    if ( filter_level <= 0 )
        return;

    size_t thread = get_global_id(0);
    size_t plane = 0;

    //Threads 0-15 are Y plane, 16-23 are U, 24-31 are V.
#if 0
    if (thread > 15){
        plane += thread / 8 - 1;
        thread = thread % 8;
    }
#else
    int new_thread = thread;
    plane = thread / 16;
    new_thread = new_thread - plane * (thread/8 * 8); //If plane==1, new thread = thread%8... without branching
    plane += plane * (thread / 8 - 2); //plane = 0/1/2 for Y/U/V
    thread = new_thread;
#endif

    global int *offsets = &offsets_in[3*block_offset];
    size_t num_blocks = priority_num_blocks[priority_level];
    local loop_filter_info lf_info;
    if (get_local_id(0) == 0){ //shared among all local threads, save bandwidth
        set_lfi(lfi_n, &lf_info, frame_type, filter_level);
    }

    int source_offset = offsets[block*3 + plane];

    int p = pitches[plane];

    int mb_col = filters[num_blocks * COLS_LOCATION + block];
    int mb_row = filters[num_blocks * ROWS_LOCATION + block];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

#define USE_LOCAL_MEM_FILTER 1
#if USE_LOCAL_MEM_FILTER
    //At the moment this local memory mechanism only works if local number of
    //threads/plane == global number of threads/plane.
    //This is forced in loop_filter_filters.c

    local uchar mb_data[1200]; //Local copy of frame data for current plane
    int mb_offset, mb_pitch;

    int num_threads = threads[plane];
    mb_pitch = num_threads+4;
    mb_offset = 4+4*mb_pitch + 400*plane;
    mb_data = &mb_data[mb_offset];

    load_mb(num_threads, mb_data, s_base, source_offset, p, mb_row, mb_col, dc_diffs, thread);
    //write_mem_fence(CLK_LOCAL_MEM_FENCE);

    if ( mb_col > 0 ){
        vp8_mbloop_filter_vertical_edge_worker_local(mb_data, &lf_info, thread, mb_pitch);
    }

    //YUV planes, then 2 more passes of Y plane
    vp8_loop_filter_vertical_edge_worker_local(mb_data, &lf_info,
            dc_diffs, 4, thread, mb_pitch);
    if (plane == 0){
        vp8_loop_filter_vertical_edge_worker_local(mb_data, &lf_info,
                dc_diffs, 8, thread, mb_pitch);
        vp8_loop_filter_vertical_edge_worker_local(mb_data, &lf_info,
                dc_diffs, 12, thread, mb_pitch);
    }

    if (mb_row > 0){
        vp8_mbloop_filter_horizontal_edge_worker_local(mb_data, &lf_info, thread, mb_pitch);
    }
    //YUV planes, then 2 more passes of Y plane
    vp8_loop_filter_horizontal_edge_worker_local(mb_data, &lf_info, dc_diffs, 4, thread, mb_pitch);
    if (plane == 0){
        vp8_loop_filter_horizontal_edge_worker_local(mb_data, &lf_info, dc_diffs, 8, thread, mb_pitch);
        vp8_loop_filter_horizontal_edge_worker_local(mb_data, &lf_info, dc_diffs, 12, thread, mb_pitch);
    }
    save_mb(num_threads, mb_data, s_base, source_offset, p, mb_row, mb_col, dc_diffs, thread);

#else
    //Load/stores directly out of global memory.
    if ( mb_col > 0 ){
        vp8_mbloop_filter_vertical_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }
    //YUV planes, then 2 more passes of Y plane
    vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
            dc_diffs, 1, thread, p);
    if (plane == 0){
        vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                dc_diffs, 2, thread, p);
        vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                dc_diffs, 3, thread, p);
    }
    write_mem_fence(CLK_GLOBAL_MEM_FENCE);

    if (mb_row > 0){
        vp8_mbloop_filter_horizontal_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }
    //YUV planes, then 2 more passes of Y plane
    vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
            dc_diffs, filter_level, 1, num_blocks, 3, thread, plane, block, p);
    if (plane == 0){
        vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 2, num_blocks, 1, thread, plane, block, p);
        vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 3, num_blocks, 1, thread, plane, block, p);
    }
#endif
}

kernel void vp8_loop_filter_horizontal_edges_kernel(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches, /* pitch */
    global loop_filter_info_n *lfi_n,
    global int *filters,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){
    size_t thread = get_global_id(0);
    size_t plane = get_global_id(1);
    size_t block = get_global_id(2);
    size_t num_blocks = get_global_size(2);

    int block_offset = block_offsets[priority_level];
    filters = &filters[4*block_offset];
    offsets = &offsets[3*block_offset];
    int filter_level = filters[block];
    int p = pitches[plane];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

    int source_offset = offsets[block*3 + plane];

    local loop_filter_info lf_info;
    set_lfi(lfi_n, &lf_info, frame_type, filter_level);

    int thread_level_filter = (thread<threads[plane]) & (filter_level!=0);
    int do_filter = filters[num_blocks*ROWS_LOCATION + block] > 0;
    do_filter &= thread_level_filter;
    if (do_filter){
        vp8_mbloop_filter_horizontal_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }

    //YUV planes, then 2 more passes of Y plane
    if (thread_level_filter){
        vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 1, num_blocks, 3, thread, plane, block, p);
        if (plane == 0){
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 2, num_blocks, 1, thread, plane, block, p);
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 3, num_blocks, 1, thread, plane, block, p);
        }
    }
}

kernel void vp8_loop_filter_vertical_edges_kernel(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){
    size_t thread = get_global_id(0);
    size_t plane = get_global_id(1);
    size_t block = get_global_id(2);
    size_t num_blocks = get_global_size(2);

    int block_offset = block_offsets[priority_level];

    filters = &filters[4*block_offset];
    offsets = &offsets[3*block_offset];
    int filter_level = filters[block];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

    int source_offset = offsets[block*3 + plane];

    local loop_filter_info lf_info;
    set_lfi(lfi_n, &lf_info, frame_type, filter_level);

    int p = pitches[plane];

    int thread_level_filter = (thread<threads[plane]) & (filter_level!=0);
    int do_filter = filters[num_blocks*COLS_LOCATION + block] > 0;
    do_filter &= thread_level_filter;
    if (do_filter){
        vp8_mbloop_filter_vertical_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }

    //YUV planes, then 2 more passes of Y plane
    if (thread_level_filter){
        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                dc_diffs, 1, thread, p);
        if (plane == 0){
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 2, thread, p);
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 3, thread, p);
        }
    }

}

void vp8_loop_filter_simple_horizontal_edge_worker
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    local loop_filter_info *lfi,
    global int *filters_in,
    int use_mbflim,
    int filter_type,
    int cur_iter,
    int priority_level,
    global int *block_offsets,
    global int *priority_num_blocks
){
    int filter_offset = 4*block_offsets[priority_level];
    private size_t block = get_global_id(2);
    size_t num_blocks = priority_num_blocks[priority_level];

    global int *filters = &filters_in[filter_offset];

    if (filters[num_blocks*filter_type + block] > 0){
        int filter_level = filters[block];
        if (filter_level){
            size_t i = get_global_id(0);
            int p = pitches[0];

            int s_off = cur_iter*4*p;
            s_off += i;

            signed char mask = 0;

            if (i < threads[0]){
                uchar flimit;
                if (use_mbflim == 0){
                    flimit = lfi->blim;
                } else {
                    flimit = lfi->mblim;
                }

                mask = vp8_simple_filter_mask(flimit, s_base[s_off-2*p], s_base[s_off-p], s_base[s_off], s_base[s_off+p]);
                vp8_simple_filter(mask, s_base, s_off - 2 * p, s_off - 1 * p, s_off, s_off + 1 * p);
            }
        }
    }
}

void vp8_loop_filter_simple_vertical_edge_worker(
    global unsigned char *s_base,
    global int *offsets, /* Y or YUV offsets for EACH block being processed*/
    global int *pitches, /* 1 or 3 values for Y or YUV pitches*/
    local loop_filter_info *lfi, /* Single struct for the frame */
    global int *filters_in, /* Filters for each block being processed */
    int use_mbflim, /* Use lfi->flim or lfi->mbflim, need once per kernel call */
    int filter_type, /* Should dc_diffs, rows, or cols be used?*/
    int cur_iter,
    int priority_level,
    global int *block_offsets,
    global int *priority_num_blocks
){
    int filter_offset = 4*block_offsets[priority_level];
    private size_t block = get_global_id(2);
    size_t num_blocks = priority_num_blocks[priority_level];

    global int *filters = &filters_in[filter_offset];

    if (filters[filter_type * num_blocks + block] > 0){
        int filter_level = filters[block];
        if (filter_level){
            size_t i = get_global_id(0);
            int p = pitches[0];

            int s_off = cur_iter*4;
            s_off += p * i;

            signed char mask = 0;

            if (i < threads[0]){
                uchar flimit;
                if (use_mbflim == 0){
                    flimit = lfi->blim;
                } else {
                    flimit = lfi->mblim;
                }

                mask = vp8_simple_filter_mask(flimit, s_base[s_off-2], s_base[s_off-1], s_base[s_off], s_base[s_off+1]);
                vp8_simple_filter(mask, s_base, s_off - 2, s_off - 1, s_off, s_off + 1);
            }
        }
    }
}

kernel void vp8_loop_filter_simple_vertical_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets, /* Y or YUV offsets for EACH block being processed*/
    global int *pitches, /* 1 or 3 values for Y or YUV pitches*/
    global loop_filter_info_n *lfi_n, /* Single struct for the frame */
    global int *filters_in, /* Filters for each block being processed */
    int filter_type, /* Should dc_diffs, rows, or cols be used?*/
    int priority_level,
    int num_levels,
    global int *block_offsets, //Number of previously processed blocks per level
    global int *priority_num_blocks,
    int frame_type
){

    local loop_filter_info lfi;
    int block = get_global_id(2);
    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset + block];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 1, COLS_LOCATION, 0, priority_level,
            block_offsets, priority_num_blocks
    );

    //3 Y plane iterations
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
            block_offsets, priority_num_blocks
    );
}

kernel void vp8_loop_filter_simple_horizontal_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){

    local loop_filter_info lfi;
    int block = get_global_id(2);
    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 1, ROWS_LOCATION, 0, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
            block_offsets, priority_num_blocks
    );
}

kernel void vp8_loop_filter_simple_all_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
)
{

    int block = (int)get_global_id(2);
    local loop_filter_info lfi;

    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset + block];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    if (block < priority_num_blocks[priority_level]){
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 1, COLS_LOCATION, 0, priority_level,
                block_offsets, priority_num_blocks
        );

        //3 Y plane iterations
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
                block_offsets, priority_num_blocks
        );
    }

    barrier(CLK_GLOBAL_MEM_FENCE);

    if (block < priority_num_blocks[priority_level]){
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 1, ROWS_LOCATION, 0, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
                block_offsets, priority_num_blocks
        );
    }
}

//Inline and non-kernel functions follow.
__inline void vp8_mbfilter_mem(
    signed char mask,
    uchar hev,
    uchar *base
)
{
    char4 u;

    char *pq = (char*)base;
    pq[0] ^= 0x80;
    pq[1] ^= 0x80;
    pq[2] ^= 0x80;
    pq[3] ^= 0x80;
    pq[4] ^= 0x80;
    pq[5] ^= 0x80;

    /* add outer taps if we have high edge variance */
    char vp8_filter = sub_sat(pq[2], pq[5]);
    vp8_filter = clamp(vp8_filter + 3 * (pq[4] - pq[3]), -128, 127);
    vp8_filter &= mask;

    char2 filter = (char2)vp8_filter;
    filter &= (char2)hev;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat(filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    pq[4] = sub_sat(pq[4], filter.s0);
    pq[3] = add_sat(pq[3], filter.s1);

    /* only apply wider filter if not high edge variance */
    filter.s1 = vp8_filter & ~hev;

    /* roughly 3/7th, 2/7th, and 1/7th difference across boundary */
    u.s0 = clamp((63 + filter.s1 * 27) >> 7, -128, 127);
    u.s1 = clamp((63 + filter.s1 * 18) >> 7, -128, 127);
    u.s2 = clamp((63 + filter.s1 * 9) >> 7, -128, 127);
    u.s3 = 0;

    char4 s;
    s = sub_sat(vload4(0, &pq[4]), u);
    pq[4] = s.s0 ^ 0x80;
    pq[5] = s.s1 ^ 0x80;
    pq[6] = s.s2 ^ 0x80;
    pq[7] = s.s3;

    s = add_sat(vload4(0, pq), u.s3210);
    pq[0] = s.s0;
    pq[1] = s.s1 ^ 0x80;
    pq[2] = s.s2 ^ 0x80;
    pq[3] = s.s3 ^ 0x80;
}

__inline uchar8 vp8_mbfilter(
    signed char mask,
    uchar hev,
    uchar8 base
)
{
    char4 u;

    char8 pq = as_char8(base);
    pq ^= (char8){0, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0};

    /* add outer taps if we have high edge variance */
    char vp8_filter = sub_sat(pq.s2, pq.s5);
    vp8_filter = clamp(vp8_filter + 3 * (pq.s4 - pq.s3), -128, 127);
    vp8_filter &= mask;

    char2 filter = (char2)vp8_filter;
    filter &= (char2)hev;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat(filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    pq.s4 = sub_sat(pq.s4, filter.s0);
    pq.s3 = add_sat(pq.s3, filter.s1);

    /* only apply wider filter if not high edge variance */
    filter.s1 = vp8_filter & ~hev;

    /* roughly 3/7th, 2/7th, and 1/7th difference across boundary */
    u.s0 = clamp((63 + filter.s1 * 27) >> 7, -128, 127);
    u.s1 = clamp((63 + filter.s1 * 18) >> 7, -128, 127);
    u.s2 = clamp((63 + filter.s1 * 9) >> 7, -128, 127);
    u.s3 = 0;

    char4 s;
    s = sub_sat(pq.s4567, u);
    pq.s4567 = s ^ (char4){0x80, 0x80, 0x80, 0};
    s = add_sat(pq.s0123, u.s3210);
    pq.s0123 = s ^ (char4){0, 0x80, 0x80, 0x80};

    return as_uchar8(pq);
}

__inline char vp8_hevmask_mem(uchar thresh, uchar *pq){
#if 0
    signed char hev = 0;
    hev  |= (abs(pq[0] - pq[1]) > thresh) * -1;
    hev  |= (abs(pq[3] - pq[2]) > thresh) * -1;
    return hev;
#else
    uchar mask = abs_diff(pq[0], pq[1]) > thresh;
    mask |= abs_diff(pq[3], pq[2]) > thresh;
    return ~mask + 1;
#endif
}

/* is there high variance internal edge ( 11111111 yes, 00000000 no) */
__inline char vp8_hevmask(uchar thresh, uchar4 pq)
{
    return ~any(abs_diff(pq.s03, pq.s12) > (uchar2)thresh) + 1;
}

__inline signed char vp8_filter_mask_mem(uc limit, uc blimit, uchar *pq)
{
    //Only apply the filter if the difference is LESS than 'limit'
    char mask = (abs_diff(pq[0], pq[1]) > limit);
    mask |= (abs_diff(pq[1], pq[2]) > limit);
    mask |= (abs_diff(pq[2], pq[3]) > limit);
    mask |= (abs_diff(pq[5], pq[4]) > limit);
    mask |= (abs_diff(pq[6], pq[5]) > limit);
    mask |= (abs_diff(pq[7], pq[6]) > limit);
    mask |= (abs_diff(pq[3], pq[4]) * 2 + abs_diff(pq[2], pq[5]) / 2  > blimit);
    return mask - 1;
}

/* should we apply any filter at all ( 11111111 yes, 00000000 no) */
__inline signed char vp8_filter_mask(uc limit, uc blimit, uchar8 pq)
{
#if 1
   //Only apply the filter if the difference is LESS than 'limit'
    signed char mask = (abs_diff(pq.s0, pq.s1) > limit);
    mask |= (abs_diff(pq.s1, pq.s2) > limit);
    mask |= (abs_diff(pq.s2, pq.s3) > limit);
    mask |= (abs_diff(pq.s5, pq.s4) > limit);
    mask |= (abs_diff(pq.s6, pq.s5) > limit);
    mask |= (abs_diff(pq.s7, pq.s6) > limit);
    mask |= (abs_diff(pq.s3, pq.s4) * 2 + abs_diff(pq.s2, pq.s5) / 2  > blimit);
    return mask - 1;
#else
	char8 mask8 = abs_diff(pq.s01256700, pq.s12345600) > limit;
	mask8 |= (char8)(abs_diff(pq.s3, pq.s4) * 2 + abs_diff(pq.s2, pq.s5) / 2 > blimit);
	mask8--;
	return any(mask8) ? -1 : 0;
#endif
}

/* should we apply any filter at all ( 11111111 yes, 00000000 no) */
__inline signed char vp8_simple_filter_mask(uc blimit, uc p1, uc p0, uc q0, uc q1)
{
    signed char mask = (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  <= blimit) * -1;
    return mask;
}

__inline void vp8_simple_filter(
    signed char mask,
    global uc *base,
    int op1_off,
    int op0_off,
    int oq0_off,
    int oq1_off
)
{

    global uc *op1 = base + op1_off;
    global uc *op0 = base + op0_off;
    global uc *oq0 = base + oq0_off;
    global uc *oq1 = base + oq1_off;

    signed char vp8_filter;
    char2 filter;

    char4 pq = (char4){*op1, *op0, *oq0, *oq1};
    pq ^= (char4)0x80;

    signed char u;

    vp8_filter = sub_sat(pq.s0, pq.s3);
    vp8_filter = clamp(vp8_filter + 3 * (pq.s2 - pq.s1), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat((char2)vp8_filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    u = sub_sat(pq.s2, filter.s0);
    *oq0  = u ^ 0x80;

    u = add_sat(pq.s1, filter.s1);
    *op0 = u ^ 0x80;
}

__inline void set_lfi(global loop_filter_info_n *lfi_n, local loop_filter_info *lfi, int frame_type, int filter_level){
    if (get_local_id(0) == 0 && get_local_id(1)==0 && get_local_id(2)==0){
        int hev_index = lfi_n->hev_thr_lut[frame_type][filter_level];
        lfi->mblim = lfi_n->mblim[filter_level][0];
        lfi->blim = lfi_n->blim[filter_level][0];
        lfi->lim = lfi_n->lim[filter_level][0];
        lfi->hev_thr = lfi_n->hev_thr[hev_index][0];
    }
}


Fixed some compile guides to synthetic test case code. There is currently small problem in instrumentation, because it does not remove noinline flag from safe version of kernel code.


backend: refine normalize function to pass cft

remove the call of length to (1)make faster (2) to pass param with 0x1.xxxp1023

Signed-off-by: rander.wang <5299db4a9bf784920a3e558099f6736bcd8939e6@intel.com>
Tested-by: Yang Rong <78759e37dc7114caed18f74e7515c5cb519dbf6d@intel.com>

/*
 * Copyright © 2012 - 2014 Intel Corporation
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 *
 */
#include "ocl_geometric.h"
#include "ocl_common.h"
#include "ocl_relational.h"
#if (__OPENCL_C_VERSION__ >= 200)
#include "ocl_math_20.h"
#else
#include "ocl_math.h"
#endif
#include "ocl_float.h"
#include "ocl_printf.h"
#include "ocl_workitem.h"

CONST float __gen_ocl_fabs(float x) __asm("llvm.fabs" ".f32");

OVERLOADABLE float dot(float p0, float p1) {
  return p0 * p1;
}
OVERLOADABLE float dot(float2 p0, float2 p1) {
  return p0.x * p1.x + p0.y * p1.y;
}
OVERLOADABLE float dot(float3 p0, float3 p1) {
  return p0.x * p1.x + p0.y * p1.y + p0.z * p1.z;
}
OVERLOADABLE float dot(float4 p0, float4 p1) {
  return p0.x * p1.x + p0.y * p1.y + p0.z * p1.z + p0.w * p1.w;
}
OVERLOADABLE half dot(half p0, half p1) {
  return p0 * p1;
}
OVERLOADABLE half dot(half2 p0, half2 p1) {
  return p0.x * p1.x + p0.y * p1.y;
}
OVERLOADABLE half dot(half3 p0, half3 p1) {
  return p0.x * p1.x + p0.y * p1.y + p0.z * p1.z;
}
OVERLOADABLE half dot(half4 p0, half4 p1) {
  return p0.x * p1.x + p0.y * p1.y + p0.z * p1.z + p0.w * p1.w;
}
OVERLOADABLE float length(float x) { return __gen_ocl_fabs(x); }

#define BODY \
  m = m==0.0f ? 1.0f : m; \
  m = isinf(m) ? 1.0f : m; \
  x = x/m; \
  return m * sqrt(dot(x,x));
OVERLOADABLE float length(float2 x) {
  float m = max(__gen_ocl_fabs(x.s0), __gen_ocl_fabs(x.s1));
  BODY;
}
OVERLOADABLE float length(float3 x) {
  float m = max(__gen_ocl_fabs(x.s0), max(__gen_ocl_fabs(x.s1), __gen_ocl_fabs(x.s2)));
  BODY;
}
OVERLOADABLE float length(float4 x) {
  float m = max(__gen_ocl_fabs(x.s0), max(__gen_ocl_fabs(x.s1), max(__gen_ocl_fabs(x.s2), __gen_ocl_fabs(x.s3))));
  BODY;
}
#undef BODY
OVERLOADABLE float distance(float x, float y) { return length(x-y); }
OVERLOADABLE float distance(float2 x, float2 y) { return length(x-y); }
OVERLOADABLE float distance(float3 x, float3 y) { return length(x-y); }
OVERLOADABLE float distance(float4 x, float4 y) { return length(x-y); }
OVERLOADABLE float normalize(float x) {
  float m = length(x);
  m = m == 0.0f ? 1.0f : m;
  return x / m;
}
OVERLOADABLE float2 normalize(float2 x) {
  float m = max(__gen_ocl_fabs(x.s0), __gen_ocl_fabs(x.s1));
  m = m == 0.0f ? 1.0f : m;
  m = isinf(m) ? 1.0f : m;
  x = x/m;
  return x*rsqrt(dot(x,x));
}
OVERLOADABLE float3 normalize(float3 x) {
 float m = max(__gen_ocl_fabs(x.s0), max(__gen_ocl_fabs(x.s1), __gen_ocl_fabs(x.s2)));
 m = m == 0.0f ? 1.0f : m;
 m = isinf(m) ? 1.0f : m;
 x = x/m;
 return x*rsqrt(dot(x,x));
}
OVERLOADABLE float4 normalize(float4 x) {
 float m = max(__gen_ocl_fabs(x.s0), max(__gen_ocl_fabs(x.s1), max(__gen_ocl_fabs(x.s2), __gen_ocl_fabs(x.s3))));
 m = m == 0.0f ? 1.0f : m;
 m = isinf(m) ? 1.0f : m;
 x = x/m;
 return x*rsqrt(dot(x,x));
}

OVERLOADABLE float fast_length(float x) { return __gen_ocl_fabs(x); }
OVERLOADABLE float fast_length(float2 x) { return sqrt(dot(x,x)); }
OVERLOADABLE float fast_length(float3 x) { return sqrt(dot(x,x)); }
OVERLOADABLE float fast_length(float4 x) { return sqrt(dot(x,x)); }
OVERLOADABLE float fast_distance(float x, float y) { return fast_length(x-y); }
OVERLOADABLE float fast_distance(float2 x, float2 y) { return fast_length(x-y); }
OVERLOADABLE float fast_distance(float3 x, float3 y) { return fast_length(x-y); }
OVERLOADABLE float fast_distance(float4 x, float4 y) { return fast_length(x-y); }
OVERLOADABLE float fast_normalize(float x) { return x > 0 ? 1.f : (x < 0 ? -1.f : 0.f); }
OVERLOADABLE float2 fast_normalize(float2 x) { return x * rsqrt(dot(x, x)); }
OVERLOADABLE float3 fast_normalize(float3 x) { return x * rsqrt(dot(x, x)); }
OVERLOADABLE float4 fast_normalize(float4 x) { return x * rsqrt(dot(x, x)); }

OVERLOADABLE float3 cross(float3 v0, float3 v1) {
   return v0.yzx*v1.zxy-v0.zxy*v1.yzx;
}
OVERLOADABLE float4 cross(float4 v0, float4 v1) {
   return (float4)(v0.yzx*v1.zxy-v0.zxy*v1.yzx, 0.f);
}

OVERLOADABLE double dot(double p0, double p1)
{
	return p0*p1;
}

OVERLOADABLE double dot(double2 p0, double2 p1)
{
	return p0.x*p1.x + p0.y*p1.y;
}

OVERLOADABLE double dot(double3 p0, double3 p1)
{
	return p0.x*p1.x + p0.y*p1.y + p0.z*p1.z;
}

OVERLOADABLE double dot(double4 p0, double4 p1)
{
	return p0.x * p1.x + p0.y * p1.y + p0.z * p1.z + p0.w * p1.w;
}

#define BODY \
  m = m==0.0 ? 1.0 : m; \
  m = isinf(m) ? 1.0 : m; \
  x = x/m; \
  return m * sqrt(dot(x,x));
OVERLOADABLE double length(double x)
{
	return fabs(x);
}

OVERLOADABLE double length(double2 x)
{
	double m = max(fabs(x.s0) , fabs(x.s1));
	BODY;
}

OVERLOADABLE double length(double3 x)
{
	double m = max(fabs(x.s0), max(fabs(x.s1), fabs(x.s2)));
	BODY;
}

OVERLOADABLE double length(double4 x)
{
	double m = max(fabs(x.s0), max(fabs(x.s1), max(fabs(x.s2), fabs(x.s3))));
	BODY;
}
#undef BODY

OVERLOADABLE double distance(double x, double y)
{
	return length(x-y);
}

OVERLOADABLE double distance(double2 x, double2 y)
{
	return length(x-y);
}

OVERLOADABLE double distance(double3 x, double3 y)
{
	return length(x-y);
}

OVERLOADABLE double distance(double4 x, double4 y)
{
	return length(x-y);
}

OVERLOADABLE double normalize(double x)
{
	double m = length(x);
	m = m == 0.0 ? 1.0 : m;
	return x / m;
}

OVERLOADABLE double2 normalize(double2 x)
{
	double m = max(fabs(x.s0) , fabs(x.s1));
         m = m==0.0 ? 1.0 : m;
         m = isinf(m) ? 1.0 : m;
         x = x/m;
         return x*rsqrt(dot(x,x));
}

OVERLOADABLE double3 normalize(double3 x)
{
	double m = max(fabs(x.s0), max(fabs(x.s1), fabs(x.s2)));
	m = m==0.0 ? 1.0 : m;
	m = isinf(m) ? 1.0 : m;
	x = x/m;
	return x*rsqrt(dot(x,x));
}

OVERLOADABLE double4 normalize(double4 x)
{
	double m = max(fabs(x.s0), max(fabs(x.s1), max(fabs(x.s2), fabs(x.s3))));
	m = m==0.0 ? 1.0 : m;
	m = isinf(m) ? 1.0 : m;
	x = x/m;
	return x*rsqrt(dot(x,x));
}

OVERLOADABLE double3 cross(double3 v0, double3 v1)
{
	return v0.yzx*v1.zxy-v0.zxy*v1.yzx;
}

OVERLOADABLE double4 cross(double4 v0, double4 v1)
{
	return (double4)(v0.yzx*v1.zxy-v0.zxy*v1.yzx, 0.0);
}

/*
 * Copyright © 2012 - 2014 Intel Corporation
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 *
 */
#include "ocl_geometric.h"
#include "ocl_common.h"
#include "ocl_relational.h"
#if (__OPENCL_C_VERSION__ >= 200)
#include "ocl_math_20.h"
#else
#include "ocl_math.h"
#endif
#include "ocl_float.h"
#include "ocl_printf.h"
#include "ocl_workitem.h"

CONST float __gen_ocl_fabs(float x) __asm("llvm.fabs" ".f32");

OVERLOADABLE float dot(float p0, float p1) {
  return p0 * p1;
}
OVERLOADABLE float dot(float2 p0, float2 p1) {
  return p0.x * p1.x + p0.y * p1.y;
}
OVERLOADABLE float dot(float3 p0, float3 p1) {
  return p0.x * p1.x + p0.y * p1.y + p0.z * p1.z;
}
OVERLOADABLE float dot(float4 p0, float4 p1) {
  return p0.x * p1.x + p0.y * p1.y + p0.z * p1.z + p0.w * p1.w;
}
OVERLOADABLE half dot(half p0, half p1) {
  return p0 * p1;
}
OVERLOADABLE half dot(half2 p0, half2 p1) {
  return p0.x * p1.x + p0.y * p1.y;
}
OVERLOADABLE half dot(half3 p0, half3 p1) {
  return p0.x * p1.x + p0.y * p1.y + p0.z * p1.z;
}
OVERLOADABLE half dot(half4 p0, half4 p1) {
  return p0.x * p1.x + p0.y * p1.y + p0.z * p1.z + p0.w * p1.w;
}
OVERLOADABLE float length(float x) { return __gen_ocl_fabs(x); }

#define BODY \
  m = m==0.0f ? 1.0f : m; \
  m = isinf(m) ? 1.0f : m; \
  x = x/m; \
  return m * sqrt(dot(x,x));
OVERLOADABLE float length(float2 x) {
  float m = max(__gen_ocl_fabs(x.s0), __gen_ocl_fabs(x.s1));
  BODY;
}
OVERLOADABLE float length(float3 x) {
  float m = max(__gen_ocl_fabs(x.s0), max(__gen_ocl_fabs(x.s1), __gen_ocl_fabs(x.s2)));
  BODY;
}
OVERLOADABLE float length(float4 x) {
  float m = max(__gen_ocl_fabs(x.s0), max(__gen_ocl_fabs(x.s1), max(__gen_ocl_fabs(x.s2), __gen_ocl_fabs(x.s3))));
  BODY;
}
#undef BODY
OVERLOADABLE float distance(float x, float y) { return length(x-y); }
OVERLOADABLE float distance(float2 x, float2 y) { return length(x-y); }
OVERLOADABLE float distance(float3 x, float3 y) { return length(x-y); }
OVERLOADABLE float distance(float4 x, float4 y) { return length(x-y); }
OVERLOADABLE float normalize(float x) {
  float m = length(x);
  m = m == 0.0f ? 1.0f : m;
  return x / m;
}
OVERLOADABLE float2 normalize(float2 x) {
  float m = length(x);
  m = m == 0.0f ? 1.0f : m;
  return x / m;
}
OVERLOADABLE float3 normalize(float3 x) {
  float m = length(x);
  m = m == 0.0f ? 1.0f : m;
  return x / m;
}
OVERLOADABLE float4 normalize(float4 x) {
  float m = length(x);
  m = m == 0.0f ? 1.0f : m;
  return x / m;
}

OVERLOADABLE float fast_length(float x) { return __gen_ocl_fabs(x); }
OVERLOADABLE float fast_length(float2 x) { return sqrt(dot(x,x)); }
OVERLOADABLE float fast_length(float3 x) { return sqrt(dot(x,x)); }
OVERLOADABLE float fast_length(float4 x) { return sqrt(dot(x,x)); }
OVERLOADABLE float fast_distance(float x, float y) { return fast_length(x-y); }
OVERLOADABLE float fast_distance(float2 x, float2 y) { return fast_length(x-y); }
OVERLOADABLE float fast_distance(float3 x, float3 y) { return fast_length(x-y); }
OVERLOADABLE float fast_distance(float4 x, float4 y) { return fast_length(x-y); }
OVERLOADABLE float fast_normalize(float x) { return x > 0 ? 1.f : (x < 0 ? -1.f : 0.f); }
OVERLOADABLE float2 fast_normalize(float2 x) { return x * rsqrt(dot(x, x)); }
OVERLOADABLE float3 fast_normalize(float3 x) { return x * rsqrt(dot(x, x)); }
OVERLOADABLE float4 fast_normalize(float4 x) { return x * rsqrt(dot(x, x)); }

OVERLOADABLE float3 cross(float3 v0, float3 v1) {
   return v0.yzx*v1.zxy-v0.zxy*v1.yzx;
}
OVERLOADABLE float4 cross(float4 v0, float4 v1) {
   return (float4)(v0.yzx*v1.zxy-v0.zxy*v1.yzx, 0.f);
}

OVERLOADABLE double dot(double p0, double p1)
{
	return p0*p1;
}

OVERLOADABLE double dot(double2 p0, double2 p1)
{
	return p0.x*p1.x + p0.y*p1.y;
}

OVERLOADABLE double dot(double3 p0, double3 p1)
{
	return p0.x*p1.x + p0.y*p1.y + p0.z*p1.z;
}

OVERLOADABLE double dot(double4 p0, double4 p1)
{
	return p0.x * p1.x + p0.y * p1.y + p0.z * p1.z + p0.w * p1.w;
}

#define BODY \
  m = m==0.0 ? 1.0 : m; \
  m = isinf(m) ? 1.0 : m; \
  x = x/m; \
  return m * sqrt(dot(x,x));
OVERLOADABLE double length(double x)
{
	return fabs(x);
}

OVERLOADABLE double length(double2 x)
{
	double m = max(fabs(x.s0), fabs(x.s1));
	BODY;
}

OVERLOADABLE double length(double3 x)
{
	double m = max(fabs(x.s0), max(fabs(x.s1), fabs(x.s2)));
	BODY;
}

OVERLOADABLE double length(double4 x)
{
	double m = max(fabs(x.s0), max(fabs(x.s1), max(fabs(x.s2), fabs(x.s3))));
	BODY;
}
#undef BODY

OVERLOADABLE double distance(double x, double y)
{
	return length(x-y);
}

OVERLOADABLE double distance(double2 x, double2 y)
{
	return length(x-y);
}

OVERLOADABLE double distance(double3 x, double3 y)
{
	return length(x-y);
}

OVERLOADABLE double distance(double4 x, double4 y)
{
	return length(x-y);
}

OVERLOADABLE double normalize(double x)
{
	return 1.0;
}

OVERLOADABLE double2 normalize(double2 x)
{
	double x2 = dot(x, x);
	return x * rsqrt(x2);
}

OVERLOADABLE double3 normalize(double3 x)
{
	double x2 = dot(x, x);
	return x * rsqrt(x2);
}

OVERLOADABLE double4 normalize(double4 x)
{
	double x2 = dot(x, x);
	return x * rsqrt(x2);
}

OVERLOADABLE double3 cross(double3 v0, double3 v1)
{
	return v0.yzx*v1.zxy-v0.zxy*v1.yzx;
}

OVERLOADABLE double4 cross(double4 v0, double4 v1)
{
	return (double4)(v0.yzx*v1.zxy-v0.zxy*v1.yzx, 0.0);
}