//
// Copyright (c) 2017 The Khronos Group Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

#include "function_list.h"
#include "test_functions.h"
#include "utility.h"

#include <string.h>

static int BuildKernelDouble(const char *name, int vectorSize,
                             cl_uint kernel_count, cl_kernel *k, cl_program *p,
                             bool relaxedMode)
{
    const char *c[] = { "#pragma OPENCL EXTENSION cl_khr_fp64 : enable\n",
                        "__kernel void math_kernel",
                        sizeNames[vectorSize],
                        "( __global long",
                        sizeNames[vectorSize],
                        "* out, __global double",
                        sizeNames[vectorSize],
                        "* in1, __global double",
                        sizeNames[vectorSize],
                        "* in2 )\n"
                        "{\n"
                        "   size_t i = get_global_id(0);\n"
                        "   out[i] = ",
                        name,
                        "( in1[i], in2[i] );\n"
                        "}\n" };

    const char *c3[] = {
        "#pragma OPENCL EXTENSION cl_khr_fp64 : enable\n",
        "__kernel void math_kernel",
        sizeNames[vectorSize],
        "( __global long* out, __global double* in, __global double* in2)\n"
        "{\n"
        "   size_t i = get_global_id(0);\n"
        "   if( i + 1 < get_global_size(0) )\n"
        "   {\n"
        "       double3 f0 = vload3( 0, in + 3 * i );\n"
        "       double3 f1 = vload3( 0, in2 + 3 * i );\n"
        "       long3 l0 = ",
        name,
        "( f0, f1 );\n"
        "       vstore3( l0, 0, out + 3*i );\n"
        "   }\n"
        "   else\n"
        "   {\n"
        "       size_t parity = i & 1;   // Figure out how many elements are "
        "left over after BUFFER_SIZE % (3*sizeof(float)). Assume power of two "
        "buffer size \n"
        "       double3 f0;\n"
        "       double3 f1;\n"
        "       switch( parity )\n"
        "       {\n"
        "           case 1:\n"
        "               f0 = (double3)( in[3*i], NAN, NAN ); \n"
        "               f1 = (double3)( in2[3*i], NAN, NAN ); \n"
        "               break;\n"
        "           case 0:\n"
        "               f0 = (double3)( in[3*i], in[3*i+1], NAN ); \n"
        "               f1 = (double3)( in2[3*i], in2[3*i+1], NAN ); \n"
        "               break;\n"
        "       }\n"
        "       long3 l0 = ",
        name,
        "( f0, f1 );\n"
        "       switch( parity )\n"
        "       {\n"
        "           case 0:\n"
        "               out[3*i+1] = l0.y; \n"
        "               // fall through\n"
        "           case 1:\n"
        "               out[3*i] = l0.x; \n"
        "               break;\n"
        "       }\n"
        "   }\n"
        "}\n"
    };

    const char **kern = c;
    size_t kernSize = sizeof(c) / sizeof(c[0]);

    if (sizeValues[vectorSize] == 3)
    {
        kern = c3;
        kernSize = sizeof(c3) / sizeof(c3[0]);
    }

    char testName[32];
    snprintf(testName, sizeof(testName) - 1, "math_kernel%s",
             sizeNames[vectorSize]);

    return MakeKernels(kern, (cl_uint)kernSize, testName, kernel_count, k, p,
                       relaxedMode);
}

typedef struct BuildKernelInfo
{
    cl_uint offset; // the first vector size to build
    cl_uint kernel_count;
    cl_kernel **kernels;
    cl_program *programs;
    const char *nameInCode;
    bool relaxedMode; // Whether to build with -cl-fast-relaxed-math.
} BuildKernelInfo;

static cl_int BuildKernel_DoubleFn(cl_uint job_id, cl_uint thread_id UNUSED,
                                   void *p)
{
    BuildKernelInfo *info = (BuildKernelInfo *)p;
    cl_uint i = info->offset + job_id;
    return BuildKernelDouble(info->nameInCode, i, info->kernel_count,
                             info->kernels[i], info->programs + i,
                             info->relaxedMode);
}

// Thread specific data for a worker thread
typedef struct ThreadInfo
{
    cl_mem inBuf; // input buffer for the thread
    cl_mem inBuf2; // input buffer for the thread
    cl_mem outBuf[VECTOR_SIZE_COUNT]; // output buffers for the thread
    MTdata d;
    cl_command_queue tQueue; // per thread command queue to improve performance
} ThreadInfo;

typedef struct TestInfo
{
    size_t subBufferSize; // Size of the sub-buffer in elements
    const Func *f; // A pointer to the function info
    cl_program programs[VECTOR_SIZE_COUNT]; // programs for various vector sizes
    cl_kernel
        *k[VECTOR_SIZE_COUNT]; // arrays of thread-specific kernels for each
                               // worker thread:  k[vector_size][thread_id]
    ThreadInfo *
        tinfo; // An array of thread specific information for each worker thread
    cl_uint threadCount; // Number of worker threads
    cl_uint jobCount; // Number of jobs
    cl_uint step; // step between each chunk and the next.
    cl_uint scale; // stride between individual test values
    int ftz; // non-zero if running in flush to zero mode

} TestInfo;

// A table of more difficult cases to get right
static const double specialValuesDouble[] = {
    -NAN,
    -INFINITY,
    -DBL_MAX,
    MAKE_HEX_DOUBLE(-0x1.0000000000001p64, -0x10000000000001LL, 12),
    MAKE_HEX_DOUBLE(-0x1.0p64, -0x1LL, 64),
    MAKE_HEX_DOUBLE(-0x1.fffffffffffffp63, -0x1fffffffffffffLL, 11),
    MAKE_HEX_DOUBLE(-0x1.0000000000001p63, -0x10000000000001LL, 11),
    MAKE_HEX_DOUBLE(-0x1.0p63, -0x1LL, 63),
    MAKE_HEX_DOUBLE(-0x1.fffffffffffffp62, -0x1fffffffffffffLL, 10),
    MAKE_HEX_DOUBLE(-0x1.000002p32, -0x1000002LL, 8),
    MAKE_HEX_DOUBLE(-0x1.0p32, -0x1LL, 32),
    MAKE_HEX_DOUBLE(-0x1.fffffffffffffp31, -0x1fffffffffffffLL, -21),
    MAKE_HEX_DOUBLE(-0x1.0000000000001p31, -0x10000000000001LL, -21),
    MAKE_HEX_DOUBLE(-0x1.0p31, -0x1LL, 31),
    MAKE_HEX_DOUBLE(-0x1.fffffffffffffp30, -0x1fffffffffffffLL, -22),
    -1000.,
    -100.,
    -4.0,
    -3.5,
    -3.0,
    MAKE_HEX_DOUBLE(-0x1.8000000000001p1, -0x18000000000001LL, -51),
    -2.5,
    MAKE_HEX_DOUBLE(-0x1.7ffffffffffffp1, -0x17ffffffffffffLL, -51),
    -2.0,
    MAKE_HEX_DOUBLE(-0x1.8000000000001p0, -0x18000000000001LL, -52),
    -1.5,
    MAKE_HEX_DOUBLE(-0x1.7ffffffffffffp0, -0x17ffffffffffffLL, -52),
    MAKE_HEX_DOUBLE(-0x1.0000000000001p0, -0x10000000000001LL, -52),
    -1.0,
    MAKE_HEX_DOUBLE(-0x1.fffffffffffffp-1, -0x1fffffffffffffLL, -53),
    MAKE_HEX_DOUBLE(-0x1.0000000000001p-1, -0x10000000000001LL, -53),
    -0.5,
    MAKE_HEX_DOUBLE(-0x1.fffffffffffffp-2, -0x1fffffffffffffLL, -54),
    MAKE_HEX_DOUBLE(-0x1.0000000000001p-2, -0x10000000000001LL, -54),
    -0.25,
    MAKE_HEX_DOUBLE(-0x1.fffffffffffffp-3, -0x1fffffffffffffLL, -55),
    MAKE_HEX_DOUBLE(-0x1.0000000000001p-1022, -0x10000000000001LL, -1074),
    -DBL_MIN,
    MAKE_HEX_DOUBLE(-0x0.fffffffffffffp-1022, -0x0fffffffffffffLL, -1074),
    MAKE_HEX_DOUBLE(-0x0.0000000000fffp-1022, -0x00000000000fffLL, -1074),
    MAKE_HEX_DOUBLE(-0x0.00000000000fep-1022, -0x000000000000feLL, -1074),
    MAKE_HEX_DOUBLE(-0x0.000000000000ep-1022, -0x0000000000000eLL, -1074),
    MAKE_HEX_DOUBLE(-0x0.000000000000cp-1022, -0x0000000000000cLL, -1074),
    MAKE_HEX_DOUBLE(-0x0.000000000000ap-1022, -0x0000000000000aLL, -1074),
    MAKE_HEX_DOUBLE(-0x0.0000000000008p-1022, -0x00000000000008LL, -1074),
    MAKE_HEX_DOUBLE(-0x0.0000000000007p-1022, -0x00000000000007LL, -1074),
    MAKE_HEX_DOUBLE(-0x0.0000000000006p-1022, -0x00000000000006LL, -1074),
    MAKE_HEX_DOUBLE(-0x0.0000000000005p-1022, -0x00000000000005LL, -1074),
    MAKE_HEX_DOUBLE(-0x0.0000000000004p-1022, -0x00000000000004LL, -1074),
    MAKE_HEX_DOUBLE(-0x0.0000000000003p-1022, -0x00000000000003LL, -1074),
    MAKE_HEX_DOUBLE(-0x0.0000000000002p-1022, -0x00000000000002LL, -1074),
    MAKE_HEX_DOUBLE(-0x0.0000000000001p-1022, -0x00000000000001LL, -1074),
    -0.0,

    +NAN,
    +INFINITY,
    +DBL_MAX,
    MAKE_HEX_DOUBLE(+0x1.0000000000001p64, +0x10000000000001LL, 12),
    MAKE_HEX_DOUBLE(+0x1.0p64, +0x1LL, 64),
    MAKE_HEX_DOUBLE(+0x1.fffffffffffffp63, +0x1fffffffffffffLL, 11),
    MAKE_HEX_DOUBLE(+0x1.0000000000001p63, +0x10000000000001LL, 11),
    MAKE_HEX_DOUBLE(+0x1.0p63, +0x1LL, 63),
    MAKE_HEX_DOUBLE(+0x1.fffffffffffffp62, +0x1fffffffffffffLL, 10),
    MAKE_HEX_DOUBLE(+0x1.000002p32, +0x1000002LL, 8),
    MAKE_HEX_DOUBLE(+0x1.0p32, +0x1LL, 32),
    MAKE_HEX_DOUBLE(+0x1.fffffffffffffp31, +0x1fffffffffffffLL, -21),
    MAKE_HEX_DOUBLE(+0x1.0000000000001p31, +0x10000000000001LL, -21),
    MAKE_HEX_DOUBLE(+0x1.0p31, +0x1LL, 31),
    MAKE_HEX_DOUBLE(+0x1.fffffffffffffp30, +0x1fffffffffffffLL, -22),
    +1000.,
    +100.,
    +4.0,
    +3.5,
    +3.0,
    MAKE_HEX_DOUBLE(+0x1.8000000000001p1, +0x18000000000001LL, -51),
    +2.5,
    MAKE_HEX_DOUBLE(+0x1.7ffffffffffffp1, +0x17ffffffffffffLL, -51),
    +2.0,
    MAKE_HEX_DOUBLE(+0x1.8000000000001p0, +0x18000000000001LL, -52),
    +1.5,
    MAKE_HEX_DOUBLE(+0x1.7ffffffffffffp0, +0x17ffffffffffffLL, -52),
    MAKE_HEX_DOUBLE(-0x1.0000000000001p0, -0x10000000000001LL, -52),
    +1.0,
    MAKE_HEX_DOUBLE(+0x1.fffffffffffffp-1, +0x1fffffffffffffLL, -53),
    MAKE_HEX_DOUBLE(+0x1.0000000000001p-1, +0x10000000000001LL, -53),
    +0.5,
    MAKE_HEX_DOUBLE(+0x1.fffffffffffffp-2, +0x1fffffffffffffLL, -54),
    MAKE_HEX_DOUBLE(+0x1.0000000000001p-2, +0x10000000000001LL, -54),
    +0.25,
    MAKE_HEX_DOUBLE(+0x1.fffffffffffffp-3, +0x1fffffffffffffLL, -55),
    MAKE_HEX_DOUBLE(+0x1.0000000000001p-1022, +0x10000000000001LL, -1074),
    +DBL_MIN,
    MAKE_HEX_DOUBLE(+0x0.fffffffffffffp-1022, +0x0fffffffffffffLL, -1074),
    MAKE_HEX_DOUBLE(+0x0.0000000000fffp-1022, +0x00000000000fffLL, -1074),
    MAKE_HEX_DOUBLE(+0x0.00000000000fep-1022, +0x000000000000feLL, -1074),
    MAKE_HEX_DOUBLE(+0x0.000000000000ep-1022, +0x0000000000000eLL, -1074),
    MAKE_HEX_DOUBLE(+0x0.000000000000cp-1022, +0x0000000000000cLL, -1074),
    MAKE_HEX_DOUBLE(+0x0.000000000000ap-1022, +0x0000000000000aLL, -1074),
    MAKE_HEX_DOUBLE(+0x0.0000000000008p-1022, +0x00000000000008LL, -1074),
    MAKE_HEX_DOUBLE(+0x0.0000000000007p-1022, +0x00000000000007LL, -1074),
    MAKE_HEX_DOUBLE(+0x0.0000000000006p-1022, +0x00000000000006LL, -1074),
    MAKE_HEX_DOUBLE(+0x0.0000000000005p-1022, +0x00000000000005LL, -1074),
    MAKE_HEX_DOUBLE(+0x0.0000000000004p-1022, +0x00000000000004LL, -1074),
    MAKE_HEX_DOUBLE(+0x0.0000000000003p-1022, +0x00000000000003LL, -1074),
    MAKE_HEX_DOUBLE(+0x0.0000000000002p-1022, +0x00000000000002LL, -1074),
    MAKE_HEX_DOUBLE(+0x0.0000000000001p-1022, +0x00000000000001LL, -1074),
    +0.0,
};

static size_t specialValuesDoubleCount =
    sizeof(specialValuesDouble) / sizeof(specialValuesDouble[0]);

static cl_int TestDouble(cl_uint job_id, cl_uint thread_id, void *p);

int TestMacro_Int_Double_Double(const Func *f, MTdata d, bool relaxedMode)
{
    TestInfo test_info;
    cl_int error;
    size_t i, j;

    logFunctionInfo(f->name, sizeof(cl_double), relaxedMode);

    // Init test_info
    memset(&test_info, 0, sizeof(test_info));
    test_info.threadCount = GetThreadCount();
    test_info.subBufferSize = BUFFER_SIZE
        / (sizeof(cl_double) * RoundUpToNextPowerOfTwo(test_info.threadCount));
    test_info.scale = getTestScale(sizeof(cl_double));

    if (gWimpyMode)
    {
        test_info.subBufferSize = gWimpyBufferSize
            / (sizeof(cl_double)
               * RoundUpToNextPowerOfTwo(test_info.threadCount));
    }

    test_info.step = (cl_uint)test_info.subBufferSize * test_info.scale;
    if (test_info.step / test_info.subBufferSize != test_info.scale)
    {
        // there was overflow
        test_info.jobCount = 1;
    }
    else
    {
        test_info.jobCount = (cl_uint)((1ULL << 32) / test_info.step);
    }

    test_info.f = f;
    test_info.ftz = f->ftz || gForceFTZ;

    // cl_kernels aren't thread safe, so we make one for each vector size for
    // every thread
    for (i = gMinVectorSizeIndex; i < gMaxVectorSizeIndex; i++)
    {
        size_t array_size = test_info.threadCount * sizeof(cl_kernel);
        test_info.k[i] = (cl_kernel *)malloc(array_size);
        if (NULL == test_info.k[i])
        {
            vlog_error("Error: Unable to allocate storage for kernels!\n");
            error = CL_OUT_OF_HOST_MEMORY;
            goto exit;
        }
        memset(test_info.k[i], 0, array_size);
    }
    test_info.tinfo =
        (ThreadInfo *)malloc(test_info.threadCount * sizeof(*test_info.tinfo));
    if (NULL == test_info.tinfo)
    {
        vlog_error(
            "Error: Unable to allocate storage for thread specific data.\n");
        error = CL_OUT_OF_HOST_MEMORY;
        goto exit;
    }
    memset(test_info.tinfo, 0,
           test_info.threadCount * sizeof(*test_info.tinfo));
    for (i = 0; i < test_info.threadCount; i++)
    {
        cl_buffer_region region = {
            i * test_info.subBufferSize * sizeof(cl_double),
            test_info.subBufferSize * sizeof(cl_double)
        };
        test_info.tinfo[i].inBuf =
            clCreateSubBuffer(gInBuffer, CL_MEM_READ_ONLY,
                              CL_BUFFER_CREATE_TYPE_REGION, &region, &error);
        if (error || NULL == test_info.tinfo[i].inBuf)
        {
            vlog_error("Error: Unable to create sub-buffer of gInBuffer for "
                       "region {%zd, %zd}\n",
                       region.origin, region.size);
            goto exit;
        }
        test_info.tinfo[i].inBuf2 =
            clCreateSubBuffer(gInBuffer2, CL_MEM_READ_ONLY,
                              CL_BUFFER_CREATE_TYPE_REGION, &region, &error);
        if (error || NULL == test_info.tinfo[i].inBuf2)
        {
            vlog_error("Error: Unable to create sub-buffer of gInBuffer2 for "
                       "region {%zd, %zd}\n",
                       region.origin, region.size);
            goto exit;
        }

        for (j = gMinVectorSizeIndex; j < gMaxVectorSizeIndex; j++)
        {
            test_info.tinfo[i].outBuf[j] = clCreateSubBuffer(
                gOutBuffer[j], CL_MEM_WRITE_ONLY, CL_BUFFER_CREATE_TYPE_REGION,
                &region, &error);
            if (error || NULL == test_info.tinfo[i].outBuf[j])
            {
                vlog_error("Error: Unable to create sub-buffer of gInBuffer "
                           "for region {%zd, %zd}\n",
                           region.origin, region.size);
                goto exit;
            }
        }
        test_info.tinfo[i].tQueue =
            clCreateCommandQueue(gContext, gDevice, 0, &error);
        if (NULL == test_info.tinfo[i].tQueue || error)
        {
            vlog_error("clCreateCommandQueue failed. (%d)\n", error);
            goto exit;
        }

        test_info.tinfo[i].d = init_genrand(genrand_int32(d));
    }

    // Init the kernels
    {
        BuildKernelInfo build_info = {
            gMinVectorSizeIndex, test_info.threadCount, test_info.k,
            test_info.programs,  f->nameInCode,         relaxedMode
        };
        if ((error = ThreadPool_Do(BuildKernel_DoubleFn,
                                   gMaxVectorSizeIndex - gMinVectorSizeIndex,
                                   &build_info)))
            goto exit;
    }

    // Run the kernels
    if (!gSkipCorrectnessTesting)
    {
        error = ThreadPool_Do(TestDouble, test_info.jobCount, &test_info);

        if (error) goto exit;

        if (gWimpyMode)
            vlog("Wimp pass");
        else
            vlog("passed");
    }

    if (gMeasureTimes)
    {
        // Init input arrays
        cl_ulong *p = (cl_ulong *)gIn;
        cl_ulong *p2 = (cl_ulong *)gIn2;
        for (j = 0; j < BUFFER_SIZE / sizeof(double); j++)
        {
            p[j] =
                (cl_ulong)genrand_int32(d) | ((cl_ulong)genrand_int32(d) << 32);
            p2[j] =
                (cl_ulong)genrand_int32(d) | ((cl_ulong)genrand_int32(d) << 32);
        }

        if ((error = clEnqueueWriteBuffer(gQueue, gInBuffer, CL_FALSE, 0,
                                          BUFFER_SIZE, gIn, 0, NULL, NULL)))
        {
            vlog_error("\n*** Error %d in clEnqueueWriteBuffer ***\n", error);
            return error;
        }

        if ((error = clEnqueueWriteBuffer(gQueue, gInBuffer2, CL_FALSE, 0,
                                          BUFFER_SIZE, gIn2, 0, NULL, NULL)))
        {
            vlog_error("\n*** Error %d in clEnqueueWriteBuffer2 ***\n", error);
            return error;
        }

        // Run the kernels
        for (j = gMinVectorSizeIndex; j < gMaxVectorSizeIndex; j++)
        {
            size_t vectorSize = sizeof(cl_double) * sizeValues[j];
            size_t localCount = (BUFFER_SIZE + vectorSize - 1)
                / vectorSize; // BUFFER_SIZE / vectorSize  rounded up
            if ((error = clSetKernelArg(test_info.k[j][0], 0,
                                        sizeof(gOutBuffer[j]), &gOutBuffer[j])))
            {
                LogBuildError(test_info.programs[j]);
                goto exit;
            }
            if ((error = clSetKernelArg(test_info.k[j][0], 1, sizeof(gInBuffer),
                                        &gInBuffer)))
            {
                LogBuildError(test_info.programs[j]);
                goto exit;
            }
            if ((error = clSetKernelArg(test_info.k[j][0], 2,
                                        sizeof(gInBuffer2), &gInBuffer2)))
            {
                LogBuildError(test_info.programs[j]);
                goto exit;
            }

            double sum = 0.0;
            double bestTime = INFINITY;
            for (i = 0; i < PERF_LOOP_COUNT; i++)
            {
                uint64_t startTime = GetTime();
                if ((error = clEnqueueNDRangeKernel(gQueue, test_info.k[j][0],
                                                    1, NULL, &localCount, NULL,
                                                    0, NULL, NULL)))
                {
                    vlog_error("FAILED -- could not execute kernel\n");
                    goto exit;
                }

                // Make sure OpenCL is done
                if ((error = clFinish(gQueue)))
                {
                    vlog_error("Error %d at clFinish\n", error);
                    goto exit;
                }

                uint64_t endTime = GetTime();
                double time = SubtractTime(endTime, startTime);
                sum += time;
                if (time < bestTime) bestTime = time;
            }

            if (gReportAverageTimes) bestTime = sum / PERF_LOOP_COUNT;
            double clocksPerOp = bestTime * (double)gDeviceFrequency
                * gComputeDevices * gSimdSize * 1e6
                / (BUFFER_SIZE / sizeof(double));
            vlog_perf(clocksPerOp, LOWER_IS_BETTER, "clocks / element", "%sD%s",
                      f->name, sizeNames[j]);
        }
        for (; j < gMaxVectorSizeIndex; j++) vlog("\t     -- ");
    }

    vlog("\n");

exit:
    // Release
    for (i = gMinVectorSizeIndex; i < gMaxVectorSizeIndex; i++)
    {
        clReleaseProgram(test_info.programs[i]);
        if (test_info.k[i])
        {
            for (j = 0; j < test_info.threadCount; j++)
                clReleaseKernel(test_info.k[i][j]);

            free(test_info.k[i]);
        }
    }
    if (test_info.tinfo)
    {
        for (i = 0; i < test_info.threadCount; i++)
        {
            free_mtdata(test_info.tinfo[i].d);
            clReleaseMemObject(test_info.tinfo[i].inBuf);
            clReleaseMemObject(test_info.tinfo[i].inBuf2);
            for (j = gMinVectorSizeIndex; j < gMaxVectorSizeIndex; j++)
                clReleaseMemObject(test_info.tinfo[i].outBuf[j]);
            clReleaseCommandQueue(test_info.tinfo[i].tQueue);
        }

        free(test_info.tinfo);
    }

    return error;
}

static cl_int TestDouble(cl_uint job_id, cl_uint thread_id, void *data)
{
    const TestInfo *job = (const TestInfo *)data;
    size_t buffer_elements = job->subBufferSize;
    size_t buffer_size = buffer_elements * sizeof(cl_double);
    cl_uint base = job_id * (cl_uint)job->step;
    ThreadInfo *tinfo = job->tinfo + thread_id;
    dptr dfunc = job->f->dfunc;
    int ftz = job->ftz;
    MTdata d = tinfo->d;
    cl_uint j, k;
    cl_int error;
    const char *name = job->f->name;
    cl_long *t;
    cl_long *r;
    cl_double *s;
    cl_double *s2;

    Force64BitFPUPrecision();

    // start the map of the output arrays
    cl_event e[VECTOR_SIZE_COUNT];
    cl_long *out[VECTOR_SIZE_COUNT];
    for (j = gMinVectorSizeIndex; j < gMaxVectorSizeIndex; j++)
    {
        out[j] = (cl_long *)clEnqueueMapBuffer(
            tinfo->tQueue, tinfo->outBuf[j], CL_FALSE, CL_MAP_WRITE, 0,
            buffer_size, 0, NULL, e + j, &error);
        if (error || NULL == out[j])
        {
            vlog_error("Error: clEnqueueMapBuffer %d failed! err: %d\n", j,
                       error);
            return error;
        }
    }

    // Get that moving
    if ((error = clFlush(tinfo->tQueue))) vlog("clFlush failed\n");

    // Init input array
    double *p = (double *)gIn + thread_id * buffer_elements;
    double *p2 = (double *)gIn2 + thread_id * buffer_elements;
    j = 0;
    int totalSpecialValueCount =
        specialValuesDoubleCount * specialValuesDoubleCount;
    int indx = (totalSpecialValueCount - 1) / buffer_elements;

    if (job_id <= (cl_uint)indx)
    { // test edge cases
        uint32_t x, y;

        x = (job_id * buffer_elements) % specialValuesDoubleCount;
        y = (job_id * buffer_elements) / specialValuesDoubleCount;

        for (; j < buffer_elements; j++)
        {
            p[j] = specialValuesDouble[x];
            p2[j] = specialValuesDouble[y];
            if (++x >= specialValuesDoubleCount)
            {
                x = 0;
                y++;
                if (y >= specialValuesDoubleCount) break;
            }
        }
    }

    // Init any remaining values.
    for (; j < buffer_elements; j++)
    {
        ((cl_ulong *)p)[j] = genrand_int64(d);
        ((cl_ulong *)p2)[j] = genrand_int64(d);
    }

    if ((error = clEnqueueWriteBuffer(tinfo->tQueue, tinfo->inBuf, CL_FALSE, 0,
                                      buffer_size, p, 0, NULL, NULL)))
    {
        vlog_error("Error: clEnqueueWriteBuffer failed! err: %d\n", error);
        goto exit;
    }

    if ((error = clEnqueueWriteBuffer(tinfo->tQueue, tinfo->inBuf2, CL_FALSE, 0,
                                      buffer_size, p2, 0, NULL, NULL)))
    {
        vlog_error("Error: clEnqueueWriteBuffer failed! err: %d\n", error);
        goto exit;
    }

    for (j = gMinVectorSizeIndex; j < gMaxVectorSizeIndex; j++)
    {
        // Wait for the map to finish
        if ((error = clWaitForEvents(1, e + j)))
        {
            vlog_error("Error: clWaitForEvents failed! err: %d\n", error);
            goto exit;
        }
        if ((error = clReleaseEvent(e[j])))
        {
            vlog_error("Error: clReleaseEvent failed! err: %d\n", error);
            goto exit;
        }

        // Fill the result buffer with garbage, so that old results don't carry
        // over
        uint32_t pattern = 0xffffdead;
        memset_pattern4(out[j], &pattern, buffer_size);
        if ((error = clEnqueueUnmapMemObject(tinfo->tQueue, tinfo->outBuf[j],
                                             out[j], 0, NULL, NULL)))
        {
            vlog_error("Error: clEnqueueMapBuffer failed! err: %d\n", error);
            goto exit;
        }

        // run the kernel
        size_t vectorCount =
            (buffer_elements + sizeValues[j] - 1) / sizeValues[j];
        cl_kernel kernel = job->k[j][thread_id]; // each worker thread has its
                                                 // own copy of the cl_kernel
        cl_program program = job->programs[j];

        if ((error = clSetKernelArg(kernel, 0, sizeof(tinfo->outBuf[j]),
                                    &tinfo->outBuf[j])))
        {
            LogBuildError(program);
            return error;
        }
        if ((error = clSetKernelArg(kernel, 1, sizeof(tinfo->inBuf),
                                    &tinfo->inBuf)))
        {
            LogBuildError(program);
            return error;
        }
        if ((error = clSetKernelArg(kernel, 2, sizeof(tinfo->inBuf2),
                                    &tinfo->inBuf2)))
        {
            LogBuildError(program);
            return error;
        }

        if ((error = clEnqueueNDRangeKernel(tinfo->tQueue, kernel, 1, NULL,
                                            &vectorCount, NULL, 0, NULL, NULL)))
        {
            vlog_error("FAILED -- could not execute kernel\n");
            goto exit;
        }
    }

    // Get that moving
    if ((error = clFlush(tinfo->tQueue))) vlog("clFlush 2 failed\n");

    if (gSkipCorrectnessTesting) return CL_SUCCESS;

    // Calculate the correctly rounded reference result
    r = (cl_long *)gOut_Ref + thread_id * buffer_elements;
    s = (cl_double *)gIn + thread_id * buffer_elements;
    s2 = (cl_double *)gIn2 + thread_id * buffer_elements;
    for (j = 0; j < buffer_elements; j++) r[j] = dfunc.i_ff(s[j], s2[j]);


    // Read the data back -- no need to wait for the first N-1 buffers. This is
    // an in order queue.
    for (j = gMinVectorSizeIndex; j + 1 < gMaxVectorSizeIndex; j++)
    {
        out[j] = (cl_long *)clEnqueueMapBuffer(
            tinfo->tQueue, tinfo->outBuf[j], CL_FALSE, CL_MAP_READ, 0,
            buffer_size, 0, NULL, NULL, &error);
        if (error || NULL == out[j])
        {
            vlog_error("Error: clEnqueueMapBuffer %d failed! err: %d\n", j,
                       error);
            goto exit;
        }
    }

    // Wait for the last buffer
    out[j] = (cl_long *)clEnqueueMapBuffer(tinfo->tQueue, tinfo->outBuf[j],
                                           CL_TRUE, CL_MAP_READ, 0, buffer_size,
                                           0, NULL, NULL, &error);
    if (error || NULL == out[j])
    {
        vlog_error("Error: clEnqueueMapBuffer %d failed! err: %d\n", j, error);
        goto exit;
    }

    // Verify data
    t = (cl_long *)r;
    for (j = 0; j < buffer_elements; j++)
    {
        cl_long *q = out[0];

        // If we aren't getting the correctly rounded result
        if (gMinVectorSizeIndex == 0 && t[j] != q[j])
        {
            // If we aren't getting the correctly rounded result
            if (ftz)
            {
                if (IsDoubleSubnormal(s[j]))
                {
                    if (IsDoubleSubnormal(s2[j]))
                    {
                        int64_t correct = dfunc.i_ff(0.0f, 0.0f);
                        int64_t correct2 = dfunc.i_ff(0.0f, -0.0f);
                        int64_t correct3 = dfunc.i_ff(-0.0f, 0.0f);
                        int64_t correct4 = dfunc.i_ff(-0.0f, -0.0f);

                        if (correct == q[j] || correct2 == q[j]
                            || correct3 == q[j] || correct4 == q[j])
                            continue;
                    }
                    else
                    {
                        int64_t correct = dfunc.i_ff(0.0f, s2[j]);
                        int64_t correct2 = dfunc.i_ff(-0.0f, s2[j]);
                        if (correct == q[j] || correct2 == q[j]) continue;
                    }
                }
                else if (IsDoubleSubnormal(s2[j]))
                {
                    int64_t correct = dfunc.i_ff(s[j], 0.0f);
                    int64_t correct2 = dfunc.i_ff(s[j], -0.0f);
                    if (correct == q[j] || correct2 == q[j]) continue;
                }
            }

            cl_ulong err = t[j] - q[j];
            if (q[j] > t[j]) err = q[j] - t[j];
            vlog_error("\nERROR: %s: %lld ulp error at {%.13la, %.13la}: *%lld "
                       "vs. %lld  (index: %d)\n",
                       name, err, ((double *)s)[j], ((double *)s2)[j], t[j],
                       q[j], j);
            error = -1;
            goto exit;
        }


        for (k = MAX(1, gMinVectorSizeIndex); k < gMaxVectorSizeIndex; k++)
        {
            q = (cl_long *)out[k];
            // If we aren't getting the correctly rounded result
            if (-t[j] != q[j])
            {
                if (ftz)
                {
                    if (IsDoubleSubnormal(s[j]))
                    {
                        if (IsDoubleSubnormal(s2[j]))
                        {
                            int64_t correct = -dfunc.i_ff(0.0f, 0.0f);
                            int64_t correct2 = -dfunc.i_ff(0.0f, -0.0f);
                            int64_t correct3 = -dfunc.i_ff(-0.0f, 0.0f);
                            int64_t correct4 = -dfunc.i_ff(-0.0f, -0.0f);

                            if (correct == q[j] || correct2 == q[j]
                                || correct3 == q[j] || correct4 == q[j])
                                continue;
                        }
                        else
                        {
                            int64_t correct = -dfunc.i_ff(0.0f, s2[j]);
                            int64_t correct2 = -dfunc.i_ff(-0.0f, s2[j]);
                            if (correct == q[j] || correct2 == q[j]) continue;
                        }
                    }
                    else if (IsDoubleSubnormal(s2[j]))
                    {
                        int64_t correct = -dfunc.i_ff(s[j], 0.0f);
                        int64_t correct2 = -dfunc.i_ff(s[j], -0.0f);
                        if (correct == q[j] || correct2 == q[j]) continue;
                    }
                }

                cl_ulong err = -t[j] - q[j];
                if (q[j] > -t[j]) err = q[j] + t[j];
                vlog_error("\nERROR: %sD%s: %lld ulp error at {%.13la, "
                           "%.13la}: *%lld vs. %lld  (index: %d)\n",
                           name, sizeNames[k], err, ((double *)s)[j],
                           ((double *)s2)[j], -t[j], q[j], j);
                error = -1;
                goto exit;
            }
        }
    }

    for (j = gMinVectorSizeIndex; j < gMaxVectorSizeIndex; j++)
    {
        if ((error = clEnqueueUnmapMemObject(tinfo->tQueue, tinfo->outBuf[j],
                                             out[j], 0, NULL, NULL)))
        {
            vlog_error("Error: clEnqueueUnmapMemObject %d failed 2! err: %d\n",
                       j, error);
            return error;
        }
    }

    if ((error = clFlush(tinfo->tQueue))) vlog("clFlush 3 failed\n");


    if (0 == (base & 0x0fffffff))
    {
        if (gVerboseBruteForce)
        {
            vlog("base:%14u step:%10u scale:%10u buf_elements:%10zd "
                 "ThreadCount:%2u\n",
                 base, job->step, job->scale, buffer_elements,
                 job->threadCount);
        }
        else
        {
            vlog(".");
        }
        fflush(stdout);
    }

exit:
    return error;
}