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

#include <cstring>

namespace {

const double twoToMinus1022 = MAKE_HEX_DOUBLE(0x1p-1022, 1, -1022);

cl_int BuildKernelFn(cl_uint job_id, cl_uint thread_id UNUSED, void *p)
{
    BuildKernelInfo &info = *(BuildKernelInfo *)p;
    auto generator = [](const std::string &kernel_name, const char *builtin,
                        cl_uint vector_size_index) {
        return GetBinaryKernel(kernel_name, builtin, ParameterType::Double,
                               ParameterType::Double, ParameterType::Double,
                               vector_size_index);
    };
    return BuildKernels(info, job_id, generator);
}

// Thread specific data for a worker thread
struct ThreadInfo
{
    // Input and output buffers for the thread
    clMemWrapper inBuf;
    clMemWrapper inBuf2;
    Buffers outBuf;

    float maxError; // max error value. Init to 0.
    double
        maxErrorValue; // position of the max error value (param 1).  Init to 0.
    double maxErrorValue2; // position of the max error value (param 2).  Init
                           // to 0.
    MTdataHolder d;

    // Per thread command queue to improve performance
    clCommandQueueWrapper tQueue;
};

struct TestInfo
{
    size_t subBufferSize; // Size of the sub-buffer in elements
    const Func *f; // A pointer to the function info

    // Programs for various vector sizes.
    Programs programs;

    // Thread-specific kernels for each vector size:
    // k[vector_size][thread_id]
    KernelMatrix k;

    // Array of thread specific information
    std::vector<ThreadInfo> tinfo;

    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
    float ulps; // max_allowed ulps
    int ftz; // non-zero if running in flush to zero mode

    int isFDim;
    int skipNanInf;
    int isNextafter;
    bool relaxedMode; // True if test is running in relaxed mode, false
                      // otherwise.
};

// A table of more difficult cases to get right
const double specialValues[] = {
    -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),
    -1000.0,
    -100.0,
    -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),
    +1000.0,
    +100.0,
    +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,
};

constexpr size_t specialValuesCount =
    sizeof(specialValues) / sizeof(specialValues[0]);

cl_int Test(cl_uint job_id, cl_uint thread_id, void *data)
{
    TestInfo *job = (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]);
    float ulps = job->ulps;
    dptr func = job->f->dfunc;
    int ftz = job->ftz;
    bool relaxedMode = job->relaxedMode;
    MTdata d = tinfo->d;
    cl_int error;
    const char *name = job->f->name;

    int isNextafter = job->isNextafter;
    cl_ulong *t;
    cl_double *r;
    cl_double *s;
    cl_double *s2;
    cl_int copysign_test = 0;

    Force64BitFPUPrecision();

    cl_event e[VECTOR_SIZE_COUNT];
    cl_ulong *out[VECTOR_SIZE_COUNT];
    if (gHostFill)
    {
        // start the map of the output arrays
        for (auto j = gMinVectorSizeIndex; j < gMaxVectorSizeIndex; j++)
        {
            out[j] = (cl_ulong *)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
    cl_ulong *p = (cl_ulong *)gIn + thread_id * buffer_elements;
    cl_ulong *p2 = (cl_ulong *)gIn2 + thread_id * buffer_elements;
    cl_uint idx = 0;
    int totalSpecialValueCount = specialValuesCount * specialValuesCount;
    int lastSpecialJobIndex = (totalSpecialValueCount - 1) / buffer_elements;

    // Test edge cases
    if (job_id <= (cl_uint)lastSpecialJobIndex)
    {
        cl_double *fp = (cl_double *)p;
        cl_double *fp2 = (cl_double *)p2;
        uint32_t x, y;

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

        for (; idx < buffer_elements; idx++)
        {
            fp[idx] = specialValues[x];
            fp2[idx] = specialValues[y];
            if (++x >= specialValuesCount)
            {
                x = 0;
                y++;
                if (y >= specialValuesCount) break;
            }
        }
    }

    // Init any remaining values
    for (; idx < buffer_elements; idx++)
    {
        p[idx] = genrand_int64(d);
        p2[idx] = 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);
        return error;
    }

    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);
        return error;
    }

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

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

        // 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");
            return error;
        }
    }

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

    if (gSkipCorrectnessTesting) return CL_SUCCESS;

    if (!strcmp(name, "copysign")) copysign_test = 1;

#define ref_func(s, s2) (copysign_test ? func.f_ff_d(s, s2) : func.f_ff(s, s2))

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

    // Read the data back -- no need to wait for the first N-1 buffers but wait
    // for the last buffer. This is an in order queue.
    for (auto j = gMinVectorSizeIndex; j < gMaxVectorSizeIndex; j++)
    {
        cl_bool blocking = (j + 1 < gMaxVectorSizeIndex) ? CL_FALSE : CL_TRUE;
        out[j] = (cl_ulong *)clEnqueueMapBuffer(
            tinfo->tQueue, tinfo->outBuf[j], blocking, 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);
            return error;
        }
    }

    // Verify data
    t = (cl_ulong *)r;
    for (size_t j = 0; j < buffer_elements; j++)
    {
        for (auto k = gMinVectorSizeIndex; k < gMaxVectorSizeIndex; k++)
        {
            cl_ulong *q = out[k];

            // If we aren't getting the correctly rounded result
            if (t[j] != q[j])
            {
                cl_double test = ((cl_double *)q)[j];
                long double correct = ref_func(s[j], s2[j]);
                float err = Bruteforce_Ulp_Error_Double(test, correct);
                int fail = !(fabsf(err) <= ulps);

                if (fail && (ftz || relaxedMode))
                {
                    // retry per section 6.5.3.2
                    if (IsDoubleResultSubnormal(correct, ulps))
                    {
                        fail = fail && (test != 0.0f);
                        if (!fail) err = 0.0f;
                    }

                    // nextafter on FTZ platforms may return the smallest
                    // normal float (2^-126) given a denormal or a zero
                    // as the first argument. The rationale here is that
                    // nextafter flushes the argument to zero and then
                    // returns the next representable number in the
                    // direction of the second argument, and since
                    // denorms are considered as zero, the smallest
                    // normal number is the next representable number.
                    // In which case, it should have the same sign as the
                    // second argument.
                    if (isNextafter)
                    {
                        if (IsDoubleSubnormal(s[j]) || s[j] == 0.0f)
                        {
                            cl_double value = copysign(twoToMinus1022, s2[j]);
                            fail = fail && (test != value);
                            if (!fail) err = 0.0f;
                        }
                    }
                    else
                    {
                        // retry per section 6.5.3.3
                        if (IsDoubleSubnormal(s[j]))
                        {
                            long double correct2 = ref_func(0.0, s2[j]);
                            long double correct3 = ref_func(-0.0, s2[j]);
                            float err2 =
                                Bruteforce_Ulp_Error_Double(test, correct2);
                            float err3 =
                                Bruteforce_Ulp_Error_Double(test, correct3);
                            fail = fail
                                && ((!(fabsf(err2) <= ulps))
                                    && (!(fabsf(err3) <= ulps)));
                            if (fabsf(err2) < fabsf(err)) err = err2;
                            if (fabsf(err3) < fabsf(err)) err = err3;

                            // retry per section 6.5.3.4
                            if (IsDoubleResultSubnormal(correct2, ulps)
                                || IsDoubleResultSubnormal(correct3, ulps))
                            {
                                fail = fail && (test != 0.0f);
                                if (!fail) err = 0.0f;
                            }

                            // try with both args as zero
                            if (IsDoubleSubnormal(s2[j]))
                            {
                                correct2 = ref_func(0.0, 0.0);
                                correct3 = ref_func(-0.0, 0.0);
                                long double correct4 = ref_func(0.0, -0.0);
                                long double correct5 = ref_func(-0.0, -0.0);
                                err2 =
                                    Bruteforce_Ulp_Error_Double(test, correct2);
                                err3 =
                                    Bruteforce_Ulp_Error_Double(test, correct3);
                                float err4 =
                                    Bruteforce_Ulp_Error_Double(test, correct4);
                                float err5 =
                                    Bruteforce_Ulp_Error_Double(test, correct5);
                                fail = fail
                                    && ((!(fabsf(err2) <= ulps))
                                        && (!(fabsf(err3) <= ulps))
                                        && (!(fabsf(err4) <= ulps))
                                        && (!(fabsf(err5) <= ulps)));
                                if (fabsf(err2) < fabsf(err)) err = err2;
                                if (fabsf(err3) < fabsf(err)) err = err3;
                                if (fabsf(err4) < fabsf(err)) err = err4;
                                if (fabsf(err5) < fabsf(err)) err = err5;

                                // retry per section 6.5.3.4
                                if (IsDoubleResultSubnormal(correct2, ulps)
                                    || IsDoubleResultSubnormal(correct3, ulps)
                                    || IsDoubleResultSubnormal(correct4, ulps)
                                    || IsDoubleResultSubnormal(correct5, ulps))
                                {
                                    fail = fail && (test != 0.0f);
                                    if (!fail) err = 0.0f;
                                }
                            }
                        }
                        else if (IsDoubleSubnormal(s2[j]))
                        {
                            long double correct2 = ref_func(s[j], 0.0);
                            long double correct3 = ref_func(s[j], -0.0);
                            float err2 =
                                Bruteforce_Ulp_Error_Double(test, correct2);
                            float err3 =
                                Bruteforce_Ulp_Error_Double(test, correct3);
                            fail = fail
                                && ((!(fabsf(err2) <= ulps))
                                    && (!(fabsf(err3) <= ulps)));
                            if (fabsf(err2) < fabsf(err)) err = err2;
                            if (fabsf(err3) < fabsf(err)) err = err3;

                            // retry per section 6.5.3.4
                            if (IsDoubleResultSubnormal(correct2, ulps)
                                || IsDoubleResultSubnormal(correct3, ulps))
                            {
                                fail = fail && (test != 0.0f);
                                if (!fail) err = 0.0f;
                            }
                        }
                    }
                }

                if (fabsf(err) > tinfo->maxError)
                {
                    tinfo->maxError = fabsf(err);
                    tinfo->maxErrorValue = s[j];
                    tinfo->maxErrorValue2 = s2[j];
                }
                if (fail)
                {
                    vlog_error("\nERROR: %s%s: %f ulp error at {%.13la, "
                               "%.13la}: *%.13la vs. %.13la\n",
                               name, sizeNames[k], err, s[j], s2[j], r[j],
                               test);
                    return -1;
                }
            }
        }
    }

    for (auto 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:%10zu ulps:%5.3f "
                 "ThreadCount:%2u\n",
                 base, job->step, job->scale, buffer_elements, job->ulps,
                 job->threadCount);
        }
        else
        {
            vlog(".");
        }
        fflush(stdout);
    }

    return CL_SUCCESS;
}

} // anonymous namespace

int TestFunc_Double_Double_Double(const Func *f, MTdata d, bool relaxedMode)
{
    TestInfo test_info{};
    cl_int error;
    float maxError = 0.0f;
    double maxErrorVal = 0.0;
    double maxErrorVal2 = 0.0;

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

    // Init 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));

    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.ulps = f->double_ulps;
    test_info.ftz = f->ftz || gForceFTZ;
    test_info.relaxedMode = relaxedMode;

    test_info.isFDim = 0 == strcmp("fdim", f->nameInCode);
    test_info.skipNanInf = 0;
    test_info.isNextafter = 0 == strcmp("nextafter", f->nameInCode);

    test_info.tinfo.resize(test_info.threadCount);
    for (cl_uint 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);
            return error;
        }
        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);
            return error;
        }

        for (auto 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 "
                           "gOutBuffer[%d] for region {%zd, %zd}\n",
                           (int)j, region.origin, region.size);
                return error;
            }
        }
        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);
            return error;
        }

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

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

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

        // Accumulate the arithmetic errors
        for (cl_uint i = 0; i < test_info.threadCount; i++)
        {
            if (test_info.tinfo[i].maxError > maxError)
            {
                maxError = test_info.tinfo[i].maxError;
                maxErrorVal = test_info.tinfo[i].maxErrorValue;
                maxErrorVal2 = test_info.tinfo[i].maxErrorValue2;
            }
        }

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

        vlog("\t%8.2f @ {%a, %a}", maxError, maxErrorVal, maxErrorVal2);
    }

    vlog("\n");

    return CL_SUCCESS;
}
