--- /dev/null
+#include <cmath>
+#include <cstring>
+#include "utest_helper.hpp"
+
+void builtin_modf(void)
+{
+ const int n = 32;
+ float src[n];
+
+ // Setup kernel and buffers
+ OCL_CREATE_KERNEL("builtin_modf");
+ OCL_CREATE_BUFFER(buf[0], 0, n * sizeof(float), NULL);
+ OCL_CREATE_BUFFER(buf[1], 0, n * sizeof(float), NULL);
+ OCL_CREATE_BUFFER(buf[2], 0, n * sizeof(float), NULL);
+ OCL_SET_ARG(0, sizeof(cl_mem), &buf[0]);
+ OCL_SET_ARG(1, sizeof(cl_mem), &buf[1]);
+ OCL_SET_ARG(2, sizeof(cl_mem), &buf[2]);
+ globals[0] = n;
+ locals[0] = 16;
+
+ src[0] = INFINITY;
+ src[1] = -INFINITY;
+ src[2] = nanf("");
+ src[3] = 0;
+ src[4] = 1.5f;
+ src[5] = 2.5f;
+ src[6] = -2.5f;
+ src[7] = 20;
+ src[8] = 21;
+ src[9] = 89.5f;
+
+ OCL_MAP_BUFFER(0);
+ memcpy(buf_data[0], src, n * sizeof(float));
+ OCL_UNMAP_BUFFER(0);
+
+ OCL_NDRANGE(1);
+
+ OCL_MAP_BUFFER(1);
+ OCL_MAP_BUFFER(2);
+ float *dst = (float *)buf_data[1];
+ float *it = (float *)buf_data[2];
+ OCL_ASSERT(dst[0] == 0 && it[0] == INFINITY);
+ OCL_ASSERT(dst[1] == -0.f && it[1] == -INFINITY);
+ OCL_ASSERT(isnanf(dst[2]) && isnanf(it[2]));
+ OCL_ASSERT(dst[3] == 0 && it[3] == 0);
+ OCL_ASSERT(dst[4] == 0.5f && it[4] == 1);
+ OCL_ASSERT(dst[5] == 0.5f && it[5] == 2);
+ OCL_ASSERT(dst[6] == -0.5f && it[6] == -2);
+ OCL_ASSERT(dst[7] == 0 && it[7] == 20);
+ OCL_ASSERT(dst[8] == 0 && it[8] == 21);
+ OCL_ASSERT(dst[9] == 0.5f && it[9] == 89);
+ OCL_UNMAP_BUFFER(1);
+ OCL_UNMAP_BUFFER(2);
+}
+
+MAKE_UTEST_FROM_FUNCTION(builtin_modf);