Add test cases generator.

    v1:
    File utest_generator.py contain the base class and function for generating
    File utest_math_gen.py can generate most math function for all the gentype
    utest_math_gen.py can be run during cmake.

    v2:
    1. Put all the generated unit test cases to folder utest/generated.
    2. Delete all generated folder while involve make clean.
    3. At the top of the generated test cases, add some comments
    4. Instead of defined FLT_ULP(0.000001) as the ulp unit, caculate the float ulp before using it.
    5. Add several math functions' test case.

    v3:
    1. Refine the calculation for float, and calculate each float got from cpu function.

    v4:
    Refine the calculation for float.

    Following fucntions test cases fail with input 0, 1 or 3.14:
	builtin_atan2_float
	builtin_atanh_float
	builtin_rootn_float
    builtin_cos_float
    builtin_cospi_float
    builtin_erf_float
    builtin_erfc_float
    builtin_mad_float
    builtin_nextafter_float
    builtin_pown_float
    builtin_powr_float
    builtin_rint_float
    builtin_sinpi_float
    builtin_tan_float
    builtin_tanpi_float

    v5:
    remove case builtin_mad_float

	todo:
	atan2pi
	fmax
	fmin
	sincos

Signed-off-by: Yi Sun <yi.sun@intel.com>
Signed-off-by: Yangwei Shui <yangweix.shui@intel.com>
Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>
Reviewed-by: "Song, Ruiling" <ruiling.song@intel.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/utests/utest_helper.cpp b/utests/utest_helper.cpp
index b264c1b4..a7385997 100644
--- a/utests/utest_helper.cpp
+++ b/utests/utest_helper.cpp
@@ -648,3 +648,33 @@ int cl_check_image(const int *img, int w, int h, const char *bmp)
   return (float(discrepancy) / float(n) > max_error_ratio) ? 0 : 1;
 }
 
+typedef struct
+{
+  unsigned int mantissa:23;
+  unsigned int exponent:8;
+  unsigned int sign:1;
+} FLOAT;
+
+typedef union
+{
+  float f;
+  unsigned int i;
+  FLOAT spliter;
+} SF;
+
+const float cl_FLT_ULP(float float_number)
+{
+  SF floatBin, ulpBin;
+  floatBin.f = float_number;
+
+  ulpBin.spliter.sign = floatBin.spliter.sign;
+  ulpBin.spliter.exponent = floatBin.spliter.exponent;
+  ulpBin.spliter.mantissa = 0x1;
+  
+  return ulpBin.f;
+}
+
+const int cl_INT_ULP(int int_number)
+{
+  return 0;
+}