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Diffstat (limited to 'tests/test_cl_half.h.c')
| -rw-r--r-- | tests/test_cl_half.h.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/tests/test_cl_half.h.c b/tests/test_cl_half.h.c new file mode 100644 index 0000000..49745e0 --- /dev/null +++ b/tests/test_cl_half.h.c @@ -0,0 +1,126 @@ +// +// Copyright (c) 2020 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 <math.h> +#include <stdio.h> + +#include "CL/cl_half.h" + +union FI { + float f; + uint32_t i; +}; + +int test_half_to_float(cl_half h, cl_float ref) +{ + cl_float f = cl_half_to_float(h); + if (f != ref) { + union FI f_i, ref_i; + f_i.f = f; + ref_i.f = ref; + printf("\nERROR: converting 0x%04x to float: expected 0x%08x, got 0x%08x\n", + h, ref_i.i, f_i.i); + return 0; + } + return 1; +} + +int test_half_from_float(cl_float f, cl_half ref, + cl_half_rounding_mode mode, const char *mode_str) +{ + cl_half h = cl_half_from_float(f, mode); + if (h != ref) { + union FI f_i; + f_i.f = f; + printf( + "\nERROR: converting 0x%08x to half (%s): expected 0x%04x, got 0x%04x\n", + f_i.i, mode_str, ref, h); + return 0; + } + return 1; +} + +int main(void) +{ + printf("\nChecking conversion routines in cl_half.h\n"); + +#define CHECK_TO_FLOAT(h, ref) \ + if (!test_half_to_float(h, ref)) { \ + printf("Test failed on line %d.\n", __LINE__); \ + return 1; \ + } + + // Check a handful of values + CHECK_TO_FLOAT(0x0000, 0.f); + CHECK_TO_FLOAT(0x3c00, 1.f); + CHECK_TO_FLOAT(0xbc00, -1.f); + CHECK_TO_FLOAT(0x7c00, INFINITY); + CHECK_TO_FLOAT(0xfc00, -INFINITY); + + +#define CHECK_FROM_FLOAT(f, ref, mode) \ + if (!test_half_from_float(f, ref, CL_HALF_##mode, #mode)) { \ + printf("Test failed on line %d.\n", __LINE__); \ + return 1; \ + } + + // Check a handful of normal values + CHECK_FROM_FLOAT(0.f, 0x0000, RTE); + CHECK_FROM_FLOAT(1.f, 0x3c00, RTE); + CHECK_FROM_FLOAT(-1.f, 0xbc00, RTE); + CHECK_FROM_FLOAT(CL_HALF_MAX, 0x7bff, RTE); + CHECK_FROM_FLOAT(CL_HALF_MIN, 0x0400, RTE); + + // Check huge positive (non-inf) values round properly + CHECK_FROM_FLOAT(CL_HALF_MAX + 1000.f, 0x7c00, RTE); + CHECK_FROM_FLOAT(CL_HALF_MAX + 1000.f, 0x7c00, RTP); + CHECK_FROM_FLOAT(CL_HALF_MAX + 1000.f, 0x7bff, RTN); + CHECK_FROM_FLOAT(CL_HALF_MAX + 1000.f, 0x7bff, RTZ); + + // Check huge negative (non-inf) values round properly + CHECK_FROM_FLOAT(-(CL_HALF_MAX + 1000.f), 0xfc00, RTE); + CHECK_FROM_FLOAT(-(CL_HALF_MAX + 1000.f), 0xfbff, RTP); + CHECK_FROM_FLOAT(-(CL_HALF_MAX + 1000.f), 0xfc00, RTN); + CHECK_FROM_FLOAT(-(CL_HALF_MAX + 1000.f), 0xfbff, RTZ); +#if 0 // Hexadecimal float constant is C++17 + // Check tiny positive values round properly + CHECK_FROM_FLOAT(0x1.000000p-25, 0x0000, RTE); + CHECK_FROM_FLOAT(0x1.000000p-25, 0x0001, RTP); + CHECK_FROM_FLOAT(0x1.000000p-25, 0x0000, RTN); + CHECK_FROM_FLOAT(0x1.000000p-25, 0x0000, RTZ); + + // Check tiny negative values round properly + CHECK_FROM_FLOAT(-0x1.000000p-25, 0x8000, RTE); + CHECK_FROM_FLOAT(-0x1.000000p-25, 0x8000, RTP); + CHECK_FROM_FLOAT(-0x1.000000p-25, 0x8001, RTN); + CHECK_FROM_FLOAT(-0x1.000000p-25, 0x8000, RTZ); +#else + // Check tiny positive values round properly + CHECK_FROM_FLOAT(2.98023223876953125e-08, 0x0000, RTE); + CHECK_FROM_FLOAT(2.98023223876953125e-08, 0x0001, RTP); + CHECK_FROM_FLOAT(2.98023223876953125e-08, 0x0000, RTN); + CHECK_FROM_FLOAT(2.98023223876953125e-08, 0x0000, RTZ); + + // Check tiny negative values round properly + CHECK_FROM_FLOAT(-2.98023223876953125e-08, 0x8000, RTE); + CHECK_FROM_FLOAT(-2.98023223876953125e-08, 0x8000, RTP); + CHECK_FROM_FLOAT(-2.98023223876953125e-08, 0x8001, RTN); + CHECK_FROM_FLOAT(-2.98023223876953125e-08, 0x8000, RTZ); +#endif + printf("\nAll tests passed!\n"); + + return 0; +} |