67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/*
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* Copyright (c) 2014 Travis Geiselbrecht
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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#include <stdint.h>
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union double_int {
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double d;
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uint64_t i;
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};
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static const union double_int float_test_vec[] = {
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{ .d = -2.0 },
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{ .d = -1.0 },
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{ .d = -0.5 },
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{ .d = -0.0 },
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{ .d = 0.0 },
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{ .d = 0.01 },
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{ .d = 0.1 },
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{ .d = 0.2 },
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{ .d = 0.25 },
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{ .d = 0.5 },
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{ .d = 0.75 },
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{ .d = 1.0 },
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{ .d = 2.0 },
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{ .d = 3.0 },
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{ .d = 10.0 },
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{ .d = 100.0 },
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{ .d = 123456.0 },
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{ .d = -123456.0 },
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{ .d = 546.5645644531f },
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{ .d = -546.5645644531f },
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{ .d = 0.12345 },
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{ .d = 0.0000012345 },
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{ .d = 0.0000019999 },
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{ .d = 0.0000015 },
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{ .i = 0x4005bf0a8b145649ULL }, // e
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{ .i = 0x400921fb54442d18ULL }, // pi
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{ .i = 0x43f0000000000000ULL }, // 2^64
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{ .i = 0x7fefffffffffffffULL }, // largest normalized
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{ .i = 0x0010000000000000ULL }, // least positive normalized
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{ .i = 0x0000000000000001ULL }, // smallest possible denorm
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{ .i = 0x000fffffffffffffULL }, // largest possible denorm
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{ .i = 0x7ff0000000000001ULL }, // smallest SNAn
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{ .i = 0x7ff7ffffffffffffULL }, // largest SNAn
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{ .i = 0x7ff8000000000000ULL }, // smallest QNAn
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{ .i = 0x7fffffffffffffffULL }, // largest QNAn
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{ .i = 0xfff0000000000000ULL }, // -infinity
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{ .i = 0x7ff0000000000000ULL }, // +infinity
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};
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#define countof(a) (sizeof(a) / sizeof((a)[0]))
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__attribute__((unused)) static const unsigned int float_test_vec_size = countof(float_test_vec);
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#define PRINT_FLOAT \
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printf("0x%016llx %f %F %a %A\n", \
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float_test_vec[i], \
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*(const double *)&float_test_vec[i], \
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*(const double *)&float_test_vec[i], \
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*(const double *)&float_test_vec[i], \
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*(const double *)&float_test_vec[i])
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