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author | 2017-05-02 17:51:53 +0200 | |
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committer | 2017-05-02 17:51:53 +0200 | |
commit | 3102ec9ce009d0f28355c5b7df9c5bd5013e6e75 (patch) | |
tree | 80a1ea19ff06cc9308b236a0d8d6358d21dd0381 /CAN-binder/libs/nanopb/examples/using_double_on_avr/test_conversions.c | |
parent | 12e680a3c97a2750c657a8c561a79706f3689149 (diff) | |
parent | 278ffb890e3d8722e4c7d824baaf221a1e375fc4 (diff) |
Add 'CAN-binder/libs/nanopb/' from commit '278ffb890e3d8722e4c7d824baaf221a1e375fc4'
git-subtree-dir: CAN-binder/libs/nanopb
git-subtree-mainline: 12e680a3c97a2750c657a8c561a79706f3689149
git-subtree-split: 278ffb890e3d8722e4c7d824baaf221a1e375fc4
Diffstat (limited to 'CAN-binder/libs/nanopb/examples/using_double_on_avr/test_conversions.c')
-rw-r--r-- | CAN-binder/libs/nanopb/examples/using_double_on_avr/test_conversions.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/CAN-binder/libs/nanopb/examples/using_double_on_avr/test_conversions.c b/CAN-binder/libs/nanopb/examples/using_double_on_avr/test_conversions.c new file mode 100644 index 00000000..22620a6a --- /dev/null +++ b/CAN-binder/libs/nanopb/examples/using_double_on_avr/test_conversions.c @@ -0,0 +1,56 @@ +#include "double_conversion.h" +#include <math.h> +#include <stdio.h> + +static const double testvalues[] = { + 0.0, -0.0, 0.1, -0.1, + M_PI, -M_PI, 123456.789, -123456.789, + INFINITY, -INFINITY, NAN, INFINITY - INFINITY, + 1e38, -1e38, 1e39, -1e39, + 1e-38, -1e-38, 1e-39, -1e-39, + 3.14159e-37,-3.14159e-37, 3.14159e-43, -3.14159e-43, + 1e-60, -1e-60, 1e-45, -1e-45, + 0.99999999999999, -0.99999999999999, 127.999999999999, -127.999999999999 +}; + +#define TESTVALUES_COUNT (sizeof(testvalues)/sizeof(testvalues[0])) + +int main() +{ + int status = 0; + int i; + for (i = 0; i < TESTVALUES_COUNT; i++) + { + double orig = testvalues[i]; + float expected_float = (float)orig; + double expected_double = (double)expected_float; + + float got_float = double_to_float(*(uint64_t*)&orig); + uint64_t got_double = float_to_double(got_float); + + uint32_t e1 = *(uint32_t*)&expected_float; + uint32_t g1 = *(uint32_t*)&got_float; + uint64_t e2 = *(uint64_t*)&expected_double; + uint64_t g2 = got_double; + + if (g1 != e1) + { + printf("%3d double_to_float fail: %08x != %08x\n", i, g1, e1); + status = 1; + } + + if (g2 != e2) + { + printf("%3d float_to_double fail: %016llx != %016llx\n", i, + (unsigned long long)g2, + (unsigned long long)e2); + status = 1; + } + } + + return status; +} + + + + |