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Test printf - set more precisely printing floating point numbers (#2299)

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We noticed such issue 
expected: ^(K{C, -30304.8, -22634.574219, 24476.882812, E4929EC2,
1467582223, 96vL.+
got: ^(K{C, -30304.8, -22634.574219, 24476.882813, E4929EC2, 1467582223,
96vL.+
The input value is 24476.882812 and cannot be precisely represented as a
single-floating point, so compilers are allowed to round it to the
nearest representable value. In this case, the closest representable
value to 24476.882812 is 24476.8828125, which rounds to 24476.882813.
Even some versions of MSVC prints that value as 24476.882813 and some
24476.882812 : https://godbolt.org/z/5GhEf8KPT
The proposal is to set precisely how many number should be displayed to
avoid rounding.
This commit is contained in:
Grzegorz Wawiorko
2025-04-01 18:52:19 +02:00
committed by GitHub
parent 4e00778b93
commit a429ce771e
1 changed files with 1 additions and 1 deletions
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2
test_conformance/printf/test_printf.cpp
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@@ -247,7 +247,7 @@ cl_program makeMixedFormatPrintfProgram(cl_kernel* kernel_ptr,
}; };
std::array<std::vector<std::string>, 2> formats = { std::array<std::vector<std::string>, 2> formats = {
{ { "%f", "%e", "%g", "%.13a", "%F", "%E", "%G", "%.13A" }, { { "%.13f", "%e", "%g", "%.13a", "%.13F", "%E", "%G", "%.13A" },
{ "%d", "%i", "%u", "%x", "%o", "%X" } } { "%d", "%i", "%u", "%x", "%o", "%X" } }
}; };
std::vector<char> data_before(2 + genrand_int32(gMTdata) % 8); std::vector<char> data_before(2 + genrand_int32(gMTdata) % 8);