qht: Fix threshold rate calculation
tests/qht-bench.c:287:29: error: implicit conversion from 'unsigned long' to 'double' changes value from 18446744073709551615 to 18446744073709551616 [-Werror,-Wimplicit-int-float-conversion] *threshold = rate * UINT64_MAX; ~ ^~~~~~~~~~ Fix this by splitting the 64-bit constant into two halves, each of which is individually perfectly representable, the sum of which produces the correct arithmetic result. This is very likely just a sticking plaster over some underlying incorrect code, but it will suppress the warning for the moment. Cc: Emilio G. Cota <cota@braap.org> Reported-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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@ -284,7 +284,8 @@ static void do_threshold(double rate, uint64_t *threshold)
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if (rate == 1.0) {
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*threshold = UINT64_MAX;
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} else {
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*threshold = rate * UINT64_MAX;
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*threshold = (rate * 0xffff000000000000ull)
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+ (rate * 0x0000ffffffffffffull);
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}
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}
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