Fork#41597: std::remquo does not yield the proper result for the quotient
Open Date: 2021-02-17 23:25
Last Update: 2021-02-22 15:19
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/41597
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Last Changes/Comment on this Ticket:
2021-02-22 15:19 Updated by: yaser_elkelany
Comment:
Good best
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Ticket Status:
Reporter: avhaecke
Owner: keith
Type: Issues
Status: Open [Owner assigned]
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: None
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Ticket details:
Context :
This problem was encountered with gcc on MinGW in the following version :
gcc.exe (MinGW.org GCC-6.3.0-1) 6.3.0
Description :
The following code :
double numer = 90.1 ; double denom = 90 .0 ; int quot ; double result = std::remquo(numer, denom, ") ; std::cout << "result " << result << std::endl ; std::cout << "quot " << quot << std::endl;should yield :
result 0.1
quot 1
As is expected from std::remquo, quot has a magnitude which should be congruent (modulo 2 to the nth) to the magnitude of the integral quotient of x/y, n being greater or equal than 3.
However with gcc 6.3.0, on MinGW, the above instructions yield :
result 0.1
quot 0
On another version of gcc (gcc 4.9.1 2014), the expected behavior is encountered.
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