flyingfish89 opened a new pull request, #7848:
URL: https://github.com/apache/nuttx/pull/7848
## Summary
function:
scalbnf:get a float number of x*2^n
scalbn :get a double number
scalbnl:get a long double number
The implementation of the function borrows from musl
## Impact
## Testing
long double number = scalbnl(2, 10);
printf("%LF\n", number);
number = scalbnl(3, 100000);
printf("%LF\n", number);
number = scalbnl(4, 100);
printf("%LF\n", number);
number = scalbnl(5, 1000);
printf("%LF\n", number);
number = scalbnl(12, 10000000);
printf("%LF\n", number);
number = scalbnl(22, 1090000);
printf("%LF\n", number);
number = scalbnl(2075, 10867564);
printf("%LF\n", number);
number = scalbnl(265, -108766);
printf("%LF\n", number);
number = scalbnl(22, -1320);
printf("%LF\n", number);
float number1 = scalbnf(2, 10);
printf("%f\n", number1);
number1 = scalbnl(3, 100000);
printf("%f\n", number1);
number = scalbnl(4, 100);
printf("%f\n", number1);
number = scalbnl(5, 1000);
printf("%f\n", number1);
number = scalbnl(12, -10000000);
printf("%f\n", number1);
number = scalbnl(22, 1090000);
printf("%f\n", number1);
number = scalbnl(2075, 10867564);
printf("%f\n", number1);
number = scalbnl(265, -108766);
printf("%f\n", number1);
number = scalbnl(22, -1320);
printf("%f\n", number1);
double number2 = scalbn(2, 10);
printf("%f\n", number2);
number2 = scalbn(3, 100000);
printf("%f\n", number2);
number2 = scalbn(4, 100);
printf("%f\n", number2);
number2 = scalbn(5, 1000);
printf("%f\n", number2);
number2 = scalbn(12, -10000000);
printf("%f\n", number2);
number2 = scalbn(22, 1090000);
printf("%f\n", number2);
number2 = scalbn(2075, 10867564);
printf("%f\n", number2);
number2 = scalbn(265, -108766);
printf("%f\n", number2);
number2 = scalbn(22, -1320);
printf("%f\n", number2);
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