These questions have to do with floating point exceptions. If you get some strange non-numeric output where you're expecting a number, you've either exceeded the finite limits of floating point arithmetic or you
To handle floating-point exceptions, refer to the sample code in the _fpieee_flt topic. Floating-point precision of intermediate values are controlled by the functions _control87, _controlfp, __control87_2. By default,_controlfp'sprecision control is set to 53 bits (_PC_53). Linking with...
int jmpret; /* Unmask all floating-point exceptions. */ _control87( 0, _MCW_EM ); /* Set up floating-point error handler. The compiler * will generate a warning because it expects * signal-handling functions to take only one argument. */ if( signal( SIGFPE, fphandler ) == SIG_ER...
Theieee_retrospectivefunction queries the floating-point status registers to find out which exceptions have accrued and a message is printed to standarderror to inform you which exceptions were raised but not cleared. The message typically looks like this; the format may vary with each compiler rele...
/* Unmask all floating-point exceptions. */ _control87( 0, _MCW_EM ); /* Set up floating-point error handler. The compiler * will generate a warning because it expects * signal-handling functions to take only one argument. */
TABLE 4-1 IEEE Floating Point Exceptions IEEE Exception Reason Why This Arises Example Default Result When Trap is Disabled Invalid operation An operand is invalid for the operation about to be performed. (On x86, this exception is also raised when the floating point stack underflows...
fegetenvandfesetenv: In Visual Studio 2013, these functions were incorrectly implemented in the CRT for x86. There were two bugs: [1] a call tofegetenvwould cause any pending, unmasked x87 floating point exceptions to be raised, and [2] thefegetenvfunction would mask all x87 flo...
Enable Floating Point ExceptionsReliable floating-point exception model. Exceptions will be raised immediately after they're triggered. Sets /fp:except.Create Hotpatchable ImageWhen hotpatching is on, the compiler ensures that first instruction of each function is two bytes, as required for hot ...
Compiler error C3198invalid use of floating-point pragmas: fenv_access pragma operates only in precise mode Compiler error C3199invalid use of floating-point pragmas: exceptions are not supported in non-precise mode See also C/C++ Compiler and build tools errors and warnings ...
Fix floating point 'g' format output in tinystdio. (e.g., for 10.0, print '10' instead of '1e+01'). There are tests which verify a range of 'g' cases like these now. Merge current newlib bits. The only thing which affects picolibc is the addition of fenv support for arm. ...