define with-float-traps-masked and tests

[kpoeck]

• define finally with-float-traps-masked for clasp
• added tests
• tested in ecl, ccl, clasp and sbcl

[Shinmera]

The actual Clasp support seems fine aside from a question I have, but the test suite is unfortunately not suitable for inclusion as it is. The tests are indeterministic, and the names are not self-explanatory.

[kpoeck]

I hope I have now applied all your comments, apart from :denormalized-operand.

Clasp supports setting the flag for :denormalized-operand, see https://github.com/clasp-developers/clasp/blob/dev/src/gctools/interrupt.cc#L264

But the possible codes for sigfpe are defined in the headers like this:

#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
#define FPE_NOOP        0       /* if only I knew... */
#endif
#define FPE_FLTDIV      1       /* [XSI] floating point divide by zero */
#define FPE_FLTOVF      2       /* [XSI] floating point overflow */
#define FPE_FLTUND      3       /* [XSI] floating point underflow */
#define FPE_FLTRES      4       /* [XSI] floating point inexact result */
#define FPE_FLTINV      5       /* [XSI] invalid floating point operation */
#define FPE_FLTSUB      6       /* [XSI] subscript out of range -NOTIMP */
#define FPE_INTDIV      7       /* [XSI] integer divide by zero */
#define FPE_INTOVF      8       /* [XSI] integer overflow */

Since here I could not find :denormalized operand the sigfpe handler in clasp will never raise an exception corresponding to :denormalized-operand

[kpoeck]

Here the test-log for ecl, sbcl, ccl and clasp:
float-features-test-log.txt

FLOAT-FEATURES-TESTS::FLOAT-FEATURES-INVALID-TRAPPED fails in ecl. If in the same session I execute the tests again, all tests work

[Shinmera]

Looks good, thanks a lot!

[kpoeck]

great!