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--- Comment #18 from Ilija Kocho <[email protected]> 2012-03-22 11:01:07 GMT --- (In reply to comment #12) > (In comment #9 I wrote) > > > All f-tests fail on eCos synthetic target > > My fault (that was wrong grep GDB output)! I'm sorry. Only below fails: > > FAIL:<sqrtf() failed tests> Line: 92, File: tests/vectors/sqrtf.c > FAIL:<log10f() failed tests> Line: 92, File: tests/vectors/log10f.c > FAIL:<frexpf() failed tests> Line: 92, File: tests/vectors/frexpf.c > FAIL:<acosf() failed tests> Line: 92, File: tests/vectors/acosf.c > FAIL:<asinf() failed tests> Line: 92, File: tests/vectors/asinf.c > FAIL:<logf() failed tests> Line: 92, File: tests/vectors/logf.c > > So, I got the same results for eCos sythetic target as for ARM7 target. > > Sergei Tests expect NaN for out-of-domain arguments, but functions return something else. For instance asinf(10) returns 0. Here is a little example: int main(void) { volatile float fla, flb, flc; volatile double dla, dlb, dlc; printf("Enter floats: "); scanf("%f %f", &fla, &flb); printf("Enter doubles: "); scanf ("%lf %lf", &dla, &dlb); flc = fla + flb; dlc = dla + dlb; printf("float: %f + %f = %f\n", fla, flb, flc); printf("double: %f + %f = %f\n", dla, dlb, dlc); flc = fla / flb; dlc = dla / dlb; printf("float: %f / %f = %f\n", fla, flb, flc); printf("double: %f / %f = %f\n", dla, dlb, dlc); flc = asinf(fla); dlc = asin(dla); printf("float: asinf(%f) = %f\n", fla, flc); printf("double: asin(%f) = %f\n", dla, dlc); return 0; } And some printouts: Enter floats: 0 0 Enter doubles: 0 0 float: 0.000000 + 0.000000 = 0.000000 double: 0.000000 + 0.000000 = 0.000000 float: 0.000000 / 0.000000 = nan double: 0.000000 / 0.000000 = nan float: asinf(0.000000) = 0.000000 double: asin(0.000000) = 0.000000 Enter floats: 10 10 Enter doubles: 10 10 float: 10.000000 + 10.000000 = 20.000000 double: 10.000000 + 10.000000 = 20.000000 float: 10.000000 / 10.000000 = 1.000000 double: 10.000000 / 10.000000 = 1.000000 float: asinf(10.000000) = 0.000000 double: asin(10.000000) = 0.000000 As we can the same behavior is for double. I haven't check but I could imagine that double's tests either don't contain these cases or expect 0. I wander if this is some compatibility issue?! FYI Linux man pages say they should return NaN. Then next question: what to fix, functions or tests? Ilija -- Configure bugmail: http://bugs.ecos.sourceware.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
