Date: Wed, 29 Apr 2026 16:04:11 +0000 From: bugzilla-noreply@freebsd.org To: standards@FreeBSD.org Subject: [Bug 294719] lib/msun: Added fmaximum_mag_num Message-ID: <bug-294719-99-sFuz4ulNsZ@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-294719-99@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294719 Steve Kargl <kargl@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Attachment #270243|text/x-csrc |text/plain mime type| | --- Comment #10 from Steve Kargl <kargl@FreeBSD.org> --- Created attachment 270243 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=270243&action=edit bit-twiddling implementation and test program (In reply to Robert Clausecker from comment #9) I thought I replies yesterday. Anyway, here's the bit twiddling for fmaxium_numf(). AFAICT, it meets the 'make it work. make it correct.' criteria. A full self-contained test code, which works on x86_64, is attached as h4.c. /* * Return the number if one argument is a number and the other is * a qNaN or sNaN. If both arguments are NaNs, a quiet NaN is returned. * If an argument is a sNaN, the "invalid" floating-point exception * is raised (even though the function returns the number when the other * argument is a number. */ float fmaximum_numf(float x, float y) { uint32_t hx, hy, ux, uy; GET_FLOAT_WORD(hx, x); ux = hx & 0x7fffffff; GET_FLOAT_WORD(hy, y); uy = hy & 0x7fffffff; if (ux > 0x7f800000) { /* x is NaN. */ if (uy > 0x7f800000) /* y is NaN. */ return (x + y); /* Return qNaN, raise FE_INVALID. */ if (ux < 0x7fc00000) /* x is sNaN. */ feraiseexcept(FE_INVALID); return (y); } if (uy > 0x7f800000) { /* y is NaN */ if (uy < 0x7fc00000) /* y is sNaN */ feraiseexcept(FE_INVALID); return (x); } return (((hx >> 31) < (hy >> 31)) || y < x ? x : y); } -- You are receiving this mail because: You are the assignee for the bug.home | help
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