wireguard-openbsd/lib/libm/src/s_lrintf.c, branch jd/simplify-queueing WireGuard implementation for the OpenBSD kernel https://git.zx2c4.com/wireguard-openbsd/atom/lib/libm/src/s_lrintf.c?h=jd%2Fsimplify-queueing 2016-09-12T19:47:01Z Reduce libm's exports and make internal calls go direct. 2016-09-12T19:47:01Z guenther guenther@openbsd.org 2016-09-12T19:47:01Z urn:sha1:2f2c00629eff6a304ebffb255fc56f4fa7a1833b All dependencies on libc are now via reserved/standardized names. ok kettenis@ millert@ deraadt@ Trick GCC optimizer into clipping any extra precision by making w 2011-04-20T21:32:59Z martynas martynas@openbsd.org 2011-04-20T21:32:59Z urn:sha1:deba65a8db4698a175710b6d96f19c86298aa36e volatile; a similar hack was already being used in lrintf(). This will make rint and {,l}lrint family functions actually work; i.e. on m68k rintf(8.6F) was 8.625. The {,l}lround{,f} implementations are based on {,l}lrint{,f}, 2011-04-17T13:59:54Z martynas martynas@openbsd.org 2011-04-17T13:59:54Z urn:sha1:d37b90348eaddca97fc8cbeb99fcf38a0727c60a therefore affected by the same bugs I've fixed a week ago. The high part was being clipped for all exponents greater or equal to 52. Fix this to use RESTYPE_BITS instead; also make the code consistent. The {,l}lrint{,f} functions avoid to shift results by more than 31 2011-04-10T20:42:09Z martynas martynas@openbsd.org 2011-04-10T20:42:09Z urn:sha1:954473c52cf794c060f5a4f37e634c3c79689410 bits, because "behavior is implementation defined in this case". However, this is wrong; behavior is undefined if the right operand is greater than or equal to the width of the promoted left operand. This broke {,l}lrint{,f} (64-bit architectures), and llrint{,f} (32-bit architectures) where results are actually 64-bit values. The high part was clipped for all exponents greater or equal to 52. Fix this to use RESTYPE_BITS instead; {,l}lrint{,f} are now able to pass our regression tests, and I think are right now. The assumption that |1.0 * 2^exp| = 0, exp < -1 cannot be made when 2011-04-10T11:25:14Z martynas martynas@openbsd.org 2011-04-10T11:25:14Z urn:sha1:5d0a19bab04f6f66f09fc506df5075142d84e4cf we round towards -inf or +inf. Move llrint.c, llrintf.c, lrint.c and lrintf.c to s_llrint.c, s_llrintf.c, 2006-09-25T20:25:41Z kettenis kettenis@openbsd.org 2006-09-25T20:25:41Z urn:sha1:d7c6e841056918b4dcf64f738b838ab45abdabb3 s_lrint.c and s_lrintf.c, and add i387-specific assembler versions. ok deraadt@, otto@