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* random: Add Randomizer::nextFloat() * random: Check that doubles are IEEE-754 in Randomizer::nextFloat() * random: Add Randomizer::nextFloat() tests * random: Add Randomizer::getFloat() implementing the y-section algorithm The algorithm is published in: Drawing Random Floating-Point Numbers from an Interval. Frédéric Goualard, ACM Trans. Model. Comput. Simul., 32:3, 2022. https://doi.org/10.1145/3503512 * random: Implement getFloat_gamma() optimization see https://github.com/php/php-src/pull/9679/files#r994668327 * random: Add Random\IntervalBoundary * random: Split the implementation of γ-section into its own file * random: Add tests for Randomizer::getFloat() * random: Fix γ-section for 32-bit systems * random: Replace check for __STDC_IEC_559__ by compile-time check for DBL_MANT_DIG * random: Drop nextFloat_spacing.phpt * random: Optimize Randomizer::getFloat() implementation * random: Reject non-finite parameters in Randomizer::getFloat() * random: Add NEWS/UPGRADING for Randomizer’s float functionality