diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt --- a/libc/config/linux/x86_64/entrypoints.txt +++ b/libc/config/linux/x86_64/entrypoints.txt @@ -53,6 +53,7 @@ # stdlib.h entrypoints libc.src.stdlib.abs libc.src.stdlib.atoi + libc.src.stdlib.atof libc.src.stdlib.atol libc.src.stdlib.atoll libc.src.stdlib.bsearch @@ -62,6 +63,8 @@ libc.src.stdlib.llabs libc.src.stdlib.lldiv libc.src.stdlib.qsort + libc.src.stdlib.strtod + libc.src.stdlib.strtof libc.src.stdlib.strtol libc.src.stdlib.strtoll libc.src.stdlib.strtoul diff --git a/libc/spec/stdc.td b/libc/spec/stdc.td --- a/libc/spec/stdc.td +++ b/libc/spec/stdc.td @@ -495,6 +495,7 @@ FunctionSpec<"labs", RetValSpec, [ArgSpec]>, FunctionSpec<"llabs", RetValSpec, [ArgSpec]>, + FunctionSpec<"atof", RetValSpec, [ArgSpec]>, FunctionSpec<"atoi", RetValSpec, [ArgSpec]>, FunctionSpec<"atol", RetValSpec, [ArgSpec]>, FunctionSpec<"atoll", RetValSpec, [ArgSpec]>, @@ -505,6 +506,8 @@ FunctionSpec<"qsort", RetValSpec, [ArgSpec, ArgSpec, ArgSpec, ArgSpec]>, + FunctionSpec<"strtod", RetValSpec, [ArgSpec, ArgSpec]>, + FunctionSpec<"strtof", RetValSpec, [ArgSpec, ArgSpec]>, FunctionSpec<"strtol", RetValSpec, [ArgSpec, ArgSpec, ArgSpec]>, FunctionSpec<"strtoll", RetValSpec, [ArgSpec, ArgSpec, ArgSpec]>, FunctionSpec<"strtoul", RetValSpec, [ArgSpec, ArgSpec, ArgSpec]>, diff --git a/libc/src/__support/CMakeLists.txt b/libc/src/__support/CMakeLists.txt --- a/libc/src/__support/CMakeLists.txt +++ b/libc/src/__support/CMakeLists.txt @@ -23,12 +23,14 @@ str_conv_utils HDRS str_conv_utils.h + str_to_float.h DEPENDS .ctype_utils .high_precision_decimal libc.include.errno libc.src.errno.__errno_location libc.utils.CPP.standalone_cpp + libc.src.__support.FPUtil.fputil ) add_header_library( diff --git a/libc/src/__support/detailed_powers_of_ten.h b/libc/src/__support/detailed_powers_of_ten.h new file mode 100644 --- /dev/null +++ b/libc/src/__support/detailed_powers_of_ten.h @@ -0,0 +1,736 @@ +//===-- detailed powers of ten ----------------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef LIBC_SRC_SUPPORT_DETAILED_POWERS_OF_TEN_H +#define LIBC_SRC_SUPPORT_DETAILED_POWERS_OF_TEN_H + +#include + +namespace __llvm_libc { +namespace internal { + +// TODO(michaelrj): write a script that will generate this table. + +// This table was generated by +// https://github.com/google/wuffs/blob/788479dd64f35cb6b4e998a851acb06ee962435b/script/print-mpb-powers-of-10.go +// and contains the 128 bit mantissa approximations of the powers of 10 from +// -348 to 347. The exponents are implied by a linear expression with slope +// 217706.0/65536.0 ≈ log(10)/log(2). This is used by the Eisel-Lemire algorithm +// in str_conv_utils.h. + +constexpr int32_t DETAILED_POWERS_OF_TEN_MIN_EXP_10 = -348; +constexpr int32_t DETAILED_POWERS_OF_TEN_MAX_EXP_10 = 347; + +// This rescales the base 10 exponent by a factor of log(10)/log(2). +static inline int64_t exp10ToExp2(int64_t exp10) { + return (217706 * exp10) >> 16; +} + +static const uint64_t DETAILED_POWERS_OF_TEN[696][2] = { + {0x1732C869CD60E453, 0xFA8FD5A0081C0288}, // 1e-348 + {0x0E7FBD42205C8EB4, 0x9C99E58405118195}, // 1e-347 + {0x521FAC92A873B261, 0xC3C05EE50655E1FA}, // 1e-346 + {0xE6A797B752909EF9, 0xF4B0769E47EB5A78}, // 1e-345 + {0x9028BED2939A635C, 0x98EE4A22ECF3188B}, // 1e-344 + {0x7432EE873880FC33, 0xBF29DCABA82FDEAE}, // 1e-343 + {0x113FAA2906A13B3F, 0xEEF453D6923BD65A}, // 1e-342 + {0x4AC7CA59A424C507, 0x9558B4661B6565F8}, // 1e-341 + {0x5D79BCF00D2DF649, 0xBAAEE17FA23EBF76}, // 1e-340 + {0xF4D82C2C107973DC, 0xE95A99DF8ACE6F53}, // 1e-339 + {0x79071B9B8A4BE869, 0x91D8A02BB6C10594}, // 1e-338 + {0x9748E2826CDEE284, 0xB64EC836A47146F9}, // 1e-337 + {0xFD1B1B2308169B25, 0xE3E27A444D8D98B7}, // 1e-336 + {0xFE30F0F5E50E20F7, 0x8E6D8C6AB0787F72}, // 1e-335 + {0xBDBD2D335E51A935, 0xB208EF855C969F4F}, // 1e-334 + {0xAD2C788035E61382, 0xDE8B2B66B3BC4723}, // 1e-333 + {0x4C3BCB5021AFCC31, 0x8B16FB203055AC76}, // 1e-332 + {0xDF4ABE242A1BBF3D, 0xADDCB9E83C6B1793}, // 1e-331 + {0xD71D6DAD34A2AF0D, 0xD953E8624B85DD78}, // 1e-330 + {0x8672648C40E5AD68, 0x87D4713D6F33AA6B}, // 1e-329 + {0x680EFDAF511F18C2, 0xA9C98D8CCB009506}, // 1e-328 + {0x0212BD1B2566DEF2, 0xD43BF0EFFDC0BA48}, // 1e-327 + {0x014BB630F7604B57, 0x84A57695FE98746D}, // 1e-326 + {0x419EA3BD35385E2D, 0xA5CED43B7E3E9188}, // 1e-325 + {0x52064CAC828675B9, 0xCF42894A5DCE35EA}, // 1e-324 + {0x7343EFEBD1940993, 0x818995CE7AA0E1B2}, // 1e-323 + {0x1014EBE6C5F90BF8, 0xA1EBFB4219491A1F}, // 1e-322 + {0xD41A26E077774EF6, 0xCA66FA129F9B60A6}, // 1e-321 + {0x8920B098955522B4, 0xFD00B897478238D0}, // 1e-320 + {0x55B46E5F5D5535B0, 0x9E20735E8CB16382}, // 1e-319 + {0xEB2189F734AA831D, 0xC5A890362FDDBC62}, // 1e-318 + {0xA5E9EC7501D523E4, 0xF712B443BBD52B7B}, // 1e-317 + {0x47B233C92125366E, 0x9A6BB0AA55653B2D}, // 1e-316 + {0x999EC0BB696E840A, 0xC1069CD4EABE89F8}, // 1e-315 + {0xC00670EA43CA250D, 0xF148440A256E2C76}, // 1e-314 + {0x380406926A5E5728, 0x96CD2A865764DBCA}, // 1e-313 + {0xC605083704F5ECF2, 0xBC807527ED3E12BC}, // 1e-312 + {0xF7864A44C633682E, 0xEBA09271E88D976B}, // 1e-311 + {0x7AB3EE6AFBE0211D, 0x93445B8731587EA3}, // 1e-310 + {0x5960EA05BAD82964, 0xB8157268FDAE9E4C}, // 1e-309 + {0x6FB92487298E33BD, 0xE61ACF033D1A45DF}, // 1e-308 + {0xA5D3B6D479F8E056, 0x8FD0C16206306BAB}, // 1e-307 + {0x8F48A4899877186C, 0xB3C4F1BA87BC8696}, // 1e-306 + {0x331ACDABFE94DE87, 0xE0B62E2929ABA83C}, // 1e-305 + {0x9FF0C08B7F1D0B14, 0x8C71DCD9BA0B4925}, // 1e-304 + {0x07ECF0AE5EE44DD9, 0xAF8E5410288E1B6F}, // 1e-303 + {0xC9E82CD9F69D6150, 0xDB71E91432B1A24A}, // 1e-302 + {0xBE311C083A225CD2, 0x892731AC9FAF056E}, // 1e-301 + {0x6DBD630A48AAF406, 0xAB70FE17C79AC6CA}, // 1e-300 + {0x092CBBCCDAD5B108, 0xD64D3D9DB981787D}, // 1e-299 + {0x25BBF56008C58EA5, 0x85F0468293F0EB4E}, // 1e-298 + {0xAF2AF2B80AF6F24E, 0xA76C582338ED2621}, // 1e-297 + {0x1AF5AF660DB4AEE1, 0xD1476E2C07286FAA}, // 1e-296 + {0x50D98D9FC890ED4D, 0x82CCA4DB847945CA}, // 1e-295 + {0xE50FF107BAB528A0, 0xA37FCE126597973C}, // 1e-294 + {0x1E53ED49A96272C8, 0xCC5FC196FEFD7D0C}, // 1e-293 + {0x25E8E89C13BB0F7A, 0xFF77B1FCBEBCDC4F}, // 1e-292 + {0x77B191618C54E9AC, 0x9FAACF3DF73609B1}, // 1e-291 + {0xD59DF5B9EF6A2417, 0xC795830D75038C1D}, // 1e-290 + {0x4B0573286B44AD1D, 0xF97AE3D0D2446F25}, // 1e-289 + {0x4EE367F9430AEC32, 0x9BECCE62836AC577}, // 1e-288 + {0x229C41F793CDA73F, 0xC2E801FB244576D5}, // 1e-287 + {0x6B43527578C1110F, 0xF3A20279ED56D48A}, // 1e-286 + {0x830A13896B78AAA9, 0x9845418C345644D6}, // 1e-285 + {0x23CC986BC656D553, 0xBE5691EF416BD60C}, // 1e-284 + {0x2CBFBE86B7EC8AA8, 0xEDEC366B11C6CB8F}, // 1e-283 + {0x7BF7D71432F3D6A9, 0x94B3A202EB1C3F39}, // 1e-282 + {0xDAF5CCD93FB0CC53, 0xB9E08A83A5E34F07}, // 1e-281 + {0xD1B3400F8F9CFF68, 0xE858AD248F5C22C9}, // 1e-280 + {0x23100809B9C21FA1, 0x91376C36D99995BE}, // 1e-279 + {0xABD40A0C2832A78A, 0xB58547448FFFFB2D}, // 1e-278 + {0x16C90C8F323F516C, 0xE2E69915B3FFF9F9}, // 1e-277 + {0xAE3DA7D97F6792E3, 0x8DD01FAD907FFC3B}, // 1e-276 + {0x99CD11CFDF41779C, 0xB1442798F49FFB4A}, // 1e-275 + {0x40405643D711D583, 0xDD95317F31C7FA1D}, // 1e-274 + {0x482835EA666B2572, 0x8A7D3EEF7F1CFC52}, // 1e-273 + {0xDA3243650005EECF, 0xAD1C8EAB5EE43B66}, // 1e-272 + {0x90BED43E40076A82, 0xD863B256369D4A40}, // 1e-271 + {0x5A7744A6E804A291, 0x873E4F75E2224E68}, // 1e-270 + {0x711515D0A205CB36, 0xA90DE3535AAAE202}, // 1e-269 + {0x0D5A5B44CA873E03, 0xD3515C2831559A83}, // 1e-268 + {0xE858790AFE9486C2, 0x8412D9991ED58091}, // 1e-267 + {0x626E974DBE39A872, 0xA5178FFF668AE0B6}, // 1e-266 + {0xFB0A3D212DC8128F, 0xCE5D73FF402D98E3}, // 1e-265 + {0x7CE66634BC9D0B99, 0x80FA687F881C7F8E}, // 1e-264 + {0x1C1FFFC1EBC44E80, 0xA139029F6A239F72}, // 1e-263 + {0xA327FFB266B56220, 0xC987434744AC874E}, // 1e-262 + {0x4BF1FF9F0062BAA8, 0xFBE9141915D7A922}, // 1e-261 + {0x6F773FC3603DB4A9, 0x9D71AC8FADA6C9B5}, // 1e-260 + {0xCB550FB4384D21D3, 0xC4CE17B399107C22}, // 1e-259 + {0x7E2A53A146606A48, 0xF6019DA07F549B2B}, // 1e-258 + {0x2EDA7444CBFC426D, 0x99C102844F94E0FB}, // 1e-257 + {0xFA911155FEFB5308, 0xC0314325637A1939}, // 1e-256 + {0x793555AB7EBA27CA, 0xF03D93EEBC589F88}, // 1e-255 + {0x4BC1558B2F3458DE, 0x96267C7535B763B5}, // 1e-254 + {0x9EB1AAEDFB016F16, 0xBBB01B9283253CA2}, // 1e-253 + {0x465E15A979C1CADC, 0xEA9C227723EE8BCB}, // 1e-252 + {0x0BFACD89EC191EC9, 0x92A1958A7675175F}, // 1e-251 + {0xCEF980EC671F667B, 0xB749FAED14125D36}, // 1e-250 + {0x82B7E12780E7401A, 0xE51C79A85916F484}, // 1e-249 + {0xD1B2ECB8B0908810, 0x8F31CC0937AE58D2}, // 1e-248 + {0x861FA7E6DCB4AA15, 0xB2FE3F0B8599EF07}, // 1e-247 + {0x67A791E093E1D49A, 0xDFBDCECE67006AC9}, // 1e-246 + {0xE0C8BB2C5C6D24E0, 0x8BD6A141006042BD}, // 1e-245 + {0x58FAE9F773886E18, 0xAECC49914078536D}, // 1e-244 + {0xAF39A475506A899E, 0xDA7F5BF590966848}, // 1e-243 + {0x6D8406C952429603, 0x888F99797A5E012D}, // 1e-242 + {0xC8E5087BA6D33B83, 0xAAB37FD7D8F58178}, // 1e-241 + {0xFB1E4A9A90880A64, 0xD5605FCDCF32E1D6}, // 1e-240 + {0x5CF2EEA09A55067F, 0x855C3BE0A17FCD26}, // 1e-239 + {0xF42FAA48C0EA481E, 0xA6B34AD8C9DFC06F}, // 1e-238 + {0xF13B94DAF124DA26, 0xD0601D8EFC57B08B}, // 1e-237 + {0x76C53D08D6B70858, 0x823C12795DB6CE57}, // 1e-236 + {0x54768C4B0C64CA6E, 0xA2CB1717B52481ED}, // 1e-235 + {0xA9942F5DCF7DFD09, 0xCB7DDCDDA26DA268}, // 1e-234 + {0xD3F93B35435D7C4C, 0xFE5D54150B090B02}, // 1e-233 + {0xC47BC5014A1A6DAF, 0x9EFA548D26E5A6E1}, // 1e-232 + {0x359AB6419CA1091B, 0xC6B8E9B0709F109A}, // 1e-231 + {0xC30163D203C94B62, 0xF867241C8CC6D4C0}, // 1e-230 + {0x79E0DE63425DCF1D, 0x9B407691D7FC44F8}, // 1e-229 + {0x985915FC12F542E4, 0xC21094364DFB5636}, // 1e-228 + {0x3E6F5B7B17B2939D, 0xF294B943E17A2BC4}, // 1e-227 + {0xA705992CEECF9C42, 0x979CF3CA6CEC5B5A}, // 1e-226 + {0x50C6FF782A838353, 0xBD8430BD08277231}, // 1e-225 + {0xA4F8BF5635246428, 0xECE53CEC4A314EBD}, // 1e-224 + {0x871B7795E136BE99, 0x940F4613AE5ED136}, // 1e-223 + {0x28E2557B59846E3F, 0xB913179899F68584}, // 1e-222 + {0x331AEADA2FE589CF, 0xE757DD7EC07426E5}, // 1e-221 + {0x3FF0D2C85DEF7621, 0x9096EA6F3848984F}, // 1e-220 + {0x0FED077A756B53A9, 0xB4BCA50B065ABE63}, // 1e-219 + {0xD3E8495912C62894, 0xE1EBCE4DC7F16DFB}, // 1e-218 + {0x64712DD7ABBBD95C, 0x8D3360F09CF6E4BD}, // 1e-217 + {0xBD8D794D96AACFB3, 0xB080392CC4349DEC}, // 1e-216 + {0xECF0D7A0FC5583A0, 0xDCA04777F541C567}, // 1e-215 + {0xF41686C49DB57244, 0x89E42CAAF9491B60}, // 1e-214 + {0x311C2875C522CED5, 0xAC5D37D5B79B6239}, // 1e-213 + {0x7D633293366B828B, 0xD77485CB25823AC7}, // 1e-212 + {0xAE5DFF9C02033197, 0x86A8D39EF77164BC}, // 1e-211 + {0xD9F57F830283FDFC, 0xA8530886B54DBDEB}, // 1e-210 + {0xD072DF63C324FD7B, 0xD267CAA862A12D66}, // 1e-209 + {0x4247CB9E59F71E6D, 0x8380DEA93DA4BC60}, // 1e-208 + {0x52D9BE85F074E608, 0xA46116538D0DEB78}, // 1e-207 + {0x67902E276C921F8B, 0xCD795BE870516656}, // 1e-206 + {0x00BA1CD8A3DB53B6, 0x806BD9714632DFF6}, // 1e-205 + {0x80E8A40ECCD228A4, 0xA086CFCD97BF97F3}, // 1e-204 + {0x6122CD128006B2CD, 0xC8A883C0FDAF7DF0}, // 1e-203 + {0x796B805720085F81, 0xFAD2A4B13D1B5D6C}, // 1e-202 + {0xCBE3303674053BB0, 0x9CC3A6EEC6311A63}, // 1e-201 + {0xBEDBFC4411068A9C, 0xC3F490AA77BD60FC}, // 1e-200 + {0xEE92FB5515482D44, 0xF4F1B4D515ACB93B}, // 1e-199 + {0x751BDD152D4D1C4A, 0x991711052D8BF3C5}, // 1e-198 + {0xD262D45A78A0635D, 0xBF5CD54678EEF0B6}, // 1e-197 + {0x86FB897116C87C34, 0xEF340A98172AACE4}, // 1e-196 + {0xD45D35E6AE3D4DA0, 0x9580869F0E7AAC0E}, // 1e-195 + {0x8974836059CCA109, 0xBAE0A846D2195712}, // 1e-194 + {0x2BD1A438703FC94B, 0xE998D258869FACD7}, // 1e-193 + {0x7B6306A34627DDCF, 0x91FF83775423CC06}, // 1e-192 + {0x1A3BC84C17B1D542, 0xB67F6455292CBF08}, // 1e-191 + {0x20CABA5F1D9E4A93, 0xE41F3D6A7377EECA}, // 1e-190 + {0x547EB47B7282EE9C, 0x8E938662882AF53E}, // 1e-189 + {0xE99E619A4F23AA43, 0xB23867FB2A35B28D}, // 1e-188 + {0x6405FA00E2EC94D4, 0xDEC681F9F4C31F31}, // 1e-187 + {0xDE83BC408DD3DD04, 0x8B3C113C38F9F37E}, // 1e-186 + {0x9624AB50B148D445, 0xAE0B158B4738705E}, // 1e-185 + {0x3BADD624DD9B0957, 0xD98DDAEE19068C76}, // 1e-184 + {0xE54CA5D70A80E5D6, 0x87F8A8D4CFA417C9}, // 1e-183 + {0x5E9FCF4CCD211F4C, 0xA9F6D30A038D1DBC}, // 1e-182 + {0x7647C3200069671F, 0xD47487CC8470652B}, // 1e-181 + {0x29ECD9F40041E073, 0x84C8D4DFD2C63F3B}, // 1e-180 + {0xF468107100525890, 0xA5FB0A17C777CF09}, // 1e-179 + {0x7182148D4066EEB4, 0xCF79CC9DB955C2CC}, // 1e-178 + {0xC6F14CD848405530, 0x81AC1FE293D599BF}, // 1e-177 + {0xB8ADA00E5A506A7C, 0xA21727DB38CB002F}, // 1e-176 + {0xA6D90811F0E4851C, 0xCA9CF1D206FDC03B}, // 1e-175 + {0x908F4A166D1DA663, 0xFD442E4688BD304A}, // 1e-174 + {0x9A598E4E043287FE, 0x9E4A9CEC15763E2E}, // 1e-173 + {0x40EFF1E1853F29FD, 0xC5DD44271AD3CDBA}, // 1e-172 + {0xD12BEE59E68EF47C, 0xF7549530E188C128}, // 1e-171 + {0x82BB74F8301958CE, 0x9A94DD3E8CF578B9}, // 1e-170 + {0xE36A52363C1FAF01, 0xC13A148E3032D6E7}, // 1e-169 + {0xDC44E6C3CB279AC1, 0xF18899B1BC3F8CA1}, // 1e-168 + {0x29AB103A5EF8C0B9, 0x96F5600F15A7B7E5}, // 1e-167 + {0x7415D448F6B6F0E7, 0xBCB2B812DB11A5DE}, // 1e-166 + {0x111B495B3464AD21, 0xEBDF661791D60F56}, // 1e-165 + {0xCAB10DD900BEEC34, 0x936B9FCEBB25C995}, // 1e-164 + {0x3D5D514F40EEA742, 0xB84687C269EF3BFB}, // 1e-163 + {0x0CB4A5A3112A5112, 0xE65829B3046B0AFA}, // 1e-162 + {0x47F0E785EABA72AB, 0x8FF71A0FE2C2E6DC}, // 1e-161 + {0x59ED216765690F56, 0xB3F4E093DB73A093}, // 1e-160 + {0x306869C13EC3532C, 0xE0F218B8D25088B8}, // 1e-159 + {0x1E414218C73A13FB, 0x8C974F7383725573}, // 1e-158 + {0xE5D1929EF90898FA, 0xAFBD2350644EEACF}, // 1e-157 + {0xDF45F746B74ABF39, 0xDBAC6C247D62A583}, // 1e-156 + {0x6B8BBA8C328EB783, 0x894BC396CE5DA772}, // 1e-155 + {0x066EA92F3F326564, 0xAB9EB47C81F5114F}, // 1e-154 + {0xC80A537B0EFEFEBD, 0xD686619BA27255A2}, // 1e-153 + {0xBD06742CE95F5F36, 0x8613FD0145877585}, // 1e-152 + {0x2C48113823B73704, 0xA798FC4196E952E7}, // 1e-151 + {0xF75A15862CA504C5, 0xD17F3B51FCA3A7A0}, // 1e-150 + {0x9A984D73DBE722FB, 0x82EF85133DE648C4}, // 1e-149 + {0xC13E60D0D2E0EBBA, 0xA3AB66580D5FDAF5}, // 1e-148 + {0x318DF905079926A8, 0xCC963FEE10B7D1B3}, // 1e-147 + {0xFDF17746497F7052, 0xFFBBCFE994E5C61F}, // 1e-146 + {0xFEB6EA8BEDEFA633, 0x9FD561F1FD0F9BD3}, // 1e-145 + {0xFE64A52EE96B8FC0, 0xC7CABA6E7C5382C8}, // 1e-144 + {0x3DFDCE7AA3C673B0, 0xF9BD690A1B68637B}, // 1e-143 + {0x06BEA10CA65C084E, 0x9C1661A651213E2D}, // 1e-142 + {0x486E494FCFF30A62, 0xC31BFA0FE5698DB8}, // 1e-141 + {0x5A89DBA3C3EFCCFA, 0xF3E2F893DEC3F126}, // 1e-140 + {0xF89629465A75E01C, 0x986DDB5C6B3A76B7}, // 1e-139 + {0xF6BBB397F1135823, 0xBE89523386091465}, // 1e-138 + {0x746AA07DED582E2C, 0xEE2BA6C0678B597F}, // 1e-137 + {0xA8C2A44EB4571CDC, 0x94DB483840B717EF}, // 1e-136 + {0x92F34D62616CE413, 0xBA121A4650E4DDEB}, // 1e-135 + {0x77B020BAF9C81D17, 0xE896A0D7E51E1566}, // 1e-134 + {0x0ACE1474DC1D122E, 0x915E2486EF32CD60}, // 1e-133 + {0x0D819992132456BA, 0xB5B5ADA8AAFF80B8}, // 1e-132 + {0x10E1FFF697ED6C69, 0xE3231912D5BF60E6}, // 1e-131 + {0xCA8D3FFA1EF463C1, 0x8DF5EFABC5979C8F}, // 1e-130 + {0xBD308FF8A6B17CB2, 0xB1736B96B6FD83B3}, // 1e-129 + {0xAC7CB3F6D05DDBDE, 0xDDD0467C64BCE4A0}, // 1e-128 + {0x6BCDF07A423AA96B, 0x8AA22C0DBEF60EE4}, // 1e-127 + {0x86C16C98D2C953C6, 0xAD4AB7112EB3929D}, // 1e-126 + {0xE871C7BF077BA8B7, 0xD89D64D57A607744}, // 1e-125 + {0x11471CD764AD4972, 0x87625F056C7C4A8B}, // 1e-124 + {0xD598E40D3DD89BCF, 0xA93AF6C6C79B5D2D}, // 1e-123 + {0x4AFF1D108D4EC2C3, 0xD389B47879823479}, // 1e-122 + {0xCEDF722A585139BA, 0x843610CB4BF160CB}, // 1e-121 + {0xC2974EB4EE658828, 0xA54394FE1EEDB8FE}, // 1e-120 + {0x733D226229FEEA32, 0xCE947A3DA6A9273E}, // 1e-119 + {0x0806357D5A3F525F, 0x811CCC668829B887}, // 1e-118 + {0xCA07C2DCB0CF26F7, 0xA163FF802A3426A8}, // 1e-117 + {0xFC89B393DD02F0B5, 0xC9BCFF6034C13052}, // 1e-116 + {0xBBAC2078D443ACE2, 0xFC2C3F3841F17C67}, // 1e-115 + {0xD54B944B84AA4C0D, 0x9D9BA7832936EDC0}, // 1e-114 + {0x0A9E795E65D4DF11, 0xC5029163F384A931}, // 1e-113 + {0x4D4617B5FF4A16D5, 0xF64335BCF065D37D}, // 1e-112 + {0x504BCED1BF8E4E45, 0x99EA0196163FA42E}, // 1e-111 + {0xE45EC2862F71E1D6, 0xC06481FB9BCF8D39}, // 1e-110 + {0x5D767327BB4E5A4C, 0xF07DA27A82C37088}, // 1e-109 + {0x3A6A07F8D510F86F, 0x964E858C91BA2655}, // 1e-108 + {0x890489F70A55368B, 0xBBE226EFB628AFEA}, // 1e-107 + {0x2B45AC74CCEA842E, 0xEADAB0ABA3B2DBE5}, // 1e-106 + {0x3B0B8BC90012929D, 0x92C8AE6B464FC96F}, // 1e-105 + {0x09CE6EBB40173744, 0xB77ADA0617E3BBCB}, // 1e-104 + {0xCC420A6A101D0515, 0xE55990879DDCAABD}, // 1e-103 + {0x9FA946824A12232D, 0x8F57FA54C2A9EAB6}, // 1e-102 + {0x47939822DC96ABF9, 0xB32DF8E9F3546564}, // 1e-101 + {0x59787E2B93BC56F7, 0xDFF9772470297EBD}, // 1e-100 + {0x57EB4EDB3C55B65A, 0x8BFBEA76C619EF36}, // 1e-99 + {0xEDE622920B6B23F1, 0xAEFAE51477A06B03}, // 1e-98 + {0xE95FAB368E45ECED, 0xDAB99E59958885C4}, // 1e-97 + {0x11DBCB0218EBB414, 0x88B402F7FD75539B}, // 1e-96 + {0xD652BDC29F26A119, 0xAAE103B5FCD2A881}, // 1e-95 + {0x4BE76D3346F0495F, 0xD59944A37C0752A2}, // 1e-94 + {0x6F70A4400C562DDB, 0x857FCAE62D8493A5}, // 1e-93 + {0xCB4CCD500F6BB952, 0xA6DFBD9FB8E5B88E}, // 1e-92 + {0x7E2000A41346A7A7, 0xD097AD07A71F26B2}, // 1e-91 + {0x8ED400668C0C28C8, 0x825ECC24C873782F}, // 1e-90 + {0x728900802F0F32FA, 0xA2F67F2DFA90563B}, // 1e-89 + {0x4F2B40A03AD2FFB9, 0xCBB41EF979346BCA}, // 1e-88 + {0xE2F610C84987BFA8, 0xFEA126B7D78186BC}, // 1e-87 + {0x0DD9CA7D2DF4D7C9, 0x9F24B832E6B0F436}, // 1e-86 + {0x91503D1C79720DBB, 0xC6EDE63FA05D3143}, // 1e-85 + {0x75A44C6397CE912A, 0xF8A95FCF88747D94}, // 1e-84 + {0xC986AFBE3EE11ABA, 0x9B69DBE1B548CE7C}, // 1e-83 + {0xFBE85BADCE996168, 0xC24452DA229B021B}, // 1e-82 + {0xFAE27299423FB9C3, 0xF2D56790AB41C2A2}, // 1e-81 + {0xDCCD879FC967D41A, 0x97C560BA6B0919A5}, // 1e-80 + {0x5400E987BBC1C920, 0xBDB6B8E905CB600F}, // 1e-79 + {0x290123E9AAB23B68, 0xED246723473E3813}, // 1e-78 + {0xF9A0B6720AAF6521, 0x9436C0760C86E30B}, // 1e-77 + {0xF808E40E8D5B3E69, 0xB94470938FA89BCE}, // 1e-76 + {0xB60B1D1230B20E04, 0xE7958CB87392C2C2}, // 1e-75 + {0xB1C6F22B5E6F48C2, 0x90BD77F3483BB9B9}, // 1e-74 + {0x1E38AEB6360B1AF3, 0xB4ECD5F01A4AA828}, // 1e-73 + {0x25C6DA63C38DE1B0, 0xE2280B6C20DD5232}, // 1e-72 + {0x579C487E5A38AD0E, 0x8D590723948A535F}, // 1e-71 + {0x2D835A9DF0C6D851, 0xB0AF48EC79ACE837}, // 1e-70 + {0xF8E431456CF88E65, 0xDCDB1B2798182244}, // 1e-69 + {0x1B8E9ECB641B58FF, 0x8A08F0F8BF0F156B}, // 1e-68 + {0xE272467E3D222F3F, 0xAC8B2D36EED2DAC5}, // 1e-67 + {0x5B0ED81DCC6ABB0F, 0xD7ADF884AA879177}, // 1e-66 + {0x98E947129FC2B4E9, 0x86CCBB52EA94BAEA}, // 1e-65 + {0x3F2398D747B36224, 0xA87FEA27A539E9A5}, // 1e-64 + {0x8EEC7F0D19A03AAD, 0xD29FE4B18E88640E}, // 1e-63 + {0x1953CF68300424AC, 0x83A3EEEEF9153E89}, // 1e-62 + {0x5FA8C3423C052DD7, 0xA48CEAAAB75A8E2B}, // 1e-61 + {0x3792F412CB06794D, 0xCDB02555653131B6}, // 1e-60 + {0xE2BBD88BBEE40BD0, 0x808E17555F3EBF11}, // 1e-59 + {0x5B6ACEAEAE9D0EC4, 0xA0B19D2AB70E6ED6}, // 1e-58 + {0xF245825A5A445275, 0xC8DE047564D20A8B}, // 1e-57 + {0xEED6E2F0F0D56712, 0xFB158592BE068D2E}, // 1e-56 + {0x55464DD69685606B, 0x9CED737BB6C4183D}, // 1e-55 + {0xAA97E14C3C26B886, 0xC428D05AA4751E4C}, // 1e-54 + {0xD53DD99F4B3066A8, 0xF53304714D9265DF}, // 1e-53 + {0xE546A8038EFE4029, 0x993FE2C6D07B7FAB}, // 1e-52 + {0xDE98520472BDD033, 0xBF8FDB78849A5F96}, // 1e-51 + {0x963E66858F6D4440, 0xEF73D256A5C0F77C}, // 1e-50 + {0xDDE7001379A44AA8, 0x95A8637627989AAD}, // 1e-49 + {0x5560C018580D5D52, 0xBB127C53B17EC159}, // 1e-48 + {0xAAB8F01E6E10B4A6, 0xE9D71B689DDE71AF}, // 1e-47 + {0xCAB3961304CA70E8, 0x9226712162AB070D}, // 1e-46 + {0x3D607B97C5FD0D22, 0xB6B00D69BB55C8D1}, // 1e-45 + {0x8CB89A7DB77C506A, 0xE45C10C42A2B3B05}, // 1e-44 + {0x77F3608E92ADB242, 0x8EB98A7A9A5B04E3}, // 1e-43 + {0x55F038B237591ED3, 0xB267ED1940F1C61C}, // 1e-42 + {0x6B6C46DEC52F6688, 0xDF01E85F912E37A3}, // 1e-41 + {0x2323AC4B3B3DA015, 0x8B61313BBABCE2C6}, // 1e-40 + {0xABEC975E0A0D081A, 0xAE397D8AA96C1B77}, // 1e-39 + {0x96E7BD358C904A21, 0xD9C7DCED53C72255}, // 1e-38 + {0x7E50D64177DA2E54, 0x881CEA14545C7575}, // 1e-37 + {0xDDE50BD1D5D0B9E9, 0xAA242499697392D2}, // 1e-36 + {0x955E4EC64B44E864, 0xD4AD2DBFC3D07787}, // 1e-35 + {0xBD5AF13BEF0B113E, 0x84EC3C97DA624AB4}, // 1e-34 + {0xECB1AD8AEACDD58E, 0xA6274BBDD0FADD61}, // 1e-33 + {0x67DE18EDA5814AF2, 0xCFB11EAD453994BA}, // 1e-32 + {0x80EACF948770CED7, 0x81CEB32C4B43FCF4}, // 1e-31 + {0xA1258379A94D028D, 0xA2425FF75E14FC31}, // 1e-30 + {0x096EE45813A04330, 0xCAD2F7F5359A3B3E}, // 1e-29 + {0x8BCA9D6E188853FC, 0xFD87B5F28300CA0D}, // 1e-28 + {0x775EA264CF55347D, 0x9E74D1B791E07E48}, // 1e-27 + {0x95364AFE032A819D, 0xC612062576589DDA}, // 1e-26 + {0x3A83DDBD83F52204, 0xF79687AED3EEC551}, // 1e-25 + {0xC4926A9672793542, 0x9ABE14CD44753B52}, // 1e-24 + {0x75B7053C0F178293, 0xC16D9A0095928A27}, // 1e-23 + {0x5324C68B12DD6338, 0xF1C90080BAF72CB1}, // 1e-22 + {0xD3F6FC16EBCA5E03, 0x971DA05074DA7BEE}, // 1e-21 + {0x88F4BB1CA6BCF584, 0xBCE5086492111AEA}, // 1e-20 + {0x2B31E9E3D06C32E5, 0xEC1E4A7DB69561A5}, // 1e-19 + {0x3AFF322E62439FCF, 0x9392EE8E921D5D07}, // 1e-18 + {0x09BEFEB9FAD487C2, 0xB877AA3236A4B449}, // 1e-17 + {0x4C2EBE687989A9B3, 0xE69594BEC44DE15B}, // 1e-16 + {0x0F9D37014BF60A10, 0x901D7CF73AB0ACD9}, // 1e-15 + {0x538484C19EF38C94, 0xB424DC35095CD80F}, // 1e-14 + {0x2865A5F206B06FB9, 0xE12E13424BB40E13}, // 1e-13 + {0xF93F87B7442E45D3, 0x8CBCCC096F5088CB}, // 1e-12 + {0xF78F69A51539D748, 0xAFEBFF0BCB24AAFE}, // 1e-11 + {0xB573440E5A884D1B, 0xDBE6FECEBDEDD5BE}, // 1e-10 + {0x31680A88F8953030, 0x89705F4136B4A597}, // 1e-9 + {0xFDC20D2B36BA7C3D, 0xABCC77118461CEFC}, // 1e-8 + {0x3D32907604691B4C, 0xD6BF94D5E57A42BC}, // 1e-7 + {0xA63F9A49C2C1B10F, 0x8637BD05AF6C69B5}, // 1e-6 + {0x0FCF80DC33721D53, 0xA7C5AC471B478423}, // 1e-5 + {0xD3C36113404EA4A8, 0xD1B71758E219652B}, // 1e-4 + {0x645A1CAC083126E9, 0x83126E978D4FDF3B}, // 1e-3 + {0x3D70A3D70A3D70A3, 0xA3D70A3D70A3D70A}, // 1e-2 + {0xCCCCCCCCCCCCCCCC, 0xCCCCCCCCCCCCCCCC}, // 1e-1 + {0x0000000000000000, 0x8000000000000000}, // 1e0 + {0x0000000000000000, 0xA000000000000000}, // 1e1 + {0x0000000000000000, 0xC800000000000000}, // 1e2 + {0x0000000000000000, 0xFA00000000000000}, // 1e3 + {0x0000000000000000, 0x9C40000000000000}, // 1e4 + {0x0000000000000000, 0xC350000000000000}, // 1e5 + {0x0000000000000000, 0xF424000000000000}, // 1e6 + {0x0000000000000000, 0x9896800000000000}, // 1e7 + {0x0000000000000000, 0xBEBC200000000000}, // 1e8 + {0x0000000000000000, 0xEE6B280000000000}, // 1e9 + {0x0000000000000000, 0x9502F90000000000}, // 1e10 + {0x0000000000000000, 0xBA43B74000000000}, // 1e11 + {0x0000000000000000, 0xE8D4A51000000000}, // 1e12 + {0x0000000000000000, 0x9184E72A00000000}, // 1e13 + {0x0000000000000000, 0xB5E620F480000000}, // 1e14 + {0x0000000000000000, 0xE35FA931A0000000}, // 1e15 + {0x0000000000000000, 0x8E1BC9BF04000000}, // 1e16 + {0x0000000000000000, 0xB1A2BC2EC5000000}, // 1e17 + {0x0000000000000000, 0xDE0B6B3A76400000}, // 1e18 + {0x0000000000000000, 0x8AC7230489E80000}, // 1e19 + {0x0000000000000000, 0xAD78EBC5AC620000}, // 1e20 + {0x0000000000000000, 0xD8D726B7177A8000}, // 1e21 + {0x0000000000000000, 0x878678326EAC9000}, // 1e22 + {0x0000000000000000, 0xA968163F0A57B400}, // 1e23 + {0x0000000000000000, 0xD3C21BCECCEDA100}, // 1e24 + {0x0000000000000000, 0x84595161401484A0}, // 1e25 + {0x0000000000000000, 0xA56FA5B99019A5C8}, // 1e26 + {0x0000000000000000, 0xCECB8F27F4200F3A}, // 1e27 + {0x4000000000000000, 0x813F3978F8940984}, // 1e28 + {0x5000000000000000, 0xA18F07D736B90BE5}, // 1e29 + {0xA400000000000000, 0xC9F2C9CD04674EDE}, // 1e30 + {0x4D00000000000000, 0xFC6F7C4045812296}, // 1e31 + {0xF020000000000000, 0x9DC5ADA82B70B59D}, // 1e32 + {0x6C28000000000000, 0xC5371912364CE305}, // 1e33 + {0xC732000000000000, 0xF684DF56C3E01BC6}, // 1e34 + {0x3C7F400000000000, 0x9A130B963A6C115C}, // 1e35 + {0x4B9F100000000000, 0xC097CE7BC90715B3}, // 1e36 + {0x1E86D40000000000, 0xF0BDC21ABB48DB20}, // 1e37 + {0x1314448000000000, 0x96769950B50D88F4}, // 1e38 + {0x17D955A000000000, 0xBC143FA4E250EB31}, // 1e39 + {0x5DCFAB0800000000, 0xEB194F8E1AE525FD}, // 1e40 + {0x5AA1CAE500000000, 0x92EFD1B8D0CF37BE}, // 1e41 + {0xF14A3D9E40000000, 0xB7ABC627050305AD}, // 1e42 + {0x6D9CCD05D0000000, 0xE596B7B0C643C719}, // 1e43 + {0xE4820023A2000000, 0x8F7E32CE7BEA5C6F}, // 1e44 + {0xDDA2802C8A800000, 0xB35DBF821AE4F38B}, // 1e45 + {0xD50B2037AD200000, 0xE0352F62A19E306E}, // 1e46 + {0x4526F422CC340000, 0x8C213D9DA502DE45}, // 1e47 + {0x9670B12B7F410000, 0xAF298D050E4395D6}, // 1e48 + {0x3C0CDD765F114000, 0xDAF3F04651D47B4C}, // 1e49 + {0xA5880A69FB6AC800, 0x88D8762BF324CD0F}, // 1e50 + {0x8EEA0D047A457A00, 0xAB0E93B6EFEE0053}, // 1e51 + {0x72A4904598D6D880, 0xD5D238A4ABE98068}, // 1e52 + {0x47A6DA2B7F864750, 0x85A36366EB71F041}, // 1e53 + {0x999090B65F67D924, 0xA70C3C40A64E6C51}, // 1e54 + {0xFFF4B4E3F741CF6D, 0xD0CF4B50CFE20765}, // 1e55 + {0xBFF8F10E7A8921A4, 0x82818F1281ED449F}, // 1e56 + {0xAFF72D52192B6A0D, 0xA321F2D7226895C7}, // 1e57 + {0x9BF4F8A69F764490, 0xCBEA6F8CEB02BB39}, // 1e58 + {0x02F236D04753D5B4, 0xFEE50B7025C36A08}, // 1e59 + {0x01D762422C946590, 0x9F4F2726179A2245}, // 1e60 + {0x424D3AD2B7B97EF5, 0xC722F0EF9D80AAD6}, // 1e61 + {0xD2E0898765A7DEB2, 0xF8EBAD2B84E0D58B}, // 1e62 + {0x63CC55F49F88EB2F, 0x9B934C3B330C8577}, // 1e63 + {0x3CBF6B71C76B25FB, 0xC2781F49FFCFA6D5}, // 1e64 + {0x8BEF464E3945EF7A, 0xF316271C7FC3908A}, // 1e65 + {0x97758BF0E3CBB5AC, 0x97EDD871CFDA3A56}, // 1e66 + {0x3D52EEED1CBEA317, 0xBDE94E8E43D0C8EC}, // 1e67 + {0x4CA7AAA863EE4BDD, 0xED63A231D4C4FB27}, // 1e68 + {0x8FE8CAA93E74EF6A, 0x945E455F24FB1CF8}, // 1e69 + {0xB3E2FD538E122B44, 0xB975D6B6EE39E436}, // 1e70 + {0x60DBBCA87196B616, 0xE7D34C64A9C85D44}, // 1e71 + {0xBC8955E946FE31CD, 0x90E40FBEEA1D3A4A}, // 1e72 + {0x6BABAB6398BDBE41, 0xB51D13AEA4A488DD}, // 1e73 + {0xC696963C7EED2DD1, 0xE264589A4DCDAB14}, // 1e74 + {0xFC1E1DE5CF543CA2, 0x8D7EB76070A08AEC}, // 1e75 + {0x3B25A55F43294BCB, 0xB0DE65388CC8ADA8}, // 1e76 + {0x49EF0EB713F39EBE, 0xDD15FE86AFFAD912}, // 1e77 + {0x6E3569326C784337, 0x8A2DBF142DFCC7AB}, // 1e78 + {0x49C2C37F07965404, 0xACB92ED9397BF996}, // 1e79 + {0xDC33745EC97BE906, 0xD7E77A8F87DAF7FB}, // 1e80 + {0x69A028BB3DED71A3, 0x86F0AC99B4E8DAFD}, // 1e81 + {0xC40832EA0D68CE0C, 0xA8ACD7C0222311BC}, // 1e82 + {0xF50A3FA490C30190, 0xD2D80DB02AABD62B}, // 1e83 + {0x792667C6DA79E0FA, 0x83C7088E1AAB65DB}, // 1e84 + {0x577001B891185938, 0xA4B8CAB1A1563F52}, // 1e85 + {0xED4C0226B55E6F86, 0xCDE6FD5E09ABCF26}, // 1e86 + {0x544F8158315B05B4, 0x80B05E5AC60B6178}, // 1e87 + {0x696361AE3DB1C721, 0xA0DC75F1778E39D6}, // 1e88 + {0x03BC3A19CD1E38E9, 0xC913936DD571C84C}, // 1e89 + {0x04AB48A04065C723, 0xFB5878494ACE3A5F}, // 1e90 + {0x62EB0D64283F9C76, 0x9D174B2DCEC0E47B}, // 1e91 + {0x3BA5D0BD324F8394, 0xC45D1DF942711D9A}, // 1e92 + {0xCA8F44EC7EE36479, 0xF5746577930D6500}, // 1e93 + {0x7E998B13CF4E1ECB, 0x9968BF6ABBE85F20}, // 1e94 + {0x9E3FEDD8C321A67E, 0xBFC2EF456AE276E8}, // 1e95 + {0xC5CFE94EF3EA101E, 0xEFB3AB16C59B14A2}, // 1e96 + {0xBBA1F1D158724A12, 0x95D04AEE3B80ECE5}, // 1e97 + {0x2A8A6E45AE8EDC97, 0xBB445DA9CA61281F}, // 1e98 + {0xF52D09D71A3293BD, 0xEA1575143CF97226}, // 1e99 + {0x593C2626705F9C56, 0x924D692CA61BE758}, // 1e100 + {0x6F8B2FB00C77836C, 0xB6E0C377CFA2E12E}, // 1e101 + {0x0B6DFB9C0F956447, 0xE498F455C38B997A}, // 1e102 + {0x4724BD4189BD5EAC, 0x8EDF98B59A373FEC}, // 1e103 + {0x58EDEC91EC2CB657, 0xB2977EE300C50FE7}, // 1e104 + {0x2F2967B66737E3ED, 0xDF3D5E9BC0F653E1}, // 1e105 + {0xBD79E0D20082EE74, 0x8B865B215899F46C}, // 1e106 + {0xECD8590680A3AA11, 0xAE67F1E9AEC07187}, // 1e107 + {0xE80E6F4820CC9495, 0xDA01EE641A708DE9}, // 1e108 + {0x3109058D147FDCDD, 0x884134FE908658B2}, // 1e109 + {0xBD4B46F0599FD415, 0xAA51823E34A7EEDE}, // 1e110 + {0x6C9E18AC7007C91A, 0xD4E5E2CDC1D1EA96}, // 1e111 + {0x03E2CF6BC604DDB0, 0x850FADC09923329E}, // 1e112 + {0x84DB8346B786151C, 0xA6539930BF6BFF45}, // 1e113 + {0xE612641865679A63, 0xCFE87F7CEF46FF16}, // 1e114 + {0x4FCB7E8F3F60C07E, 0x81F14FAE158C5F6E}, // 1e115 + {0xE3BE5E330F38F09D, 0xA26DA3999AEF7749}, // 1e116 + {0x5CADF5BFD3072CC5, 0xCB090C8001AB551C}, // 1e117 + {0x73D9732FC7C8F7F6, 0xFDCB4FA002162A63}, // 1e118 + {0x2867E7FDDCDD9AFA, 0x9E9F11C4014DDA7E}, // 1e119 + {0xB281E1FD541501B8, 0xC646D63501A1511D}, // 1e120 + {0x1F225A7CA91A4226, 0xF7D88BC24209A565}, // 1e121 + {0x3375788DE9B06958, 0x9AE757596946075F}, // 1e122 + {0x0052D6B1641C83AE, 0xC1A12D2FC3978937}, // 1e123 + {0xC0678C5DBD23A49A, 0xF209787BB47D6B84}, // 1e124 + {0xF840B7BA963646E0, 0x9745EB4D50CE6332}, // 1e125 + {0xB650E5A93BC3D898, 0xBD176620A501FBFF}, // 1e126 + {0xA3E51F138AB4CEBE, 0xEC5D3FA8CE427AFF}, // 1e127 + {0xC66F336C36B10137, 0x93BA47C980E98CDF}, // 1e128 + {0xB80B0047445D4184, 0xB8A8D9BBE123F017}, // 1e129 + {0xA60DC059157491E5, 0xE6D3102AD96CEC1D}, // 1e130 + {0x87C89837AD68DB2F, 0x9043EA1AC7E41392}, // 1e131 + {0x29BABE4598C311FB, 0xB454E4A179DD1877}, // 1e132 + {0xF4296DD6FEF3D67A, 0xE16A1DC9D8545E94}, // 1e133 + {0x1899E4A65F58660C, 0x8CE2529E2734BB1D}, // 1e134 + {0x5EC05DCFF72E7F8F, 0xB01AE745B101E9E4}, // 1e135 + {0x76707543F4FA1F73, 0xDC21A1171D42645D}, // 1e136 + {0x6A06494A791C53A8, 0x899504AE72497EBA}, // 1e137 + {0x0487DB9D17636892, 0xABFA45DA0EDBDE69}, // 1e138 + {0x45A9D2845D3C42B6, 0xD6F8D7509292D603}, // 1e139 + {0x0B8A2392BA45A9B2, 0x865B86925B9BC5C2}, // 1e140 + {0x8E6CAC7768D7141E, 0xA7F26836F282B732}, // 1e141 + {0x3207D795430CD926, 0xD1EF0244AF2364FF}, // 1e142 + {0x7F44E6BD49E807B8, 0x8335616AED761F1F}, // 1e143 + {0x5F16206C9C6209A6, 0xA402B9C5A8D3A6E7}, // 1e144 + {0x36DBA887C37A8C0F, 0xCD036837130890A1}, // 1e145 + {0xC2494954DA2C9789, 0x802221226BE55A64}, // 1e146 + {0xF2DB9BAA10B7BD6C, 0xA02AA96B06DEB0FD}, // 1e147 + {0x6F92829494E5ACC7, 0xC83553C5C8965D3D}, // 1e148 + {0xCB772339BA1F17F9, 0xFA42A8B73ABBF48C}, // 1e149 + {0xFF2A760414536EFB, 0x9C69A97284B578D7}, // 1e150 + {0xFEF5138519684ABA, 0xC38413CF25E2D70D}, // 1e151 + {0x7EB258665FC25D69, 0xF46518C2EF5B8CD1}, // 1e152 + {0xEF2F773FFBD97A61, 0x98BF2F79D5993802}, // 1e153 + {0xAAFB550FFACFD8FA, 0xBEEEFB584AFF8603}, // 1e154 + {0x95BA2A53F983CF38, 0xEEAABA2E5DBF6784}, // 1e155 + {0xDD945A747BF26183, 0x952AB45CFA97A0B2}, // 1e156 + {0x94F971119AEEF9E4, 0xBA756174393D88DF}, // 1e157 + {0x7A37CD5601AAB85D, 0xE912B9D1478CEB17}, // 1e158 + {0xAC62E055C10AB33A, 0x91ABB422CCB812EE}, // 1e159 + {0x577B986B314D6009, 0xB616A12B7FE617AA}, // 1e160 + {0xED5A7E85FDA0B80B, 0xE39C49765FDF9D94}, // 1e161 + {0x14588F13BE847307, 0x8E41ADE9FBEBC27D}, // 1e162 + {0x596EB2D8AE258FC8, 0xB1D219647AE6B31C}, // 1e163 + {0x6FCA5F8ED9AEF3BB, 0xDE469FBD99A05FE3}, // 1e164 + {0x25DE7BB9480D5854, 0x8AEC23D680043BEE}, // 1e165 + {0xAF561AA79A10AE6A, 0xADA72CCC20054AE9}, // 1e166 + {0x1B2BA1518094DA04, 0xD910F7FF28069DA4}, // 1e167 + {0x90FB44D2F05D0842, 0x87AA9AFF79042286}, // 1e168 + {0x353A1607AC744A53, 0xA99541BF57452B28}, // 1e169 + {0x42889B8997915CE8, 0xD3FA922F2D1675F2}, // 1e170 + {0x69956135FEBADA11, 0x847C9B5D7C2E09B7}, // 1e171 + {0x43FAB9837E699095, 0xA59BC234DB398C25}, // 1e172 + {0x94F967E45E03F4BB, 0xCF02B2C21207EF2E}, // 1e173 + {0x1D1BE0EEBAC278F5, 0x8161AFB94B44F57D}, // 1e174 + {0x6462D92A69731732, 0xA1BA1BA79E1632DC}, // 1e175 + {0x7D7B8F7503CFDCFE, 0xCA28A291859BBF93}, // 1e176 + {0x5CDA735244C3D43E, 0xFCB2CB35E702AF78}, // 1e177 + {0x3A0888136AFA64A7, 0x9DEFBF01B061ADAB}, // 1e178 + {0x088AAA1845B8FDD0, 0xC56BAEC21C7A1916}, // 1e179 + {0x8AAD549E57273D45, 0xF6C69A72A3989F5B}, // 1e180 + {0x36AC54E2F678864B, 0x9A3C2087A63F6399}, // 1e181 + {0x84576A1BB416A7DD, 0xC0CB28A98FCF3C7F}, // 1e182 + {0x656D44A2A11C51D5, 0xF0FDF2D3F3C30B9F}, // 1e183 + {0x9F644AE5A4B1B325, 0x969EB7C47859E743}, // 1e184 + {0x873D5D9F0DDE1FEE, 0xBC4665B596706114}, // 1e185 + {0xA90CB506D155A7EA, 0xEB57FF22FC0C7959}, // 1e186 + {0x09A7F12442D588F2, 0x9316FF75DD87CBD8}, // 1e187 + {0x0C11ED6D538AEB2F, 0xB7DCBF5354E9BECE}, // 1e188 + {0x8F1668C8A86DA5FA, 0xE5D3EF282A242E81}, // 1e189 + {0xF96E017D694487BC, 0x8FA475791A569D10}, // 1e190 + {0x37C981DCC395A9AC, 0xB38D92D760EC4455}, // 1e191 + {0x85BBE253F47B1417, 0xE070F78D3927556A}, // 1e192 + {0x93956D7478CCEC8E, 0x8C469AB843B89562}, // 1e193 + {0x387AC8D1970027B2, 0xAF58416654A6BABB}, // 1e194 + {0x06997B05FCC0319E, 0xDB2E51BFE9D0696A}, // 1e195 + {0x441FECE3BDF81F03, 0x88FCF317F22241E2}, // 1e196 + {0xD527E81CAD7626C3, 0xAB3C2FDDEEAAD25A}, // 1e197 + {0x8A71E223D8D3B074, 0xD60B3BD56A5586F1}, // 1e198 + {0xF6872D5667844E49, 0x85C7056562757456}, // 1e199 + {0xB428F8AC016561DB, 0xA738C6BEBB12D16C}, // 1e200 + {0xE13336D701BEBA52, 0xD106F86E69D785C7}, // 1e201 + {0xECC0024661173473, 0x82A45B450226B39C}, // 1e202 + {0x27F002D7F95D0190, 0xA34D721642B06084}, // 1e203 + {0x31EC038DF7B441F4, 0xCC20CE9BD35C78A5}, // 1e204 + {0x7E67047175A15271, 0xFF290242C83396CE}, // 1e205 + {0x0F0062C6E984D386, 0x9F79A169BD203E41}, // 1e206 + {0x52C07B78A3E60868, 0xC75809C42C684DD1}, // 1e207 + {0xA7709A56CCDF8A82, 0xF92E0C3537826145}, // 1e208 + {0x88A66076400BB691, 0x9BBCC7A142B17CCB}, // 1e209 + {0x6ACFF893D00EA435, 0xC2ABF989935DDBFE}, // 1e210 + {0x0583F6B8C4124D43, 0xF356F7EBF83552FE}, // 1e211 + {0xC3727A337A8B704A, 0x98165AF37B2153DE}, // 1e212 + {0x744F18C0592E4C5C, 0xBE1BF1B059E9A8D6}, // 1e213 + {0x1162DEF06F79DF73, 0xEDA2EE1C7064130C}, // 1e214 + {0x8ADDCB5645AC2BA8, 0x9485D4D1C63E8BE7}, // 1e215 + {0x6D953E2BD7173692, 0xB9A74A0637CE2EE1}, // 1e216 + {0xC8FA8DB6CCDD0437, 0xE8111C87C5C1BA99}, // 1e217 + {0x1D9C9892400A22A2, 0x910AB1D4DB9914A0}, // 1e218 + {0x2503BEB6D00CAB4B, 0xB54D5E4A127F59C8}, // 1e219 + {0x2E44AE64840FD61D, 0xE2A0B5DC971F303A}, // 1e220 + {0x5CEAECFED289E5D2, 0x8DA471A9DE737E24}, // 1e221 + {0x7425A83E872C5F47, 0xB10D8E1456105DAD}, // 1e222 + {0xD12F124E28F77719, 0xDD50F1996B947518}, // 1e223 + {0x82BD6B70D99AAA6F, 0x8A5296FFE33CC92F}, // 1e224 + {0x636CC64D1001550B, 0xACE73CBFDC0BFB7B}, // 1e225 + {0x3C47F7E05401AA4E, 0xD8210BEFD30EFA5A}, // 1e226 + {0x65ACFAEC34810A71, 0x8714A775E3E95C78}, // 1e227 + {0x7F1839A741A14D0D, 0xA8D9D1535CE3B396}, // 1e228 + {0x1EDE48111209A050, 0xD31045A8341CA07C}, // 1e229 + {0x934AED0AAB460432, 0x83EA2B892091E44D}, // 1e230 + {0xF81DA84D5617853F, 0xA4E4B66B68B65D60}, // 1e231 + {0x36251260AB9D668E, 0xCE1DE40642E3F4B9}, // 1e232 + {0xC1D72B7C6B426019, 0x80D2AE83E9CE78F3}, // 1e233 + {0xB24CF65B8612F81F, 0xA1075A24E4421730}, // 1e234 + {0xDEE033F26797B627, 0xC94930AE1D529CFC}, // 1e235 + {0x169840EF017DA3B1, 0xFB9B7CD9A4A7443C}, // 1e236 + {0x8E1F289560EE864E, 0x9D412E0806E88AA5}, // 1e237 + {0xF1A6F2BAB92A27E2, 0xC491798A08A2AD4E}, // 1e238 + {0xAE10AF696774B1DB, 0xF5B5D7EC8ACB58A2}, // 1e239 + {0xACCA6DA1E0A8EF29, 0x9991A6F3D6BF1765}, // 1e240 + {0x17FD090A58D32AF3, 0xBFF610B0CC6EDD3F}, // 1e241 + {0xDDFC4B4CEF07F5B0, 0xEFF394DCFF8A948E}, // 1e242 + {0x4ABDAF101564F98E, 0x95F83D0A1FB69CD9}, // 1e243 + {0x9D6D1AD41ABE37F1, 0xBB764C4CA7A4440F}, // 1e244 + {0x84C86189216DC5ED, 0xEA53DF5FD18D5513}, // 1e245 + {0x32FD3CF5B4E49BB4, 0x92746B9BE2F8552C}, // 1e246 + {0x3FBC8C33221DC2A1, 0xB7118682DBB66A77}, // 1e247 + {0x0FABAF3FEAA5334A, 0xE4D5E82392A40515}, // 1e248 + {0x29CB4D87F2A7400E, 0x8F05B1163BA6832D}, // 1e249 + {0x743E20E9EF511012, 0xB2C71D5BCA9023F8}, // 1e250 + {0x914DA9246B255416, 0xDF78E4B2BD342CF6}, // 1e251 + {0x1AD089B6C2F7548E, 0x8BAB8EEFB6409C1A}, // 1e252 + {0xA184AC2473B529B1, 0xAE9672ABA3D0C320}, // 1e253 + {0xC9E5D72D90A2741E, 0xDA3C0F568CC4F3E8}, // 1e254 + {0x7E2FA67C7A658892, 0x8865899617FB1871}, // 1e255 + {0xDDBB901B98FEEAB7, 0xAA7EEBFB9DF9DE8D}, // 1e256 + {0x552A74227F3EA565, 0xD51EA6FA85785631}, // 1e257 + {0xD53A88958F87275F, 0x8533285C936B35DE}, // 1e258 + {0x8A892ABAF368F137, 0xA67FF273B8460356}, // 1e259 + {0x2D2B7569B0432D85, 0xD01FEF10A657842C}, // 1e260 + {0x9C3B29620E29FC73, 0x8213F56A67F6B29B}, // 1e261 + {0x8349F3BA91B47B8F, 0xA298F2C501F45F42}, // 1e262 + {0x241C70A936219A73, 0xCB3F2F7642717713}, // 1e263 + {0xED238CD383AA0110, 0xFE0EFB53D30DD4D7}, // 1e264 + {0xF4363804324A40AA, 0x9EC95D1463E8A506}, // 1e265 + {0xB143C6053EDCD0D5, 0xC67BB4597CE2CE48}, // 1e266 + {0xDD94B7868E94050A, 0xF81AA16FDC1B81DA}, // 1e267 + {0xCA7CF2B4191C8326, 0x9B10A4E5E9913128}, // 1e268 + {0xFD1C2F611F63A3F0, 0xC1D4CE1F63F57D72}, // 1e269 + {0xBC633B39673C8CEC, 0xF24A01A73CF2DCCF}, // 1e270 + {0xD5BE0503E085D813, 0x976E41088617CA01}, // 1e271 + {0x4B2D8644D8A74E18, 0xBD49D14AA79DBC82}, // 1e272 + {0xDDF8E7D60ED1219E, 0xEC9C459D51852BA2}, // 1e273 + {0xCABB90E5C942B503, 0x93E1AB8252F33B45}, // 1e274 + {0x3D6A751F3B936243, 0xB8DA1662E7B00A17}, // 1e275 + {0x0CC512670A783AD4, 0xE7109BFBA19C0C9D}, // 1e276 + {0x27FB2B80668B24C5, 0x906A617D450187E2}, // 1e277 + {0xB1F9F660802DEDF6, 0xB484F9DC9641E9DA}, // 1e278 + {0x5E7873F8A0396973, 0xE1A63853BBD26451}, // 1e279 + {0xDB0B487B6423E1E8, 0x8D07E33455637EB2}, // 1e280 + {0x91CE1A9A3D2CDA62, 0xB049DC016ABC5E5F}, // 1e281 + {0x7641A140CC7810FB, 0xDC5C5301C56B75F7}, // 1e282 + {0xA9E904C87FCB0A9D, 0x89B9B3E11B6329BA}, // 1e283 + {0x546345FA9FBDCD44, 0xAC2820D9623BF429}, // 1e284 + {0xA97C177947AD4095, 0xD732290FBACAF133}, // 1e285 + {0x49ED8EABCCCC485D, 0x867F59A9D4BED6C0}, // 1e286 + {0x5C68F256BFFF5A74, 0xA81F301449EE8C70}, // 1e287 + {0x73832EEC6FFF3111, 0xD226FC195C6A2F8C}, // 1e288 + {0xC831FD53C5FF7EAB, 0x83585D8FD9C25DB7}, // 1e289 + {0xBA3E7CA8B77F5E55, 0xA42E74F3D032F525}, // 1e290 + {0x28CE1BD2E55F35EB, 0xCD3A1230C43FB26F}, // 1e291 + {0x7980D163CF5B81B3, 0x80444B5E7AA7CF85}, // 1e292 + {0xD7E105BCC332621F, 0xA0555E361951C366}, // 1e293 + {0x8DD9472BF3FEFAA7, 0xC86AB5C39FA63440}, // 1e294 + {0xB14F98F6F0FEB951, 0xFA856334878FC150}, // 1e295 + {0x6ED1BF9A569F33D3, 0x9C935E00D4B9D8D2}, // 1e296 + {0x0A862F80EC4700C8, 0xC3B8358109E84F07}, // 1e297 + {0xCD27BB612758C0FA, 0xF4A642E14C6262C8}, // 1e298 + {0x8038D51CB897789C, 0x98E7E9CCCFBD7DBD}, // 1e299 + {0xE0470A63E6BD56C3, 0xBF21E44003ACDD2C}, // 1e300 + {0x1858CCFCE06CAC74, 0xEEEA5D5004981478}, // 1e301 + {0x0F37801E0C43EBC8, 0x95527A5202DF0CCB}, // 1e302 + {0xD30560258F54E6BA, 0xBAA718E68396CFFD}, // 1e303 + {0x47C6B82EF32A2069, 0xE950DF20247C83FD}, // 1e304 + {0x4CDC331D57FA5441, 0x91D28B7416CDD27E}, // 1e305 + {0xE0133FE4ADF8E952, 0xB6472E511C81471D}, // 1e306 + {0x58180FDDD97723A6, 0xE3D8F9E563A198E5}, // 1e307 + {0x570F09EAA7EA7648, 0x8E679C2F5E44FF8F}, // 1e308 + {0x2CD2CC6551E513DA, 0xB201833B35D63F73}, // 1e309 + {0xF8077F7EA65E58D1, 0xDE81E40A034BCF4F}, // 1e310 + {0xFB04AFAF27FAF782, 0x8B112E86420F6191}, // 1e311 + {0x79C5DB9AF1F9B563, 0xADD57A27D29339F6}, // 1e312 + {0x18375281AE7822BC, 0xD94AD8B1C7380874}, // 1e313 + {0x8F2293910D0B15B5, 0x87CEC76F1C830548}, // 1e314 + {0xB2EB3875504DDB22, 0xA9C2794AE3A3C69A}, // 1e315 + {0x5FA60692A46151EB, 0xD433179D9C8CB841}, // 1e316 + {0xDBC7C41BA6BCD333, 0x849FEEC281D7F328}, // 1e317 + {0x12B9B522906C0800, 0xA5C7EA73224DEFF3}, // 1e318 + {0xD768226B34870A00, 0xCF39E50FEAE16BEF}, // 1e319 + {0xE6A1158300D46640, 0x81842F29F2CCE375}, // 1e320 + {0x60495AE3C1097FD0, 0xA1E53AF46F801C53}, // 1e321 + {0x385BB19CB14BDFC4, 0xCA5E89B18B602368}, // 1e322 + {0x46729E03DD9ED7B5, 0xFCF62C1DEE382C42}, // 1e323 + {0x6C07A2C26A8346D1, 0x9E19DB92B4E31BA9}, // 1e324 + {0xC7098B7305241885, 0xC5A05277621BE293}, // 1e325 + {0xB8CBEE4FC66D1EA7, 0xF70867153AA2DB38}, // 1e326 + {0x737F74F1DC043328, 0x9A65406D44A5C903}, // 1e327 + {0x505F522E53053FF2, 0xC0FE908895CF3B44}, // 1e328 + {0x647726B9E7C68FEF, 0xF13E34AABB430A15}, // 1e329 + {0x5ECA783430DC19F5, 0x96C6E0EAB509E64D}, // 1e330 + {0xB67D16413D132072, 0xBC789925624C5FE0}, // 1e331 + {0xE41C5BD18C57E88F, 0xEB96BF6EBADF77D8}, // 1e332 + {0x8E91B962F7B6F159, 0x933E37A534CBAAE7}, // 1e333 + {0x723627BBB5A4ADB0, 0xB80DC58E81FE95A1}, // 1e334 + {0xCEC3B1AAA30DD91C, 0xE61136F2227E3B09}, // 1e335 + {0x213A4F0AA5E8A7B1, 0x8FCAC257558EE4E6}, // 1e336 + {0xA988E2CD4F62D19D, 0xB3BD72ED2AF29E1F}, // 1e337 + {0x93EB1B80A33B8605, 0xE0ACCFA875AF45A7}, // 1e338 + {0xBC72F130660533C3, 0x8C6C01C9498D8B88}, // 1e339 + {0xEB8FAD7C7F8680B4, 0xAF87023B9BF0EE6A}, // 1e340 + {0xA67398DB9F6820E1, 0xDB68C2CA82ED2A05}, // 1e341 + {0x88083F8943A1148C, 0x892179BE91D43A43}, // 1e342 + {0x6A0A4F6B948959B0, 0xAB69D82E364948D4}, // 1e343 + {0x848CE34679ABB01C, 0xD6444E39C3DB9B09}, // 1e344 + {0xF2D80E0C0C0B4E11, 0x85EAB0E41A6940E5}, // 1e345 + {0x6F8E118F0F0E2195, 0xA7655D1D2103911F}, // 1e346 + {0x4B7195F2D2D1A9FB, 0xD13EB46469447567}, // 1e347 +}; + +} // namespace internal +} // namespace __llvm_libc + +#endif // LIBC_SRC_SUPPORT_DETAILED_POWERS_OF_TEN_H diff --git a/libc/src/__support/high_precision_decimal.h b/libc/src/__support/high_precision_decimal.h --- a/libc/src/__support/high_precision_decimal.h +++ b/libc/src/__support/high_precision_decimal.h @@ -291,6 +291,7 @@ sawDigit = true; if (*numString == '0' && this->numDigits == 0) { --this->decimalPoint; + ++numString; continue; } if (this->numDigits < MAX_NUM_DIGITS) { @@ -311,6 +312,11 @@ ++numString; if (isdigit(*numString) || *numString == '+' || *numString == '-') { int32_t addToExp = strtointeger(numString, nullptr, 10); + if (addToExp > 100000) { + addToExp = 100000; + } else if (addToExp < -100000) { + addToExp = -100000; + } this->decimalPoint += addToExp; } } diff --git a/libc/src/__support/str_to_float.h b/libc/src/__support/str_to_float.h new file mode 100644 --- /dev/null +++ b/libc/src/__support/str_to_float.h @@ -0,0 +1,566 @@ +//===-- String to float conversion utils ------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef LIBC_SRC_SUPPORT_STR_TO_FLOAT_H +#define LIBC_SRC_SUPPORT_STR_TO_FLOAT_H + +#include "src/__support/FPUtil/FPBits.h" +#include "src/__support/ctype_utils.h" +#include "src/__support/detailed_powers_of_ten.h" +#include "src/__support/high_precision_decimal.h" +#include "src/__support/str_conv_utils.h" +#include "utils/CPP/Limits.h" +#include + +namespace __llvm_libc { +namespace internal { + +// Shifts right and rounds according to the following rules: +// 1) If the part being cut off is more than 2^(amountToShift - 1) then round +// up +// 2) If it is less than that number then round down +// 3) If it is exactly that number, then round so that the final number will be +// even +template +static inline T shiftRightAndRound(T numToShift, unsigned int amountToShift) { + T result = numToShift >> amountToShift; + T truncated = numToShift & ((1 << amountToShift) - 1); + + if (truncated < (1 << (amountToShift - 1))) { + return result; + } else if (truncated > (1 << (amountToShift - 1))) { + return result + 1; + } else { + return result + (result & 1); // This rounds towards even. + } +} + +template uint32_t leadingZeroes(T inputNumber) { + constexpr uint32_t bitsInT = sizeof(T) * 8; + if (inputNumber == 0) { + return bitsInT; + } + uint32_t curGuess = bitsInT / 2; + uint32_t rangeSize = bitsInT / 2; + // while either shifting by curGuess does not get rid of all of the bits or + // shifting by one less also gets rid of all of the bits then we have not + // found the first bit. + while (((inputNumber >> curGuess) > 0) || + ((inputNumber >> (curGuess - 1)) == 0)) { + // Binary search for the first set bit + rangeSize /= 2; + if (rangeSize == 0) { + break; + } + if ((inputNumber >> curGuess) > 0) { + curGuess += rangeSize; + } else { + curGuess -= rangeSize; + } + } + if (inputNumber >> curGuess > 0) { + curGuess++; + } + return bitsInT - curGuess; +} + +static inline uint64_t low64(__uint128_t num) { + return static_cast(num & 0xffffffffffffffff); +} + +static inline uint64_t high64(__uint128_t num) { + return static_cast(num >> 64); +} + +// This Eisel-Lemire implementation is based on the algorithm described in the +// paper Number Parsing at a Gigabyte per Second, Software: Practice and +// Experience 51 (8), 2021 (https://arxiv.org/abs/2101.11408), as well as the +// description by Nigel Tao +// (https://nigeltao.github.io/blog/2020/eisel-lemire.html) and the golang +// implementation, also by Nigel Tao +// (https://github.com/golang/go/blob/release-branch.go1.16/src/strconv/eisel_lemire.go#L25) +// for some optimizations as well as handling 32 bit floats. +template +static inline bool +eiselLemire(typename fputil::FPBits::UIntType mantissa, int32_t exp10, + typename fputil::FPBits::UIntType *outputMantissa, + uint32_t *outputExp2) { + + using BitsType = typename fputil::FPBits::UIntType; + constexpr uint32_t BITS_IN_MANTISSA = sizeof(mantissa) * 8; + + if (sizeof(T) > 8) { // This algorithm cannot handle anything longer than a + // double, so we skip straight to the fallback. + return false; + } + + // Exp10 Range + if (exp10 < DETAILED_POWERS_OF_TEN_MIN_EXP_10 || + exp10 > DETAILED_POWERS_OF_TEN_MAX_EXP_10) { + return false; + } + + // Normalization + uint32_t clz = leadingZeroes(mantissa); + mantissa <<= clz; + + uint32_t exp2 = exp10ToExp2(exp10) + BITS_IN_MANTISSA + + fputil::FloatProperties::exponentBias - clz; + + // Multiplication + const uint64_t *powerOfTen = + DETAILED_POWERS_OF_TEN[exp10 - DETAILED_POWERS_OF_TEN_MIN_EXP_10]; + + __uint128_t firstApprox = static_cast<__uint128_t>(mantissa) * + static_cast<__uint128_t>(powerOfTen[1]); + + // Wider Approximation + __uint128_t finalApprox; + // The halfway constant is used to check if the bits that will be shifted away + // intially are all 1. For doubles this is 64 (bitstype size) - 52 (final + // mantissa size) - 3 (we shift away the last two bits separately for + // accuracy, and the most significant bit is ignored.) = 9. Similarly, it's 6 + // for floats in this case. + const uint64_t halfwayConstant = sizeof(T) == 8 ? 0x1FF : 0x3F; + if ((high64(firstApprox) & halfwayConstant) == halfwayConstant && + low64(firstApprox) + mantissa < mantissa) { + __uint128_t lowBits = static_cast<__uint128_t>(mantissa) * + static_cast<__uint128_t>(powerOfTen[0]); + __uint128_t secondApprox = + firstApprox + static_cast<__uint128_t>(high64(lowBits)); + + if ((high64(secondApprox) & halfwayConstant) == halfwayConstant && + low64(secondApprox) + 1 == 0 && low64(lowBits) + mantissa < mantissa) { + return false; + } + finalApprox = secondApprox; + } else { + finalApprox = firstApprox; + } + + // Shifting to 54 bits for doubles and 25 bits for floats + BitsType msb = high64(finalApprox) >> (BITS_IN_MANTISSA - 1); + BitsType finalMantissa = + high64(finalApprox) >> (msb + BITS_IN_MANTISSA - + (fputil::FloatProperties::mantissaWidth + 3)); + exp2 -= 1 ^ msb; // same as !msb + + // Half-way ambiguity + if (low64(finalApprox) == 0 && (high64(finalApprox) & halfwayConstant) == 0 && + (finalMantissa & 3) == 1) { + return false; + } + + // From 54 to 53 bits for doubles and 25 to 24 bits for floats + finalMantissa += finalMantissa & 1; + finalMantissa >>= 1; + if ((finalMantissa >> (fputil::FloatProperties::mantissaWidth + 1)) > 0) { + finalMantissa >>= 1; + ++exp2; + } + + // The if block is equivalent to (but has fewer branches than): + // if exp2 <= 0 || exp2 >= 0x7FF { etc } + if (exp2 - 1 >= (1 << fputil::FloatProperties::exponentWidth) - 2) { + return false; + } + + *outputMantissa = finalMantissa; + *outputExp2 = exp2; + return true; +} + +// The nth item in POWERS_OF_TWO represents the greatest power of two less than +// 10^n. This tells us how much we can safely shift without overshooting. +constexpr uint8_t POWERS_OF_TWO[19] = { + 0, 3, 6, 9, 13, 16, 19, 23, 26, 29, 33, 36, 39, 43, 46, 49, 53, 56, 59, +}; +constexpr int32_t NUM_POWERS_OF_TWO = + sizeof(POWERS_OF_TWO) / sizeof(POWERS_OF_TWO[0]); + +// Takes a mantissa and base 10 exponent and converts it into its closest +// floating point type T equivalient. This is the fallback algorithm used when +// the Eisel-Lemire algorithm fails, it's slower but more accurate. It's based +// on the Simple Decimal Conversion algorithm by Nigel Tao, described at this +// link: https://nigeltao.github.io/blog/2020/parse-number-f64-simple.html +template +static inline void +simpleDecimalConversion(const char *__restrict numStart, + typename fputil::FPBits::UIntType *outputMantissa, + uint32_t *outputExp2) { + + int32_t exp2 = 0; + HighPrecsisionDecimal hpd = HighPrecsisionDecimal(numStart); + + if (hpd.getNumDigits() == 0) { + *outputMantissa = 0; + *outputExp2 = 0; + return; + } + + // If the exponent is too large and can't be represented in this size of + // float, return inf. + if (hpd.getDecimalPoint() > 0 && + exp10ToExp2(hpd.getDecimalPoint() - 1) > + static_cast(fputil::FloatProperties::exponentBias)) { + *outputMantissa = 0; + *outputExp2 = fputil::FPBits::maxExponent; + errno = ERANGE; // NOLINT + return; + } + // If the exponent is too small even for a subnormal, return 0. + if (hpd.getDecimalPoint() < 0 && + exp10ToExp2(-hpd.getDecimalPoint()) > + static_cast(fputil::FloatProperties::exponentBias + + fputil::FloatProperties::mantissaWidth)) { + *outputMantissa = 0; + *outputExp2 = 0; + errno = ERANGE; // NOLINT + return; + } + + // Right shift until the number is smaller than 1. + while (hpd.getDecimalPoint() > 0) { + int32_t shiftAmount = 0; + if (hpd.getDecimalPoint() >= NUM_POWERS_OF_TWO) { + shiftAmount = 60; + } else { + shiftAmount = POWERS_OF_TWO[hpd.getDecimalPoint()]; + } + exp2 += shiftAmount; + hpd.shift(-shiftAmount); + } + + // Left shift until the number is between 1/2 and 1 + while (hpd.getDecimalPoint() < 0 || + (hpd.getDecimalPoint() == 0 && hpd.getDigits()[0] < 5)) { + int32_t shiftAmount = 0; + + if (-hpd.getDecimalPoint() >= NUM_POWERS_OF_TWO) { + shiftAmount = 60; + } else if (hpd.getDecimalPoint() != 0) { + shiftAmount = POWERS_OF_TWO[-hpd.getDecimalPoint()]; + } else { // This handles the case of the number being between .1 and .5 + shiftAmount = 1; + } + exp2 -= shiftAmount; + hpd.shift(shiftAmount); + } + + // Left shift once so that the number is between 1 and 2 + --exp2; + hpd.shift(1); + + // Get the biased exponent + exp2 += fputil::FloatProperties::exponentBias; + + // Handle the exponent being too large (and return inf). + if (exp2 >= fputil::FPBits::maxExponent) { + *outputMantissa = 0; + *outputExp2 = fputil::FPBits::maxExponent; + errno = ERANGE; // NOLINT + return; + } + + // Shift left to fill the mantissa + hpd.shift(fputil::FloatProperties::mantissaWidth); + typename fputil::FPBits::UIntType finalMantissa = + hpd.roundToIntegerType::UIntType>(); + + // Handle subnormals + if (exp2 <= 0) { + // Shift right until there is a valid exponent + while (exp2 < 0) { + hpd.shift(-1); + ++exp2; + } + // Shift right one more time to compensate for the left shift to get it + // between 1 and 2. + hpd.shift(-1); + finalMantissa = + hpd.roundToIntegerType::UIntType>(); + + // Check if by shifting right we've caused this to round to a normal number. + if ((finalMantissa >> fputil::FloatProperties::mantissaWidth) != 0) { + ++exp2; + } + } + + // Check if rounding added a bit, and shift down if that's the case. + if (finalMantissa == typename fputil::FPBits::UIntType(2) + << fputil::FloatProperties::mantissaWidth) { + finalMantissa >>= 1; + ++exp2; + } + + *outputMantissa = finalMantissa; + *outputExp2 = exp2; +} + +// Takes a mantissa and base 10 exponent and converts it into its closest +// floating point type T equivalient. First we try the Eisel-Lemire algorithm, +// then if that fails then we fall back to a more accurate algorithm for +// accuracy. The resulting mantissa and exponent are placed in outputMantissa +// and outputExp2. +template +static inline void +decimalExpToFloat(typename fputil::FPBits::UIntType mantissa, int32_t exp10, + const char *__restrict numStart, bool truncated, + typename fputil::FPBits::UIntType *outputMantissa, + uint32_t *outputExp2) { + + // TODO: Implement Clinger's fast path, as well as other shortcuts here. + + // Try Eisel-Lemire + if (eiselLemire(mantissa, exp10, outputMantissa, outputExp2)) { + if (!truncated) { + return; + } + // If the mantissa is truncated, then the result may be off by the LSB, so + // check if rounding the mantissa up changes the result. If not, then it's + // safe, else use the fallback. + typename fputil::FPBits::UIntType firstMantissa = *outputMantissa; + uint32_t firstExp2 = *outputExp2; + if (eiselLemire(mantissa + 1, exp10, outputMantissa, outputExp2)) { + if (*outputMantissa == firstMantissa && *outputExp2 == firstExp2) { + return; + } + } + } + + simpleDecimalConversion(numStart, outputMantissa, outputExp2); + + return; +} + +// Takes a pointer to a string and a pointer to a string pointer. This function +// is used as the backend for all of the string to float functions. +template +static inline T strtofloatingpoint(const char *__restrict src, + char **__restrict strEnd) { + using BitsType = typename fputil::FPBits::UIntType; + fputil::FPBits result = fputil::FPBits(); + src = first_non_whitespace(src); + + if (*src == '+' || *src == '-') { + if (*src == '-') { + result.setSign(true); + } + ++src; + } + + static constexpr char DECIMAL_POINT = '.'; + static const char *INF_STRING = "infinity"; + static const char *NAN_STRING = "nan"; + + bool truncated = false; + + if (isdigit(*src) || *src == DECIMAL_POINT) { // regular number + int base = 10; + char exponentMarker = 'e'; + if (is_hex_start(src)) { + base = 16; + src += 2; + exponentMarker = 'p'; + } + const char *__restrict numStart = src; + bool afterDecimal = false; + + BitsType mantissa = 0; + int32_t exponent = 0; + + // The goal for the first step of parsing is to convert the number in src to + // the format mantissa * (base ^ exponent) + + constexpr BitsType MANTISSA_MAX = + BitsType(1) << (fputil::FloatProperties::mantissaWidth + + 1); // The extra bit is to give space for the implicit 1 + const BitsType BITSTYPE_MAX_DIV_BY_BASE = + __llvm_libc::cpp::NumericLimits::max() / base; + while ((isalnum(*src) || *src == DECIMAL_POINT) && + mantissa < BITSTYPE_MAX_DIV_BY_BASE) { + if (*src == DECIMAL_POINT && afterDecimal) { + break; // this means that *src points to a second decimal point, ending + // the number. + } else if (*src == DECIMAL_POINT) { + afterDecimal = true; + ++src; + continue; + } + int digit = b36_char_to_int(*src); + if (digit >= base) { + break; + } + + mantissa = (mantissa * base) + digit; + if (afterDecimal) { + --exponent; + } + + ++src; + } + + // The second loop is to run through the remaining digits after we've filled + // the mantissa. + while (isalnum(*src) || *src == DECIMAL_POINT) { + if (*src == DECIMAL_POINT && afterDecimal) { + break; // this means that *src points to a second decimal point, ending + // the number. + } else if (*src == DECIMAL_POINT) { + afterDecimal = true; + ++src; + continue; + } + int digit = b36_char_to_int(*src); + if (digit > base) { + break; + } + + if (digit > 0) { + truncated = true; + } + + if (!afterDecimal) { + exponent++; + } + + ++src; + } + + // if our base is 16 then convert the exponent to base 2 + if (base == 16) { + exponent *= 4; + } + + if ((*src | 32) == exponentMarker) { + if (*(src + 1) == '+' || *(src + 1) == '-' || isdigit(*(src + 1))) { + ++src; + char *tempStrEnd; + int32_t add_to_exponent = strtointeger(src, &tempStrEnd, 10); + src += tempStrEnd - src; + exponent += add_to_exponent; + } + } + + if (mantissa == 0) { // if we have a 0, then also 0 the exponent. + exponent = 0; + } else if (base == 16) { + + // These two loops should normalize the number if we assume the decimal + // point is after the bit at mantissaWidth. + // For example if type T is a 32 bit float, this should result in a + // mantissa with its most significant 1 being at bit 23. + while (mantissa < (MANTISSA_MAX >> 1)) { + mantissa = mantissa << 1; + --exponent; + } + BitsType mantissaCopy = mantissa; + unsigned int amountToShift = 0; + while (mantissaCopy > MANTISSA_MAX) { + mantissaCopy = mantissaCopy >> 1; + ++amountToShift; + } + exponent += amountToShift; + mantissa = shiftRightAndRound(mantissa, amountToShift); + + // Account for the fact that the mantissa represented an integer + // previously, but now represents the fractional part of a normalized + // number. + exponent += fputil::FloatProperties::mantissaWidth; + + int32_t biasedExponent = exponent + fputil::FPBits::exponentBias; + if (biasedExponent <= 0) { + // handle subnormals here + + // the most mantissa is currently normalized, meaning that the msb is + // one bit left of where the decimal point should go. + amountToShift = 1; + mantissaCopy = mantissa >> 1; + while (biasedExponent < 0 && mantissaCopy > 0) { + mantissaCopy = mantissaCopy >> 1; + ++amountToShift; + ++biasedExponent; + } + // If we cut off any bits to fit this number into a subnormal, then it's + // out of range for this size of float. + if ((mantissa & ((1 << amountToShift) - 1)) > 0) { + errno = ERANGE; // NOLINT + } + mantissa = shiftRightAndRound(mantissa, amountToShift); + if (mantissa == 0) { + biasedExponent = 0; + } + } else if (biasedExponent > result.maxExponent) { + // This indicates an overflow, so we make the result INF and set errno. + biasedExponent = result.maxExponent; + mantissa = 0; + errno = ERANGE; // NOLINT + } + + result.setUnbiasedExponent(biasedExponent); + result.setMantissa(mantissa); + } else { // base is 10 + BitsType outputMantissa = 0; + uint32_t outputExponent = 0; + decimalExpToFloat(mantissa, exponent, numStart, truncated, + &outputMantissa, &outputExponent); + result.setMantissa(outputMantissa); + result.setUnbiasedExponent(outputExponent); + } + + } else if ((*src | 32) == 'n') { // NaN + if ((src[1] | 32) == NAN_STRING[1] && (src[2] | 32) == NAN_STRING[2]) { + src += 3; + BitsType NaNMantissa = 0; + if (*src == '(') { + char *tempSrc = 0; + if (isdigit(*(src + 1)) || *(src + 1) == ')') { + NaNMantissa = strtointeger(src + 1, &tempSrc, 0); + if (*tempSrc != ')') { + NaNMantissa = 0; + } else { + src = tempSrc + 1; + } + } + } + NaNMantissa |= fputil::FloatProperties::quietNaNMask; + if (result.getSign()) { + result = fputil::FPBits(result.buildNaN(NaNMantissa)); + result.setSign(true); + } else { + result.setSign(false); + result = fputil::FPBits(result.buildNaN(NaNMantissa)); + } + } + } else if ((*src | 32) == 'i') { // INF + if ((src[1] | 32) == INF_STRING[1] && (src[2] | 32) == INF_STRING[2]) { + if (result.getSign()) + result = result.negInf(); + else + result = result.inf(); + if ((src[3] | 32) == INF_STRING[3] && (src[4] | 32) == INF_STRING[4] && + (src[5] | 32) == INF_STRING[5] && (src[6] | 32) == INF_STRING[6] && + (src[7] | 32) == INF_STRING[7]) { + // if the string is "INFINITY" then strEnd needs to be set to src + 8. + src += 8; + } else { + src += 3; + } + } + } + + if (strEnd != nullptr) + *strEnd = const_cast(src); + + return T(result); +} + +} // namespace internal +} // namespace __llvm_libc + +#endif // LIBC_SRC_SUPPORT_STR_TO_FLOAT_H diff --git a/libc/src/stdlib/CMakeLists.txt b/libc/src/stdlib/CMakeLists.txt --- a/libc/src/stdlib/CMakeLists.txt +++ b/libc/src/stdlib/CMakeLists.txt @@ -8,6 +8,16 @@ libc.src.__support.str_conv_utils ) +add_entrypoint_object( + atof + SRCS + atof.cpp + HDRS + atof.h + DEPENDS + libc.src.__support.str_conv_utils +) + add_entrypoint_object( atol SRCS @@ -28,6 +38,26 @@ libc.src.__support.str_conv_utils ) +add_entrypoint_object( + strtof + SRCS + strtof.cpp + HDRS + strtof.h + DEPENDS + libc.src.__support.str_conv_utils +) + +add_entrypoint_object( + strtod + SRCS + strtod.cpp + HDRS + strtod.h + DEPENDS + libc.src.__support.str_conv_utils +) + add_entrypoint_object( strtol SRCS diff --git a/libc/src/stdlib/atof.h b/libc/src/stdlib/atof.h new file mode 100644 --- /dev/null +++ b/libc/src/stdlib/atof.h @@ -0,0 +1,18 @@ +//===-- Implementation header for atof --------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_LIBC_SRC_STDLIB_ATOF_H +#define LLVM_LIBC_SRC_STDLIB_ATOF_H + +namespace __llvm_libc { + +double atof(const char *str); + +} // namespace __llvm_libc + +#endif // LLVM_LIBC_SRC_STDLIB_ATOI_H diff --git a/libc/src/stdlib/atof.cpp b/libc/src/stdlib/atof.cpp new file mode 100644 --- /dev/null +++ b/libc/src/stdlib/atof.cpp @@ -0,0 +1,19 @@ +//===-- Implementation of atof --------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "src/stdlib/atof.h" +#include "src/__support/common.h" +#include "src/__support/str_to_float.h" + +namespace __llvm_libc { + +LLVM_LIBC_FUNCTION(double, atof, (const char *str)) { + return internal::strtofloatingpoint(str, nullptr); +} + +} // namespace __llvm_libc diff --git a/libc/src/stdlib/strtod.h b/libc/src/stdlib/strtod.h new file mode 100644 --- /dev/null +++ b/libc/src/stdlib/strtod.h @@ -0,0 +1,18 @@ +//===-- Implementation header for strtod ------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_LIBC_SRC_STDLIB_STRTOD_H +#define LLVM_LIBC_SRC_STDLIB_STRTOD_H + +namespace __llvm_libc { + +double strtod(const char *__restrict str, char **__restrict str_end); + +} // namespace __llvm_libc + +#endif // LLVM_LIBC_SRC_STDLIB_STRTOD_H diff --git a/libc/src/stdlib/strtod.cpp b/libc/src/stdlib/strtod.cpp new file mode 100644 --- /dev/null +++ b/libc/src/stdlib/strtod.cpp @@ -0,0 +1,20 @@ +//===-- Implementation of strtod ------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "src/stdlib/strtod.h" +#include "src/__support/common.h" +#include "src/__support/str_to_float.h" + +namespace __llvm_libc { + +LLVM_LIBC_FUNCTION(double, strtod, + (const char *__restrict str, char **__restrict str_end)) { + return internal::strtofloatingpoint(str, str_end); +} + +} // namespace __llvm_libc diff --git a/libc/src/stdlib/strtof.h b/libc/src/stdlib/strtof.h new file mode 100644 --- /dev/null +++ b/libc/src/stdlib/strtof.h @@ -0,0 +1,18 @@ +//===-- Implementation header for strtof ------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_LIBC_SRC_STDLIB_STRTOF_H +#define LLVM_LIBC_SRC_STDLIB_STRTOF_H + +namespace __llvm_libc { + +float strtof(const char *__restrict str, char **__restrict str_end); + +} // namespace __llvm_libc + +#endif // LLVM_LIBC_SRC_STDLIB_STRTOF_H diff --git a/libc/src/stdlib/strtof.cpp b/libc/src/stdlib/strtof.cpp new file mode 100644 --- /dev/null +++ b/libc/src/stdlib/strtof.cpp @@ -0,0 +1,20 @@ +//===-- Implementation of strtof ------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "src/stdlib/strtof.h" +#include "src/__support/common.h" +#include "src/__support/str_to_float.h" + +namespace __llvm_libc { + +LLVM_LIBC_FUNCTION(float, strtof, + (const char *__restrict str, char **__restrict str_end)) { + return internal::strtofloatingpoint(str, str_end); +} + +} // namespace __llvm_libc diff --git a/libc/test/src/__support/CMakeLists.txt b/libc/test/src/__support/CMakeLists.txt --- a/libc/test/src/__support/CMakeLists.txt +++ b/libc/test/src/__support/CMakeLists.txt @@ -19,3 +19,32 @@ DEPENDS libc.src.__support.high_precision_decimal ) + +add_libc_unittest( + str_to_float_test + SUITE + libc_support_unittests + SRCS + str_to_float_test.cpp + DEPENDS + libc.src.__support.str_conv_utils +) + +add_executable( + libc_str_to_float_comparison_test + str_to_float_comparison_test.cpp +) + +target_link_libraries(libc_str_to_float_comparison_test + PRIVATE + llvmlibc +) + +set(float_test_file ${CMAKE_CURRENT_SOURCE_DIR}/str_to_float_comparison_data.txt) + +add_custom_command(TARGET libc_str_to_float_comparison_test + POST_BUILD + COMMAND $ ${float_test_file} + DEPENDS ${float_test_file} + COMMENT "Test the strtof and strtod implementations against precomputed results." + VERBATIM) diff --git a/libc/test/src/__support/str_to_float_comparison_data.txt b/libc/test/src/__support/str_to_float_comparison_data.txt new file mode 100644 --- /dev/null +++ b/libc/test/src/__support/str_to_float_comparison_data.txt @@ -0,0 +1,7 @@ +# This is the sample data from https://github.com/nigeltao/parse-number-fxx-test-data +3C00 3F800000 3FF0000000000000 1 +3D00 3FA00000 3FF4000000000000 1.25 +3D9A 3FB33333 3FF6666666666666 1.4 +57B7 42F6E979 405EDD2F1A9FBE77 123.456 +622A 44454000 4088A80000000000 789 +7C00 7F800000 7FF0000000000000 123.456e789 diff --git a/libc/test/src/__support/str_to_float_comparison_test.cpp b/libc/test/src/__support/str_to_float_comparison_test.cpp new file mode 100644 --- /dev/null +++ b/libc/test/src/__support/str_to_float_comparison_test.cpp @@ -0,0 +1,173 @@ +//===-- strtofloatingpoint comparison test --------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// #include "src/__support/str_float_conv_utils.h" + +#include + +// #include "src/__support/FPUtil/FPBits.h" + +#include +#include +#include + +// The intent of this test is to read in files in the format used in this test +// dataset: https://github.com/nigeltao/parse-number-fxx-test-data +// The format is as follows: +// Hexadecimal representations of IEEE754 floats in 16 bits, 32 bits, and 64 +// bits, then the string that matches to them. + +// 3C00 3F800000 3FF0000000000000 1.0 + +// By default, float_comp_in.txt is used as the test set, but once built this +// file can be run against the larger test set. To do that, clone the repository +// with the dataset, then navigate to the compiled binary of this file (it +// should be in llvm_project/build/bin). Run the following command: +// ./libc_str_to_float_comparison_test /data/* +// It will take a few seconds to run. + +static inline uint32_t hexToUInt(char in) { + return in > '9' ? in + 10 - 'A' : in - '0'; +} + +// Fast because it assumes inStr points to exactly 8 uppercase hex chars +static inline uint32_t fastHexToUInt(const char *inStr) { + uint32_t result = 0; + result = (hexToUInt(inStr[0]) << 28) + (hexToUInt(inStr[1]) << 24) + + (hexToUInt(inStr[2]) << 20) + (hexToUInt(inStr[3]) << 16) + + (hexToUInt(inStr[4]) << 12) + (hexToUInt(inStr[5]) << 8) + + (hexToUInt(inStr[6]) << 4) + hexToUInt(inStr[7]); + return result; +} + +// Fast because it assumes inStr points to exactly 8 uppercase hex chars +static inline uint64_t fastHexToULLong(const char *inStr) { + uint64_t result = 0; + result = (static_cast(fastHexToUInt(inStr)) << 32) + + fastHexToUInt(inStr + 8); + return result; +} + +int checkFile(char *inputFileName, int *totalFails, int *totalBitDiffs, + int *detailedBitDiffs, int *total) { + int32_t curFails = 0; // Only counts actual failures, not bitdiffs. + int32_t curBitDiffs = 0; // A bitdiff is when the expected result and actual + // result are off by +/- 1 bit. + std::string line; + std::string num; + + std::ifstream fileStream(inputFileName, std::ifstream::in); + + if (!fileStream.is_open()) { + std::cout << "file '" << inputFileName << "' failed to open. Exiting.\n"; + return 1; + } + while (getline(fileStream, line)) { + if (line[0] == '#') { + continue; + } + *total = *total + 1; + // uint16_t expectedFloat16Raw; + uint32_t expectedFloatRaw; + uint64_t expectedDoubleRaw; + + expectedFloatRaw = fastHexToUInt(line.c_str() + 5); + expectedDoubleRaw = fastHexToULLong(line.c_str() + 14); + num = line.substr(31); + + float floatResult = strtof(num.c_str(), nullptr); + + double doubleResult = strtod(num.c_str(), nullptr); + + uint32_t floatRaw = *(uint32_t *)(&floatResult); + + uint64_t doubleRaw = *(uint64_t *)(&doubleResult); + + if (!(expectedFloatRaw == floatRaw)) { + if (expectedFloatRaw == floatRaw + 1 || + expectedFloatRaw == floatRaw - 1) { + curBitDiffs++; + if (expectedFloatRaw == floatRaw + 1) { + detailedBitDiffs[0] = detailedBitDiffs[0] + 1; // float low + } else { + detailedBitDiffs[1] = detailedBitDiffs[1] + 1; // float high + } + } else { + curFails++; + } + if (curFails + curBitDiffs < 10) { + std::cout << "Float fail for '" << num << "'. Expected " << std::hex + << expectedFloatRaw << " but got " << floatRaw << "\n" + << std::dec; + } + } + + if (!(expectedDoubleRaw == doubleRaw)) { + if (expectedDoubleRaw == doubleRaw + 1 || + expectedDoubleRaw == doubleRaw - 1) { + curBitDiffs++; + if (expectedDoubleRaw == doubleRaw + 1) { + detailedBitDiffs[2] = detailedBitDiffs[2] + 1; // double low + } else { + detailedBitDiffs[3] = detailedBitDiffs[3] + 1; // double high + } + } else { + curFails++; + } + if (curFails + curBitDiffs < 10) { + std::cout << "Double fail for '" << num << "'. Expected " << std::hex + << expectedDoubleRaw << " but got " << doubleRaw << "\n" + << std::dec; + } + } + } + + fileStream.close(); + + *totalBitDiffs += curBitDiffs; + *totalFails += curFails; + + if (curFails > 1 || curBitDiffs > 1) { + return 2; + } + return 0; +} + +int main(int argc, char *argv[]) { + int result = 0; + int fails = 0; + + // Bitdiffs are cases where the expected result and actual result only differ + // by +/- the least significant bit. They are tracked seperately from larger + // failures since a bitdiff is most likely the result of a rounding error, and + // is unlikely to cause real world problems. + int bitdiffs = 0; + int detailedBitDiffs[4] = {0, 0, 0, 0}; + + int total = 0; + for (int i = 1; i < argc; i++) { + std::cout << "Starting file " << argv[i] << "\n"; + int curResult = + checkFile(argv[i], &fails, &bitdiffs, detailedBitDiffs, &total); + if (curResult == 1) { + result = 1; + break; + } else if (curResult == 2) { + result = 2; + } + } + std::cout << "Results:\n" + << "Total significant failed conversions: " << fails << "\n" + << "Total conversions off by +/- 1 bit: " << bitdiffs << "\n" + << "\t" << detailedBitDiffs[0] << "\tfloat low\n" + << "\t" << detailedBitDiffs[1] << "\tfloat high\n" + << "\t" << detailedBitDiffs[2] << "\tdouble low\n" + << "\t" << detailedBitDiffs[3] << "\tdouble high\n" + << "Total lines: " << total << "\n"; + return result; +} diff --git a/libc/test/src/__support/str_to_float_test.cpp b/libc/test/src/__support/str_to_float_test.cpp new file mode 100644 --- /dev/null +++ b/libc/test/src/__support/str_to_float_test.cpp @@ -0,0 +1,200 @@ +//===-- Unittests for str_to_float ----------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "src/__support/FPUtil/FPBits.h" +#include "src/__support/str_to_float.h" + +#include "utils/UnitTest/Test.h" + +class LlvmLibcStrToFloatTest : public __llvm_libc::testing::Test { +public: + template + void EiselLemireTest( + const typename __llvm_libc::fputil::FPBits::UIntType inputMantissa, + const int32_t inputExp10, + const typename __llvm_libc::fputil::FPBits::UIntType + expectedOutputMantissa, + const uint32_t expectedOutputExp2) { + typename __llvm_libc::fputil::FPBits::UIntType actualOutputMantissa = 0; + uint32_t actualOutputExp2 = 0; + + ASSERT_TRUE(__llvm_libc::internal::eiselLemire( + inputMantissa, inputExp10, &actualOutputMantissa, &actualOutputExp2)); + EXPECT_EQ(actualOutputMantissa, expectedOutputMantissa); + EXPECT_EQ(actualOutputExp2, expectedOutputExp2); + } + + template + void SimpleDecimalConversionTest( + const char *__restrict numStart, + const typename __llvm_libc::fputil::FPBits::UIntType + expectedOutputMantissa, + const uint32_t expectedOutputExp2, const int expectedErrno = 0) { + typename __llvm_libc::fputil::FPBits::UIntType actualOutputMantissa = 0; + uint32_t actualOutputExp2 = 0; + errno = 0; + + __llvm_libc::internal::simpleDecimalConversion( + numStart, &actualOutputMantissa, &actualOutputExp2); + EXPECT_EQ(actualOutputMantissa, expectedOutputMantissa); + EXPECT_EQ(actualOutputExp2, expectedOutputExp2); + EXPECT_EQ(errno, expectedErrno); + } +}; + +TEST(LlvmLibcStrToFloatTest, LeadingZeroes) { + uint64_t testNum64 = 1; + uint32_t numOfZeroes = 63; + EXPECT_EQ(__llvm_libc::internal::leadingZeroes(0), 64u); + for (; numOfZeroes < 64; testNum64 <<= 1, numOfZeroes--) { + EXPECT_EQ(__llvm_libc::internal::leadingZeroes(testNum64), + numOfZeroes); + } + + testNum64 = 3; + numOfZeroes = 62; + for (; numOfZeroes > 63; testNum64 <<= 1, numOfZeroes--) { + EXPECT_EQ(__llvm_libc::internal::leadingZeroes(testNum64), + numOfZeroes); + } + + EXPECT_EQ(__llvm_libc::internal::leadingZeroes(0xffffffffffffffff), + 0u); + + testNum64 = 1; + numOfZeroes = 63; + for (; numOfZeroes > 63; testNum64 = (testNum64 << 1) + 1, numOfZeroes--) { + EXPECT_EQ(__llvm_libc::internal::leadingZeroes(testNum64), + numOfZeroes); + } + + uint64_t testNum32 = 1; + numOfZeroes = 31; + EXPECT_EQ(__llvm_libc::internal::leadingZeroes(0), 32u); + for (; numOfZeroes < 32; testNum32 <<= 1, numOfZeroes--) { + EXPECT_EQ(__llvm_libc::internal::leadingZeroes(testNum32), + numOfZeroes); + } + + EXPECT_EQ(__llvm_libc::internal::leadingZeroes(0xffffffff), 0u); +} + +TEST_F(LlvmLibcStrToFloatTest, EiselLemireFloat64Simple) { + EiselLemireTest(12345678901234567890u, 1, 0x1AC53A7E04BCDA, 1089); + EiselLemireTest(123, 0, 0x1EC00000000000, 1029); + EiselLemireTest(12345678901234568192u, 0, 0x156A95319D63E2, 1086); +} + +TEST_F(LlvmLibcStrToFloatTest, EiselLemireFloat64SpecificFailures) { + // These test cases have caused failures in the past. + EiselLemireTest(358416272, -33, 0x1BBB2A68C9D0B9, 941); + EiselLemireTest(2166568064000000238u, -9, 0x10246690000000, 1054); + EiselLemireTest(2794967654709307187u, 1, 0x183e132bc608c8, 1087); + EiselLemireTest(2794967654709307188u, 1, 0x183e132bc608c9, 1087); +} + +TEST_F(LlvmLibcStrToFloatTest, EiselLemireFallbackStates) { + // Check the fallback states for the algorithm: + uint32_t floatOutputMantissa = 0; + uint64_t doubleOutputMantissa = 0; + __uint128_t tooLongMantissa = 0; + uint32_t outputExp2 = 0; + + // This Eisel-Lemire implementation doesn't support long doubles yet. + ASSERT_FALSE(__llvm_libc::internal::eiselLemire( + tooLongMantissa, 0, &tooLongMantissa, &outputExp2)); + + // This number can't be evaluated by Eisel-Lemire since it's exactly 1024 away + // from both of its closest floating point approximations + // (12345678901234548736 and 12345678901234550784) + ASSERT_FALSE(__llvm_libc::internal::eiselLemire( + 12345678901234549760u, 0, &doubleOutputMantissa, &outputExp2)); + + ASSERT_FALSE(__llvm_libc::internal::eiselLemire( + 20040229, 0, &floatOutputMantissa, &outputExp2)); +} + +TEST_F(LlvmLibcStrToFloatTest, SimpleDecimalConversion64BasicWholeNumbers) { + SimpleDecimalConversionTest("123456789012345678900", 0x1AC53A7E04BCDA, + 1089); + SimpleDecimalConversionTest("123", 0x1EC00000000000, 1029); + SimpleDecimalConversionTest("12345678901234549760", 0x156A95319D63D8, + 1086); +} + +TEST_F(LlvmLibcStrToFloatTest, SimpleDecimalConversion64BasicDecimals) { + SimpleDecimalConversionTest("1.2345", 0x13c083126e978d, 1023); + SimpleDecimalConversionTest(".2345", 0x1e04189374bc6a, 1020); + SimpleDecimalConversionTest(".299792458", 0x132fccb4aca314, 1021); +} + +TEST_F(LlvmLibcStrToFloatTest, SimpleDecimalConversion64BasicExponents) { + SimpleDecimalConversionTest("1e10", 0x12a05f20000000, 1056); + SimpleDecimalConversionTest("1e-10", 0x1b7cdfd9d7bdbb, 989); + SimpleDecimalConversionTest("1e300", 0x17e43c8800759c, 2019); + SimpleDecimalConversionTest("1e-300", 0x156e1fc2f8f359, 26); +} + +TEST_F(LlvmLibcStrToFloatTest, SimpleDecimalConversion64BasicSubnormals) { + SimpleDecimalConversionTest("1e-320", 0x7e8, 0); + SimpleDecimalConversionTest("1e-308", 0x730d67819e8d2, 0); + SimpleDecimalConversionTest("2.9e-308", 0x14da6df5e4bcc8, 1); +} + +TEST_F(LlvmLibcStrToFloatTest, SimpleDecimalConversion64SubnormalRounding) { + + // Technically you can keep adding digits until you hit the truncation limit, + // but this is the shortest string that results in the maximum subnormal that + // I found. + SimpleDecimalConversionTest("2.225073858507201e-308", 0xfffffffffffff, + 0); + + // Same here, if you were to extend the max subnormal out for another 800 + // digits, incrementing any one of those digits would create a normal number. + SimpleDecimalConversionTest("2.2250738585072012e-308", + 0x10000000000000, 1); +} + +TEST_F(LlvmLibcStrToFloatTest, SimpleDecimalConversion32SpecificFailures) { + SimpleDecimalConversionTest( + "1.4012984643248170709237295832899161312802619418765e-45", 0x1, 0); +} + +TEST(LlvmLibcStrToFloatTest, SimpleDecimalConversionExtraTypes) { + uint32_t floatOutputMantissa = 0; + uint32_t outputExp2 = 0; + + errno = 0; + __llvm_libc::internal::simpleDecimalConversion( + "123456789012345678900", &floatOutputMantissa, &outputExp2); + EXPECT_EQ(floatOutputMantissa, uint32_t(0xd629d4)); + EXPECT_EQ(outputExp2, uint32_t(193)); + EXPECT_EQ(errno, 0); + + uint64_t doubleOutputMantissa = 0; + outputExp2 = 0; + + errno = 0; + __llvm_libc::internal::simpleDecimalConversion( + "123456789012345678900", &doubleOutputMantissa, &outputExp2); + EXPECT_EQ(doubleOutputMantissa, uint64_t(0x1AC53A7E04BCDA)); + EXPECT_EQ(outputExp2, uint32_t(1089)); + EXPECT_EQ(errno, 0); + + // TODO(michaelrj): Get long double support working. + + // __uint128_t longDoubleOutputMantissa = 0; + // outputExp2 = 0; + + // errno = 0; + // __llvm_libc::internal::simpleDecimalConversion( + // "123456789012345678900", &longDoubleOutputMantissa, &outputExp2); + // EXPECT_EQ(longDoubleOutputMantissa, __uint128_t(0x1AC53A7E04BCDA)); + // EXPECT_EQ(outputExp2, uint32_t(1089)); + // EXPECT_EQ(errno, 0); +} diff --git a/libc/test/src/stdlib/CMakeLists.txt b/libc/test/src/stdlib/CMakeLists.txt --- a/libc/test/src/stdlib/CMakeLists.txt +++ b/libc/test/src/stdlib/CMakeLists.txt @@ -1,5 +1,15 @@ add_libc_testsuite(libc_stdlib_unittests) +add_libc_unittest( + atof_test + SUITE + libc_stdlib_unittests + SRCS + atof_test.cpp + DEPENDS + libc.src.stdlib.atof +) + add_libc_unittest( atoi_test SUITE @@ -30,6 +40,26 @@ libc.src.stdlib.atoll ) +add_libc_unittest( + strtod_test + SUITE + libc_stdlib_unittests + SRCS + strtod_test.cpp + DEPENDS + libc.src.stdlib.strtod +) + +add_libc_unittest( + strtof_test + SUITE + libc_stdlib_unittests + SRCS + strtof_test.cpp + DEPENDS + libc.src.stdlib.strtof +) + add_libc_unittest( strtol_test SUITE diff --git a/libc/test/src/stdlib/atof_test.cpp b/libc/test/src/stdlib/atof_test.cpp new file mode 100644 --- /dev/null +++ b/libc/test/src/stdlib/atof_test.cpp @@ -0,0 +1,35 @@ +//===-- Unittests for atof ------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "src/__support/FPUtil/FPBits.h" +#include "src/stdlib/atof.h" + +#include "utils/UnitTest/Test.h" + +#include +#include +#include + +// This is just a simple test to make sure that this function works at all. It's +// functionally identical to strtod so the bulk of the testing is there. +TEST(LlvmLibcAToFTest, SimpleTest) { + __llvm_libc::fputil::FPBits expectedFP = + __llvm_libc::fputil::FPBits(uint64_t(0x405ec00000000000)); + + errno = 0; + double result = __llvm_libc::atof("123"); + + __llvm_libc::fputil::FPBits actualFP = + __llvm_libc::fputil::FPBits(result); + + EXPECT_EQ(actualFP.bits, expectedFP.bits); + EXPECT_EQ(actualFP.getSign(), expectedFP.getSign()); + EXPECT_EQ(actualFP.getExponent(), expectedFP.getExponent()); + EXPECT_EQ(actualFP.getMantissa(), expectedFP.getMantissa()); + EXPECT_EQ(errno, 0); +} diff --git a/libc/test/src/stdlib/strtod_test.cpp b/libc/test/src/stdlib/strtod_test.cpp new file mode 100644 --- /dev/null +++ b/libc/test/src/stdlib/strtod_test.cpp @@ -0,0 +1,78 @@ +//===-- Unittests for strtod ---------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "src/__support/FPUtil/FPBits.h" +#include "src/stdlib/strtod.h" + +#include "utils/UnitTest/Test.h" + +#include +#include +#include + +class LlvmLibcStrToDTest : public __llvm_libc::testing::Test { +public: + void runTest(const char *inputString, const ptrdiff_t expectedStrLen, + const uint64_t expectedRawData, const int expectedErrno = 0) { + // expectedRawData is the expected double result as a uint64_t, organized + // according to IEEE754: + // + // +-- 1 Sign Bit +-- 52 Mantissa bits + // | | + // | +-------------------------+------------------------+ + // | | | + // SEEEEEEEEEEEMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM + // | | + // +----+----+ + // | + // +-- 11 Exponent Bits + // + // This is so that the result can be compared in parts. + char *strEnd = nullptr; + + __llvm_libc::fputil::FPBits expectedFP = + __llvm_libc::fputil::FPBits(expectedRawData); + + errno = 0; + double result = __llvm_libc::strtod(inputString, &strEnd); + + __llvm_libc::fputil::FPBits actualFP = + __llvm_libc::fputil::FPBits(result); + + EXPECT_EQ(strEnd - inputString, expectedStrLen); + + EXPECT_EQ(actualFP.bits, expectedFP.bits); + EXPECT_EQ(actualFP.getSign(), expectedFP.getSign()); + EXPECT_EQ(actualFP.getExponent(), expectedFP.getExponent()); + EXPECT_EQ(actualFP.getMantissa(), expectedFP.getMantissa()); + EXPECT_EQ(errno, expectedErrno); + } +}; + +TEST_F(LlvmLibcStrToDTest, SimpleTest) { + runTest("123", 3, uint64_t(0x405ec00000000000)); + + // This should fail on Eisel-Lemire, forcing a fallback to simple decimal + // conversion. + runTest("12345678901234549760", 20, uint64_t(0x43e56a95319d63d8)); + + // Found while looking for difficult test cases here: + // https://github.com/nigeltao/parse-number-fxx-test-data/blob/main/more-test-cases/golang-org-issue-36657.txt + runTest("1090544144181609348835077142190", 31, uint64_t(0x462b8779f2474dfb)); + + runTest("0x123", 5, uint64_t(0x4072300000000000)); +} + +// These are tests that have caused problems in the past. +TEST_F(LlvmLibcStrToDTest, SpecificFailures) { + runTest("3E70000000000000", 16, uint64_t(0x7FF0000000000000), ERANGE); + runTest("358416272e-33", 13, uint64_t(0x3adbbb2a68c9d0b9)); + runTest("2.16656806400000023841857910156251e9", 36, + uint64_t(0x41e0246690000001)); + runTest("27949676547093071875", 20, uint64_t(0x43f83e132bc608c9)); +} diff --git a/libc/test/src/stdlib/strtof_test.cpp b/libc/test/src/stdlib/strtof_test.cpp new file mode 100644 --- /dev/null +++ b/libc/test/src/stdlib/strtof_test.cpp @@ -0,0 +1,158 @@ +//===-- Unittests for strtof ---------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "src/__support/FPUtil/FPBits.h" +#include "src/stdlib/strtof.h" + +#include "utils/UnitTest/Test.h" + +#include +#include +#include + +class LlvmLibcStrToFTest : public __llvm_libc::testing::Test { +public: + void runTest(const char *inputString, const ptrdiff_t expectedStrLen, + const uint32_t expectedRawData, const int expectedErrno = 0) { + // expectedRawData is the expected float result as a uint32_t, organized + // according to IEEE754: + // + // +-- 1 Sign Bit +-- 23 Mantissa bits + // | | + // | +----------+----------+ + // | | | + // SEEEEEEEEMMMMMMMMMMMMMMMMMMMMMMM + // | | + // +--+---+ + // | + // +-- 8 Exponent Bits + // + // This is so that the result can be compared in parts. + char *strEnd = nullptr; + + __llvm_libc::fputil::FPBits expectedFP = + __llvm_libc::fputil::FPBits(expectedRawData); + + errno = 0; + float result = __llvm_libc::strtof(inputString, &strEnd); + + __llvm_libc::fputil::FPBits actualFP = + __llvm_libc::fputil::FPBits(result); + + EXPECT_EQ(strEnd - inputString, expectedStrLen); + + EXPECT_EQ(actualFP.bits, expectedFP.bits); + EXPECT_EQ(actualFP.getSign(), expectedFP.getSign()); + EXPECT_EQ(actualFP.getExponent(), expectedFP.getExponent()); + EXPECT_EQ(actualFP.getMantissa(), expectedFP.getMantissa()); + EXPECT_EQ(errno, expectedErrno); + } +}; + +// This is the set of tests that I have working (verified correct when compared +// to system libc). This is here so I don't break more things when I try to fix +// them. + +TEST_F(LlvmLibcStrToFTest, BasicDecimalTests) { + runTest("1", 1, 0x3f800000); + runTest("123", 3, 0x42f60000); + runTest("1234567890", 10, 0x4e932c06u); + runTest("123456789012345678901", 21, 0x60d629d4); + runTest("0.1", 3, 0x3dcccccdu); + runTest(".1", 2, 0x3dcccccdu); + runTest("-0.123456789", 12, 0xbdfcd6eau); + runTest("0.11111111111111111111", 22, 0x3de38e39u); + runTest("0.0000000000000000000000001", 27, 0x15f79688u); +} + +TEST_F(LlvmLibcStrToFTest, DecimalOutOfRangeTests) { + runTest("555E36", 6, 0x7f800000, ERANGE); + runTest("1e-10000", 8, 0x0, ERANGE); +} + +TEST_F(LlvmLibcStrToFTest, DecimalsWithRoundingProblems) { + runTest("20040229", 8, 0x4b98e512); + runTest("20040401", 8, 0x4b98e568); + runTest("9E9", 3, 0x50061c46); +} + +TEST_F(LlvmLibcStrToFTest, DecimalSubnormals) { + runTest("1.4012984643248170709237295832899161312802619418765e-45", 55, 0x1); +} + +TEST_F(LlvmLibcStrToFTest, DecimalWithLongExponent) { + runTest("1e2147483648", 12, 0x7f800000, ERANGE); + runTest("1e2147483646", 12, 0x7f800000, ERANGE); + runTest("100e2147483646", 14, 0x7f800000, ERANGE); + runTest("1e-2147483647", 13, 0x0, ERANGE); + runTest("1e-2147483649", 13, 0x0, ERANGE); +} + +TEST_F(LlvmLibcStrToFTest, BasicHexadecimalTests) { + runTest("0x1", 3, 0x3f800000); + runTest("0x10", 4, 0x41800000); + runTest("0x11", 4, 0x41880000); + runTest("0x0.1234", 8, 0x3d91a000); +} + +TEST_F(LlvmLibcStrToFTest, HexadecimalSubnormalTests) { + runTest("0x0.0000000000000000000000000000000002", 38, 0x4000); + + // This is the largest subnormal number as represented in hex + runTest("0x0.00000000000000000000000000000003fffff8", 42, 0x7fffff); +} + +TEST_F(LlvmLibcStrToFTest, HexadecimalSubnormalRoundingTests) { + // This is the largest subnormal number that gets rounded down to 0 (as a + // float) + runTest("0x0.00000000000000000000000000000000000004", 42, 0x0, ERANGE); + + // This is slightly larger, and thus rounded up + runTest("0x0.000000000000000000000000000000000000041", 43, 0x00000001, + ERANGE); + + // These check that we're rounding to even properly + runTest("0x0.0000000000000000000000000000000000000b", 42, 0x00000001, ERANGE); + runTest("0x0.0000000000000000000000000000000000000c", 42, 0x00000002, ERANGE); +} + +TEST_F(LlvmLibcStrToFTest, HexadecimalNormalRoundingTests) { + // This also checks the round to even behavior by checking three adjacent + // numbers. + // This gets rounded down to even + runTest("0x123456500", 11, 0x4f91a2b2); + // This doesn't get rounded at all + runTest("0x123456600", 11, 0x4f91a2b3); + // This gets rounded up to even + runTest("0x123456700", 11, 0x4f91a2b4); +} + +TEST_F(LlvmLibcStrToFTest, HexadecimalOutOfRangeTests) { + runTest("0x123456789123456789123456789123456789", 38, 0x7f800000, ERANGE); + runTest("-0x123456789123456789123456789123456789", 39, 0xff800000, ERANGE); + runTest("0x0.00000000000000000000000000000000000001", 42, 0x0, ERANGE); +} + +TEST_F(LlvmLibcStrToFTest, InfTests) { + runTest("INF", 3, 0x7f800000); + runTest("INFinity", 8, 0x7f800000); + runTest("infnity", 3, 0x7f800000); + runTest("infinit", 3, 0x7f800000); + runTest("infinfinit", 3, 0x7f800000); + runTest("innf", 0, 0x0); + runTest("-inf", 4, 0xff800000); + runTest("-iNfInItY", 9, 0xff800000); +} + +TEST_F(LlvmLibcStrToFTest, NaNTests) { + runTest("NaN", 3, 0x7fc00000); + runTest("-nAn", 4, 0xffc00000); + runTest("NaN()", 5, 0x7fc00000); + runTest("NaN(1234)", 9, 0x7fc004d2); + runTest("NaN( 1234)", 3, 0x7fc00000); +}