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581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
478 lines
14 KiB
C
478 lines
14 KiB
C
/* Internal function for converting integers to ASCII.
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Copyright (C) 1994-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <gmp-mparam.h>
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#include <gmp.h>
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#include <limits.h>
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#include <stdlib/gmp-impl.h>
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#include <stdlib/longlong.h>
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#include <_itoa.h>
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/* Canonize environment. For some architectures not all values might
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be defined in the GMP header files. */
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#ifndef UMUL_TIME
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# define UMUL_TIME 1
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#endif
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#ifndef UDIV_TIME
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# define UDIV_TIME 3
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#endif
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/* Control memory layout. */
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#ifdef PACK
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# undef PACK
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# define PACK __attribute__ ((packed))
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#else
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# define PACK
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#endif
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/* Declare local types. */
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struct base_table_t
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{
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#if (UDIV_TIME > 2 * UMUL_TIME)
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mp_limb_t base_multiplier;
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#endif
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char flag;
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char post_shift;
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#if BITS_PER_MP_LIMB == 32
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struct
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{
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char normalization_steps;
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char ndigits;
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mp_limb_t base PACK;
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#if UDIV_TIME > 2 * UMUL_TIME
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mp_limb_t base_ninv PACK;
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#endif
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} big;
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#endif
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};
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/* To reduce the memory needed we include some fields of the tables
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only conditionally. */
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#if UDIV_TIME > 2 * UMUL_TIME
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# define SEL1(X) X,
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# define SEL2(X) ,X
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#else
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# define SEL1(X)
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# define SEL2(X)
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#endif
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/* We do not compile _itoa if we always can use _itoa_word. */
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#if _ITOA_NEEDED
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/* Local variables. */
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const struct base_table_t _itoa_base_table[] attribute_hidden =
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{
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# if BITS_PER_MP_LIMB == 64
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/* 2 */ {SEL1(0ull) 1, 1},
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/* 3 */ {SEL1(0xaaaaaaaaaaaaaaabull) 0, 1},
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/* 4 */ {SEL1(0ull) 1, 2},
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/* 5 */ {SEL1(0xcccccccccccccccdull) 0, 2},
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/* 6 */ {SEL1(0xaaaaaaaaaaaaaaabull) 0, 2},
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/* 7 */ {SEL1(0x2492492492492493ull) 1, 3},
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/* 8 */ {SEL1(0ull) 1, 3},
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/* 9 */ {SEL1(0xe38e38e38e38e38full) 0, 3},
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/* 10 */ {SEL1(0xcccccccccccccccdull) 0, 3},
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/* 11 */ {SEL1(0x2e8ba2e8ba2e8ba3ull) 0, 1},
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/* 12 */ {SEL1(0xaaaaaaaaaaaaaaabull) 0, 3},
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/* 13 */ {SEL1(0x4ec4ec4ec4ec4ec5ull) 0, 2},
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/* 14 */ {SEL1(0x2492492492492493ull) 1, 4},
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/* 15 */ {SEL1(0x8888888888888889ull) 0, 3},
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/* 16 */ {SEL1(0ull) 1, 4},
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/* 17 */ {SEL1(0xf0f0f0f0f0f0f0f1ull) 0, 4},
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/* 18 */ {SEL1(0xe38e38e38e38e38full) 0, 4},
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/* 19 */ {SEL1(0xd79435e50d79435full) 0, 4},
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/* 20 */ {SEL1(0xcccccccccccccccdull) 0, 4},
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/* 21 */ {SEL1(0x8618618618618619ull) 1, 5},
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/* 22 */ {SEL1(0x2e8ba2e8ba2e8ba3ull) 0, 2},
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/* 23 */ {SEL1(0x642c8590b21642c9ull) 1, 5},
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/* 24 */ {SEL1(0xaaaaaaaaaaaaaaabull) 0, 4},
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/* 25 */ {SEL1(0x47ae147ae147ae15ull) 1, 5},
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/* 26 */ {SEL1(0x4ec4ec4ec4ec4ec5ull) 0, 3},
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/* 27 */ {SEL1(0x97b425ed097b425full) 0, 4},
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/* 28 */ {SEL1(0x2492492492492493ull) 1, 5},
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/* 29 */ {SEL1(0x1a7b9611a7b9611bull) 1, 5},
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/* 30 */ {SEL1(0x8888888888888889ull) 0, 4},
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/* 31 */ {SEL1(0x0842108421084211ull) 1, 5},
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/* 32 */ {SEL1(0ull) 1, 5},
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/* 33 */ {SEL1(0x0f83e0f83e0f83e1ull) 0, 1},
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/* 34 */ {SEL1(0xf0f0f0f0f0f0f0f1ull) 0, 5},
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/* 35 */ {SEL1(0xea0ea0ea0ea0ea0full) 0, 5},
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/* 36 */ {SEL1(0xe38e38e38e38e38full) 0, 5}
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# endif
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# if BITS_PER_MP_LIMB == 32
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/* 2 */ {SEL1(0ul) 1, 1, {0, 31, 0x80000000ul SEL2(0xfffffffful)}},
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/* 3 */ {SEL1(0xaaaaaaabul) 0, 1, {0, 20, 0xcfd41b91ul SEL2(0x3b563c24ul)}},
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/* 4 */ {SEL1(0ul) 1, 2, {1, 15, 0x40000000ul SEL2(0xfffffffful)}},
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/* 5 */ {SEL1(0xcccccccdul) 0, 2, {1, 13, 0x48c27395ul SEL2(0xc25c2684ul)}},
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/* 6 */ {SEL1(0xaaaaaaabul) 0, 2, {0, 12, 0x81bf1000ul SEL2(0xf91bd1b6ul)}},
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/* 7 */ {SEL1(0x24924925ul) 1, 3, {1, 11, 0x75db9c97ul SEL2(0x1607a2cbul)}},
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/* 8 */ {SEL1(0ul) 1, 3, {1, 10, 0x40000000ul SEL2(0xfffffffful)}},
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/* 9 */ {SEL1(0x38e38e39ul) 0, 1, {0, 10, 0xcfd41b91ul SEL2(0x3b563c24ul)}},
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/* 10 */ {SEL1(0xcccccccdul) 0, 3, {2, 9, 0x3b9aca00ul SEL2(0x12e0be82ul)}},
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/* 11 */ {SEL1(0xba2e8ba3ul) 0, 3, {0, 9, 0x8c8b6d2bul SEL2(0xd24cde04ul)}},
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/* 12 */ {SEL1(0xaaaaaaabul) 0, 3, {3, 8, 0x19a10000ul SEL2(0x3fa39ab5ul)}},
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/* 13 */ {SEL1(0x4ec4ec4ful) 0, 2, {2, 8, 0x309f1021ul SEL2(0x50f8ac5ful)}},
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/* 14 */ {SEL1(0x24924925ul) 1, 4, {1, 8, 0x57f6c100ul SEL2(0x74843b1eul)}},
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/* 15 */ {SEL1(0x88888889ul) 0, 3, {0, 8, 0x98c29b81ul SEL2(0xad0326c2ul)}},
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/* 16 */ {SEL1(0ul) 1, 4, {3, 7, 0x10000000ul SEL2(0xfffffffful)}},
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/* 17 */ {SEL1(0xf0f0f0f1ul) 0, 4, {3, 7, 0x18754571ul SEL2(0x4ef0b6bdul)}},
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/* 18 */ {SEL1(0x38e38e39ul) 0, 2, {2, 7, 0x247dbc80ul SEL2(0xc0fc48a1ul)}},
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/* 19 */ {SEL1(0xaf286bcbul) 1, 5, {2, 7, 0x3547667bul SEL2(0x33838942ul)}},
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/* 20 */ {SEL1(0xcccccccdul) 0, 4, {1, 7, 0x4c4b4000ul SEL2(0xad7f29abul)}},
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/* 21 */ {SEL1(0x86186187ul) 1, 5, {1, 7, 0x6b5a6e1dul SEL2(0x313c3d15ul)}},
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/* 22 */ {SEL1(0xba2e8ba3ul) 0, 4, {0, 7, 0x94ace180ul SEL2(0xb8cca9e0ul)}},
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/* 23 */ {SEL1(0xb21642c9ul) 0, 4, {0, 7, 0xcaf18367ul SEL2(0x42ed6de9ul)}},
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/* 24 */ {SEL1(0xaaaaaaabul) 0, 4, {4, 6, 0x0b640000ul SEL2(0x67980e0bul)}},
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/* 25 */ {SEL1(0x51eb851ful) 0, 3, {4, 6, 0x0e8d4a51ul SEL2(0x19799812ul)}},
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/* 26 */ {SEL1(0x4ec4ec4ful) 0, 3, {3, 6, 0x1269ae40ul SEL2(0xbce85396ul)}},
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/* 27 */ {SEL1(0x2f684bdbul) 1, 5, {3, 6, 0x17179149ul SEL2(0x62c103a9ul)}},
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/* 28 */ {SEL1(0x24924925ul) 1, 5, {3, 6, 0x1cb91000ul SEL2(0x1d353d43ul)}},
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/* 29 */ {SEL1(0x8d3dcb09ul) 0, 4, {2, 6, 0x23744899ul SEL2(0xce1deceaul)}},
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/* 30 */ {SEL1(0x88888889ul) 0, 4, {2, 6, 0x2b73a840ul SEL2(0x790fc511ul)}},
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/* 31 */ {SEL1(0x08421085ul) 1, 5, {2, 6, 0x34e63b41ul SEL2(0x35b865a0ul)}},
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/* 32 */ {SEL1(0ul) 1, 5, {1, 6, 0x40000000ul SEL2(0xfffffffful)}},
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/* 33 */ {SEL1(0x3e0f83e1ul) 0, 3, {1, 6, 0x4cfa3cc1ul SEL2(0xa9aed1b3ul)}},
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/* 34 */ {SEL1(0xf0f0f0f1ul) 0, 5, {1, 6, 0x5c13d840ul SEL2(0x63dfc229ul)}},
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/* 35 */ {SEL1(0xd41d41d5ul) 1, 6, {1, 6, 0x6d91b519ul SEL2(0x2b0fee30ul)}},
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/* 36 */ {SEL1(0x38e38e39ul) 0, 3, {0, 6, 0x81bf1000ul SEL2(0xf91bd1b6ul)}}
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# endif
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};
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#endif
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char *
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_itoa_word (_ITOA_WORD_TYPE value, char *buflim,
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unsigned int base, int upper_case)
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{
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const char *digits = (upper_case
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? _itoa_upper_digits
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: _itoa_lower_digits);
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switch (base)
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{
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#define SPECIAL(Base) \
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case Base: \
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do \
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*--buflim = digits[value % Base]; \
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while ((value /= Base) != 0); \
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break
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SPECIAL (10);
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SPECIAL (16);
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SPECIAL (8);
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default:
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do
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*--buflim = digits[value % base];
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while ((value /= base) != 0);
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}
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return buflim;
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}
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#undef SPECIAL
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#if _ITOA_NEEDED
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char *
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_itoa (unsigned long long int value, char *buflim, unsigned int base,
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int upper_case)
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{
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const char *digits = (upper_case
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? _itoa_upper_digits
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: _itoa_lower_digits);
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const struct base_table_t *brec = &_itoa_base_table[base - 2];
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switch (base)
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{
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# define RUN_2N(BITS) \
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do \
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{ \
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/* `unsigned long long int' always has 64 bits. */ \
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mp_limb_t work_hi = value >> (64 - BITS_PER_MP_LIMB); \
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\
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if (BITS_PER_MP_LIMB == 32) \
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{ \
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if (work_hi != 0) \
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{ \
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mp_limb_t work_lo; \
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int cnt; \
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\
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work_lo = value & 0xfffffffful; \
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for (cnt = BITS_PER_MP_LIMB / BITS; cnt > 0; --cnt) \
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{ \
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*--buflim = digits[work_lo & ((1ul << BITS) - 1)]; \
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work_lo >>= BITS; \
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} \
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if (BITS_PER_MP_LIMB % BITS != 0) \
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{ \
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work_lo \
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|= ((work_hi \
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& ((1 << (BITS - BITS_PER_MP_LIMB%BITS)) \
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- 1)) \
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<< BITS_PER_MP_LIMB % BITS); \
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work_hi >>= BITS - BITS_PER_MP_LIMB % BITS; \
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if (work_hi == 0) \
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work_hi = work_lo; \
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else \
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*--buflim = digits[work_lo]; \
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} \
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} \
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else \
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work_hi = value & 0xfffffffful; \
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} \
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do \
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{ \
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*--buflim = digits[work_hi & ((1 << BITS) - 1)]; \
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work_hi >>= BITS; \
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} \
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while (work_hi != 0); \
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} \
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while (0)
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case 8:
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RUN_2N (3);
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break;
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case 16:
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RUN_2N (4);
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break;
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default:
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{
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char *bufend = buflim;
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# if BITS_PER_MP_LIMB == 64
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mp_limb_t base_multiplier = brec->base_multiplier;
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if (brec->flag)
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while (value != 0)
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{
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mp_limb_t quo, rem, x;
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mp_limb_t dummy __attribute__ ((unused));
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umul_ppmm (x, dummy, value, base_multiplier);
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quo = (x + ((value - x) >> 1)) >> (brec->post_shift - 1);
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rem = value - quo * base;
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*--buflim = digits[rem];
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value = quo;
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}
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else
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while (value != 0)
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{
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mp_limb_t quo, rem, x;
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mp_limb_t dummy __attribute__ ((unused));
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umul_ppmm (x, dummy, value, base_multiplier);
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quo = x >> brec->post_shift;
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rem = value - quo * base;
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*--buflim = digits[rem];
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value = quo;
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}
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# endif
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# if BITS_PER_MP_LIMB == 32
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mp_limb_t t[3];
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int n;
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/* First convert x0 to 1-3 words in base s->big.base.
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Optimize for frequent cases of 32 bit numbers. */
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if ((mp_limb_t) (value >> 32) >= 1)
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{
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# if UDIV_TIME > 2 * UMUL_TIME || UDIV_NEEDS_NORMALIZATION
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int big_normalization_steps = brec->big.normalization_steps;
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mp_limb_t big_base_norm
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= brec->big.base << big_normalization_steps;
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# endif
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if ((mp_limb_t) (value >> 32) >= brec->big.base)
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{
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mp_limb_t x1hi, x1lo, r;
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/* If you want to optimize this, take advantage of
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that the quotient in the first udiv_qrnnd will
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always be very small. It might be faster just to
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subtract in a tight loop. */
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# if UDIV_TIME > 2 * UMUL_TIME
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mp_limb_t x, xh, xl;
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if (big_normalization_steps == 0)
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xh = 0;
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else
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xh = (mp_limb_t) (value >> (64 - big_normalization_steps));
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xl = (mp_limb_t) (value >> (32 - big_normalization_steps));
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udiv_qrnnd_preinv (x1hi, r, xh, xl, big_base_norm,
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brec->big.base_ninv);
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xl = ((mp_limb_t) value) << big_normalization_steps;
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udiv_qrnnd_preinv (x1lo, x, r, xl, big_base_norm,
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brec->big.base_ninv);
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t[2] = x >> big_normalization_steps;
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if (big_normalization_steps == 0)
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xh = x1hi;
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else
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xh = ((x1hi << big_normalization_steps)
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| (x1lo >> (32 - big_normalization_steps)));
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xl = x1lo << big_normalization_steps;
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udiv_qrnnd_preinv (t[0], x, xh, xl, big_base_norm,
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brec->big.base_ninv);
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t[1] = x >> big_normalization_steps;
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# elif UDIV_NEEDS_NORMALIZATION
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mp_limb_t x, xh, xl;
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if (big_normalization_steps == 0)
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xh = 0;
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else
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xh = (mp_limb_t) (value >> 64 - big_normalization_steps);
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xl = (mp_limb_t) (value >> 32 - big_normalization_steps);
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udiv_qrnnd (x1hi, r, xh, xl, big_base_norm);
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xl = ((mp_limb_t) value) << big_normalization_steps;
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udiv_qrnnd (x1lo, x, r, xl, big_base_norm);
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t[2] = x >> big_normalization_steps;
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if (big_normalization_steps == 0)
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xh = x1hi;
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else
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xh = ((x1hi << big_normalization_steps)
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| (x1lo >> 32 - big_normalization_steps));
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xl = x1lo << big_normalization_steps;
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udiv_qrnnd (t[0], x, xh, xl, big_base_norm);
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t[1] = x >> big_normalization_steps;
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# else
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udiv_qrnnd (x1hi, r, 0, (mp_limb_t) (value >> 32),
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brec->big.base);
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udiv_qrnnd (x1lo, t[2], r, (mp_limb_t) value, brec->big.base);
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udiv_qrnnd (t[0], t[1], x1hi, x1lo, brec->big.base);
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# endif
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n = 3;
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}
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else
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{
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# if UDIV_TIME > 2 * UMUL_TIME
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mp_limb_t x;
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value <<= brec->big.normalization_steps;
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udiv_qrnnd_preinv (t[0], x, (mp_limb_t) (value >> 32),
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(mp_limb_t) value, big_base_norm,
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brec->big.base_ninv);
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t[1] = x >> brec->big.normalization_steps;
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# elif UDIV_NEEDS_NORMALIZATION
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mp_limb_t x;
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value <<= big_normalization_steps;
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udiv_qrnnd (t[0], x, (mp_limb_t) (value >> 32),
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(mp_limb_t) value, big_base_norm);
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t[1] = x >> big_normalization_steps;
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# else
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udiv_qrnnd (t[0], t[1], (mp_limb_t) (value >> 32),
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(mp_limb_t) value, brec->big.base);
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# endif
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n = 2;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
t[0] = value;
|
|
n = 1;
|
|
}
|
|
|
|
/* Convert the 1-3 words in t[], word by word, to ASCII. */
|
|
do
|
|
{
|
|
mp_limb_t ti = t[--n];
|
|
int ndig_for_this_limb = 0;
|
|
|
|
# if UDIV_TIME > 2 * UMUL_TIME
|
|
mp_limb_t base_multiplier = brec->base_multiplier;
|
|
if (brec->flag)
|
|
while (ti != 0)
|
|
{
|
|
mp_limb_t quo, rem, x;
|
|
mp_limb_t dummy __attribute__ ((unused));
|
|
|
|
umul_ppmm (x, dummy, ti, base_multiplier);
|
|
quo = (x + ((ti - x) >> 1)) >> (brec->post_shift - 1);
|
|
rem = ti - quo * base;
|
|
*--buflim = digits[rem];
|
|
ti = quo;
|
|
++ndig_for_this_limb;
|
|
}
|
|
else
|
|
while (ti != 0)
|
|
{
|
|
mp_limb_t quo, rem, x;
|
|
mp_limb_t dummy __attribute__ ((unused));
|
|
|
|
umul_ppmm (x, dummy, ti, base_multiplier);
|
|
quo = x >> brec->post_shift;
|
|
rem = ti - quo * base;
|
|
*--buflim = digits[rem];
|
|
ti = quo;
|
|
++ndig_for_this_limb;
|
|
}
|
|
# else
|
|
while (ti != 0)
|
|
{
|
|
mp_limb_t quo, rem;
|
|
|
|
quo = ti / base;
|
|
rem = ti % base;
|
|
*--buflim = digits[rem];
|
|
ti = quo;
|
|
++ndig_for_this_limb;
|
|
}
|
|
# endif
|
|
/* If this wasn't the most significant word, pad with zeros. */
|
|
if (n != 0)
|
|
while (ndig_for_this_limb < brec->big.ndigits)
|
|
{
|
|
*--buflim = '0';
|
|
++ndig_for_this_limb;
|
|
}
|
|
}
|
|
while (n != 0);
|
|
# endif
|
|
if (buflim == bufend)
|
|
*--buflim = '0';
|
|
}
|
|
break;
|
|
}
|
|
|
|
return buflim;
|
|
}
|
|
#endif
|
|
|
|
char *
|
|
_fitoa_word (_ITOA_WORD_TYPE value, char *buf, unsigned int base,
|
|
int upper_case)
|
|
{
|
|
char tmpbuf[sizeof (value) * 4]; /* Worst case length: base 2. */
|
|
char *cp = _itoa_word (value, tmpbuf + sizeof (value) * 4, base, upper_case);
|
|
while (cp < tmpbuf + sizeof (value) * 4)
|
|
*buf++ = *cp++;
|
|
return buf;
|
|
}
|
|
|
|
#if _ITOA_NEEDED
|
|
char *
|
|
_fitoa (unsigned long long value, char *buf, unsigned int base, int upper_case)
|
|
{
|
|
char tmpbuf[sizeof (value) * 4]; /* Worst case length: base 2. */
|
|
char *cp = _itoa (value, tmpbuf + sizeof (value) * 4, base, upper_case);
|
|
while (cp < tmpbuf + sizeof (value) * 4)
|
|
*buf++ = *cp++;
|
|
return buf;
|
|
}
|
|
#endif
|