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author | Anton Samokhvalov <pg83@yandex.ru> | 2022-02-10 16:45:15 +0300 |
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committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:45:15 +0300 |
commit | 72cb13b4aff9bc9cf22e49251bc8fd143f82538f (patch) | |
tree | da2c34829458c7d4e74bdfbdf85dff449e9e7fb8 /contrib/libs/cxxsupp/builtins/muldi3.c | |
parent | 778e51ba091dc39e7b7fcab2b9cf4dbedfb6f2b5 (diff) | |
download | ydb-72cb13b4aff9bc9cf22e49251bc8fd143f82538f.tar.gz |
Restoring authorship annotation for Anton Samokhvalov <pg83@yandex.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/libs/cxxsupp/builtins/muldi3.c')
-rw-r--r-- | contrib/libs/cxxsupp/builtins/muldi3.c | 112 |
1 files changed, 56 insertions, 56 deletions
diff --git a/contrib/libs/cxxsupp/builtins/muldi3.c b/contrib/libs/cxxsupp/builtins/muldi3.c index 2dae44c11b..9beacb33b2 100644 --- a/contrib/libs/cxxsupp/builtins/muldi3.c +++ b/contrib/libs/cxxsupp/builtins/muldi3.c @@ -1,56 +1,56 @@ -/* ===-- muldi3.c - Implement __muldi3 -------------------------------------=== - * - * The LLVM Compiler Infrastructure - * - * This file is dual licensed under the MIT and the University of Illinois Open - * Source Licenses. See LICENSE.TXT for details. - * - * ===----------------------------------------------------------------------=== - * - * This file implements __muldi3 for the compiler_rt library. - * - * ===----------------------------------------------------------------------=== - */ - -#include "int_lib.h" - -/* Returns: a * b */ - -static -di_int -__muldsi3(su_int a, su_int b) -{ - dwords r; - const int bits_in_word_2 = (int)(sizeof(si_int) * CHAR_BIT) / 2; - const su_int lower_mask = (su_int)~0 >> bits_in_word_2; - r.s.low = (a & lower_mask) * (b & lower_mask); - su_int t = r.s.low >> bits_in_word_2; - r.s.low &= lower_mask; - t += (a >> bits_in_word_2) * (b & lower_mask); - r.s.low += (t & lower_mask) << bits_in_word_2; - r.s.high = t >> bits_in_word_2; - t = r.s.low >> bits_in_word_2; - r.s.low &= lower_mask; - t += (b >> bits_in_word_2) * (a & lower_mask); - r.s.low += (t & lower_mask) << bits_in_word_2; - r.s.high += t >> bits_in_word_2; - r.s.high += (a >> bits_in_word_2) * (b >> bits_in_word_2); - return r.all; -} - -/* Returns: a * b */ - -ARM_EABI_FNALIAS(lmul, muldi3) - -COMPILER_RT_ABI di_int -__muldi3(di_int a, di_int b) -{ - dwords x; - x.all = a; - dwords y; - y.all = b; - dwords r; - r.all = __muldsi3(x.s.low, y.s.low); - r.s.high += x.s.high * y.s.low + x.s.low * y.s.high; - return r.all; -} +/* ===-- muldi3.c - Implement __muldi3 -------------------------------------=== + * + * The LLVM Compiler Infrastructure + * + * This file is dual licensed under the MIT and the University of Illinois Open + * Source Licenses. See LICENSE.TXT for details. + * + * ===----------------------------------------------------------------------=== + * + * This file implements __muldi3 for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ + +#include "int_lib.h" + +/* Returns: a * b */ + +static +di_int +__muldsi3(su_int a, su_int b) +{ + dwords r; + const int bits_in_word_2 = (int)(sizeof(si_int) * CHAR_BIT) / 2; + const su_int lower_mask = (su_int)~0 >> bits_in_word_2; + r.s.low = (a & lower_mask) * (b & lower_mask); + su_int t = r.s.low >> bits_in_word_2; + r.s.low &= lower_mask; + t += (a >> bits_in_word_2) * (b & lower_mask); + r.s.low += (t & lower_mask) << bits_in_word_2; + r.s.high = t >> bits_in_word_2; + t = r.s.low >> bits_in_word_2; + r.s.low &= lower_mask; + t += (b >> bits_in_word_2) * (a & lower_mask); + r.s.low += (t & lower_mask) << bits_in_word_2; + r.s.high += t >> bits_in_word_2; + r.s.high += (a >> bits_in_word_2) * (b >> bits_in_word_2); + return r.all; +} + +/* Returns: a * b */ + +ARM_EABI_FNALIAS(lmul, muldi3) + +COMPILER_RT_ABI di_int +__muldi3(di_int a, di_int b) +{ + dwords x; + x.all = a; + dwords y; + y.all = b; + dwords r; + r.all = __muldsi3(x.s.low, y.s.low); + r.s.high += x.s.high * y.s.low + x.s.low * y.s.high; + return r.all; +} |