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author | Anton Samokhvalov <pg83@yandex.ru> | 2022-02-10 16:45:17 +0300 |
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committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:45:17 +0300 |
commit | d3a398281c6fd1d3672036cb2d63f842d2cb28c5 (patch) | |
tree | dd4bd3ca0f36b817e96812825ffaf10d645803f2 /contrib/libs/cxxsupp/builtins/fixunsxfti.c | |
parent | 72cb13b4aff9bc9cf22e49251bc8fd143f82538f (diff) | |
download | ydb-d3a398281c6fd1d3672036cb2d63f842d2cb28c5.tar.gz |
Restoring authorship annotation for Anton Samokhvalov <pg83@yandex.ru>. Commit 2 of 2.
Diffstat (limited to 'contrib/libs/cxxsupp/builtins/fixunsxfti.c')
-rw-r--r-- | contrib/libs/cxxsupp/builtins/fixunsxfti.c | 100 |
1 files changed, 50 insertions, 50 deletions
diff --git a/contrib/libs/cxxsupp/builtins/fixunsxfti.c b/contrib/libs/cxxsupp/builtins/fixunsxfti.c index 9ed2988424..fb39d00ff5 100644 --- a/contrib/libs/cxxsupp/builtins/fixunsxfti.c +++ b/contrib/libs/cxxsupp/builtins/fixunsxfti.c @@ -1,50 +1,50 @@ -/* ===-- fixunsxfti.c - Implement __fixunsxfti -----------------------------=== - * - * 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 __fixunsxfti for the compiler_rt library. - * - * ===----------------------------------------------------------------------=== - */ - -#include "int_lib.h" - -#ifdef CRT_HAS_128BIT - -/* Returns: convert a to a unsigned long long, rounding toward zero. - * Negative values all become zero. - */ - -/* Assumption: long double is an intel 80 bit floating point type padded with 6 bytes - * tu_int is a 128 bit integral type - * value in long double is representable in tu_int or is negative - */ - -/* gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee | - * 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm - */ - -COMPILER_RT_ABI tu_int -__fixunsxfti(long double a) -{ - long_double_bits fb; - fb.f = a; - int e = (fb.u.high.s.low & 0x00007FFF) - 16383; - if (e < 0 || (fb.u.high.s.low & 0x00008000)) - return 0; - if ((unsigned)e > sizeof(tu_int) * CHAR_BIT) - return ~(tu_int)0; - tu_int r = fb.u.low.all; - if (e > 63) - r <<= (e - 63); - else - r >>= (63 - e); - return r; -} - -#endif /* CRT_HAS_128BIT */ +/* ===-- fixunsxfti.c - Implement __fixunsxfti -----------------------------=== + * + * 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 __fixunsxfti for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ + +#include "int_lib.h" + +#ifdef CRT_HAS_128BIT + +/* Returns: convert a to a unsigned long long, rounding toward zero. + * Negative values all become zero. + */ + +/* Assumption: long double is an intel 80 bit floating point type padded with 6 bytes + * tu_int is a 128 bit integral type + * value in long double is representable in tu_int or is negative + */ + +/* gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee | + * 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm + */ + +COMPILER_RT_ABI tu_int +__fixunsxfti(long double a) +{ + long_double_bits fb; + fb.f = a; + int e = (fb.u.high.s.low & 0x00007FFF) - 16383; + if (e < 0 || (fb.u.high.s.low & 0x00008000)) + return 0; + if ((unsigned)e > sizeof(tu_int) * CHAR_BIT) + return ~(tu_int)0; + tu_int r = fb.u.low.all; + if (e > 63) + r <<= (e - 63); + else + r >>= (63 - e); + return r; +} + +#endif /* CRT_HAS_128BIT */ |