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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/fp_fixuint_impl.inc | |
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/fp_fixuint_impl.inc')
-rw-r--r-- | contrib/libs/cxxsupp/builtins/fp_fixuint_impl.inc | 78 |
1 files changed, 39 insertions, 39 deletions
diff --git a/contrib/libs/cxxsupp/builtins/fp_fixuint_impl.inc b/contrib/libs/cxxsupp/builtins/fp_fixuint_impl.inc index d68ccf27a7..1588ebf8f3 100644 --- a/contrib/libs/cxxsupp/builtins/fp_fixuint_impl.inc +++ b/contrib/libs/cxxsupp/builtins/fp_fixuint_impl.inc @@ -1,39 +1,39 @@ -//===-- lib/fixdfsi.c - Double-precision -> integer conversion ----*- C -*-===// -// -// 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 float to unsigned integer conversion for the -// compiler-rt library. -// -//===----------------------------------------------------------------------===// - -#include "fp_lib.h" - -static __inline fixuint_t __fixuint(fp_t a) { - // Break a into sign, exponent, significand - const rep_t aRep = toRep(a); - const rep_t aAbs = aRep & absMask; - const int sign = aRep & signBit ? -1 : 1; - const int exponent = (aAbs >> significandBits) - exponentBias; - const rep_t significand = (aAbs & significandMask) | implicitBit; - - // If either the value or the exponent is negative, the result is zero. - if (sign == -1 || exponent < 0) - return 0; - - // If the value is too large for the integer type, saturate. - if ((unsigned)exponent >= sizeof(fixuint_t) * CHAR_BIT) - return ~(fixuint_t)0; - - // If 0 <= exponent < significandBits, right shift to get the result. - // Otherwise, shift left. - if (exponent < significandBits) - return significand >> (significandBits - exponent); - else - return (fixuint_t)significand << (exponent - significandBits); -} +//===-- lib/fixdfsi.c - Double-precision -> integer conversion ----*- C -*-===// +// +// 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 float to unsigned integer conversion for the +// compiler-rt library. +// +//===----------------------------------------------------------------------===// + +#include "fp_lib.h" + +static __inline fixuint_t __fixuint(fp_t a) { + // Break a into sign, exponent, significand + const rep_t aRep = toRep(a); + const rep_t aAbs = aRep & absMask; + const int sign = aRep & signBit ? -1 : 1; + const int exponent = (aAbs >> significandBits) - exponentBias; + const rep_t significand = (aAbs & significandMask) | implicitBit; + + // If either the value or the exponent is negative, the result is zero. + if (sign == -1 || exponent < 0) + return 0; + + // If the value is too large for the integer type, saturate. + if ((unsigned)exponent >= sizeof(fixuint_t) * CHAR_BIT) + return ~(fixuint_t)0; + + // If 0 <= exponent < significandBits, right shift to get the result. + // Otherwise, shift left. + if (exponent < significandBits) + return significand >> (significandBits - exponent); + else + return (fixuint_t)significand << (exponent - significandBits); +} |