diff options
Diffstat (limited to 'lib/builtins/floatunsidf.c')
-rw-r--r-- | lib/builtins/floatunsidf.c | 51 |
1 files changed, 24 insertions, 27 deletions
diff --git a/lib/builtins/floatunsidf.c b/lib/builtins/floatunsidf.c index 75cf6b9177df..2c01c3041434 100644 --- a/lib/builtins/floatunsidf.c +++ b/lib/builtins/floatunsidf.c @@ -1,9 +1,8 @@ //===-- lib/floatunsidf.c - uint -> double-precision 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. +// 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 // //===----------------------------------------------------------------------===// // @@ -18,33 +17,31 @@ #include "int_lib.h" -COMPILER_RT_ABI fp_t -__floatunsidf(unsigned int a) { - - const int aWidth = sizeof a * CHAR_BIT; - - // Handle zero as a special case to protect clz - if (a == 0) return fromRep(0); - - // Exponent of (fp_t)a is the width of abs(a). - const int exponent = (aWidth - 1) - __builtin_clz(a); - rep_t result; - - // Shift a into the significand field and clear the implicit bit. - const int shift = significandBits - exponent; - result = (rep_t)a << shift ^ implicitBit; - - // Insert the exponent - result += (rep_t)(exponent + exponentBias) << significandBits; - return fromRep(result); +COMPILER_RT_ABI fp_t __floatunsidf(unsigned int a) { + + const int aWidth = sizeof a * CHAR_BIT; + + // Handle zero as a special case to protect clz + if (a == 0) + return fromRep(0); + + // Exponent of (fp_t)a is the width of abs(a). + const int exponent = (aWidth - 1) - __builtin_clz(a); + rep_t result; + + // Shift a into the significand field and clear the implicit bit. + const int shift = significandBits - exponent; + result = (rep_t)a << shift ^ implicitBit; + + // Insert the exponent + result += (rep_t)(exponent + exponentBias) << significandBits; + return fromRep(result); } #if defined(__ARM_EABI__) #if defined(COMPILER_RT_ARMHF_TARGET) -AEABI_RTABI fp_t __aeabi_ui2d(unsigned int a) { - return __floatunsidf(a); -} +AEABI_RTABI fp_t __aeabi_ui2d(unsigned int a) { return __floatunsidf(a); } #else -AEABI_RTABI fp_t __aeabi_ui2d(unsigned int a) COMPILER_RT_ALIAS(__floatunsidf); +COMPILER_RT_ALIAS(__floatunsidf, __aeabi_ui2d) #endif #endif |