forked from OSchip/llvm-project
150 lines
4.3 KiB
C
150 lines
4.3 KiB
C
//===-- int_lib.h - configuration header for compiler-rt -----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a configuration header for compiler-rt.
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// This file is not part of the interface of this library.
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//
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//===----------------------------------------------------------------------===//
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#ifndef INT_LIB_H
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#define INT_LIB_H
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// Assumption: Signed integral is 2's complement.
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// Assumption: Right shift of signed negative is arithmetic shift.
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// Assumption: Endianness is little or big (not mixed).
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// ABI macro definitions
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#if __ARM_EABI__
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#ifdef COMPILER_RT_ARMHF_TARGET
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#define COMPILER_RT_ABI
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#else
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#define COMPILER_RT_ABI __attribute__((__pcs__("aapcs")))
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#endif
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#else
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#define COMPILER_RT_ABI
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#endif
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#define AEABI_RTABI __attribute__((__pcs__("aapcs")))
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#if defined(_MSC_VER) && !defined(__clang__)
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#define ALWAYS_INLINE __forceinline
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#define NOINLINE __declspec(noinline)
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#define NORETURN __declspec(noreturn)
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#define UNUSED
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#else
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#define ALWAYS_INLINE __attribute__((always_inline))
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#define NOINLINE __attribute__((noinline))
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#define NORETURN __attribute__((noreturn))
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#define UNUSED __attribute__((unused))
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#endif
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#define STR(a) #a
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#define XSTR(a) STR(a)
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#define SYMBOL_NAME(name) XSTR(__USER_LABEL_PREFIX__) #name
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#if defined(__ELF__) || defined(__MINGW32__) || defined(__wasm__) || \
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defined(_AIX)
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#define COMPILER_RT_ALIAS(name, aliasname) \
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COMPILER_RT_ABI __typeof(name) aliasname __attribute__((__alias__(#name)));
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#elif defined(__APPLE__)
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#if defined(VISIBILITY_HIDDEN)
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#define COMPILER_RT_ALIAS_VISIBILITY(name) \
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__asm__(".private_extern " SYMBOL_NAME(name));
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#else
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#define COMPILER_RT_ALIAS_VISIBILITY(name)
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#endif
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#define COMPILER_RT_ALIAS(name, aliasname) \
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__asm__(".globl " SYMBOL_NAME(aliasname)); \
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COMPILER_RT_ALIAS_VISIBILITY(aliasname) \
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__asm__(SYMBOL_NAME(aliasname) " = " SYMBOL_NAME(name)); \
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COMPILER_RT_ABI __typeof(name) aliasname;
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#elif defined(_WIN32)
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#define COMPILER_RT_ALIAS(name, aliasname)
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#else
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#error Unsupported target
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#endif
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#if defined(__NetBSD__) && (defined(_KERNEL) || defined(_STANDALONE))
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//
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// Kernel and boot environment can't use normal headers,
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// so use the equivalent system headers.
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//
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#include <machine/limits.h>
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#include <sys/stdint.h>
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#include <sys/types.h>
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#else
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// Include the standard compiler builtin headers we use functionality from.
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#include <float.h>
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#include <limits.h>
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#include <stdbool.h>
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#include <stdint.h>
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#endif
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// Include the commonly used internal type definitions.
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#include "int_types.h"
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// Include internal utility function declarations.
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#include "int_util.h"
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COMPILER_RT_ABI int __paritysi2(si_int a);
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COMPILER_RT_ABI int __paritydi2(di_int a);
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COMPILER_RT_ABI di_int __divdi3(di_int a, di_int b);
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COMPILER_RT_ABI si_int __divsi3(si_int a, si_int b);
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COMPILER_RT_ABI su_int __udivsi3(su_int n, su_int d);
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COMPILER_RT_ABI su_int __udivmodsi4(su_int a, su_int b, su_int *rem);
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COMPILER_RT_ABI du_int __udivmoddi4(du_int a, du_int b, du_int *rem);
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#ifdef CRT_HAS_128BIT
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COMPILER_RT_ABI int __clzti2(ti_int a);
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COMPILER_RT_ABI tu_int __udivmodti4(tu_int a, tu_int b, tu_int *rem);
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#endif
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// Definitions for builtins unavailable on MSVC
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#if defined(_MSC_VER) && !defined(__clang__)
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#include <intrin.h>
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int __inline __builtin_ctz(uint32_t value) {
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unsigned long trailing_zero = 0;
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if (_BitScanForward(&trailing_zero, value))
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return trailing_zero;
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return 32;
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}
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int __inline __builtin_clz(uint32_t value) {
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unsigned long leading_zero = 0;
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if (_BitScanReverse(&leading_zero, value))
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return 31 - leading_zero;
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return 32;
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}
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#if defined(_M_ARM) || defined(_M_X64)
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int __inline __builtin_clzll(uint64_t value) {
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unsigned long leading_zero = 0;
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if (_BitScanReverse64(&leading_zero, value))
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return 63 - leading_zero;
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return 64;
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}
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#else
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int __inline __builtin_clzll(uint64_t value) {
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if (value == 0)
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return 64;
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uint32_t msh = (uint32_t)(value >> 32);
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uint32_t lsh = (uint32_t)(value & 0xFFFFFFFF);
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if (msh != 0)
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return __builtin_clz(msh);
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return 32 + __builtin_clz(lsh);
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}
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#endif
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#define __builtin_clzl __builtin_clzll
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#endif // defined(_MSC_VER) && !defined(__clang__)
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#endif // INT_LIB_H
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