130 lines
3.8 KiB
C
130 lines
3.8 KiB
C
/* ===-- int_lib.h - configuration header for compiler-rt -----------------===
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*
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* The LLVM Compiler Infrastructure
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*
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* This file is dual licensed under the MIT and the University of Illinois Open
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* Source Licenses. See LICENSE.TXT for details.
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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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*/
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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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#if defined(__ELF__)
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#define FNALIAS(alias_name, original_name) \
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void alias_name() __attribute__((alias(#original_name)))
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#else
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#define FNALIAS(alias, name) _Pragma("GCC error(\"alias unsupported on this file format\")")
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#endif
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/* ABI macro definitions */
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#if __ARM_EABI__
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# define ARM_EABI_FNALIAS(aeabi_name, name) \
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void __aeabi_##aeabi_name() __attribute__((alias("__" #name)));
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# define COMPILER_RT_ABI __attribute__((pcs("aapcs")))
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#else
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# define ARM_EABI_FNALIAS(aeabi_name, name)
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# define COMPILER_RT_ABI
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#endif
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#ifdef _MSC_VER
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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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#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 <limits.h>
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# include <stdint.h>
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# include <stdbool.h>
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# include <float.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 si_int __paritysi2(si_int a);
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COMPILER_RT_ABI si_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 si_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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uint32_t __inline __builtin_ctz(uint32_t value) {
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uint32_t 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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uint32_t __inline __builtin_clz(uint32_t value) {
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uint32_t 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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uint32_t __inline __builtin_clzll(uint64_t value) {
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uint32_t 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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uint32_t __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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