mirror of https://github.com/mgba-emu/mgba.git
260 lines
8.3 KiB
C
260 lines
8.3 KiB
C
/* Copyright (c) 2013-2014 Jeffrey Pfau
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef COMMON_H
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#define COMMON_H
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#ifdef __cplusplus
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#define CXX_GUARD_START extern "C" {
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#define CXX_GUARD_END }
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#else
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#define CXX_GUARD_START
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#define CXX_GUARD_END
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#endif
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CXX_GUARD_START
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#include <ctype.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <math.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#ifdef _WIN32
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// WinSock2 gets very angry if it's included too late
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#include <winsock2.h>
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#endif
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#if defined(_MSC_VER) || defined(__cplusplus)
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#define restrict __restrict
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#endif
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#ifdef _MSC_VER
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#include <Windows.h>
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#include <sys/types.h>
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typedef intptr_t ssize_t;
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#define PATH_MAX MAX_PATH
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#define strcasecmp _stricmp
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#define strncasecmp _strnicmp
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#define ftruncate _chsize
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#define snprintf _snprintf
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#define strdup _strdup
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#define lseek _lseek
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#define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
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#elif defined(__wii__)
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#include <sys/time.h>
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typedef intptr_t ssize_t;
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#else
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#include <strings.h>
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#include <unistd.h>
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#include <sys/time.h>
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#endif
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#ifdef PSP2
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// For PATH_MAX on modern toolchains
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#include <sys/syslimits.h>
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#endif
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#ifndef SSIZE_MAX
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#define SSIZE_MAX ((ssize_t) (SIZE_MAX >> 1))
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#endif
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#ifndef UNUSED
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#define UNUSED(V) (void)(V)
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#endif
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#ifndef M_PI
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#define M_PI 3.141592654f
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#endif
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#if !defined(_MSC_VER) && (defined(__llvm__) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
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#define ATOMIC_STORE(DST, SRC) __atomic_store_n(&DST, SRC, __ATOMIC_RELEASE)
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#define ATOMIC_LOAD(DST, SRC) DST = __atomic_load_n(&SRC, __ATOMIC_ACQUIRE)
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#define ATOMIC_ADD(DST, OP) __atomic_add_fetch(&DST, OP, __ATOMIC_RELEASE)
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#define ATOMIC_OR(DST, OP) __atomic_or_fetch(&DST, OP, __ATOMIC_RELEASE)
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#define ATOMIC_AND(DST, OP) __atomic_and_fetch(&DST, OP, __ATOMIC_RELEASE)
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#define ATOMIC_CMPXCHG(DST, EXPECTED, SRC) __atomic_compare_exchange_n(&DST, &EXPECTED, SRC, true,__ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE)
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#else
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// TODO
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#define ATOMIC_STORE(DST, SRC) DST = SRC
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#define ATOMIC_LOAD(DST, SRC) DST = SRC
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#define ATOMIC_ADD(DST, OP) DST += OP
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#define ATOMIC_OR(DST, OP) DST |= OP
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#define ATOMIC_AND(DST, OP) DST &= OP
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#define ATOMIC_CMPXCHG(DST, EXPECTED, OP) ((DST == EXPECTED) ? ((DST = OP), true) : false)
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#endif
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#if defined(_3DS) || defined(GEKKO) || defined(PSP2)
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// newlib doesn't support %z properly by default
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#define PRIz ""
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#elif defined(_WIN64)
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#define PRIz "ll"
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#elif defined(_WIN32)
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#define PRIz ""
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#else
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#define PRIz "z"
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#endif
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#if defined __BIG_ENDIAN__
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#define LOAD_32BE(DEST, ADDR, ARR) DEST = *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR))
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#if defined(__PPC__) || defined(__POWERPC__)
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#define LOAD_32LE(DEST, ADDR, ARR) { \
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uint32_t _addr = (ADDR); \
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const void* _ptr = (ARR); \
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__asm__("lwbrx %0, %1, %2" : "=r"(DEST) : "b"(_ptr), "r"(_addr)); \
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}
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#define LOAD_16LE(DEST, ADDR, ARR) { \
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uint32_t _addr = (ADDR); \
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const void* _ptr = (ARR); \
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__asm__("lhbrx %0, %1, %2" : "=r"(DEST) : "b"(_ptr), "r"(_addr)); \
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}
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#define STORE_32LE(SRC, ADDR, ARR) { \
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uint32_t _addr = (ADDR); \
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void* _ptr = (ARR); \
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__asm__("stwbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr) : "memory"); \
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}
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#define STORE_16LE(SRC, ADDR, ARR) { \
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uint32_t _addr = (ADDR); \
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void* _ptr = (ARR); \
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__asm__("sthbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr) : "memory"); \
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}
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#define LOAD_64LE(DEST, ADDR, ARR) { \
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uint32_t _addr = (ADDR); \
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union { \
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struct { \
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uint32_t hi; \
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uint32_t lo; \
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}; \
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uint64_t b64; \
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} bswap; \
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const void* _ptr = (ARR); \
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__asm__( \
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"lwbrx %0, %2, %3 \n" \
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"lwbrx %1, %2, %4 \n" \
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: "=&r"(bswap.lo), "=&r"(bswap.hi) : "b"(_ptr), "r"(_addr), "r"(_addr + 4)) ; \
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DEST = bswap.b64; \
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}
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#define STORE_64LE(SRC, ADDR, ARR) { \
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uint32_t _addr = (ADDR); \
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union { \
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struct { \
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uint32_t hi; \
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uint32_t lo; \
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}; \
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uint64_t b64; \
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} bswap = { .b64 = SRC }; \
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const void* _ptr = (ARR); \
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__asm__( \
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"stwbrx %0, %2, %3 \n" \
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"stwbrx %1, %2, %4 \n" \
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: : "r"(bswap.hi), "r"(bswap.lo), "b"(_ptr), "r"(_addr), "r"(_addr + 4) : "memory"); \
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}
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#elif defined(__llvm__) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
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#define LOAD_64LE(DEST, ADDR, ARR) DEST = __builtin_bswap64(((uint64_t*) ARR)[(ADDR) >> 3])
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#define LOAD_32LE(DEST, ADDR, ARR) DEST = __builtin_bswap32(((uint32_t*) ARR)[(ADDR) >> 2])
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#define LOAD_16LE(DEST, ADDR, ARR) DEST = __builtin_bswap16(((uint16_t*) ARR)[(ADDR) >> 1])
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#define STORE_64LE(SRC, ADDR, ARR) ((uint64_t*) ARR)[(ADDR) >> 3] = __builtin_bswap64(SRC)
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#define STORE_32LE(SRC, ADDR, ARR) ((uint32_t*) ARR)[(ADDR) >> 2] = __builtin_bswap32(SRC)
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#define STORE_16LE(SRC, ADDR, ARR) ((uint16_t*) ARR)[(ADDR) >> 1] = __builtin_bswap16(SRC)
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#else
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#error Big endian build not supported on this platform.
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#endif
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#else
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#define LOAD_64LE(DEST, ADDR, ARR) DEST = *(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR))
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#define LOAD_32LE(DEST, ADDR, ARR) DEST = *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR))
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#define LOAD_16LE(DEST, ADDR, ARR) DEST = *(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR))
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#define STORE_64LE(SRC, ADDR, ARR) *(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = SRC
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#define STORE_32LE(SRC, ADDR, ARR) *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = SRC
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#define STORE_16LE(SRC, ADDR, ARR) *(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = SRC
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#ifdef _MSC_VER
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#define LOAD_32BE(DEST, ADDR, ARR) DEST = _byteswap_ulong(((uint32_t*) ARR)[(ADDR) >> 2])
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#else
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#define LOAD_32BE(DEST, ADDR, ARR) DEST = __builtin_bswap32(((uint32_t*) ARR)[(ADDR) >> 2])
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#endif
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#endif
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#define MAKE_MASK(START, END) (((1 << ((END) - (START))) - 1) << (START))
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#define CHECK_BITS(SRC, START, END) ((SRC) & MAKE_MASK(START, END))
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#define EXT_BITS(SRC, START, END) (((SRC) >> (START)) & ((1 << ((END) - (START))) - 1))
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#define INS_BITS(SRC, START, END, BITS) (CLEAR_BITS(SRC, START, END) | (((BITS) << (START)) & MAKE_MASK(START, END)))
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#define CLEAR_BITS(SRC, START, END) ((SRC) & ~MAKE_MASK(START, END))
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#define FILL_BITS(SRC, START, END) ((SRC) | MAKE_MASK(START, END))
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#define TEST_FILL_BITS(SRC, START, END, TEST) ((TEST) ? (FILL_BITS(SRC, START, END)) : (CLEAR_BITS(SRC, START, END)))
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#ifdef _MSC_VER
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#pragma section(".CRT$XCU",read)
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#define ATTRIBUTE_UNUSED
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#define ATTRIBUTE_FORMAT(X, Y, Z)
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#define ATTRIBUTE_NOINLINE
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// Adapted from https://stackoverflow.com/a/2390626
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#define _CONSTRUCTOR(FN, PRE) \
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static void FN(void); \
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__declspec(allocate(".CRT$XCU")) void (*_CONSTRUCTOR_ ## FN)(void) = FN; \
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__pragma(comment(linker,"/include:" PRE "_CONSTRUCTOR_" #FN)) \
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static void FN(void)
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#ifdef _WIN64
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#define CONSTRUCTOR(FN) _CONSTRUCTOR(FN, "")
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#else
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#define CONSTRUCTOR(FN) _CONSTRUCTOR(FN, "_")
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#endif
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#else
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#define ATTRIBUTE_UNUSED __attribute__((unused))
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#define ATTRIBUTE_FORMAT(X, Y, Z) __attribute__((format(X, Y, Z)))
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#define ATTRIBUTE_NOINLINE __attribute__((noinline))
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#define CONSTRUCTOR(FN) static __attribute__((constructor)) void FN(void)
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#endif
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#define DECL_BITFIELD(NAME, TYPE) typedef TYPE NAME
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#define DECL_BITS(TYPE, FIELD, START, SIZE) \
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ATTRIBUTE_UNUSED static inline TYPE TYPE ## Is ## FIELD (TYPE src) { \
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return CHECK_BITS(src, (START), (START) + (SIZE)); \
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} \
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ATTRIBUTE_UNUSED static inline TYPE TYPE ## Get ## FIELD (TYPE src) { \
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return EXT_BITS(src, (START), (START) + (SIZE)); \
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} \
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ATTRIBUTE_UNUSED static inline TYPE TYPE ## Clear ## FIELD (TYPE src) { \
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return CLEAR_BITS(src, (START), (START) + (SIZE)); \
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} \
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ATTRIBUTE_UNUSED static inline TYPE TYPE ## Fill ## FIELD (TYPE src) { \
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return FILL_BITS(src, (START), (START) + (SIZE)); \
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} \
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ATTRIBUTE_UNUSED static inline TYPE TYPE ## Set ## FIELD (TYPE src, TYPE bits) { \
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return INS_BITS(src, (START), (START) + (SIZE), bits); \
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} \
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ATTRIBUTE_UNUSED static inline TYPE TYPE ## TestFill ## FIELD (TYPE src, bool test) { \
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return TEST_FILL_BITS(src, (START), (START) + (SIZE), test); \
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}
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#define DECL_BIT(TYPE, FIELD, BIT) DECL_BITS(TYPE, FIELD, BIT, 1)
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#ifndef _MSC_VER
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#define LIKELY(X) __builtin_expect(!!(X), 1)
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#define UNLIKELY(X) __builtin_expect(!!(X), 0)
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#else
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#define LIKELY(X) (!!(X))
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#define UNLIKELY(X) (!!(X))
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#endif
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#define ROR(I, ROTATE) ((((uint32_t) (I)) >> ROTATE) | ((uint32_t) (I) << ((-ROTATE) & 31)))
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CXX_GUARD_END
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#endif
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