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libavutil/x86_cpu.h

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00001 /*
00002  * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
00003  *
00004  * This file is part of Libav.
00005  *
00006  * Libav is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * Libav is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with Libav; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00021 #ifndef AVUTIL_X86_CPU_H
00022 #define AVUTIL_X86_CPU_H
00023 
00024 #include <stdint.h>
00025 #include "config.h"
00026 
00027 #if ARCH_X86_64
00028 #    define OPSIZE "q"
00029 #    define REG_a "rax"
00030 #    define REG_b "rbx"
00031 #    define REG_c "rcx"
00032 #    define REG_d "rdx"
00033 #    define REG_D "rdi"
00034 #    define REG_S "rsi"
00035 #    define PTR_SIZE "8"
00036 typedef int64_t x86_reg;
00037 
00038 #    define REG_SP "rsp"
00039 #    define REG_BP "rbp"
00040 #    define REGBP   rbp
00041 #    define REGa    rax
00042 #    define REGb    rbx
00043 #    define REGc    rcx
00044 #    define REGd    rdx
00045 #    define REGSP   rsp
00046 
00047 #elif ARCH_X86_32
00048 
00049 #    define OPSIZE "l"
00050 #    define REG_a "eax"
00051 #    define REG_b "ebx"
00052 #    define REG_c "ecx"
00053 #    define REG_d "edx"
00054 #    define REG_D "edi"
00055 #    define REG_S "esi"
00056 #    define PTR_SIZE "4"
00057 typedef int32_t x86_reg;
00058 
00059 #    define REG_SP "esp"
00060 #    define REG_BP "ebp"
00061 #    define REGBP   ebp
00062 #    define REGa    eax
00063 #    define REGb    ebx
00064 #    define REGc    ecx
00065 #    define REGd    edx
00066 #    define REGSP   esp
00067 #else
00068 typedef int x86_reg;
00069 #endif
00070 
00071 #define HAVE_7REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE && HAVE_EBP_AVAILABLE))
00072 #define HAVE_6REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE || HAVE_EBP_AVAILABLE))
00073 
00074 #if ARCH_X86_64 && defined(PIC)
00075 #    define BROKEN_RELOCATIONS 1
00076 #endif
00077 
00078 /*
00079  * If gcc is not set to support sse (-msse) it will not accept xmm registers
00080  * in the clobber list for inline asm. XMM_CLOBBERS takes a list of xmm
00081  * registers to be marked as clobbered and evaluates to nothing if they are
00082  * not supported, or to the list itself if they are supported. Since a clobber
00083  * list may not be empty, XMM_CLOBBERS_ONLY should be used if the xmm
00084  * registers are the only in the clobber list.
00085  * For example a list with "eax" and "xmm0" as clobbers should become:
00086  * : XMM_CLOBBERS("xmm0",) "eax"
00087  * and a list with only "xmm0" should become:
00088  * XMM_CLOBBERS_ONLY("xmm0")
00089  */
00090 #if HAVE_XMM_CLOBBERS
00091 #    define XMM_CLOBBERS(...)        __VA_ARGS__
00092 #    define XMM_CLOBBERS_ONLY(...) : __VA_ARGS__
00093 #else
00094 #    define XMM_CLOBBERS(...)
00095 #    define XMM_CLOBBERS_ONLY(...)
00096 #endif
00097 
00098 #endif /* AVUTIL_X86_CPU_H */
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