x86_cpu.h 2.81 KB
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/*
 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

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#ifndef AVUTIL_X86_CPU_H
#define AVUTIL_X86_CPU_H
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#include <stdint.h>
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#include "config.h"

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#if ARCH_X86_64
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#    define OPSIZE "q"
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#    define REG_a "rax"
#    define REG_b "rbx"
#    define REG_c "rcx"
#    define REG_d "rdx"
#    define REG_D "rdi"
#    define REG_S "rsi"
#    define PTR_SIZE "8"
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typedef int64_t x86_reg;
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#    define REG_SP "rsp"
#    define REG_BP "rbp"
#    define REGBP   rbp
#    define REGa    rax
#    define REGb    rbx
#    define REGc    rcx
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#    define REGd    rdx
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#    define REGSP   rsp
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#elif ARCH_X86_32
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#    define OPSIZE "l"
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#    define REG_a "eax"
#    define REG_b "ebx"
#    define REG_c "ecx"
#    define REG_d "edx"
#    define REG_D "edi"
#    define REG_S "esi"
#    define PTR_SIZE "4"
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typedef int32_t x86_reg;
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#    define REG_SP "esp"
#    define REG_BP "ebp"
#    define REGBP   ebp
#    define REGa    eax
#    define REGb    ebx
#    define REGc    ecx
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#    define REGd    edx
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#    define REGSP   esp
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#else
typedef int x86_reg;
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#endif

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#define HAVE_7REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE && HAVE_EBP_AVAILABLE))
#define HAVE_6REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE || HAVE_EBP_AVAILABLE))
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#if ARCH_X86_64 && defined(PIC)
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#    define BROKEN_RELOCATIONS 1
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#endif

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/*
 * If gcc is not set to support sse (-msse) it will not accept xmm registers
 * in the clobber list for inline asm. XMM_CLOBBERS takes a list of xmm
 * registers to be marked as clobbered and evaluates to nothing if they are
 * not supported, or to the list itself if they are supported. Since a clobber
 * list may not be empty, XMM_CLOBBERS_ONLY should be used if the xmm
 * registers are the only in the clobber list.
 * For example a list with "eax" and "xmm0" as clobbers should become:
 * : XMM_CLOBBERS("xmm0",) "eax"
 * and a list with only "xmm0" should become:
 * XMM_CLOBBERS_ONLY("xmm0")
 */
#if HAVE_XMM_CLOBBERS
#    define XMM_CLOBBERS(...)        __VA_ARGS__
#    define XMM_CLOBBERS_ONLY(...) : __VA_ARGS__
#else
#    define XMM_CLOBBERS(...)
#    define XMM_CLOBBERS_ONLY(...)
#endif

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#endif /* AVUTIL_X86_CPU_H */