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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* 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
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_X86_ASM_H
#define AVUTIL_X86_ASM_H
#include <stdint.h>
#include "config.h"
typedef struct xmm_reg { uint64_t a, b; } xmm_reg;
#if ARCH_X86_64
# define OPSIZE "q"
# 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"
typedef int64_t x86_reg;
# define REG_SP "rsp"
# define REG_BP "rbp"
# define REGBP rbp
# define REGa rax
# define REGb rbx
# define REGc rcx
# define REGd rdx
# define REGSP rsp
#elif ARCH_X86_32
# define OPSIZE "l"
# 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"
typedef int32_t x86_reg;
# define REG_SP "esp"
# define REG_BP "ebp"
# define REGBP ebp
# define REGa eax
# define REGb ebx
# define REGc ecx
# define REGd edx
# define REGSP esp
#else
typedef int x86_reg;
#endif
#define HAVE_7REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE && HAVE_EBP_AVAILABLE))
#define HAVE_6REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE || HAVE_EBP_AVAILABLE))
#if ARCH_X86_64 && defined(PIC)
# define BROKEN_RELOCATIONS 1
#endif
/*
* 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
/* Use to export labels from asm. */
#define LABEL_MANGLE(a) EXTERN_PREFIX #a
// Use rip-relative addressing if compiling PIC code on x86-64.
#if ARCH_X86_64 && defined(PIC)
# define LOCAL_MANGLE(a) #a "(%%rip)"
#else
# define LOCAL_MANGLE(a) #a
#endif
#if HAVE_INLINE_ASM_DIRECT_SYMBOL_REFS
# define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
# define NAMED_CONSTRAINTS_ADD(...)
# define NAMED_CONSTRAINTS(...)
# define NAMED_CONSTRAINTS_ARRAY_ADD(...)
# define NAMED_CONSTRAINTS_ARRAY(...)
#else
/* When direct symbol references are used in code passed to a compiler that does not support them
* then these references need to be converted to named asm constraints instead.
* Instead of returning a direct symbol MANGLE now returns a named constraint for that specific symbol.
* In order for this to work there must also be a corresponding entry in the asm-interface. To add this
* entry use the macro NAMED_CONSTRAINTS() and pass in a list of each symbol reference used in the
* corresponding block of code. (e.g. NAMED_CONSTRAINTS(var1,var2,var3) where var1 is the first symbol etc. ).
* If there are already existing constraints then use NAMED_CONSTRAINTS_ADD to add to the existing constraint list.
*/
# define MANGLE(a) "%["#a"]"
// Intel/MSVC does not correctly expand va-args so we need a rather ugly hack in order to get it to work
# define FE_0(P,X) P(X)
# define FE_1(P,X,X1) P(X), FE_0(P,X1)
# define FE_2(P,X,X1,X2) P(X), FE_1(P,X1,X2)
# define FE_3(P,X,X1,X2,X3) P(X), FE_2(P,X1,X2,X3)
# define FE_4(P,X,X1,X2,X3,X4) P(X), FE_3(P,X1,X2,X3,X4)
# define FE_5(P,X,X1,X2,X3,X4,X5) P(X), FE_4(P,X1,X2,X3,X4,X5)
# define FE_6(P,X,X1,X2,X3,X4,X5,X6) P(X), FE_5(P,X1,X2,X3,X4,X5,X6)
# define FE_7(P,X,X1,X2,X3,X4,X5,X6,X7) P(X), FE_6(P,X1,X2,X3,X4,X5,X6,X7)
# define FE_8(P,X,X1,X2,X3,X4,X5,X6,X7,X8) P(X), FE_7(P,X1,X2,X3,X4,X5,X6,X7,X8)
# define FE_9(P,X,X1,X2,X3,X4,X5,X6,X7,X8,X9) P(X), FE_8(P,X1,X2,X3,X4,X5,X6,X7,X8,X9)
# define GET_FE_IMPL(_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,NAME,...) NAME
# define GET_FE(A) GET_FE_IMPL A
# define GET_FE_GLUE(x, y) x y
# define FOR_EACH_VA(P,...) GET_FE_GLUE(GET_FE((__VA_ARGS__,FE_9,FE_8,FE_7,FE_6,FE_5,FE_4,FE_3,FE_2,FE_1,FE_0)), (P,__VA_ARGS__))
# define NAME_CONSTRAINT(x) [x] "m"(x)
// Parameters are a list of each symbol reference required
# define NAMED_CONSTRAINTS_ADD(...) , FOR_EACH_VA(NAME_CONSTRAINT,__VA_ARGS__)
// Same but without comma for when there are no previously defined constraints
# define NAMED_CONSTRAINTS(...) FOR_EACH_VA(NAME_CONSTRAINT,__VA_ARGS__)
// Same as above NAMED_CONSTRAINTS except used for passing arrays/pointers instead of normal variables
# define NAME_CONSTRAINT_ARRAY(x) [x] "m"(*x)
# define NAMED_CONSTRAINTS_ARRAY_ADD(...) , FOR_EACH_VA(NAME_CONSTRAINT_ARRAY,__VA_ARGS__)
# define NAMED_CONSTRAINTS_ARRAY(...) FOR_EACH_VA(NAME_CONSTRAINT_ARRAY,__VA_ARGS__)
#endif
#endif /* AVUTIL_X86_ASM_H */
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