/* * copyright (c) 2006 Michael Niedermayer * * 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 typedef struct xmm_reg { uint64_t a, b; } xmm_reg; typedef struct ymm_reg { uint64_t a, b, c, d; } ymm_reg; #if ARCH_X86_64 #define FF_OPSIZE "q" #define FF_REG_a "rax" #define FF_REG_b "rbx" #define FF_REG_c "rcx" #define FF_REG_d "rdx" #define FF_REG_D "rdi" #define FF_REG_S "rsi" #define FF_PTR_SIZE "8" typedef int64_t x86_reg; /* FF_REG_SP is defined in Solaris sys headers, so use FF_REG_sp */ #define FF_REG_sp "rsp" #define FF_REG_BP "rbp" #define FF_REGBP rbp #define FF_REGa rax #define FF_REGb rbx #define FF_REGc rcx #define FF_REGd rdx #define FF_REGSP rsp #elif ARCH_X86_32 #define FF_OPSIZE "l" #define FF_REG_a "eax" #define FF_REG_b "ebx" #define FF_REG_c "ecx" #define FF_REG_d "edx" #define FF_REG_D "edi" #define FF_REG_S "esi" #define FF_PTR_SIZE "4" typedef int32_t x86_reg; #define FF_REG_sp "esp" #define FF_REG_BP "ebp" #define FF_REGBP ebp #define FF_REGa eax #define FF_REGb ebx #define FF_REGc ecx #define FF_REGd edx #define FF_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 */