| /* |
| * 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; |
| typedef struct ymm_reg { uint64_t a, b, c, d; } ymm_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 */ |