1 /* 2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 #ifndef AVUTIL_X86_ASM_H 22 #define AVUTIL_X86_ASM_H 23 24 #include <stdint.h> 25 26 #include "config.h" 27 28 typedef struct xmm_reg { uint64_t a, b; } xmm_reg; 29 typedef struct ymm_reg { uint64_t a, b, c, d; } ymm_reg; 30 31 /* avoid SunOS regset.h definition for REG_SP */ 32 #if defined (__sun) && defined (REG_SP) 33 #undef REG_SP 34 #endif 35 36 #if ARCH_X86_64 37 # define OPSIZE "q" 38 # define REG_a "rax" 39 # define REG_b "rbx" 40 # define REG_c "rcx" 41 # define REG_d "rdx" 42 # define REG_D "rdi" 43 # define REG_S "rsi" 44 # define PTR_SIZE "8" 45 typedef int64_t x86_reg; 46 47 # define REG_SP "rsp" 48 # define REG_BP "rbp" 49 # define REGBP rbp 50 # define REGa rax 51 # define REGb rbx 52 # define REGc rcx 53 # define REGd rdx 54 # define REGSP rsp 55 56 #elif ARCH_X86_32 57 58 # define OPSIZE "l" 59 # define REG_a "eax" 60 # define REG_b "ebx" 61 # define REG_c "ecx" 62 # define REG_d "edx" 63 # define REG_D "edi" 64 # define REG_S "esi" 65 # define PTR_SIZE "4" 66 typedef int32_t x86_reg; 67 68 # define REG_SP "esp" 69 # define REG_BP "ebp" 70 # define REGBP ebp 71 # define REGa eax 72 # define REGb ebx 73 # define REGc ecx 74 # define REGd edx 75 # define REGSP esp 76 #else 77 typedef int x86_reg; 78 #endif 79 80 #define HAVE_7REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE && HAVE_EBP_AVAILABLE)) 81 #define HAVE_6REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE || HAVE_EBP_AVAILABLE)) 82 83 #if ARCH_X86_64 && defined(PIC) 84 # define BROKEN_RELOCATIONS 1 85 #endif 86 87 /* 88 * If gcc is not set to support sse (-msse) it will not accept xmm registers 89 * in the clobber list for inline asm. XMM_CLOBBERS takes a list of xmm 90 * registers to be marked as clobbered and evaluates to nothing if they are 91 * not supported, or to the list itself if they are supported. Since a clobber 92 * list may not be empty, XMM_CLOBBERS_ONLY should be used if the xmm 93 * registers are the only in the clobber list. 94 * For example a list with "eax" and "xmm0" as clobbers should become: 95 * : XMM_CLOBBERS("xmm0",) "eax" 96 * and a list with only "xmm0" should become: 97 * XMM_CLOBBERS_ONLY("xmm0") 98 */ 99 #if HAVE_XMM_CLOBBERS 100 # define XMM_CLOBBERS(...) __VA_ARGS__ 101 # define XMM_CLOBBERS_ONLY(...) : __VA_ARGS__ 102 #else 103 # define XMM_CLOBBERS(...) 104 # define XMM_CLOBBERS_ONLY(...) 105 #endif 106 107 /* Use to export labels from asm. */ 108 #define LABEL_MANGLE(a) EXTERN_PREFIX #a 109 110 // Use rip-relative addressing if compiling PIC code on x86-64. 111 #if ARCH_X86_64 && defined(PIC) 112 # define LOCAL_MANGLE(a) #a "(%%rip)" 113 #else 114 # define LOCAL_MANGLE(a) #a 115 #endif 116 117 #if HAVE_INLINE_ASM_DIRECT_SYMBOL_REFS 118 # define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a) 119 # define NAMED_CONSTRAINTS_ADD(...) 120 # define NAMED_CONSTRAINTS(...) 121 # define NAMED_CONSTRAINTS_ARRAY_ADD(...) 122 # define NAMED_CONSTRAINTS_ARRAY(...) 123 #else 124 /* When direct symbol references are used in code passed to a compiler that does not support them 125 * then these references need to be converted to named asm constraints instead. 126 * Instead of returning a direct symbol MANGLE now returns a named constraint for that specific symbol. 127 * In order for this to work there must also be a corresponding entry in the asm-interface. To add this 128 * entry use the macro NAMED_CONSTRAINTS() and pass in a list of each symbol reference used in the 129 * corresponding block of code. (e.g. NAMED_CONSTRAINTS(var1,var2,var3) where var1 is the first symbol etc. ). 130 * If there are already existing constraints then use NAMED_CONSTRAINTS_ADD to add to the existing constraint list. 131 */ 132 # define MANGLE(a) "%["#a"]" 133 // Intel/MSVC does not correctly expand va-args so we need a rather ugly hack in order to get it to work 134 # define FE_0(P,X) P(X) 135 # define FE_1(P,X,X1) P(X), FE_0(P,X1) 136 # define FE_2(P,X,X1,X2) P(X), FE_1(P,X1,X2) 137 # define FE_3(P,X,X1,X2,X3) P(X), FE_2(P,X1,X2,X3) 138 # define FE_4(P,X,X1,X2,X3,X4) P(X), FE_3(P,X1,X2,X3,X4) 139 # define FE_5(P,X,X1,X2,X3,X4,X5) P(X), FE_4(P,X1,X2,X3,X4,X5) 140 # define FE_6(P,X,X1,X2,X3,X4,X5,X6) P(X), FE_5(P,X1,X2,X3,X4,X5,X6) 141 # define FE_7(P,X,X1,X2,X3,X4,X5,X6,X7) P(X), FE_6(P,X1,X2,X3,X4,X5,X6,X7) 142 # 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) 143 # 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) 144 # define GET_FE_IMPL(_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,NAME,...) NAME 145 # define GET_FE(A) GET_FE_IMPL A 146 # define GET_FE_GLUE(x, y) x y 147 # 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__)) 148 # define NAME_CONSTRAINT(x) [x] "m"(x) 149 // Parameters are a list of each symbol reference required 150 # define NAMED_CONSTRAINTS_ADD(...) , FOR_EACH_VA(NAME_CONSTRAINT,__VA_ARGS__) 151 // Same but without comma for when there are no previously defined constraints 152 # define NAMED_CONSTRAINTS(...) FOR_EACH_VA(NAME_CONSTRAINT,__VA_ARGS__) 153 // Same as above NAMED_CONSTRAINTS except used for passing arrays/pointers instead of normal variables 154 # define NAME_CONSTRAINT_ARRAY(x) [x] "m"(*x) 155 # define NAMED_CONSTRAINTS_ARRAY_ADD(...) , FOR_EACH_VA(NAME_CONSTRAINT_ARRAY,__VA_ARGS__) 156 # define NAMED_CONSTRAINTS_ARRAY(...) FOR_EACH_VA(NAME_CONSTRAINT_ARRAY,__VA_ARGS__) 157 #endif 158 159 #endif /* AVUTIL_X86_ASM_H */ 160