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152 lines
5.8 KiB
152 lines
5.8 KiB
/* |
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* 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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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; 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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*/ |
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#ifndef AVUTIL_X86_ASM_H |
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#define AVUTIL_X86_ASM_H |
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#include <stdint.h> |
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#include "config.h" |
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typedef struct xmm_reg { uint64_t a, b; } xmm_reg; |
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#if ARCH_X86_64 |
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# define OPSIZE "q" |
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# define REG_a "rax" |
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# define REG_b "rbx" |
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# define REG_c "rcx" |
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# define REG_d "rdx" |
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# define REG_D "rdi" |
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# define REG_S "rsi" |
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# define PTR_SIZE "8" |
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typedef int64_t x86_reg; |
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# define REG_SP "rsp" |
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# define REG_BP "rbp" |
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# define REGBP rbp |
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# define REGa rax |
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# define REGb rbx |
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# 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" |
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# define REG_b "ebx" |
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# define REG_c "ecx" |
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# define REG_d "edx" |
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# define REG_D "edi" |
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# define REG_S "esi" |
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# define PTR_SIZE "4" |
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typedef int32_t x86_reg; |
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# define REG_SP "esp" |
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# define REG_BP "ebp" |
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# define REGBP ebp |
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# define REGa eax |
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# define REGb ebx |
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# define REGc ecx |
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# define REGd edx |
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# define REGSP esp |
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#else |
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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)) |
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#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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/* |
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* If gcc is not set to support sse (-msse) it will not accept xmm registers |
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* in the clobber list for inline asm. XMM_CLOBBERS takes a list of xmm |
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* registers to be marked as clobbered and evaluates to nothing if they are |
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* not supported, or to the list itself if they are supported. Since a clobber |
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* list may not be empty, XMM_CLOBBERS_ONLY should be used if the xmm |
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* registers are the only in the clobber list. |
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* For example a list with "eax" and "xmm0" as clobbers should become: |
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* : XMM_CLOBBERS("xmm0",) "eax" |
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* and a list with only "xmm0" should become: |
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* XMM_CLOBBERS_ONLY("xmm0") |
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*/ |
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#if HAVE_XMM_CLOBBERS |
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# define XMM_CLOBBERS(...) __VA_ARGS__ |
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# define XMM_CLOBBERS_ONLY(...) : __VA_ARGS__ |
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#else |
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# define XMM_CLOBBERS(...) |
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# define XMM_CLOBBERS_ONLY(...) |
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#endif |
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/* Use to export labels from asm. */ |
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#define LABEL_MANGLE(a) EXTERN_PREFIX #a |
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// Use rip-relative addressing if compiling PIC code on x86-64. |
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#if ARCH_X86_64 && defined(PIC) |
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# define LOCAL_MANGLE(a) #a "(%%rip)" |
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#else |
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# define LOCAL_MANGLE(a) #a |
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#endif |
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#if HAVE_INLINE_ASM_DIRECT_SYMBOL_REFS |
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# define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a) |
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# define NAMED_CONSTRAINTS_ADD(...) |
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# define NAMED_CONSTRAINTS(...) |
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# define NAMED_CONSTRAINTS_ARRAY_ADD(...) |
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# define NAMED_CONSTRAINTS_ARRAY(...) |
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#else |
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/* When direct symbol references are used in code passed to a compiler that does not support them |
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* then these references need to be converted to named asm constraints instead. |
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* Instead of returning a direct symbol MANGLE now returns a named constraint for that specific symbol. |
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* In order for this to work there must also be a corresponding entry in the asm-interface. To add this |
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* entry use the macro NAMED_CONSTRAINTS() and pass in a list of each symbol reference used in the |
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* corresponding block of code. (e.g. NAMED_CONSTRAINTS(var1,var2,var3) where var1 is the first symbol etc. ). |
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* If there are already existing constraints then use NAMED_CONSTRAINTS_ADD to add to the existing constraint list. |
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*/ |
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# define MANGLE(a) "%["#a"]" |
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// Intel/MSVC does not correctly expand va-args so we need a rather ugly hack in order to get it to work |
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# define FE_0(P,X) P(X) |
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# define FE_1(P,X,X1) P(X), FE_0(P,X1) |
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# define FE_2(P,X,X1,X2) P(X), FE_1(P,X1,X2) |
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# define FE_3(P,X,X1,X2,X3) P(X), FE_2(P,X1,X2,X3) |
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# define FE_4(P,X,X1,X2,X3,X4) P(X), FE_3(P,X1,X2,X3,X4) |
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# define FE_5(P,X,X1,X2,X3,X4,X5) P(X), FE_4(P,X1,X2,X3,X4,X5) |
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# define FE_6(P,X,X1,X2,X3,X4,X5,X6) P(X), FE_5(P,X1,X2,X3,X4,X5,X6) |
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# define FE_7(P,X,X1,X2,X3,X4,X5,X6,X7) P(X), FE_6(P,X1,X2,X3,X4,X5,X6,X7) |
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# 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) |
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# 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) |
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# define GET_FE_IMPL(_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,NAME,...) NAME |
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# define GET_FE(A) GET_FE_IMPL A |
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# define GET_FE_GLUE(x, y) x y |
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# 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__)) |
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# define NAME_CONSTRAINT(x) [x] "m"(x) |
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// Parameters are a list of each symbol reference required |
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# define NAMED_CONSTRAINTS_ADD(...) , FOR_EACH_VA(NAME_CONSTRAINT,__VA_ARGS__) |
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// Same but without comma for when there are no previously defined constraints |
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# define NAMED_CONSTRAINTS(...) FOR_EACH_VA(NAME_CONSTRAINT,__VA_ARGS__) |
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// Same as above NAMED_CONSTRAINTS except used for passing arrays/pointers instead of normal variables |
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# define NAME_CONSTRAINT_ARRAY(x) [x] "m"(*x) |
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# define NAMED_CONSTRAINTS_ARRAY_ADD(...) , FOR_EACH_VA(NAME_CONSTRAINT_ARRAY,__VA_ARGS__) |
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# define NAMED_CONSTRAINTS_ARRAY(...) FOR_EACH_VA(NAME_CONSTRAINT_ARRAY,__VA_ARGS__) |
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#endif |
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#endif /* AVUTIL_X86_ASM_H */
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