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  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. #include "config.h"
  26.  
  27. typedef struct xmm_reg { uint64_t a, b; } xmm_reg;
  28.  
  29. #if ARCH_X86_64
  30. #    define OPSIZE "q"
  31. #    define REG_a "rax"
  32. #    define REG_b "rbx"
  33. #    define REG_c "rcx"
  34. #    define REG_d "rdx"
  35. #    define REG_D "rdi"
  36. #    define REG_S "rsi"
  37. #    define PTR_SIZE "8"
  38. typedef int64_t x86_reg;
  39.  
  40. #    define REG_SP "rsp"
  41. #    define REG_BP "rbp"
  42. #    define REGBP   rbp
  43. #    define REGa    rax
  44. #    define REGb    rbx
  45. #    define REGc    rcx
  46. #    define REGd    rdx
  47. #    define REGSP   rsp
  48.  
  49. #elif ARCH_X86_32
  50.  
  51. #    define OPSIZE "l"
  52. #    define REG_a "eax"
  53. #    define REG_b "ebx"
  54. #    define REG_c "ecx"
  55. #    define REG_d "edx"
  56. #    define REG_D "edi"
  57. #    define REG_S "esi"
  58. #    define PTR_SIZE "4"
  59. typedef int32_t x86_reg;
  60.  
  61. #    define REG_SP "esp"
  62. #    define REG_BP "ebp"
  63. #    define REGBP   ebp
  64. #    define REGa    eax
  65. #    define REGb    ebx
  66. #    define REGc    ecx
  67. #    define REGd    edx
  68. #    define REGSP   esp
  69. #else
  70. typedef int x86_reg;
  71. #endif
  72.  
  73. #define HAVE_7REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE && HAVE_EBP_AVAILABLE))
  74. #define HAVE_6REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE || HAVE_EBP_AVAILABLE))
  75.  
  76. #if ARCH_X86_64 && defined(PIC)
  77. #    define BROKEN_RELOCATIONS 1
  78. #endif
  79.  
  80. /*
  81.  * If gcc is not set to support sse (-msse) it will not accept xmm registers
  82.  * in the clobber list for inline asm. XMM_CLOBBERS takes a list of xmm
  83.  * registers to be marked as clobbered and evaluates to nothing if they are
  84.  * not supported, or to the list itself if they are supported. Since a clobber
  85.  * list may not be empty, XMM_CLOBBERS_ONLY should be used if the xmm
  86.  * registers are the only in the clobber list.
  87.  * For example a list with "eax" and "xmm0" as clobbers should become:
  88.  * : XMM_CLOBBERS("xmm0",) "eax"
  89.  * and a list with only "xmm0" should become:
  90.  * XMM_CLOBBERS_ONLY("xmm0")
  91.  */
  92. #if HAVE_XMM_CLOBBERS
  93. #    define XMM_CLOBBERS(...)        __VA_ARGS__
  94. #    define XMM_CLOBBERS_ONLY(...) : __VA_ARGS__
  95. #else
  96. #    define XMM_CLOBBERS(...)
  97. #    define XMM_CLOBBERS_ONLY(...)
  98. #endif
  99.  
  100. /* Use to export labels from asm. */
  101. #define LABEL_MANGLE(a) EXTERN_PREFIX #a
  102.  
  103. // Use rip-relative addressing if compiling PIC code on x86-64.
  104. #if ARCH_X86_64 && defined(PIC)
  105. #    define LOCAL_MANGLE(a) #a "(%%rip)"
  106. #else
  107. #    define LOCAL_MANGLE(a) #a
  108. #endif
  109.  
  110. #define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
  111.  
  112. #endif /* AVUTIL_X86_ASM_H */
  113.