src/mesa/glapi/glx86asm.py

   1 #!/usr/bin/env python
   2
   3 # $Id: glx86asm.py,v 1.1 2000/05/11 23:14:57 brianp Exp $
   4
   5 # Mesa 3-D graphics library
   6 # Version:  3.3
   7 #
   8 # Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
   9 #
  10 # Permission is hereby granted, free of charge, to any person obtaining a
  11 # copy of this software and associated documentation files (the "Software"),
  12 # to deal in the Software without restriction, including without limitation
  13 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
  14 # and/or sell copies of the Software, and to permit persons to whom the
  15 # Software is furnished to do so, subject to the following conditions:
  16 #
  17 # The above copyright notice and this permission notice shall be included
  18 # in all copies or substantial portions of the Software.
  19 #
  20 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23 # BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  24 # AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  25 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26
  27
  28 # Generate the glapi_x86.S assembly language file.
  29 #
  30 # Usage:
  31 #    glx86asm.py >glapi_x86.S
  32 #
  33 # Dependencies:
  34 #    The gl.spec file from the SI must be in the current directory.
  35 #
  36 # Brian Paul  11 May 2000
  37
  38
  39 import string
  40 import re
  41
  42
  43 def PrintHead():
  44         print '/* DO NOT EDIT - This file generated automatically with glx86asm.py script */'
  45         print '#include "assyntax.h"'
  46         print '#include "glapioffsets.h"'
  47         print ''
  48         print '#ifndef __WIN32__'
  49         print ''
  50         print '#if defined(USE_MGL_NAMESPACE)'
  51         print '#define GL_PREFIX(n) GLNAME(mgl ## n)'
  52         print '#else'
  53         print '#define GL_PREFIX(n) GLNAME(gl ## n)'
  54         print '#endif'
  55         print ''
  56         print '#define GL_OFFSET(x) CODEPTR(REGOFF(4 * x, EAX))'
  57         print ''
  58         print '#ifdef GNU_ASSEMBLER'
  59         print '#define GLOBL_FN(x) GLOBL x ; .type x,@function'
  60         print '#else'
  61         print '#define GLOBL_FN(x) GLOBL x'
  62         print '#endif'
  63         print ''
  64         print ''
  65         return
  66 #endif
  67
  68
  69 def PrintTail():
  70         print ''
  71         print '#endif  /* __WIN32__ */'
  72 #endif
  73
  74
  75 def GenerateDispatchCode(name, offset):
  76         print 'ALIGNTEXT16'
  77         print "GLOBL_FN(GL_PREFIX(%s))" % (name)
  78         print "GL_PREFIX(%s):" % (name)
  79         print '\tMOV_L(GLNAME(_glapi_Dispatch), EAX)'
  80         print '\tTEST_L(EAX, EAX)'
  81         print "\tJZ(GLNAME(_glapi_fallback_%s))" % (name)
  82         print "\tJMP(GL_OFFSET(_gloffset_%s))" % (offset)
  83         print ''
  84 #enddef
  85
  86
  87 def FindAlias(list, funcName):
  88         for i in range(0, len(list)):
  89                 entry = list[i]
  90                 if entry[0] == funcName:
  91                         return entry[1]
  92                 #endif
  93         #endfor
  94         return ''
  95 #enddef
  96
  97
  98
  99 def PrintDefines():
 100         functionPattern = re.compile('^[a-zA-Z0-9]+\(')
 101         functionNamePattern = re.compile('^[a-zA-Z0-9]+')
 102
 103         funcName = ''
 104         functions = [ ]
 105
 106         f = open('gl.spec')
 107         for line in f.readlines():
 108
 109                 m = functionPattern.match(line)
 110                 if m:
 111                         # extract funcName
 112                         n = functionNamePattern.findall(line)
 113                         funcName = n[0]
 114
 115                 m = string.split(line)
 116                 if len(m) > 1:
 117                         if m[0] == 'param':
 118                                 paramName = m[1]
 119                         if m[0] == 'offset':
 120                                 if m[1] == '?':
 121                                         #print 'WARNING skipping', funcName
 122                                         noop = 0
 123                                 else:
 124                                         entry = [ funcName, funcName ]
 125                                         functions.append(entry)
 126                                 #endif
 127                         elif m[0] == 'alias':
 128                                 aliasedName = FindAlias(functions, m[1])
 129                                 if aliasedName:
 130                                         entry = [ funcName, aliasedName ]
 131                                         functions.append(entry)
 132                                 else:
 133                                         print 'WARNING: alias to unknown function:', aliasedName
 134                                 #endif
 135                         #endif
 136                 #endif
 137         #endfor
 138
 139         # Now generate the assembly dispatch code
 140         for i in range(0, len(functions)):
 141                 entry = functions[i]
 142                 GenerateDispatchCode( entry[0], entry[1] )
 143
 144 #enddef
 145
 146
 147
 148 PrintHead()
 149 PrintDefines()
 150 PrintTail()